What does CUSIP 359616109 represent in this 13F holders report?

CUSIP 359616109 is the security identifier for FULC - Fulcrum Therapeutics, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held FULC - Fulcrum Therapeutics, Inc. - Common Stock in Q4 2025?

173 institutional investors reported FULC - Fulcrum Therapeutics, Inc. - Common Stock for Q4 2025. Use the holders table for investor-level position and value details.

Fulcrum Therapeutics, Inc. - Common Stock (FULC)

CUSIP: 359616109

Q4 2025 13F Holders as of 31 Dec 2025

Security type / class: Equity / Common Stock
Total 13F shares: 67,444,423
Total 13F value: $762,744,189
Share change: +11,821,898
Put/Call ratio: 94%
SEC-reported price per share: $11.31
Number of holders: 173
Value change: +$134,984,797
Number of buys: 100
Number of sells: 63
Shares outstanding: 66,688,403

Security key

359616109

Report period

Q4 2025

Institutions

173

Top holders

FULC full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Fulcrum Therapeutics, Inc. SEC filings Fulcrum Therapeutics, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 359616109

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026

Ownership snapshot

Top reported holders of FULC - Fulcrum Therapeutics, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

RA CAPITAL MANAGEMENT, L.P.

Disclosed value leader

RA CAPITAL MANAGEMENT, L.P.

Comparable rows

15/15

Latest evidence

30 Sep 2025

13F 13D/G 3/4/5 Lead comparable stake: 9.9% 13D/G row: RA CAPITAL MANAGEMENT, L.P. Showing 1-6 of 15 holder rows.

Quick read

RA CAPITAL MANAGEMENT, L.P. leads the comparable SEC ownership view at 9.9%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens RA CAPITAL MANAGEMENT, L.P.'s linked filing trail.

Comparable ownership Top 5

RA CAPITAL MANAGEMENT, L.P. 9.9%

SUVRETTA CAPITAL MANAGEMENT, LLC 9.4%

Adage Capital Management, L.P. 4.5%

TCG Crossover Management, LLC 7.9%

Nantahala Capital Management, LLC 7%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
RA CAPITAL MANAGEMENT, L.P.	13F 13D/G 3/4/5 Company · 10%+ Owner 13F 13D/G 3/4/5	9.9% from 13D/G	$94,107,711 10,229,099 shares	—	30 Sep 2025
SUVRETTA CAPITAL MANAGEMENT, LLC	13F 13D/G Company 13F 13D/G	9.4% from 13D/G	$49,505,200 5,381,000 shares	—	30 Sep 2025
Adage Capital Management, L.P.	13D/G 13D/G	4.5%	$22,374,400 2,432,000 shares	-$19,844,400	30 Sep 2025
TCG Crossover Management, LLC	13F Company 13F	7.9%	$48,300,000 5,250,000 shares	—	30 Sep 2025
Nantahala Capital Management, LLC	13F Company 13F	7%	$42,971,213 4,670,784 shares	—	30 Sep 2025
BlackRock, Inc.	13F Company 13F	5.6%	$34,102,100 3,706,750 shares	—	30 Sep 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

173

67,444,423

Rows available

173

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2025 vs Q3 2025 Across Filers

Q3 2025 holders

127

Q4 2025 holders

173

Holder diff

Investor	Q3 2025 Shares	Q4 2025 Shares	Share Diff	Share Chg %	Q3 2025 value	Q4 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend