Who owns Solid Biosciences (SLDB)
Which tracked institutional funds hold SLDB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SLDB 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 SLDB is one-sided between 2026-Q1 and 2026-Q2: 63 added or opened and 17 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
SLDB’s largest tracked holder by dollar value, RA CAPITAL MANAGEMENT, L.P., sizes it at 1.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in SLDB 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 154 tracked filers holding SLDB, 96 increased or opened the position and 68 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
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 SLDB 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
- Jupiter Topco LLC$40M
- RTW INVESTMENTS, LP$39M
- SILVERARC CAPITAL MANAGEMENT, LLC$7M
- Soleus Capital Management, L.P.$1M
- Qube Research & Technologies Ltd$1M
- Y-Intercept (Hong Kong) Ltd$1M
Full exits 6
- JANUS HENDERSON GROUP PLC$29M
- Nantahala Capital Management, LLC$8M
- MILLENNIUM MANAGEMENT LLC$3M
- Parkman Healthcare Partners LLC$2M
- PANAGORA ASSET MANAGEMENT INC$656K
- HRT FINANCIAL LP$625K
Largest adds
- RA CAPITAL MANAGEMENT, L.P.$53M
- FMR LLC$43M
- STATE STREET CORP$34M
- BlackRock, Inc.$34M
- PERCEPTIVE ADVISORS LLC$33M
- Bain Capital Life Sciences Investors, LLC$27M
Largest trims
- Vestal Point Capital, LP$14M
- Point72 Asset Management, L.P.$10M
- Monashee Investment Management LLC$5M
- Ally Bridge Group (NY) LLC$3M
- Ikarian Capital, LLC$1M
- Invesco Ltd.$1M
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 |
|---|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. added | 12,036,126 | $120M | 10.5% | 2026-Q2 |
| PERCEPTIVE ADVISORS LLC | 11,906,646 | $119M | 10.4% | 2026-Q2 |
| Bain Capital Life Sciences Investors, LLC | 9,808,819 | $98M | 8.6% | 2026-Q2 |
| Siren, L.L.C. | 7,690,405 | $77M | 6.7% | 2026-Q2 |
| BlackRock, Inc. added | 6,934,248 | $69M | 6.1% | 2026-Q2 |
| FMR LLC added | 6,875,957 | $69M | 6.0% | 2026-Q2 |
| ARMISTICE CAPITAL, LLC added | 4,278,000 | $43M | 3.7% | 2026-Q2 |
| STATE STREET CORP added | 4,175,365 | $42M | 3.7% | 2026-Q2 |
| Jupiter Topco LLC new | 4,043,605 | $40M | 3.5% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 4,009,922 | $40M | 3.5% | 2026-Q2 |
| RTW INVESTMENTS, LP new | 3,892,926 | $39M | 3.4% | 2026-Q2 |
| Deep Track Capital, LP | 3,565,062 | $36M | 3.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 3,440,708 | $34M | 3.0% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 2,815,122 | $28M | 2.5% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 2,280,484 | $23M | 2.0% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 2,225,783 | $22M | 1.9% | 2026-Q2 |
| Vestal Point Capital, LP trimmed | 2,160,000 | $22M | 1.9% | 2026-Q2 |
| Redmile Group, LLC trimmed | 1,948,695 | $19M | 1.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,940,824 | $19M | 1.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 1,602,917 | $16M | 1.4% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 1,506,506 | $15M | 1.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,266,290 | $13M | 1.1% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL added | 756,277 | $8M | 0.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 748,589 | $7M | 0.7% | 2026-Q2 |
| Woodline Partners LP added | 674,076 | $7M | 0.6% | 2026-Q2 |
| SILVERARC CAPITAL MANAGEMENT, LLC added | 668,450 | $7M | 0.6% | 2026-Q2 |
| Birchview Capital, LP added | 666,196 | $7M | 0.6% | 2026-Q2 |
| NORTHERN TRUST CORP added | 603,647 | $6M | 0.5% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP added | 603,472 | $6M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 524,102 | $5M | 0.5% | 2026-Q2 |
| Monashee Investment Management LLC trimmed | 500,000 | $5M | 0.4% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 494,730 | $5M | 0.4% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 448,008 | $4M | 0.4% | 2026-Q2 |
| STEMPOINT CAPITAL LP added | 358,780 | $4M | 0.3% | 2026-Q2 |
| Boxer Capital Management, LLC | 300,000 | $3M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 281,673 | $3M | 0.2% | 2026-Q2 |
| Ally Bridge Group (NY) LLC trimmed | 255,959 | $3M | 0.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 255,195 | $3M | 0.2% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 244,401 | $2M | 0.2% | 2026-Q2 |
| Bank of New York Mellon Corp added | 243,154 | $2M | 0.2% | 2026-Q2 |
| J. Goldman & Co LP trimmed | 242,164 | $2M | 0.2% | 2026-Q2 |
| Nuveen, LLC trimmed | 241,642 | $2M | 0.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 222,789 | $2M | 0.2% | 2026-Q2 |
| UBS Group AG added | 188,347 | $2M | 0.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 187,419 | $2M | 0.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP added | 185,365 | $2M | 0.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. | 178,253 | $2M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 163,037 | $2M | 0.1% | 2026-Q2 |
| Apis Capital Advisors, LLC | 160,000 | $2M | 0.1% | 2026-Q2 |
| Soleus Capital Management, L.P. new | 150,000 | $1M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 148,432 | $1M | 0.1% | 2026-Q2 |
| Invesco Ltd. trimmed | 143,437 | $1M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 137,085 | $1M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 136,903 | $1M | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 109,886 | $1M | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 108,212 | $1M | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC trimmed | 107,279 | $1M | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 105,068 | $1M | 0.1% | 2026-Q2 |
| Fisher Asset Management, LLC | 103,481 | $1M | 0.1% | 2026-Q2 |
| ALPS ADVISORS INC new | 99,916 | $998K | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 89,034 | $889K | 0.1% | 2026-Q2 |
| Jump Financial, LLC trimmed | 88,151 | $881K | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 82,100 | $820K | 0.1% | 2026-Q2 |
| Verition Fund Management LLC new | 81,275 | $812K | 0.1% | 2026-Q2 |
| Quadrature Capital Ltd added | 78,290 | $782K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 77,542 | $775K | 0.1% | 2026-Q2 |
| Quantum Private Wealth, LLC trimmed | 73,898 | $738K | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC new | 71,779 | $717K | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. | 69,260 | $499K | 0.0% | 2026-Q2 |
| Trexquant Investment LP trimmed | 69,128 | $691K | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 68,763 | $687K | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 65,003 | $649K | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 64,637 | $646K | 0.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 62,211 | $621K | 0.1% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 61,786 | $617K | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 60,705 | $606K | 0.1% | 2026-Q2 |
| DeepCurrents Investment Group LLC new | 59,173 | $591K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC added | 58,591 | $585K | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 57,618 | $576K | 0.1% | 2026-Q2 |
| Knott David M Jr added | 56,208 | $562K | 0.0% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 48,300 | $483K | 0.0% | 2026-Q2 |
| BANK OF NOVA SCOTIA new | 47,201 | $472K | 0.0% | 2026-Q2 |
| MetLife Investment Management, LLC added | 46,157 | $461K | 0.0% | 2026-Q2 |
| Virtus Investment Advisers, LLC new | 45,826 | $458K | 0.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 44,574 | $441K | 0.0% | 2026-Q2 |
| Ikarian Capital, LLC trimmed | 42,956 | $429K | 0.0% | 2026-Q2 |
| Quantinno Capital Management LP new | 40,140 | $401K | 0.0% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 36,920 | $369K | 0.0% | 2026-Q2 |
| PROFUND ADVISORS LLC new | 36,543 | $365K | 0.0% | 2026-Q2 |
| Creative Planning added | 35,860 | $358K | 0.0% | 2026-Q2 |
| CIBC Bancorp USA Inc. added | 34,976 | $349K | 0.0% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 33,291 | $333K | 0.0% | 2026-Q2 |
| ArchPoint Investors new | 31,326 | $313K | 0.0% | 2026-Q2 |
| Engineers Gate Manager LP added | 28,915 | $289K | 0.0% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 27,804 | $285K | 0.0% | 2026-Q2 |
| Atom Investors LP trimmed | 27,182 | $272K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey added | 23,210 | $232K | 0.0% | 2026-Q2 |
| SFMG, LLC | 22,153 | $221K | 0.0% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 21,243 | $212K | 0.0% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 19,949 | $199K | 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.