Initial Statement of Beneficial Ownership (Form 3)

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Young Bracebridge H Jr 2. Date of Event Requiring Statement (Month/Day/Year) 09/29/2025 3. Issuer Name and Ticker or Trading Symbol BTC Development Corp. [BDCI] (Last) (First) (Middle) 2929 ARCH STREET, SUITE 1703 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President, CEO and Director 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) PHILADELPHIA, PA 19104 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Class A Ordinary Shares 512,500(1)(2) I By BTC Development Sponsor LLC(3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Ordinary Shares	(4)	(4)	Class A Ordinary Shares	4,590,334(2)(8)	(4)	I	By BTC Development Sponsor LLC(3)
Warrants	(5)	(6)	Class A Ordinary Shares	128,125(2)(7)	$11.5	I	By BTC Development Sponsor LLC(3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Young Bracebridge H Jr 2929 ARCH STREET, SUITE 1703 PHILADELPHIA, PA 19104	X	X	President, CEO and Director

Signatures

/s/ Bracebridge H. Young, Jr.		09/30/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These shares underlie 512,500 units of the issuer that BTC Development Sponsor LLC has irrevocably committed to purchase.
(2)	The reporting person disclaims beneficial ownership of these securities, except to the extent of her pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for any other purpose.
(3)	These shares are held directly by one of the issuer's sponsors, BTC Development Sponsor LLC, which is managed by the reporting person.
(4)	The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the issuer's initial business combination, or at any time and from time to time at the option of the holder, on a one-for-one basis, subject to certain adjustments described in the issuer's charter documents and have no expiration date.
(5)	The warrants will become exercisable at the later of 30 days after the consummation of the issuer's initial business combination or 12 months from the completion of the issuer's initial public offering.
(6)	The warrants will expire five years after the consummation of the issuer's initial business combination or earlier upon redemption of all of the issuer's outstanding Class A ordinary shares or the issuer's liquidation.
(7)	These warrants underlie 512,500 units of the issuer that BTC Development Sponsor LLC has irrevocably committed to purchase.
(8)	Includes up to 1,100,000 shares that are subject to forfeiture in the event the underwriters of the issuer's initial public offering do not exercise in full their over-allotment option.

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