# Peter Barrett

Peter Barrett of Palo Alto, CA appears across SEC filings — Form ADV advisers, Form D, Reg A, and crowdfunding offerings. 29 filing roles across Form D (27), Form ADV (2).

## Filings (29)

| Filed | Source | Entity | Role | Location |
| --- | --- | --- | --- | --- |
| 2025-03-27 | Form ADV | [ATLAS VENTURE ADVISORS, INC.](https://search.stillhousedata.com/firm/162935) | SHAREHOLDER, DIRECTOR, VICE PRESIDENT | BOSTON, MA |
| 2026-01-06 | Form ADV | [PLAYGROUND GLOBAL, LLC](https://search.stillhousedata.com/firm/226570) | MANAGING DIRECTOR OF PLAYGROUND GLOBAL, LLC AND PLAYGROUND VENTURES GP, LLC | PALO ALTO, CA |
| 2009-06-10 | Form D | [Vitae Pharmaceuticals, Inc](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1157602&type=&dateb=&owner=include&count=40) | Director | FORT WASHINGTON, PA |
| 2009-10-27 | Form D | [Sirion Holdings, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1355015&type=&dateb=&owner=include&count=40) | Director | Tampa, FL |
| 2015-08-07 | Form D | [JenaValve Technology Inc](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1377801&type=&dateb=&owner=include&count=40) | Director | IRVINE, CA |
| 2020-06-10 | Form D | [ZAFGEN, INC.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1374690&type=&dateb=&owner=include&count=40) | Director | CAMBRIDGE, MA |
| 2010-02-04 | Form D | [MOLECULAR BIOMETRICS INC](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1448053&type=&dateb=&owner=include&count=40) | Director | NORWOOD, MA |
| 2011-01-25 | Form D | [Stromedix Inc](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1393680&type=&dateb=&owner=include&count=40) | Director | CAMBRIDGE, MA |
| 2019-06-18 | Form D | [SYNLOGIC, INC.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1527599&type=&dateb=&owner=include&count=40) | Director | CAMBRIDGE, MA |
| 2015-02-04 | Form D | [Mnemosyne Pharmaceuticals Inc](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1542171&type=&dateb=&owner=include&count=40) | Director | PROVIDENCE, RI |
| 2017-06-07 | Form D | [INFACARE PHARMACEUTICAL CORP](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1174264&type=&dateb=&owner=include&count=40) | Director | TREVOSE, PA |
| 2017-05-26 | Form D | [SYNLOGIC, INC.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1614170&type=&dateb=&owner=include&count=40) | Director | CAMBRIDGE, MA |
| 2014-12-18 | Form D | [Atlas Venture Fund X, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1628098&type=&dateb=&owner=include&count=40) | Executive Officer | CAMBRIDGE, MA |
| 2018-07-26 | Form D | [SubPac, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1658936&type=&dateb=&owner=include&count=40) | Director | Palo Alto, CA |
| 2016-02-26 | Form D | [Synlogic, LLC](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1667986&type=&dateb=&owner=include&count=40) | Director | CAMBRIDGE, MA |
| 2017-09-18 | Form D | [Bingham Natural Wines, LLC](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1712814&type=&dateb=&owner=include&count=40) | Director | SUNNYSIDE, NY |
| 2017-12-08 | Form D | [Obsidian Therapeutics, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1723046&type=&dateb=&owner=include&count=40) | Executive Officer | CAMBRIDGE, MA |
| 2021-06-16 | Form D | [Playground Compute, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1861451&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2021-05-19 | Form D | [Artificial, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1862742&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2021-07-15 | Form D | [Mosaic ML, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1872855&type=&dateb=&owner=include&count=40) | Director | San Francisco, CA |
| 2021-07-08 | Form D | [Anjuna Security, Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1870313&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2022-02-10 | Form D | [Playground Ventures III, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1859529&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2022-06-14 | Form D | [Playground Ventures Affiliates III, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1918729&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2026-07-02 | Form D | [Playground Ventures IV, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=2043278&type=&dateb=&owner=include&count=40) | Related Person | PALO ALTO, CA |
| 2025-05-30 | Form D | [Playground Helix, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1936736&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2025-05-30 | Form D | [PsiQuantum, Corp.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=2070804&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2025-07-08 | Form D | [Playground Omega, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=2069677&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2025-08-11 | Form D | [xLight Inc.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=2029820&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |
| 2025-07-08 | Form D | [Playground Omega 2, L.P.](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=2072280&type=&dateb=&owner=include&count=40) | Director | PALO ALTO, CA |


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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.