Who owns Fulcrum Therapeutics (FULC)
Which tracked institutional funds hold FULC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See FULC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
20 tracked funds added or opened FULC while 54 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
FULC’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes FULC more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in FULC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 149 tracked filers holding FULC, 97 increased or opened the position and 81 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in FULC between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- EcoR1 Capital, LLC$24M
- TANG CAPITAL MANAGEMENT LLC$24M
- MARSHALL WACE, LLP$5M
- Peapod Lane Capital LLC$1M
- Hennion & Walsh Asset Management, Inc.$856K
- Quadrature Capital Ltd$692K
Full exits 17
- RA CAPITAL MANAGEMENT, L.P.$46M
- TCG Crossover Management, LLC$40M
- BRAIDWELL LP$24M
- Siren, L.L.C.$18M
- First Turn Management, LLC$17M
- Aberdeen Group plc$17M
Largest adds
- RENAISSANCE TECHNOLOGIES LLC$6M
- JANE STREET GROUP, LLC$6M
- ADAR1 Capital Management, LLC$5M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$4M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$4M
- BANK OF AMERICA CORP /DE/$3M
Largest trims
- MONTANOVA CAPITAL, LLC$37M
- Point72 Asset Management, L.P.$14M
- BALYASNY ASSET MANAGEMENT L.P.$11M
- VANGUARD CAPITAL MANAGEMENT LLC$11M
- BlackRock, Inc.$9M
- GSK plc$7M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 8,824,259 | $32M | 11.3% | 2026-Q2 |
| EcoR1 Capital, LLC new | 6,549,866 | $24M | 8.4% | 2026-Q2 |
| TANG CAPITAL MANAGEMENT LLC new | 6,521,412 | $24M | 8.4% | 2026-Q2 |
| Nantahala Capital Management, LLC added | 5,475,040 | $20M | 7.0% | 2026-Q2 |
| MONTANOVA CAPITAL, LLC trimmed | 3,680,921 | $13M | 4.7% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 3,044,385 | $11M | 3.9% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,704,505 | $10M | 3.5% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,697,216 | $10M | 3.5% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 2,217,498 | $8M | 2.8% | 2026-Q2 |
| STATE STREET CORP added | 2,037,025 | $7M | 2.6% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 2,000,000 | $7M | 2.6% | 2026-Q2 |
| GSK plc | 1,785,714 | $7M | 2.3% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 1,748,467 | $6M | 2.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,647,800 | $6M | 2.1% | 2026-Q2 |
| ADAR1 Capital Management, LLC added | 1,565,029 | $6M | 2.0% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 1,485,803 | $5M | 1.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,432,133 | $5M | 1.8% | 2026-Q2 |
| MARSHALL WACE, LLP added | 1,358,423 | $5M | 1.7% | 2026-Q2 |
| UBS Group AG added | 1,253,909 | $5M | 1.6% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 1,180,946 | $4M | 1.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,103,261 | $4M | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 1,094,425 | $4M | 1.4% | 2026-Q2 |
| Ikarian Capital, LLC | 1,049,161 | $4M | 1.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 1,043,029 | $4M | 1.3% | 2026-Q2 |
| Jump Financial, LLC added | 1,005,000 | $4M | 1.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 960,547 | $4M | 1.2% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 835,204 | $3M | 1.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 812,766 | $3M | 1.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 782,144 | $3M | 1.0% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 745,317 | $3M | 1.0% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 692,372 | $3M | 0.9% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 681,832 | $2M | 0.9% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 651,427 | $2M | 0.8% | 2026-Q2 |
| NORTHERN TRUST CORP added | 487,869 | $2M | 0.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 433,220 | $2M | 0.6% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 345,648 | $1M | 0.4% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC | 303,988 | $1M | 0.4% | 2026-Q2 |
| Peapod Lane Capital LLC new | 285,798 | $1M | 0.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 285,084 | $1M | 0.4% | 2026-Q2 |
| Engineers Gate Manager LP added | 242,000 | $886K | 0.3% | 2026-Q2 |
| Hennion & Walsh Asset Management, Inc. new | 233,851 | $856K | 0.3% | 2026-Q2 |
| EntryPoint Capital, LLC added | 217,199 | $795K | 0.3% | 2026-Q2 |
| XTX Topco Ltd added | 209,247 | $766K | 0.3% | 2026-Q2 |
| Quadrature Capital Ltd new | 189,119 | $692K | 0.2% | 2026-Q2 |
| MORGAN STANLEY added | 184,192 | $674K | 0.2% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 155,868 | $570K | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 154,871 | $567K | 0.2% | 2026-Q2 |
| Bank of New York Mellon Corp added | 154,513 | $566K | 0.2% | 2026-Q2 |
| Simplify Asset Management Inc. added | 153,794 | $563K | 0.2% | 2026-Q2 |
| Fiduciary Trust Co | 136,555 | $500K | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 126,558 | $463K | 0.2% | 2026-Q2 |
| Verdad Advisers, LP new | 125,224 | $458K | 0.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 119,038 | $436K | 0.2% | 2026-Q2 |
| Rangeley Capital, LLC new | 114,890 | $420K | 0.1% | 2026-Q2 |
| Invesco Ltd. added | 113,319 | $415K | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 109,353 | $426K | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 104,199 | $381K | 0.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 102,400 | $375K | 0.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 101,360 | $371K | 0.1% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC trimmed | 95,521 | $350K | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 94,235 | $345K | 0.1% | 2026-Q2 |
| FMR LLC added | 92,327 | $338K | 0.1% | 2026-Q2 |
| Headlands Technologies LLC new | 89,723 | $328K | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 85,580 | $313K | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 83,373 | $305K | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 83,370 | $639K | 0.2% | 2026-Q2 |
| AXQ CAPITAL, LP added | 81,483 | $298K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 73,443 | $269K | 0.1% | 2026-Q2 |
| RBF Capital, LLC | 70,000 | $256K | 0.1% | 2026-Q2 |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 67,857 | $248K | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC trimmed | 67,632 | $248K | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 62,774 | $230K | 0.1% | 2026-Q2 |
| FOX RUN MANAGEMENT, L.L.C. added | 56,446 | $207K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 52,381 | $192K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 49,696 | $182K | 0.1% | 2026-Q2 |
| STRS OHIO trimmed | 46,200 | $169K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 41,371 | $154K | 0.1% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC trimmed | 40,000 | $146K | 0.1% | 2026-Q2 |
| Marquette Asset Management, LLC new | 38,552 | $141K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC added | 34,079 | $125K | 0.0% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 34,063 | $125K | 0.0% | 2026-Q2 |
| PROFUND ADVISORS LLC added | 32,514 | $119K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 30,681 | $112K | 0.0% | 2026-Q2 |
| COUNTRY TRUST BANK | 30,041 | $110K | 0.0% | 2026-Q2 |
| LMR Partners LLP | 30,000 | $110K | 0.0% | 2026-Q2 |
| Aigen Investment Management, LP new | 29,512 | $108K | 0.0% | 2026-Q2 |
| Scientech Research LLC new | 28,584 | $105K | 0.0% | 2026-Q2 |
| Mariner, LLC added | 28,104 | $103K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 27,325 | $100K | 0.0% | 2026-Q2 |
| Graham Capital Management, L.P. trimmed | 25,067 | $92K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 25,052 | $92K | 0.0% | 2026-Q2 |
| Rafferty Asset Management, LLC trimmed | 24,538 | $90K | 0.0% | 2026-Q2 |
| Creative Planning trimmed | 21,373 | $78K | 0.0% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV added | 21,370 | $78K | 0.0% | 2026-Q2 |
| Castleview Partners, LLC new | 19,100 | $70K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 18,858 | $69K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey | 18,562 | $68K | 0.0% | 2026-Q2 |
| Seven Fleet Capital Management LP trimmed | 18,089 | $66K | 0.0% | 2026-Q2 |
| Westshore Wealth, LLC | 17,000 | $62K | 0.0% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 16,719 | $61K | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.