13D Filing: Capital Point Partners Reaches Agreement with Princeton Capital Corp (PIAC)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

Princeton
Capital Corporation

(Name of Issuer)

Common Stock, $0.001 Par Value

(Title of Class of Securities)

741865 109

(CUSIP
Number)

Mark S. DiSalvo

Sema4, Inc.

800 Turnpike
Street, Suite 300

North Andover, MA 01845

978-794-3366

(Name,
Address and Telephone Number of Person Authorized to Receive Notices and Communications)

January 19, 2016

(Date of Event Which Requires Filing of This Statement)

If the filing
person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for
other parties to whom copies are to be sent.

*	The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page
shall not be deemed to be “filed” for the purpose of section 18 of the Securities Exchange Act of 1934 (the “Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other
provisions of the Act (however, see the Notes).