FHTX

Foghorn Therapeutics Inc.

Pharmaceutical PreparationsNasdaq<br>Emerging growth company

Total Trades

4

Buys

0

Sells

2

Largest Trade

$1M+

Insiders

2

Institutional Funds

58

Inst. Value

$1M+

Activist Filings

7

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Costa CarlosChief People OfficerEXERCISE$100K–$500K37K$3.72Sep 24, 2024
Costa CarlosChief People OfficerSELL$100K–$500K37K$10.04Sep 24, 2024
Agresta SamuelChief Medical Offi…EXERCISE$1M+311K$3.72Aug 18, 2023
Agresta SamuelChief Medical Offi…SELL$1M+311K$8.25Aug 18, 2023
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Institutional Ownership

13F filings as of Dec 31, 2025 · 58 funds holding

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Flagship Ventures Fund V, L.P.

SC 13D/A · Jan 13, 2026

15.9%

9.3M shares

FMR LLC

SC 13G/A · Feb 12, 2025

10.2%

5.7M shares

The Klarman Family Foundation

SC 13G/A · Oct 8, 2024

3.9%

2.1M shares

Deerfield Mgmt, L.P.

SC 13G · Sep 20, 2024

5.3%

2.9M shares

FMR LLC

SC 13G/A · Jun 10, 2024

11.4%

6.3M shares

Biotechnology Value Fund, L.P.

SC 13G · May 30, 2024

5.5%

3.0M shares

Flagship Ventures Fund V, L.P. (2)

SC 13D/A · May 24, 2024

16.9%

9.3M shares

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