$FHTX

$2.05 +$0.00 (0.0%) Close

$FHTX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 59.4M shares outstanding

Who owns FHTX?

By type of holder

Institutions 75.7% Insiders 2.3% Everyone else 22.1%

Concentration Top 10 holders own 80.0%

Flagship Pioneering, LLC 21.3% · Flagship Ventures Fund V, L.P. 15.7%

Institutional ownership

75.7%

+0.8 pts vs last qtr

Institutional holders

102

-3 vs last qtr

Net shares bought

+482.9K

by institutions in Q2 2026

New / sold out

14 / 17

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +262.0K
Qube Research & Technologies Ltd +122.0K

Biggest sellers in Q2 2026

FMR LLC −341.2K
Sio Capital Management, LLC SOLD OUT −122.9K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Foghorn Therapeutics Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+470.1%

+41.64% a year

Each share's claim on the business

−82.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $64.2M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years61% 3–5 years1% 1–3 years33% Under 1 year5%

Quarterly turnover

2.7%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting FHTX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
FP Flagship Pioneering, LLC	12.7M	21.34%	Unchanged	≤2021	4.0%
Shares held by quarter Peak holding12.7M (Q3'24) Change over 8 quarters0 Share of the company21.340% Flagship Pioneering, LLC's full portfolio →
F FMR LLC	5.7M	9.61%	−341.2K (−5.6%)	≤2021	0.0%
Shares held by quarter Peak holding6.3M (Q3'24) Change over 8 quarters−628.0K Share of the company9.610% FMR LLC's full portfolio →

Flagship Pioneering, LLC

12.7M

% of company

21.34%

Change vs last qtr

Unchanged

Held since

≤2021

FMR LLC

5.7M

% of company

9.61%

Change vs last qtr

−341.2K (−5.6%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Foghorn Therapeutics Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting FHTX on Form N-PORT; together they hold 13.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FG Fidelity Growth Company Fund Fidelity Mt. Vernon Street Trust	$10.5M	1.8M	3.09%	0.01%	August 31, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$5.01M	1.0M	1.73%	0.00%	June 30, 2026

Fidelity Growth Company Fund

Fidelity Mt. Vernon Street Trust

Position value

$10.5M

% of company

3.09%

% of the fund

0.01%

As of

August 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$5.01M

% of company

1.73%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Foghorn Therapeutics Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FV Flagship Ventures Fund V, L.P. 5%+ holder 13D · 15.9%	9.3M	15.71%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company15.710% Disclosed stake13D · 15.9% View the 13D/G filing →
GA Gottschalk Adrian Insider	1.3M	2.27%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.270% Gottschalk Adrian's insider activity →

Flagship Ventures Fund V, L.P.

5%+ holder13D · 15.9%

9.3M

% of company

15.71%

Change vs last qtr

—

Held since

—

Gottschalk Adrian

Insider

1.3M

% of company

2.27%

Change vs last qtr

—

Held since

—

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