PRTC PureTech Health PLC

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 under

the Securities Exchange Act of 1934

For the month of July 2021

Commission File Number 001-39670

PURETECH HEALTH PLC

6 Tide Street, Suite 400

Boston, Massachusetts 02210

Attention: Chief Executive Officer

(617) 482-2333

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K

On July 19, 2021, PureTech Health plc (LSE: PRTC, Nasdaq: PRTC) issued a press release announcing that its founded entity, Gelesis, plans to become a publicly traded company via a merger with Capstar Special Purpose Acquisition Corp. The press release is furnished herewith as Exhibit 99.1 and is incorporated by reference herein.