Who owns Rapport Therapeutics, Inc. Common Stock (RAPP)
Which tracked institutional funds hold RAPP, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RAPP 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
The tracked-fund tape on RAPP is one-sided between 2026-Q1 and 2026-Q2: 72 added or opened and 11 trimmed or exited — on balance accumulating.
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
RAPP’s largest tracked holder by dollar value, FMR LLC, 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 RAPP 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 156 tracked filers holding RAPP, 85 increased or opened the position and 62 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 RAPP 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 12
- ALGERT GLOBAL LLC$9M
- Woodline Partners LP$4M
- CITADEL ADVISORS LLC$3M
- ORBIMED ADVISORS LLC$3M
- STEMPOINT CAPITAL LP$3M
- JANE STREET GROUP, LLC$2M
Full exits 3
- T. Rowe Price Investment Management, Inc.$19M
- Freestone Grove Partners LP$4M
- SECTORAL ASSET MANAGEMENT INC$835K
Largest adds
- FMR LLC$75M
- ARCH Venture Management, LLC$39M
- TRV GP V, LLC$38M
- BlackRock, Inc.$34M
- GOLDMAN SACHS GROUP INC$29M
- Capital International Investors$25M
Largest trims
- Vestal Point Capital, LP$15M
- MILLENNIUM MANAGEMENT LLC$4M
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$2M
- CITIGROUP INC$1M
- ALLIANCEBERNSTEIN L.P.$387K
- Y-Intercept (Hong Kong) Ltd$321K
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 |
|---|---|---|---|---|
| FMR LLC added | 7,172,894 | $299M | 14.2% | 2026-Q2 |
| TRV GP V, LLC trimmed | 6,280,525 | $262M | 12.4% | 2026-Q2 |
| ARCH Venture Management, LLC | 3,728,738 | $155M | 7.4% | 2026-Q2 |
| Capital International Investors trimmed | 2,921,958 | $122M | 5.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 2,910,449 | $121M | 5.8% | 2026-Q2 |
| BlackRock, Inc. added | 2,699,786 | $113M | 5.3% | 2026-Q2 |
| Cormorant Asset Management, LP trimmed | 2,657,521 | $111M | 5.3% | 2026-Q2 |
| Sofinnova Investments, Inc. | 1,904,408 | $79M | 3.8% | 2026-Q2 |
| JOHNSON & JOHNSON | 1,784,517 | $74M | 3.5% | 2026-Q2 |
| Polar Capital Holdings Plc trimmed | 1,608,514 | $67M | 3.2% | 2026-Q2 |
| BAKER BROS. ADVISORS LP | 1,547,090 | $64M | 3.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,346,512 | $56M | 2.7% | 2026-Q2 |
| TRV GP VI, LLC | 969,218 | $40M | 1.9% | 2026-Q2 |
| STATE STREET CORP added | 818,712 | $34M | 1.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 793,453 | $33M | 1.6% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 787,446 | $33M | 1.6% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC added | 773,342 | $32M | 1.5% | 2026-Q2 |
| Vestal Point Capital, LP trimmed | 730,000 | $30M | 1.4% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 693,384 | $22M | 1.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 644,082 | $27M | 1.3% | 2026-Q2 |
| Siren, L.L.C. | 641,469 | $27M | 1.3% | 2026-Q2 |
| Capital World Investors added | 551,657 | $23M | 1.1% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 362,114 | $15M | 0.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 359,944 | $15M | 0.7% | 2026-Q2 |
| Candriam S.C.A. added | 347,650 | $14M | 0.7% | 2026-Q2 |
| Sio Capital Management, LLC trimmed | 307,657 | $13M | 0.6% | 2026-Q2 |
| MORGAN STANLEY added | 297,612 | $12M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 277,305 | $12M | 0.5% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 250,795 | $10M | 0.5% | 2026-Q2 |
| Burkehill Global Management, LP | 250,000 | $10M | 0.5% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 246,815 | $10M | 0.5% | 2026-Q2 |
| ALGERT GLOBAL LLC new | 223,822 | $9M | 0.4% | 2026-Q2 |
| Invesco Ltd. added | 215,236 | $9M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 214,831 | $9M | 0.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 208,333 | $9M | 0.4% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 165,546 | $7M | 0.3% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 154,908 | $6M | 0.3% | 2026-Q2 |
| UBS Group AG trimmed | 151,174 | $6M | 0.3% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 150,000 | $6M | 0.3% | 2026-Q2 |
| Artia Global Partners LP | 138,508 | $6M | 0.3% | 2026-Q2 |
| Swedbank AB added | 117,400 | $5M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 103,361 | $4M | 0.2% | 2026-Q2 |
| Walleye Capital LLC added | 102,163 | $4M | 0.2% | 2026-Q2 |
| Woodline Partners LP trimmed | 97,537 | $4M | 0.2% | 2026-Q2 |
| TD Asset Management Inc trimmed | 91,878 | $4M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 86,988 | $4M | 0.2% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 86,885 | $4M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 82,442 | $3M | 0.2% | 2026-Q2 |
| Bank of New York Mellon Corp added | 82,222 | $3M | 0.2% | 2026-Q2 |
| ORBIMED ADVISORS LLC new | 76,616 | $3M | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 76,076 | $3M | 0.2% | 2026-Q2 |
| DAFNA Capital Management LLC | 75,000 | $3M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 69,682 | $3M | 0.1% | 2026-Q2 |
| STEMPOINT CAPITAL LP new | 66,582 | $3M | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 65,764 | $3M | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 61,441 | $3M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 58,537 | $2M | 0.1% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 57,468 | $2M | 0.1% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 55,705 | $2M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 55,458 | $2M | 0.1% | 2026-Q2 |
| Swiss National Bank trimmed | 55,200 | $2M | 0.1% | 2026-Q2 |
| Trexquant Investment LP added | 53,937 | $2M | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC added | 48,243 | $2M | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 39,978 | $2M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 37,198 | $2M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 32,499 | $1M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 32,212 | $1M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 32,171 | $1M | 0.1% | 2026-Q2 |
| Integrated Quantitative Investments LLC new | 30,386 | $1M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 26,454 | $1M | 0.1% | 2026-Q2 |
| Ellsworth Advisors, LLC new | 24,539 | $980K | 0.0% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 24,470 | $1M | 0.0% | 2026-Q2 |
| CITIGROUP INC trimmed | 24,373 | $1M | 0.0% | 2026-Q2 |
| Creative Planning added | 22,918 | $955K | 0.0% | 2026-Q2 |
| Legal & General Group Plc added | 22,555 | $940K | 0.0% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 22,101 | $921K | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 22,055 | $919K | 0.0% | 2026-Q2 |
| Engineers Gate Manager LP new | 21,314 | $888K | 0.0% | 2026-Q2 |
| Legato Capital Management LLC new | 21,124 | $880K | 0.0% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd trimmed | 19,189 | $800K | 0.0% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 18,532 | $772K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC added | 18,009 | $750K | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 17,240 | $718K | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 16,564 | $669K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 16,294 | $679K | 0.0% | 2026-Q2 |
| BARCLAYS PLC added | 14,994 | $625K | 0.0% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 14,696 | $612K | 0.0% | 2026-Q2 |
| Sound Capital Solutions LLC new | 14,606 | $609K | 0.0% | 2026-Q2 |
| OPTIMIZE FINANCIAL INC. trimmed | 14,606 | $609K | 0.0% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 14,256 | $594K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 14,108 | $588K | 0.0% | 2026-Q2 |
| PSP Research LLC | 14,000 | $583K | 0.0% | 2026-Q2 |
| Jupiter Topco LLC new | 13,800 | $574K | 0.0% | 2026-Q2 |
| Allianz Asset Management GmbH | 13,200 | $413K | 0.0% | 2026-Q2 |
| VARCOV Co. trimmed | 12,895 | $537K | 0.0% | 2026-Q2 |
| China Universal Asset Management Co., Ltd. trimmed | 10,812 | $451K | 0.0% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 10,300 | $429K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 10,176 | $424K | 0.0% | 2026-Q2 |
| CATALYST PRIVATE WEALTH, LLC | 10,000 | $417K | 0.0% | 2026-Q2 |
| STIFEL FINANCIAL CORP added | 9,773 | $407K | 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.