Semi-Annual Report by Investment Company (Form N-CSRS)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act File number: 811-10041

JNL Investors Series Trust

(Exact name of registrant as specified in charter)

1 Corporate Way, Lansing, Michigan 48951

(Address of principal executive offices)

225 West Wacker Drive, Suite 1200, Chicago, Illinois 60606

(Mailing address)

Garett J. Childs

Jackson National Asset Management, LLC

225 West Wacker Drive, Suite 1200

Chicago, Illinois 60606

(Name and address of agent for service)

Registrant's telephone number, including area code: (517) 381-5500

Date of Fiscal Year End: December 31

Date of Reporting Period: January 1,2026 -June 30, 2026

Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 100 F Street, NE, Washington, DC 20549-1090. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. §3507.

Item 1. Report to Shareholders.

JNL Government Money Market Fund
Semi-Annual Shareholder Report
Share Class SL		June 30, 2026

This shareholder report contains important information about JNL Government Money Market Fund for the period ended June 30, 2026. You can obtain additional information by contacting us at 1-800-392-2909, or writing the JNL Investors Series Trust, 225 W. Wacker Drive, Suite 1200, Chicago, IL 60606.

What were the Fund costs for the last six months?

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class SL	$4	0.08%

What are some key Fund statistics as of June 30, 2026?

Fund Statistic	Value ($ in thousands)
Fund Size ($):	3,274,668
Number of Investments:	153
Total Advisory Fees Paid ($):	1,358

What did the Fund invest in as of June 30, 2026?

Industry Sector (%)
Long Investments
Government Securities	52.3
Repurchase Agreements	43.4
Discount Notes	2.9
Total Net Assets	98.6

Where can I find additional information about the Fund?

Additional information is available on the Fund's website at https://www.jackson.com/fund-literature.html, including:

w Prospectus

w Statement of Additional Information

w Financial information

w Holdings

w Proxy voting information

If you have questions regarding electronic delivery, please scan the QR code.

JNL Government Money Market Fund
Semi-Annual Shareholder Report
Share Class I		June 30, 2026

This shareholder report contains important information about JNL Government Money Market Fund for the period ended June 30, 2026. You can obtain additional information by contacting us at 1-800-392-2909, or writing the JNL Investors Series Trust, 225 W. Wacker Drive, Suite 1200, Chicago, IL 60606.

What were the Fund costs for the last six months?

Share Class	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$9	0.18%

What are some key Fund statistics as of June 30, 2026?

Fund Statistic	Value ($ in thousands)
Fund Size ($):	3,274,668
Number of Investments:	153
Total Advisory Fees Paid ($):	1,358

What did the Fund invest in as of June 30, 2026?

Industry Sector (%)
Long Investments
Government Securities	52.3
Repurchase Agreements	43.4
Discount Notes	2.9
Total Net Assets	98.6

Where can I find additional information about the Fund?

Additional information is available on the Fund's website at https://www.jackson.com/fund-literature.html, including:

w Prospectus

w Statement of Additional Information

w Financial information

w Holdings

w Proxy voting information

If you have questions regarding electronic delivery, please scan the QR code.

(b) Not Applicable

Item 2. Code of Ethics.

Not applicable to the semi-annual filing.

Item 3. Audit Committee Financial Expert.

Not applicable to the semi-annual filing.

Item 4. Principal Accountant Fees and Services.

Not applicable to the semi-annual filing.

Item 5. Audit Committee of Listed Registrants.

Not applicable.

Item 6. Investments.

(a) Included as a part of the financial statements under Item 7.

(b) Not applicable.

Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies.

JNL Investors Series Trust (Unaudited)

Schedule of Investments (in thousands)

June 30, 2026

				Shares/Par1		Value ($)
JNL Government Money Market Fund
GOVERNMENT AND AGENCY OBLIGATIONS 55.2%
U.S. Treasury Bill 21.0%
	Treasury, United States Department of
		3.60%, 07/02/26 (a)		48,200		48,195
		3.67%, 07/09/26 (a)		27,000		26,978
		3.66%, 07/14/26 - 11/05/26 (a)		53,200		52,921
		3.65%, 07/21/26 (a)		23,000		22,954
		3.57%, 07/23/26 (a)		35,000		34,925
		3.55%, 08/13/26 (a)		9,500		9,460
		3.68%, 08/18/26 (a)		15,000		14,927
		3.66%, 08/25/26 (a)		7,500		7,459
		3.67%, 09/01/26 (a)		15,000		14,906
		3.58%, 09/03/26 (a)		13,900		13,813
		3.66%, 09/08/26 (a)		11,500		11,421
		3.62%, 09/10/26 (a)		25,600		25,420
		3.67%, 09/15/26 - 11/19/26 (a)		43,900		43,461
		3.68%, 09/24/26 (a)		15,000		14,871
		3.68%, 09/29/26 (a)		19,000		18,828
		3.66%, 10/01/26 (a)		22,400		22,194
		3.69%, 10/06/26 (a)		16,000		15,843
		3.67%, 10/08/26 (a)		6,900		6,831
		3.72%, 10/13/26 (a)		17,000		16,820
		3.66%, 10/15/26 (a)		19,250		19,045
		3.64%, 10/22/26 (a)		12,800		12,656
		3.82%, 10/27/26 (a)		11,000		10,864
		3.64%, 10/29/26 (a)		15,200		15,018
		3.67%, 11/12/26 (a)		17,900		17,659
		3.60%, 11/27/26 (a)		59,800		58,921
		3.72%, 12/03/26 (a)		18,000		17,716
		3.73%, 12/17/26 (a)		12,700		12,481
		3.71%, 12/24/26 (a)		37,300		36,633
		3.44%, 01/21/27 (a)		35,000		34,328
		3.53%, 03/18/27 (a)		10,100		9,846
		3.61%, 04/15/27 (a)		16,800		16,322
		3.70%, 05/13/27 (a)		5,900		5,711
					689,427
U.S. Government Agency Obligations 16.4%
	Council of Federal Home Loan Banks
		3.62%, (SOFR + 0.01%), 07/10/26 - 08/21/26 (b) (c)		39,600		39,600
		3.63%, (SOFR + 0.01%), 08/13/26 (b) (c)		12,300		12,300
		3.63%, (SOFR + 0.01%), 08/18/26 - 09/28/26 (b) (c)		24,100		24,100
		3.64%, (SOFR + 0.02%), 09/18/26 - 11/09/26 (b) (c)		20,600		20,600
		3.65%, (SOFR + 0.03%), 10/19/26 - 11/05/26 (b) (c)		32,500		32,500
		3.80%, 11/06/26 (c)		25,000		25,000
		3.84%, 11/06/26 (c)		13,200		13,200
		3.65%, (SOFR + 0.03%), 11/24/26 - 12/22/26 (b) (c)		40,500		40,500
		3.66%, (SOFR + 0.04%), 12/17/26 - 01/21/27 (b) (c)		28,800		28,800
		3.66%, (SOFR + 0.04%), 01/28/27 (b) (c)		9,800		9,800
		3.72%, (SOFR + 0.10%), 03/16/27 - 03/18/27 (b) (c)		8,800		8,800
		3.67%, (SOFR + 0.05%), 05/20/27 (b) (c)		5,600		5,600
		3.67%, (SOFR + 0.06%), 05/27/27 - 06/01/27 (b) (c)		18,000		18,000
		3.73%, (SOFR + 0.11%), 07/16/27 (b) (c)		1,600		1,600
		3.74%, (SOFR + 0.12%), 08/11/27 - 08/12/27 (b) (c)		7,000		7,000
		3.76%, (SOFR + 0.14%), 08/26/27 (b) (c)		4,900		4,900
		3.76%, (SOFR + 0.14%), 09/23/27 (b) (c)		3,300		3,300
		3.80%, (SOFR + 0.18%), 10/08/27 (b) (c)		12,200		12,200
		3.77%, (SOFR + 0.15%), 11/19/27 (b) (c)		8,400		8,400
		3.71%, (SOFR + 0.09%), 03/30/28 (b) (c)		4,000		4,000
	Federal Farm Credit Banks Funding Corporation
		3.76%, (SOFR + 0.14%), 09/04/26 - 12/02/26 (b) (c)		34,500		34,500
		3.76%, (SOFR + 0.14%), 09/16/26 (b) (c)		1,500		1,500
		3.71%, (SOFR + 0.09%), 05/12/27 - 05/15/28 (b) (c)		16,000		16,000
		3.74%, (SOFR + 0.12%), 08/04/27 (b) (c)		3,300		3,300
		3.71%, (SOFR + 0.09%), 04/07/28 (b) (c)		7,200		7,200
	Federal Home Loan Bank of Dallas
		3.76%, (SOFR + 0.14%), 10/29/26 (b) (c)		6,000		6,000
	Federal Home Loan Bank of Topeka
		3.76%, (SOFR + 0.14%), 09/10/26 - 09/18/26 (b) (c)		14,000		14,000
		3.66%, (SOFR + 0.04%), 11/04/26 - 11/16/26 (b) (c)		9,700		9,700
		3.66%, (SOFR + 0.04%), 12/14/26 - 01/19/27 (b) (c)		21,000		21,000
		3.67%, (SOFR + 0.05%), 12/23/26 - 01/29/27 (b) (c)		14,200		14,199
		3.67%, (SOFR + 0.04%), 01/14/27 (b) (c)		6,000		6,000
		3.67%, (SOFR + 0.06%), 03/01/27 - 03/16/27 (b) (c)		13,300		13,300
		3.72%, (SOFR + 0.10%), 12/17/27 (b) (c)		6,000		6,000
		3.71%, (SOFR + 0.09%), 06/09/28 (b) (c)		15,800		15,800
		3.73%, (SOFR + 0.11%), 06/16/28 (b) (c)		8,000		8,000
	Federal Home Loan Mortgage Corporation
		3.76%, (SOFR + 0.14%), 09/04/26 - 10/29/26 (b) (c)		15,200		15,200
	Federal National Mortgage Association, Inc.
		3.76%, (SOFR + 0.14%), 09/11/26 - 12/11/26 (b) (c)		24,500		24,500
					536,399
U.S. Treasury Note 14.9%
	Treasury, United States Department of
		3.91%, (3 Month Treasury + 0.18%), 07/31/26 (b)		44,000		43,997
		4.38%, 07/31/26		1,200		1,201
		3.75%, 08/31/26 - 04/30/27		26,600		26,595
		3.50%, 09/30/26		14,100		14,093
		4.63%, 10/15/26 - 06/15/27		7,600		7,644
		1.13%, 10/31/26		8,200		8,133
		3.93%, (3 Month Treasury + 0.20%), 10/31/26 (b)		35,500		35,504
		4.13%, 10/31/26 - 02/28/27		33,400		33,492
		4.25%, 11/30/26 - 03/15/27		49,300		49,463
		1.25%, 12/31/26		9,800		9,687
		1.50%, 01/31/27		5,600		5,535
		3.87%, (3 Month Treasury + 0.10%), 01/31/27 (b)		60,700		60,700
		1.88%, 02/28/27		4,700		4,648
		3.88%, 03/31/27 - 05/31/27		52,900		52,976
		2.75%, 04/30/27		2,600		2,578
		3.94%, (3 Month Treasury + 0.16%), 04/30/27 (b)		16,700		16,700
		2.63%, 05/31/27		8,100		8,011
		3.89%, (3 Month Treasury + 0.16%), 07/31/27 (b)		42,000		41,987
		3.92%, (3 Month Treasury + 0.19%), 10/31/27 (b)		33,000		33,016
		3.87%, (3 Month Treasury + 0.10%), 01/31/28 (b)		19,100		19,096
		3.83%, (3 Month Treasury + 0.10%), 04/30/28 (b)		13,600		13,602
					488,658
Discount Notes 2.9%
	FHLBanks Office of Finance
		3.55%, 07/17/26 (a) (c)		7,000		6,989
		3.58%, 07/22/26 (a) (c)		5,100		5,089
		3.59%, 07/24/26 (a) (c)		5,000		4,989
		3.59%, 08/26/26 (a) (c)		15,000		14,917
		3.59%, 09/09/26 (a) (c)		10,200		10,130
		3.71%, 09/16/26 (a) (c)		15,000		14,883
		3.68%, 10/07/26 (a) (c)		9,600		9,505
		3.66%, 10/28/26 (a) (c)		11,000		10,869
		3.71%, 11/25/26 (a) (c)		9,500		9,358
		3.65%, 01/21/27 (a) (c)		7,000		6,857
					93,586
	Total Government And Agency Obligations (cost $1,808,070)				1,808,070

See accompanying Notes to Financial Statements.

Abbreviations, counterparties and additional footnotes are defined on page 3.

1

JNL Investors Series Trust (Unaudited)

Schedule of Investments (in thousands)

June 30, 2026

			Shares/Par1		Value ($)
REPURCHASE AGREEMENTS 43.4%
	Repurchase Agreements (d)				1,420,000
	Total Repurchase Agreements (cost $1,420,000)			1,420,000
Total Investments 98.6% (cost $3,228,070)					3,228,070
Other Assets and Liabilities, Net 1.4%					46,598
Total Net Assets 100.0%					3,274,668

(a) The coupon rate represents the yield to maturity.

(b) Security has a variable rate. Interest rates reset periodically. Rate stated was in effect as of June 30, 2026. For securities based on a published reference rate and spread, the reference rate and spread are presented.

(c) The security is a direct debt of the agency and not collateralized by mortgages.

(d) For repurchase agreements held at June 30, 2026, see Repurchase Agreements in the Schedule of Investments.

Repurchase Agreements
Counter-party		Collateral		Collateral Par1		Collateral Value ($)		Rate (%)		Acquisition Date		Maturity Date		Proceeds at Maturity ($)		Par1		Value ($)
BNS		Treasury, United States Department of, 0.00%-4.88%, due 07/31/26-02/15/55		450,061		459,046		3.64		06/30/26		07/01/26		450,046		450,000		450,000
CIB		Treasury, United States Department of, 0.00%-5.00%, due 07/21/26-11/15/53		20,285		20,959
		Government National Mortgage Association, 2.00%-6.15%, due 04/20/50-05/20/72		10,550		6,161
		Federal National Mortgage Association, Inc., 1.65%-6.50%, due 10/01/27-03/01/56		409,737		278,052
		Federal Home Loan Mortgage Corporation, 1.50%-6.00%, due 11/01/50-08/01/53		166,974		153,828
				607,546		459,000		3.65		06/30/26		07/01/26		450,046		450,000		450,000
CTC		Treasury, United States Department of, 0.00%-5.00%, due 07/15/26-05/15/56		236,903		204,000		3.64		06/30/26		07/01/26		200,020		200,000		200,000
DWA		Government National Mortgage Association, 4.51%-6.50%, due 03/20/52-06/20/65		50,077		35,495
		Federal National Mortgage Association, Inc., 2.00%-6.39%, due 08/01/35-06/01/56		37,384		35,225
		Federal Home Loan Mortgage Corporation, 3.00%-6.83%, due 04/25/27-06/01/56		130,838		33,234
				218,299		103,954		3.65		06/30/26		07/01/26		100,010		100,000		100,000
FICC		Treasury, United States Department of, 3.88%, due 08/15/34		227,655		224,400		3.63		06/30/26		07/01/26		220,026		220,000		220,000
																		1,420,000

See accompanying Notes to Financial Statements.

Abbreviations, counterparties and additional footnotes are defined on page 3.

2

JNL Investors Series Trust (Unaudited)

Schedule of Investments (in thousands)

June 30, 2026

¹ Rounded par and notional amounts are listed in USD unless otherwise noted.

Abbreviations:

"-" Amount rounds to less than one thousand or 0.05%

SOFR - Secured Overnight Financing Rate

U.S. - United States

Counterparty Abbreviations:

BNS - The Bank of Nova Scotia, Toronto

CIB - Canadian Imperial Bank of Commerce

CTC - Creditag Corp

DWA - Daiwa Capital Markets America Inc.

FICC - Fixed Income Clearing Corporation

See accompanying Notes to Financial Statements.

3

JNL Investors Series Trust (Unaudited)

Statement of Assets and Liabilities (in thousands, except net asset value per share)

June 30, 2026

Assets
Investments - unaffiliated, at value		$	1,808,070
Repurchase agreements, at value			1,420,000
Cash			51,774
Receivable from:
	Dividends and interest		5,776
	Administrator		91
Other assets			12
Total assets			3,285,723
Liabilities
Payable for:
	Advisory fees		236
	Administrative fees		286
	Dividends		10,274
	Board of trustee fees		251
	Chief compliance officer fees		4
	Other expenses		4
Total liabilities			11,055
Net assets		$	3,274,668
Net assets consist of:
Paid-in capital		$	3,274,761
Total distributable earnings (loss)			(93	)
Net assets		$	3,274,668
Net assets - Class I		$	2,300,895
Shares outstanding - Class I			2,300,850
Net asset value per share - Class I		$	1.00
Net assets - Class SL		$	973,773
Shares outstanding - Class SL			973,766
Net asset value per share - Class SL		$	1.00
Investments - unaffiliated, at cost		$	1,808,070
Repurchase agreements, at cost			1,420,000

See accompanying Notes to Financial Statements.

4

JNL Investors Series Trust (Unaudited)

Statement of Operations (in thousands)

For the Period Ended June 30, 2026

Investment income
Interest			$	61,370
Total investment income				61,370
Expenses
Advisory fees				1,358
Administrative fees				1,639
Legal fees				12
Board of trustee fees				27
Chief compliance officer fees				8
Other expenses				12
Total expenses				3,056
Administrative fees waiver				(476	)
Net expenses				2,580
Net investment income (loss)				58,790
Realized and unrealized gain (loss)
Net realized gain (loss) on:
	Investments - unaffiliated			4
Net realized and unrealized gain (loss)				4
Change in net assets from operations			$	58,794
(a)	Affiliated income		$	-

See accompanying Notes to Financial Statements.

5

JNL Investors Series Trust (Unaudited)

Statement of Changes in Net Assets (in thousands)

For the Period Ended June 30, 2026

Operations
Net investment income (loss)		$	58,790
Net realized gain (loss)			4
Change in net assets from operations			58,794
Distributions to shareholders
From distributable earnings
	Class I		(41,580	)
	Class SL		(17,212	)
Total distributions to shareholders			(58,792	)
Share transactions1
Proceeds from the sale of shares
	Class I		22,311,472
	Class SL		13,573,712
Cost of shares redeemed
	Class I		(22,333,127	)
	Class SL		(13,538,013	)
Change in net assets from
	share transactions		14,044
Change in net assets			14,046
Net assets beginning of period			3,260,622
Net assets end of period		$	3,274,668
1Share transactions
Shares sold
	Class I		22,311,472
	Class SL		13,573,712
Shares redeemed
	Class I		(22,333,127	)
	Class SL		(13,538,013	)
Change in shares
	Class I		(21,655	)
	Class SL		35,699
Purchases and sales of long term
	investments
Purchase of securities		$	359,100
Purchase of U.S. Government securities			199,642
Total purchases		$	558,742
Proceeds from sales of securities		$	249,700
Proceeds from sales of U.S. Government
	securities		181,904
Total proceeds from sales		$	431,604

See accompanying Notes to Financial Statements.

6

JNL Investors Series Trust (Unaudited)

Statement of Changes in Net Assets (in thousands)

For the Year Ended December 31, 2025

Operations
Net investment income (loss)		$	125,521
Net realized gain (loss)			1
Change in net assets from operations			125,522
Distributions to shareholders
From distributable earnings
	Class I		(94,287	)
	Class SL		(31,233	)
Total distributions to shareholders			(125,520	)
Share transactions1
Proceeds from the sale of shares
	Class I		36,363,647
	Class SL		23,183,545
Cost of shares redeemed
	Class I		(36,323,842	)
	Class SL		(22,992,503	)
Change in net assets from
	share transactions		230,847
Change in net assets			230,849
Net assets beginning of year			3,029,773
Net assets end of year		$	3,260,622
1Share transactions
Shares sold
	Class I		36,363,647
	Class SL		23,183,545
Shares redeemed
	Class I		(36,323,842	)
	Class SL		(22,992,503	)
Change in shares
	Class I		39,805
	Class SL		191,042

See accompanying Notes to Financial Statements.

7

JNL Investors Series Trust (Unaudited)

Financial Highlights

For a Share Outstanding

Net Investment Income (Loss). Net investment income(loss) is calculated using the average shares method.

Total Return. Total return assumes reinvestment of all distributions for the period. Total return is not annualized for periods less than one year.

Income and Expense Ratios. Ratios are annualized for periods less than one year.

				Increase (decrease) from investment operations							Distributions from								Supplemental data							Ratios
Period ended		Net asset value, beginning of period($)		Net investment income (loss)($)		Net realized & unrealized gains (losses)($)		Total from investment operations($)			Net investment income($)		Net realized gains on investment transactions($)		Net asset value, end of period($)		Total return(%)		Net assets,end of period (in thousands)($)		Portfolio turnover (%)			Net expenses to average net assets(%)		Total expenses to average net assets(%)		Net investment income (loss) to average net assets(%)
Class I
06/30/26		1.00		0.02		0.00		0.02			(0.02)		-		1.00		1.76		2,300,895		N/A			0.18		0.18		3.52
12/31/25		1.00		0.04		0.00		0.04			(0.04)		-		1.00		4.17		2,322,549		N/A			0.19		0.19		4.09
12/31/24		1.00		0.05		0.00		0.05			(0.05)		-		1.00		5.13		2,282,743		N/A			0.19		0.19		5.01
12/31/23	(d)	1.00		0.03		0.00		0.03			(0.03)		-		1.00		4.92		2,436,364		N/A			0.19		0.19		4.78
12/31/22		1.00		0.01		0.00		0.01			(0.01)		-		1.00		1.31		3,095,129		N/A			0.33	(a)	0.18		1.16	(b)
12/31/21		1.00		0.00		0.00		0.00			(0.00)	(c)	-		1.00		0.01		3,605,301		N/A			0.05		0.19		0.01
Class SL
06/30/26		1.00		0.02		0.00		0.02			(0.02)		-		1.00		1.81		973,773		N/A			0.08		0.18		3.62
12/31/25		1.00		0.04		0.00		0.04			(0.04)		-		1.00		4.27		938,073		N/A			0.09		0.19		4.16
12/31/24		1.00		0.05		0.00		0.05			(0.05)		-		1.00		5.25		747,030		N/A			0.09		0.19		5.07
12/31/23	(e)	1.00		0.03		0.00		0.03			(0.03)		-		1.00		3.50		841,503		N/A			0.09		0.19		5.16

(a)	Includes payments by the Fund for the Adviser's recapture of previously waived/reimbursed fees.
(b)	The ratio for net investment income (loss) to average net assets without expense waivers or recovery of contractual expense waivers for JNL Government Money Market Fund for 2022 was 1.31%.
(c)	Amount represents less than $0.005.
(d)	Prior to May 1, 2023, the Fund offered Institutional Class shares. Effective May 1, 2023, Institutional Class shares were renamed to Class I shares.
(e)	Effective May 1, 2023, Class SL shares were offered by the Fund.

See accompanying Notes to Financial Statements.

8

JNL Investors Series Trust

Notes to Financial Statements (Unaudited)

June 30, 2026

NOTE 1. ORGANIZATION

JNL Investors Series Trust ("Trust") is an open-end management investment company organized under the laws of the Commonwealth of Massachusetts, by a Declaration of Trust, dated July 28, 2000, as amended and restated September 25, 2017. The Trust is registered with the U.S. Securities and Exchange Commission ("SEC") under the Investment Company Act of 1940, as amended ("1940 Act"), and its shares are registered under the Securities Act of 1933, as amended ("1933 Act"). The Trust operates as a series trust, and at June 30, 2026 consisted of one (1) series, JNL Government Money Market Fund (the "Fund"), which is a diversified investment company as defined in the 1940 Act. The Fund represents shares of beneficial interest in a separate portfolio of securities and other assets, with its own investment objective.

Jackson National Asset Management, LLC ("JNAM", "Adviser" or "Administrator"), an indirect, wholly owned subsidiary of Jackson Financial Inc. ("Jackson"), serves as investment adviser and administrator to the Fund.

Mellon Investments Corporation ("Sub-Adviser") serves as sub-adviser for the Fund.

No shares of the Fund are sold to retail investors, but they are available for investment by affiliated parties. Affiliated parties or Jackson owned 100% of the outstanding capital shares of the Fund at June 30, 2026.

NOTE 2. SIGNIFICANT ACCOUNTING POLICIES

The Fund is an investment company and follows accounting and reporting guidance under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 946, "Financial Services-Investment Companies". The following is a summary of significant accounting policies consistently followed by the Trust in the preparation of its financial statements in conformity with U.S. generally accepted accounting principles ("GAAP").

Security Valuation. Under the Trust's valuation policy and procedures ("Valuation Policies and Procedures"), the Trust's Board of Trustees ("Board" or "Trustees") has designated to the Adviser the responsibility for carrying out certain functions relating to the valuation of portfolio securities for the purpose of determining the net asset value ("NAV") of the Fund. The Adviser has established a Valuation Committee (the "Valuation Committee") that is charged with the responsibilities set forth in the Valuation Policies and Procedures. The Valuation Committee is responsible for determining fair valuations for any security for which market quotations are not readily available. For those securities fair valued under procedures approved by the Board, the Valuation Committee reviews and affirms the reasonableness of the fair valuation determinations after considering all relevant information that is reasonably available. The Valuation Committee's fair valuation determinations are subject to review by the Board.

The NAV of the Fund's shares is generally determined once each day on which the New York Stock Exchange ("NYSE") is open, at the close of the regular trading session of the NYSE (normally, 4:00 PM Eastern Time, Monday through Friday). However, consistent with legal requirements, calculation of the Fund's NAV may be suspended on days determined by the Board during times of NYSE market closure, which may include times during which the SEC issues policies or protocols associated with such closure pursuant to Section 22(e) of the 1940 Act. In the event that the NYSE is closed unexpectedly or opens for trading but closes earlier than scheduled, the Fund's Valuation Committee will evaluate if trading activity on other U.S. exchanges and markets for equity securities is considered reflective of normal market activity. To the extent an NYSE closure is determined to be accompanied by a disruption of normal market activity, the Valuation Committee may utilize the time the NYSE closed for purposes of measuring and calculating the Fund's NAV. To the extent an NYSE closure is determined to not have resulted in a disruption of normal market activity, the Valuation Committee may utilize the time the NYSE was scheduled to close for purposes of measuring and calculating the Fund's NAV. All securities in the Fund, as permitted by compliance with applicable provisions of Rule 2a-7 under the 1940 Act, are valued at amortized cost, unless it is determined that such practice does not approximate fair value. Debt securities are generally valued by independent pricing services approved by the Board. If pricing services are unable to provide valuations, debt securities are valued at the most recent bid quotation or an evaluated price, as applicable, obtained from the Fund's Sub-Adviser, a broker/dealer, a widely used quotation system or other approved third-party sources.

If an investment is valued at a fair value for purposes of calculating the Fund's NAV, the value may be different from the last quoted price for the investment depending on the source and method used to determine the value. Although there can be no assurance, in general, the fair value of the investment is the amount the owner of such investment might reasonably expect to receive in an orderly transaction between market participants upon its current sale.

Distributions to Shareholders. The amount and timing of distributions are determined in accordance with federal income tax regulations, which may differ from GAAP. The Fund declares dividends from net investment income daily and pays dividends monthly. Distributions of net realized capital gains, if any, are distributed by the Fund at least annually, to the extent they exceed available capital loss carryforwards.

Security Transactions and Investment Income. Security transactions are recorded on the trade date for financial reporting purposes. Realized gains and losses are determined on the specific identification basis. Dividend income, net of applicable withholding taxes, is recorded on the ex-dividend date. Interest income, including effective-yield amortization of discounts and premiums on debt securities, is accrued daily.

Expenses. Expenses are recorded on an accrual basis. Expenses of the Fund are allocated to the classes based on the average daily net assets of each class. Expenses attributable to a specific class of shares are charged to that class.

Guarantees and Indemnifications. In the normal course of business, the Trust may enter into contracts that contain a variety of representations which provide general indemnifications for certain liabilities. Under the Trust's organizational documents, its officers and Trustees are indemnified against certain liabilities arising out of the performance of their duties to the Fund. However, since its commencement of operations, the Fund has not had claims or

9

JNL Investors Series Trust

Notes to Financial Statements (Unaudited)

June 30, 2026

losses pursuant to its contracts. The Fund's maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined and the Fund has no historical basis for predicting the likelihood of any such claims.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates.

NOTE 3. FAIR VALUE MEASUREMENT

FASB ASC Topic 820 establishes a single authoritative definition of fair value, sets out a framework for measuring fair value and requires additional disclosures about fair value measurements. Various inputs are used in determining the value of the Fund's investments under this guidance. The inputs are summarized into three broad categories:

Level 1 includes quoted prices (unadjusted) in active markets for identical investments that the Fund can access at the measurement date.

Level 2 includes other significant observable inputs (including fair value factors, quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.).

Level 3 includes significant unobservable inputs, to the extent observable inputs are not available, including the Adviser's own assumptions in determining the fair value of investments.

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following table summarizes the Fund's investments in securities and other financial instruments (in thousands) as of June 30, 2026 by valuation level.

	Level 1 ($)		Level 2 ($)		Level 3 ($)		Total ($)
Assets - Securities
Government And Agency Obligations	-		1,808,070		-		1,808,070
Repurchase Agreements	-		1,420,000		-		1,420,000
	-		3,228,070		-		3,228,070

Significant changes in unobservable valuation inputs to a different amount might result in a significantly higher or lower fair value measurement than the one used in a security's valuation. There were no significant transfers into or out of Level 3 for the period. There were no significant Level 3 valuations for which unobservable valuation inputs were developed at June 30, 2026.

NOTE 4. SECURITIES AND OTHER INVESTMENTS

U.S. Government Agencies or Government Sponsored Enterprises. The Fund may invest in U.S. Government agencies or government sponsored enterprises. U.S. Government securities are obligations of, and in certain cases, guaranteed by, the U.S. Government, its agencies or instrumentalities. Some U.S. Government securities, such as Treasury bills, notes and bonds, and securities guaranteed by the Government National Mortgage Association, are supported by the full faith and credit of the U.S. Government; others, such as those of the Federal Home Loan Banks ("FHLBanks"), are supported by the right of the issuer to borrow from the U.S. Department of the Treasury ("U.S. Treasury"); others, such as those of the Federal National Mortgage Association ("Fannie Mae"), are supported by the discretionary authority of the U.S. Government to purchase the agency's obligations; and still others, such as those of the Student Loan Marketing Association, are supported only by the credit of the instrumentality. U.S. Government securities may include zero coupon securities, which do not distribute interest on a current basis and tend to be subject to greater risk than interest paying securities of similar maturities.

Although many types of U.S. Government securities may be purchased by the Fund, such as those issued by Fannie Mae, the Federal Home Loan Mortgage Corporation, the FHLBanks, and other entities chartered or sponsored by Acts of Congress, their securities are neither issued nor guaranteed by the U.S. Treasury and, therefore, are not backed by the full faith and credit of the United States. The U.S. Government may choose not to provide financial support to U.S. Government sponsored agencies or instrumentalities if it is not legally obligated to do so, in which case, if the issuer defaulted, the holder of the securities of such issuer might not be able to recover its investment from the U.S. Government.

Repurchase Agreements. The Fund may invest in repurchase agreements. In a repurchase agreement, the Fund receives debt securities (collateral) subject to an obligation of the seller to repurchase, and the Fund to resell, the securities at an agreed upon price and date. The underlying securities used as collateral for repurchase agreements may be held in safekeeping by the Fund's Custodian or designated sub-custodians under triparty repurchase agreements. Earnings on collateral and compensation to the seller are based on agreed upon rates between the seller and the Fund. Interest earned on repurchase agreements is recorded as interest income to the Fund. In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of such collateral may decline.

NOTE 5. PRINCIPAL RISKS

Market and Volatility Risk. In the normal course of business, the Fund trades financial instruments and enters into financial transactions where the risk of potential loss exists due to changes in the market ("market risk"). Additionally, prices of financial instruments may fluctuate over short periods or extended periods of time in response to company, market, economic or political news ("volatility risk"). Equity securities generally have more price volatility than fixed-income securities, and long term fixed-income securities normally have more price volatility than short term fixed-income securities.

10

JNL Investors Series Trust

Notes to Financial Statements (Unaudited)

June 30, 2026

Concentration Risk. To the extent that the Fund focuses on particular countries, regions, industries, sectors, issuers, types of investment or a limited number of securities from time to time, the Fund may be subject to greater risks of adverse economic, business or political developments in such areas of focus than a fund that invests in a wider variety of countries, regions, industries, sectors or investments.

Interest Rate Risk. When interest rates increase, fixed-income securities generally will decline in value. A wide variety of factors can cause interest rates to rise such as central bank monetary policies, inflation rates and general economic conditions. Fixed-income securities with longer durations tend to be more sensitive to changes in interest rates than those with shorter durations.

Prepayment Risk. During periods of falling interest rates, there is the risk that a debt security with a high stated interest rate will be prepaid before its expected maturity date and that the Fund may have to reinvest the proceeds in an investment that may have a lower interest rate. In addition, prepayment rates are difficult to predict and the potential impact of prepayment on the price of a debt instrument depends on the terms of the instrument.

Credit and Counterparty Risk. In the normal course of business, the Fund trades financial instruments and enters into financial transactions where the risk of potential loss exists due to failure of the other party to a transaction to perform ("credit risk"). Bonds and other debt securities are subject to credit risk, which is the possibility that the credit strength of an issuer will weaken and/or an issuer of a debt security will fail to make timely payments of principal or interest and the security will go into default. Similar to credit risk, the Fund may be exposed to counterparty risk, or the risk that an institution or other entity with which the Fund has unsettled, or open transactions will default. Financial assets, which potentially expose the Fund to credit risk, consist principally of investments and cash due from counterparties ("counterparty risk"). The extent of the Fund's exposure to credit and counterparty risks in respect to these financial assets is incorporated within its carrying value as recorded in the Fund's Statement of Assets and Liabilities. For certain derivative contracts, the potential loss could exceed the value of the financial assets recorded in the financial statements.

Artificial Intelligence Risk. Recent technological developments in, and the increasingly widespread use of, Artificial Intelligence ("AI") Technologies may pose risks to the Fund. For instance, the economy may be significantly impacted by the advanced development and increased regulation of AI Technologies. As AI Technologies are used more widely, the profitability and growth of Fund holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which AI Technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.

Cybersecurity Risk. Cyber-attacks could disrupt daily operations related to trading and portfolio management. In addition, technology disruptions and cyber-attacks may impact the operations or securities prices of an issuer or a group of issuers, and thus may have an adverse impact on the value of the Fund's investments. Cyber-attacks on the Fund, the Sub-Adviser or a service provider could cause business failures or delays in daily processing and the Fund may need to delay transactions, consistent with regulatory requirements, as a result and could impact the performance of the Fund. The rapid development and increasingly widespread use of artificial intelligence, including machine learning technology and generative artificial intelligence, could exacerbate these risks or result in cybersecurity incidents that implicate personal data.

Market Disruption and Geopolitical Risk. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Due to the increasing interdependence among global economies and markets, conditions in one country, market, or region might adversely impact markets, issuers and/or foreign exchange rates in other countries. Political disruptions, terrorism, armed conflicts, tariffs or the threat of tariffs, other restrictions on trade or economic sanctions, global health crises and pandemics, and geopolitical events have led, and in the future may lead, to increased market volatility and may have adverse short- or long-term effects on U.S. and world economies and markets generally. For example, the prolonged armed conflicts between Russia and Ukraine in Europe and among Israel, Iran, Hamas and other militant groups in the Middle East, and potential conflict between China and Taiwan (including if China were to attempt unification of Taiwan by force) may adversely affect the value of the Fund's investments. In addition, the Iranian conflict that commenced in February 2026 may result in market disruptions, including declines in regional and global stock markets, unusual volatility in global commodity markets and significant devaluations in currency. Escalation of hostilities in the Middle East could disrupt energy production or transportation, including through key shipping routes, which may lead to increased volatility in energy and other commodity prices. The extent and duration of this conflict is impossible to predict. Natural and environmental disasters and systemic market dislocations are also highly disruptive to economies and markets. Those events as well as other changes in non-U.S. and domestic economic, social, and political conditions also could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, credit ratings, inflation, investor sentiment, and other factors affecting the value of the Fund's investments and the Fund. Any of these occurrences could disrupt the operations of the Fund and of the Fund's service providers.

NOTE 6. INVESTMENT TRANSACTION AGREEMENTS AND COLLATERAL

Under various agreements, certain investment transactions require collateral to be pledged to or from the Fund and a counterparty or segregated at the custodian and the collateral is managed pursuant to the terms of the agreement. U.S. Treasury Bills and U.S. dollars are generally the preferred forms of collateral, although other forms of high quality or sovereign securities may be used. Securities held by the Fund that are used as collateral are identified as such within the Schedule of Investments.

Master Netting Agreements ("Master Agreements"). The Fund is subject to various Master Agreements, which govern the terms of certain transactions and mitigate the counterparty risk associated with relevant transactions by specifying credit protection mechanisms and providing standardization that improves legal certainty. Because different types of financial transactions have different mechanics and are sometimes traded out of different legal entities of a particular counterparty organization, each type of transaction may be covered by a different Master Agreement, potentially resulting in the need for multiple agreements with a single counterparty. The Fund may net exposure and collateralize multiple transaction types governed by the same Master Agreement with the same counterparty and may close out and net its total exposure to a counterparty in the event of a default and/or termination event with respect to all the transactions governed under a single agreement with a counterparty. Each Master Agreement defines whether the Fund is

11

JNL Investors Series Trust

Notes to Financial Statements (Unaudited)

June 30, 2026

contractually able to net settle daily payments. Additionally, certain circumstances, such as laws of a particular jurisdiction or settlement of amounts due in different currencies, may prohibit or restrict the right of offset as defined in the Master Agreements.

Master Agreements also help limit credit and counterparty risk by specifying collateral posting arrangements at pre-arranged exposure levels. Under the Master Agreements, collateral is routinely transferred if the total net exposure to certain transactions (net of existing collateral) governed under the relevant master agreement with a counterparty in a given account exceeds a specified threshold depending on the counterparty and the type of Master Agreement. The Fund's overall exposure to counterparty risk can change substantially within a short period, as it is affected by each transaction subject to the relevant Master Agreement. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty non-performance. The Fund's Sub-Adviser attempts to limit counterparty risk by only entering into Master Agreements with counterparties that the Sub-Adviser believes to have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Master Repurchase Agreements and Global Master Repurchase Agreements (individually and collectively "Master Repo Agreements"). Master Repo Agreements govern repurchase, reverse repurchase and Treasury roll transactions between a Fund and select counterparties. The Master Repo Agreements maintain provisions for, among other things, initiation and confirmation, income payments and transfer, events of default, termination, and maintenance of collateral. In the event of default, the total value exposure will be offset against collateral exchanged to date, which would result in a net receivable/(payable) that would be due from/to the counterparty. Securities purchased under repurchase agreements are reflected as an asset on a Fund's Statement of Assets and Liabilities. The value of repurchase agreements and collateral pledged or received by a counterparty are disclosed in the Schedule of Investments. The Fund's net exposure to the counterparty is determined by the amount of any excess or shortfall in collateral compared to the value of the repurchase agreement.

NOTE 7. INVESTMENT ADVISORY FEES AND TRANSACTIONS WITH AFFILIATES

Advisory Fee. The Trust has an investment advisory and management agreement with JNAM, whereby JNAM provides investment management services. The Fund pays JNAM an annual fee, accrued daily and paid monthly, based on a specified percentage of the average daily net assets of the Fund. A portion of this fee is paid by JNAM to the Sub-Adviser as compensation for its services. The Fund is obligated to pay JNAM an annual rate of 0.09% for net assets up to $1 billion, 0.08% for net assets between $1 billion and $3 billion, 0.07% for net assets between $3 billion and $5 billion and 0.06% for net assets over $5 billion.

Administrative Fee. JNAM also serves as the Administrator to the Fund. JNAM provides or procures most of the necessary administrative functions and services for the operations of the Fund. The Fund pays JNAM an annual fee, accrued daily and paid monthly, based on a specified percentage of the average daily net assets of the Fund. The Fund is obligated to pay JNAM an annual rate of 0.10% for net assets up to $3 billion, 0.09% for net assets between $3 billion and $5 billion and 0.08% for net assets over $5 billion. Pursuant to a contractual waiver agreement, JNAM has agreed to waive 100% of its administrative fees for Class SL shares of the Fund. None of the waived administrative fees can be recaptured by JNAM. In accordance with the administration agreement, JNAM, at its own expense, arranges for legal, audit, fund accounting, transfer agency, custody (except overdraft and interest expense), printing and mailing, a portion of the Chief Compliance Officer costs, and all other services necessary for the operation of the Fund. The Fund is responsible for trading expenses including brokerage commissions, interest and taxes, other non-operating expenses, registration fees, licensing costs, directors and officers insurance, the fees and expenses of the disinterested Trustees ("Independent Trustees") and independent legal counsel to the Independent Trustees and a portion of the costs associated with the Chief Compliance Officer.

Deferred Compensation Plan. The Fund adopted a Deferred Compensation Plan whereby an Independent Trustee may defer the receipt of all or a portion of their compensation. These deferred amounts, which remain as liabilities of the Fund, are treated as if invested in shares of one or more investment options at the discretion of the applicable Independent Trustee. These amounts represent general, unsecured liabilities of the Fund and vary according to the total returns of the selected funds. Liabilities related to deferred balances are included in Payable for Board of trustee fees in the Statement of Assets and Liabilities. Increases or decreases related to the changes in value of deferred balances are included in Board of trustee fees set forth in the Statement of Operations.

NOTE 8. INCOME TAX MATTERS

The Fund is treated as a separate tax payer for federal income tax purposes. The Fund intends to continue to qualify as a regulated investment company ("RIC") and to distribute substantially all net investment income and net capital gains, if any, to its shareholders and otherwise comply with Subchapter M of the Internal Revenue Code of 1986, as amended, applicable to RICs. Therefore, no federal income tax provision is required. The Fund may also fully or partially satisfy its distribution requirements by using consent dividends rather than cash dividends. Consent dividends are authorized by Jackson, and the distributions are treated as if they were paid in cash for tax purposes only. Under current tax law, interest, dividends and capital gains paid by the Fund are not currently taxable to shareholders when left to accumulate within a variable annuity contract or variable life insurance policies.

As of June 30, 2026, the cost of investments and the components of net unrealized appreciation (depreciation) (in thousands) for federal income tax purposes were as follows:

		Tax Cost of Investments($)		Gross Unrealized Appreciation($)		Gross Unrealized Depreciation($)		Net Unrealized Appreciation (Depreciation)($)
		3,228,070		52		(52	)	-

The tax character of distributions paid by the Fund (in thousands) during the Fund's fiscal year ended December 31, 2025 was as follows:

12

JNL Investors Series Trust

Notes to Financial Statements (Unaudited)

June 30, 2026

	Net Ordinary Income*($)		Long-term Capital Gain($)		Return of Capital($)
	127,358		-		-

* Net ordinary income consists of net taxable income derived from dividends, interest and net short-term capital gains, if any.

The Fund files U.S. federal and various state and local tax returns. The Fund's federal tax returns are generally subject to examination for a period of three fiscal years after the date they are filed. State and local tax returns may be subject to examination for an additional period of time depending on the jurisdiction. Management completed an evaluation of the Fund's tax positions taken for all open tax years and based on that evaluation, determined that no provision for federal income tax was required in the Fund's financial statements during the period ended June 30, 2026.

NOTE 9. SEGMENT REPORTING

The Fund's President and Chief Executive Officer is the Fund's Chief Operating Decision Maker ("CODM"). The Fund operates as a single reportable segment, which reflects how the CODM monitors and manages the operating results of the Fund. The CODM manages the allocation of resources in accordance with the Fund's objective and the terms of its prospectus and evaluates total return of the Fund versus its comparative benchmarks. The Adviser or Sub-Adviser implements the investment objective and program by selecting securities and determining asset allocation ranges. The financial information used by the CODM to assess the segment's performance and to allocate resources, including total return, expense ratios, changes in net assets from operations and portfolio composition is consistent with that presented within the Fund's financial statements and financial highlights. Segment assets are reflected on the accompanying Statement of Assets and Liabilities as Total Assets and significant segment expenses are listed on the accompanying Statement of Operations.

NOTE 10. SUBSEQUENT EVENTS

Management has evaluated subsequent events for the Fund through the date the financial statements are issued and has concluded there were no events that require adjustments to the financial statements or disclosure in the notes to financial statements.

13

JNL Investors Series Trust

Additional Disclosures (Unaudited)

June 30, 2026

Proxy Voting Policies and Procedures and Proxy Voting Record. A description of the Policy that the Fund's Adviser (and Sub-Adviser) used to vote proxies relating to portfolio securities and additional information on how the Fund voted any proxies relating to portfolio securities during the 12-month period ended June 30, 2026, are available without charge (1) by calling 1-800-392-2909; (2) on Jackson National Life Insurance Company's or Jackson National Life Insurance Company of New York's website at www.jackson.com; and (3) by visiting the SEC's website at www.sec.gov.

14

Form N-CSR Item 8: Changes in and Disagreements with Accountants:

Not Applicable

Form N-CSR Item 9: Matters Submitted for Shareholder Vote:

Not Applicable

Form N-CSR Item 10: Remuneration Paid to Directors, Officers and Others

Included within the Statement of Operations of the financial statements.

Form N-CSR Item 11: Statement Regarding Basis for Approval of Investment Advisory Contract:

Not Applicable

15

Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies.

Included as part of the financial statements filed under Item 7.

Item 9. Proxy Disclosures for Open-End Management Investment Companies.

Included as part of the financial statements filed under Item 7.

Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies.

Included as part of the financial statements filed under Item 7.

Item 11. Statement Regarding Basis for Approval of Investment Advisory Contract.

Included as part of the financial statements filed under Item 7.

Item 12. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 13. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 14. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 15. Submission of Matters to a Vote of Security Holders.

No material changes have been made.

Item 16. Controls and Procedures.

(a) The registrant maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed in the registrant's filings under the Securities Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as amended, is recorded, processed, summarized, and reported within the periods specified in the rules and forms of the U.S. Securities and Exchange Commission. Such information is accumulated and communicated to the registrant's management, including its principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. The registrant's management, including the principal executive officer and the principal financial officer, recognizes that any set of controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.

Within ninety (90) days prior to the filing date of this report on Form N-CSR, the registrant had carried out an evaluation, under the supervision and with the participation of the registrant's management, including the registrant's principal executive officer and the registrant's principal financial officer, of the effectiveness of the design and operation of the registrant's disclosure controls and procedures. Based on such evaluation, the registrant's principal executive officer and principal financial officer concluded that the registrant's disclosure controls and procedures are effective.

(b) There have been no significant changes in the registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) during the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal controls over financial reporting. There have been no significant changes in the registrant's internal controls or in other factors that could significantly affect the internal controls subsequent to the date of their evaluation in connection with the preparation of this report on Form N-CSR.

Item 17. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 18. Recovery of Erroneously Awarded Compensation.

Not applicable.

Item 19. Exhibits.

(a)	(1) Not applicable to the semi-annual filing.
	(2) Not applicable.
	(3) The certifications required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended, are attached hereto.
	(4) Not applicable.
	(5) Not applicable.
(b)	The certification required by Rule 30a-2(b) under the Investment Company Act of 1940, as amended, is attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	JNL Investors Series Trust
By:	/s/ Mark D. Nerud
	Mark D. Nerud
	Principal Executive Officer
Date:	September 2, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as amended, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/ Mark D. Nerud
	Mark D. Nerud
	Principal Executive Officer
Date:	September 2, 2026
By:	/s/ Garett J. Childs
	Garett J. Childs
	Principal Financial Officer
Date:	September 2, 2026

EXHIBIT LIST

Exhibit 19(a)(3)	Certification of the Principal Executive Officer required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended.
	Certification of the Principal Financial Officer required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended.
Exhibit 19(b)	Certification required by Rule 30a-2(b) under the Investment Company Act of 1940, as amended.