Who owns RCUS (RCUS)
Which tracked institutional funds hold RCUS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RCUS company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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
43 tracked funds added or opened RCUS while 72 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
RCUS’s largest tracked holder by dollar value, GILEAD SCIENCES, INC., sizes it at 32.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 32.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in RCUS 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 210 tracked filers holding RCUS, 118 increased or opened the position and 94 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 RCUS 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 19
- VANGUARD PORTFOLIO MANAGEMENT LLC$92M
- VANGUARD CAPITAL MANAGEMENT LLC$83M
- Logos Global Management LP$26M
- VANGUARD FIDUCIARY TRUST CO$13M
- Ensign Peak Advisors, Inc$5M
- DIADEMA PARTNERS LP$5M
Full exits 23
- VANGUARD GROUP INC$174M
- TORONTO DOMINION BANK$35M
- FRANKLIN RESOURCES INC$20M
- Balyasny Asset Management L.P.$19M
- First Turn Management, LLC$13M
- Affinity Asset Advisors, LLC$7M
Largest adds
- CITADEL ADVISORS LLC$26M
- RENAISSANCE TECHNOLOGIES LLC$8M
- STATE STREET CORP$8M
- Aberdeen Group plc$7M
- WELLINGTON MANAGEMENT GROUP LLP$7M
- Invesco Ltd.$6M
Largest trims
- BlackRock, Inc.$149M
- Point72 Asset Management, L.P.$75M
- GILEAD SCIENCES, INC.$70M
- BARCLAYS PLC$25M
- Caption Management, LLC$18M
- SUVRETTA CAPITAL MANAGEMENT, LLC$15M
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 |
|---|---|---|---|---|
| GILEAD SCIENCES, INC. | 31,424,760 | $679M | 24.8% | 2026-Q1 |
| BlackRock, Inc. trimmed | 9,662,107 | $209M | 7.6% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 6,022,806 | $130M | 4.8% | 2026-Q1 |
| STATE STREET CORP added | 5,412,901 | $117M | 4.3% | 2026-Q1 |
| SUVRETTA CAPITAL MANAGEMENT, LLC trimmed | 5,030,993 | $109M | 4.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 4,272,056 | $92M | 3.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,856,725 | $83M | 3.0% | 2026-Q1 |
| Woodline Partners LP added | 3,777,798 | $82M | 3.0% | 2026-Q1 |
| MARSHALL WACE, LLP added | 3,761,437 | $81M | 3.0% | 2026-Q1 |
| Siren, L.L.C. | 3,007,077 | $65M | 2.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,252,367 | $49M | 1.8% | 2026-Q1 |
| Fisher Asset Management, LLC added | 2,190,404 | $47M | 1.7% | 2026-Q1 |
| SAMLYN CAPITAL, LLC added | 1,908,412 | $41M | 1.5% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. trimmed | 1,654,754 | $36M | 1.3% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,426,223 | $31M | 1.1% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,329,935 | $29M | 1.0% | 2026-Q1 |
| Parkman Healthcare Partners LLC added | 1,207,274 | $26M | 1.0% | 2026-Q1 |
| Logos Global Management LP added | 1,200,000 | $26M | 0.9% | 2026-Q1 |
| FMR LLC added | 1,163,584 | $25M | 0.9% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,113,526 | $24M | 0.9% | 2026-Q1 |
| Trails Edge Capital Partners, LP added | 1,047,935 | $23M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 999,786 | $22M | 0.8% | 2026-Q1 |
| Sofinnova Investments, Inc. trimmed | 923,086 | $20M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 903,638 | $20M | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP added | 840,305 | $18M | 0.7% | 2026-Q1 |
| Candriam S.C.A. | 790,613 | $17M | 0.6% | 2026-Q1 |
| Aberdeen Group plc added | 769,787 | $17M | 0.6% | 2026-Q1 |
| Invesco Ltd. added | 744,813 | $16M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 646,068 | $14M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 582,920 | $13M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp added | 511,166 | $11M | 0.4% | 2026-Q1 |
| Decheng Capital LLC trimmed | 477,819 | $10M | 0.4% | 2026-Q1 |
| Soleus Capital Management, L.P. trimmed | 451,983 | $10M | 0.4% | 2026-Q1 |
| DAFNA Capital Management LLC added | 443,829 | $10M | 0.4% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 430,346 | $9M | 0.3% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 424,700 | $9M | 0.3% | 2026-Q1 |
| BAKER BROS. ADVISORS LP added | 415,621 | $9M | 0.3% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 413,778 | $9M | 0.3% | 2026-Q1 |
| PDT Partners, LLC | 388,338 | $8M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 381,856 | $8M | 0.3% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 379,100 | $8M | 0.3% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 356,535 | $8M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 312,690 | $7M | 0.2% | 2026-Q1 |
| Public Sector Pension Investment Board added | 303,316 | $7M | 0.2% | 2026-Q1 |
| UBS Group AG trimmed | 288,857 | $6M | 0.2% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 281,681 | $6M | 0.2% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 259,400 | $6M | 0.2% | 2026-Q1 |
| Ensign Peak Advisors, Inc added | 252,933 | $5M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 241,492 | $5M | 0.2% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC | 239,966 | $5M | 0.2% | 2026-Q1 |
| DIADEMA PARTNERS LP added | 238,142 | $5M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 221,710 | $5M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 216,311 | $5M | 0.2% | 2026-Q1 |
| Patient Square Capital LP added | 195,000 | $4M | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 193,561 | $4M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 188,650 | $4M | 0.1% | 2026-Q1 |
| Rock Springs Capital Management LP | 180,000 | $4M | 0.1% | 2026-Q1 |
| Swiss National Bank added | 171,296 | $4M | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 160,082 | $3M | 0.1% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 158,292 | $3M | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 143,371 | $3M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 124,085 | $3M | 0.1% | 2026-Q1 |
| Jump Financial, LLC added | 135,800 | $3M | 0.1% | 2026-Q1 |
| PLATINUM INVESTMENT MANAGEMENT LTD | 134,217 | $3M | 0.1% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 129,273 | $3M | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC added | 115,134 | $2M | 0.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 107,979 | $2M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 105,776 | $2M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 89,625 | $2M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 87,973 | $2M | 0.1% | 2026-Q1 |
| Parallel Advisors, LLC | 86,557 | $2M | 0.1% | 2026-Q1 |
| Tidal Investments LLC new | 86,342 | $2M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 86,192 | $2M | 0.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 83,358 | $2M | 0.1% | 2026-Q1 |
| Knott David M Jr trimmed | 81,241 | $2M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 7,285,906 | $174M | 6.3% | 2025-Q4 stale |
| TORONTO DOMINION BANK added | 1,484,699 | $35M | 1.3% | 2025-Q4 stale |
| FRANKLIN RESOURCES INC trimmed | 853,491 | $20M | 0.7% | 2025-Q4 stale |
| Balyasny Asset Management L.P. added | 815,561 | $19M | 0.7% | 2025-Q4 stale |
| RA CAPITAL MANAGEMENT, L.P. | 1,136,364 | $15M | 0.6% | 2025-Q3 stale |
| First Turn Management, LLC new | 565,142 | $13M | 0.5% | 2025-Q4 stale |
| Affinity Asset Advisors, LLC new | 300,000 | $7M | 0.3% | 2025-Q4 stale |
| Cutter Capital Management, LP added | 731,818 | $6M | 0.2% | 2025-Q1 stale |
| MACQUARIE GROUP LTD | 379,100 | $5M | 0.2% | 2025-Q3 stale |
| Nicholas Investment Partners, LP new | 204,338 | $5M | 0.2% | 2025-Q4 stale |
| NORDEA INVESTMENT MANAGEMENT AB added | 328,459 | $4M | 0.2% | 2025-Q3 stale |
| Granahan Investment Management, LLC trimmed | 169,940 | $4M | 0.1% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 168,876 | $4M | 0.1% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP trimmed | 285,400 | $4M | 0.1% | 2025-Q3 stale |
| Vestal Point Capital, LP new | 250,000 | $3M | 0.1% | 2025-Q3 stale |
| Alyeska Investment Group, L.P. new | 142,518 | $3M | 0.1% | 2025-Q4 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 239,420 | $3M | 0.1% | 2025-Q3 stale |
| AXA Investment Managers S.A. new | 232,668 | $3M | 0.1% | 2025-Q3 stale |
| AMERICAN CENTURY COMPANIES INC added | 128,947 | $3M | 0.1% | 2025-Q4 stale |
| Integral Health Asset Management, LLC new | 300,000 | $2M | 0.1% | 2025-Q2 stale |
| LMR Partners LLP new | 100,000 | $2M | 0.1% | 2025-Q4 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 152,000 | $2M | 0.1% | 2025-Q3 stale |
| AXA S.A. added | 231,978 | $2M | 0.1% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC trimmed | 226,337 | $2M | 0.1% | 2025-Q2 stale |
| GROUP ONE TRADING LLC added | 130,449 | $2M | 0.1% | 2025-Q3 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.