Osprey Bitcoin Trust (Nasdaq: OBTC) refreshes Bitcoin risk and fee disclosures

As filed with the Securities and Exchange Commission on September 10, 2026.

Registration Statement No. 333-289334

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1

TO

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

OSPREY BITCOIN TRUST

(Exact name of Registrant as specified in its charter)

777 Brickell Avenue

Suite 500

Miami, FL 33131

(914) 214-4697

(Address, including Zip Code, and Telephone Number, including Area Code, of Registrant’s Principal Executive Offices)

Gregory D. King

Chief Executive Officer

Osprey Funds, LLC

777 Brickell Avenue

Suite 500

Miami, FL 33131

(914) 214-4697

Copies to:

Erin E. Martin

Rahul K. Patel

Morgan, Lewis & Bockius LLP

1111 Pennsylvania Avenue NW

Washington, DC 20004

(202) 739-3000

Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐