QuickLinks -- Click here to rapidly navigate through this document

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
PURSUANT TO SECTION 12(b) OR 12(g) OF THE
SECURITIES EXCHANGE ACT OF 1934

PROSPECT ACQUISITION CORP.
(Exact Name of Registrant as Specified in its Charter)

Delaware
(State of Incorporation
or Organization)		   26-0508760
(I.R.S. Employer
Identification No.)

695 East Main Street, Stamford CT
(Address of Principal Executive Offices)
 
06901
(Zip Code)

Securities to be registered pursuant to Section 12(b) of the Act:

Title of Each Class
to be so Registered
   Name of Each Exchange on Which
Each Class is to be Registered
Units, each consisting of one share of Common Stock and one Warrant   AMEX

Common Stock, par value $0.0001 per share
 
AMEX

Warrants, exercisable for Common Stock at an exercise price of $7.50 per share
 
AMEX

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), please check the following box. ý
 
If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), please check the following box. o

Securities Act registration statement file number to which this form relates: 333-145110 (if applicable)

Securities to be registered pursuant to Section 12(g) of the Act:

NONE
(Title of Class)


ITEM 1.    DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED.

        The securities to be registered hereby are the units, common stock and warrants of Prospect Acquisition Corp. (the "Company"). The description of the units, common stock and warrants contained in the section entitled "Description of Securities" in the prospectus included in the Company's Registration Statement on Form S-1 (File No. 333-145110), filed with the Securities and Exchange Commission on August 3, 2007, as amended from time to time (the "Registration Statement"), is hereby incorporated by reference herein. Any form of prospectus or prospectus supplement to the Registration Statement that includes such descriptions and that are subsequently filed are hereby also incorporated by reference herein.


ITEM 2.    EXHIBITS.

Exhibit No.
   Description
3.1   Amended and Restated Certificate of Incorporation*

3.2
 
Bylaws*

4.1
 
Specimen Unit Certificate*

4.2
 
Specimen Common Stock Certificate*

4.3
 
Specimen Warrant Certificate*

4.4
 
Form of Warrant Agreement between Continental Stock Transfer & Trust Company and the Registrant*
*
Incorporated by reference to the corresponding exhibit filed with the Registration Statement, SEC File No. 333-145110.

2


SIGNATURES

        Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized.

    PROSPECT ACQUISITION CORP.

 
 
By:
/s/  DAVID A. MINELLA      
David A. Minella
Chairman of the Board and Chief Executive Officer

Date: November 13, 2007

3



QuickLinks

SIGNATURES