Company: PRTC
Filing Date: 2025-08-28
Form Type: 6-K
Source: 0001628280-25-041238
Chunk: 0

Company: PureTech Health plc
Filing Date: 2025-08-28
Form: 6-K
Chunk 0
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### UNITED STATES

### 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 June 2025

#### Commission File Number 001-39670
<div align='center'>PURETECH HEALTH PLC

(Translation of registrant’s name into English)</div>

#### 6 Tide Street, Suite 400

#### Boston, Massachusetts 02210
<div align='center'>(Address of principal executive offices)</div>

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

<div align='center'>Form 20-F ☒ Form 40-F ☐</div>

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): o

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): o

#### INFORMATION CONTAINED IN THIS REPORT ON FORM 6-K
On August 28, 2025, PureTech Health plc (LSE: PRTC, Nasdaq: PRTC) (the “Company”) issued a press release containing its half-year report and associated interim financial review and financial statements.

The press release is furnished herewith as Exhibit 99.1, the interim management report and financial review for the six months ended June 30, 2025 and 2024 are furnished herewith as Exhibit 99.2, and the unaudited condensed consolidated financial statements as of and for the six months ended June 30, 2025, and 2024, and as of December 31, 2024, are furnished herewith as Exhibit 99.3.

#### Exhibits
| 99.1 
 99.2 |     | Press Release of PureTech Health plc, dated August 28, 2025, titled "PureTech Health plc – Half-Year Report"                                
 Interim Management Report and Financial Review for the Six Months Ended June 30, 2025 and 2024                                              |
|:-----|:----|:--------------------------------------------------------------------------------------------------------------------------------------------|
| 99.3 |     | Unaudited Condensed