Who owns Rocket Pharmaceuticals, Inc. (RCKT)
Which tracked institutional funds hold RCKT, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RCKT company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
32 tracked funds added or opened RCKT while 22 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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
RCKT’s largest tracked holder by dollar value, WELLINGTON MANAGEMENT GROUP LLP, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in RCKT 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 2025-Q4 and 2026-Q1, across 204 tracked filers holding RCKT, 127 increased or opened the position and 90 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 RCKT between the 2025-Q4 and 2026-Q1 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 8
- VANGUARD PORTFOLIO MANAGEMENT LLC$17M
- VANGUARD CAPITAL MANAGEMENT LLC$14M
- Aberdeen Group plc$2M
- Woodline Partners LP$2M
- VANGUARD FIDUCIARY TRUST CO$2M
- JACOBS LEVY EQUITY MANAGEMENT, INC$1M
Full exits 10
- VANGUARD GROUP INC$28M
- SUVRETTA CAPITAL MANAGEMENT, LLC$11M
- TWO SIGMA ADVISERS, LP$7M
- MPM BIOIMPACT LLC$6M
- DekaBank Deutsche Girozentrale$3M
- PANAGORA ASSET MANAGEMENT INC$1M
Largest adds
- MARSHALL WACE, LLP$11M
- Nuveen, LLC$11M
- STATE STREET CORP$10M
- AQR CAPITAL MANAGEMENT LLC$8M
- MILLENNIUM MANAGEMENT LLC$5M
- UBS Group AG$4M
Largest trims
- MORGAN STANLEY$7M
- CITADEL ADVISORS LLC$5M
- TWO SIGMA INVESTMENTS, LP$4M
- Monaco Asset Management SAM$3M
- JPMORGAN CHASE & CO$2M
- Walleye Capital LLC$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| RTW INVESTMENTS, LP added | 17,687,772 | $63M | 11.2% | 2026-Q1 |
| BlackRock, Inc. trimmed | 7,834,795 | $28M | 4.9% | 2026-Q1 |
| CITIGROUP INC trimmed | 5,107,708 | $18M | 3.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 4,690,215 | $17M | 3.0% | 2026-Q1 |
| STATE STREET CORP added | 4,485,989 | $16M | 2.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,775,736 | $14M | 2.4% | 2026-Q1 |
| MAVERICK CAPITAL LTD added | 3,567,372 | $13M | 2.3% | 2026-Q1 |
| Newtyn Management, LLC added | 3,165,900 | $11M | 2.0% | 2026-Q1 |
| Nuveen, LLC added | 3,128,753 | $11M | 2.0% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 3,118,124 | $11M | 2.0% | 2026-Q1 |
| MARSHALL WACE, LLP added | 3,038,715 | $11M | 1.9% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 2,969,901 | $11M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,189,256 | $8M | 1.4% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 2,121,380 | $8M | 1.3% | 2026-Q1 |
| Monaco Asset Management SAM trimmed | 2,058,303 | $7M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 2,020,108 | $7M | 1.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,721,116 | $6M | 1.1% | 2026-Q1 |
| UBS Group AG added | 1,298,173 | $5M | 0.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 1,097,623 | $4M | 0.7% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 1,023,747 | $4M | 0.6% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 1,012,126 | $4M | 0.6% | 2026-Q1 |
| Opaleye Management Inc. | 955,000 | $3M | 0.6% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 859,874 | $3M | 0.5% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 796,224 | $3M | 0.5% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 724,392 | $3M | 0.5% | 2026-Q1 |
| Prosight Management, LP trimmed | 683,856 | $2M | 0.4% | 2026-Q1 |
| Aberdeen Group plc new | 664,821 | $2M | 0.4% | 2026-Q1 |
| Woodline Partners LP trimmed | 641,222 | $2M | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 640,840 | $2M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 637,174 | $2M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 630,125 | $2M | 0.4% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 623,354 | $2M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 590,750 | $2M | 0.4% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 482,079 | $2M | 0.3% | 2026-Q1 |
| Jump Financial, LLC added | 476,478 | $2M | 0.3% | 2026-Q1 |
| FMR LLC added | 462,630 | $2M | 0.3% | 2026-Q1 |
| ADAR1 Capital Management, LLC trimmed | 432,500 | $2M | 0.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC new | 416,533 | $1M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 385,639 | $1M | 0.2% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 381,839 | $1M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 347,543 | $1M | 0.2% | 2026-Q1 |
| Velan Capital Investment Management LP new | 294,643 | $1M | 0.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 288,264 | $1M | 0.2% | 2026-Q1 |
| Hennion & Walsh Asset Management, Inc. trimmed | 287,815 | $1M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 269,206 | $964K | 0.2% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 260,809 | $934K | 0.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 259,007 | $927K | 0.2% | 2026-Q1 |
| Privium Fund Management B.V. added | 242,146 | $867K | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 239,842 | $859K | 0.2% | 2026-Q1 |
| Creative Planning added | 217,851 | $780K | 0.1% | 2026-Q1 |
| M28 Capital Management LP trimmed | 210,871 | $755K | 0.1% | 2026-Q1 |
| Mariner, LLC added | 190,111 | $680K | 0.1% | 2026-Q1 |
| PDT Partners, LLC trimmed | 186,596 | $668K | 0.1% | 2026-Q1 |
| Amitell Capital Pte Ltd | 178,769 | $640K | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 178,027 | $637K | 0.1% | 2026-Q1 |
| CWM, LLC added | 174,263 | $624K | 0.1% | 2026-Q1 |
| LPL Financial LLC added | 156,086 | $559K | 0.1% | 2026-Q1 |
| MONIMUS CAPITAL MANAGEMENT, LP added | 153,728 | $550K | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 149,207 | $534K | 0.1% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 149,204 | $534K | 0.1% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 12,626,491 | $84M | 14.9% | 2025-Q1 stale |
| WESTFIELD CAPITAL MANAGEMENT CO LP added | 4,820,701 | $32M | 5.7% | 2025-Q1 stale |
| VANGUARD GROUP INC added | 7,948,073 | $28M | 4.9% | 2025-Q4 stale |
| SUVRETTA CAPITAL MANAGEMENT, LLC trimmed | 2,992,735 | $11M | 1.9% | 2025-Q4 stale |
| Pictet Asset Management Holding SA | 1,317,969 | $9M | 1.6% | 2025-Q1 stale |
| Novo Holdings A/S | 1,100,000 | $7M | 1.3% | 2025-Q1 stale |
| Frazier Life Sciences Management, L.P. trimmed | 1,079,025 | $7M | 1.3% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP added | 1,864,651 | $7M | 1.2% | 2025-Q4 stale |
| MPM BIOIMPACT LLC trimmed | 1,586,076 | $6M | 1.0% | 2025-Q4 stale |
| EVENTIDE ASSET MANAGEMENT, LLC | 770,691 | $5M | 0.9% | 2025-Q1 stale |
| Nantahala Capital Management, LLC new | 629,749 | $4M | 0.7% | 2025-Q1 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP | 413,550 | $3M | 0.6% | 2025-Q1 stale |
| TORONTO DOMINION BANK | 1,100,000 | $3M | 0.5% | 2025-Q2 stale |
| DekaBank Deutsche Girozentrale | 89,700 | $3M | 0.5% | 2025-Q4 stale |
| SYNOVUS FINANCIAL CORP added | 278,450 | $2M | 0.3% | 2025-Q1 stale |
| SPHERA FUNDS MANAGEMENT LTD. | 271,792 | $2M | 0.3% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC added | 718,781 | $2M | 0.3% | 2025-Q2 stale |
| Ikarian Capital, LLC | 221,911 | $1M | 0.3% | 2025-Q1 stale |
| Siren, L.L.C. | 591,263 | $1M | 0.3% | 2025-Q2 stale |
| Mirador Capital Partners LP added | 203,829 | $1M | 0.2% | 2025-Q1 stale |
| BAKER BROS. ADVISORS LP trimmed | 552,079 | $1M | 0.2% | 2025-Q2 stale |
| PANAGORA ASSET MANAGEMENT INC added | 348,803 | $1M | 0.2% | 2025-Q4 stale |
| HARBOR CAPITAL ADVISORS, INC. added | 178,236 | $1M | 0.2% | 2025-Q1 stale |
| New Leaf Venture Partners, L.L.C. | 150,706 | $1M | 0.2% | 2025-Q1 stale |
| Voss Capital, LP trimmed | 300,000 | $978K | 0.2% | 2025-Q3 stale |
| PERCEPTIVE ADVISORS LLC trimmed | 140,726 | $939K | 0.2% | 2025-Q1 stale |
| ACADIAN ASSET MANAGEMENT LLC added | 242,169 | $847K | 0.1% | 2025-Q4 stale |
| ALGERT GLOBAL LLC added | 341,760 | $837K | 0.1% | 2025-Q2 stale |
| Torray Investment Partners LLC trimmed | 117,301 | $782K | 0.1% | 2025-Q1 stale |
| Qube Research & Technologies Ltd trimmed | 219,973 | $772K | 0.1% | 2025-Q4 stale |
| JENNISON ASSOCIATES LLC added | 114,580 | $764K | 0.1% | 2025-Q1 stale |
| EFG Asset Management (North America) Corp. trimmed | 110,961 | $737K | 0.1% | 2025-Q1 stale |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 187,401 | $693K | 0.1% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 274,875 | $673K | 0.1% | 2025-Q2 stale |
| NORDEA INVESTMENT MANAGEMENT AB added | 263,746 | $659K | 0.1% | 2025-Q2 stale |
| Campbell & CO Investment Adviser LLC added | 90,084 | $601K | 0.1% | 2025-Q1 stale |
| Sovran Advisors, LLC trimmed | 196,028 | $580K | 0.1% | 2025-Q2 stale |
| ACUTA CAPITAL PARTNERS, LLC trimmed | 83,350 | $556K | 0.1% | 2025-Q1 stale |
| SUPERSTRING CAPITAL MANAGEMENT LP new | 214,412 | $525K | 0.1% | 2025-Q2 stale |
| Schonfeld Strategic Advisors LLC added | 149,413 | $524K | 0.1% | 2025-Q4 stale |
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.