Who owns SLNO (SLNO)
Which tracked institutional funds hold SLNO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SLNO 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
51 tracked funds added or opened SLNO while 120 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
SLNO’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 0.2% of theirs — a 0.2pp gap the other way — the median holder sizes SLNO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in SLNO 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 225 tracked filers holding SLNO, 136 increased or opened the position and 137 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 SLNO 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 29
- VANGUARD CAPITAL MANAGEMENT LLC$72M
- Khrom Capital Management LLC$51M
- Vestal Point Capital, LP$24M
- Kynam Capital Management, LP$19M
- VANGUARD PORTFOLIO MANAGEMENT LLC$16M
- RENAISSANCE TECHNOLOGIES LLC$15M
Full exits 28
- VANGUARD GROUP INC$123M
- GREAT POINT PARTNERS LLC$19M
- Assenagon Asset Management S.A.$18M
- Balyasny Asset Management L.P.$11M
- Skandinaviska Enskilda Banken AB (publ)$9M
- Clark Capital Management Group, Inc.$8M
Largest adds
- Caption Management, LLC$12M
- Ikarian Capital, LLC$8M
- MARSHALL WACE, LLP$7M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$7M
- Hudson Bay Capital Management LP$7M
- BANK OF AMERICA CORP /DE/$5M
Largest trims
- JANUS HENDERSON GROUP PLC$327M
- FMR LLC$180M
- PRICE T ROWE ASSOCIATES INC /MD/$119M
- Avoro Capital Advisors LLC$57M
- BlackRock, Inc.$54M
- Invesco Ltd.$39M
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 |
|---|---|---|---|---|
| FMR LLC trimmed | 5,788,352 | $194M | 7.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 4,367,682 | $146M | 5.4% | 2026-Q1 |
| BlackRock, Inc. trimmed | 3,742,774 | $125M | 4.6% | 2026-Q1 |
| STATE STREET CORP added | 2,680,802 | $90M | 3.3% | 2026-Q1 |
| Avoro Capital Advisors LLC trimmed | 2,300,000 | $77M | 2.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,153,218 | $72M | 2.7% | 2026-Q1 |
| Nantahala Capital Management, LLC added | 1,744,124 | $58M | 2.2% | 2026-Q1 |
| Polar Capital Holdings Plc added | 1,698,855 | $57M | 2.1% | 2026-Q1 |
| Khrom Capital Management LLC new | 1,511,481 | $51M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,237,550 | $41M | 1.5% | 2026-Q1 |
| Woodline Partners LP added | 1,112,104 | $37M | 1.4% | 2026-Q1 |
| Deep Track Capital, LP added | 1,078,710 | $36M | 1.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,025,937 | $34M | 1.3% | 2026-Q1 |
| BRAIDWELL LP trimmed | 959,259 | $32M | 1.2% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP added | 952,165 | $32M | 1.2% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 835,178 | $28M | 1.0% | 2026-Q1 |
| Vestal Point Capital, LP trimmed | 730,000 | $24M | 0.9% | 2026-Q1 |
| Commodore Capital LP trimmed | 652,432 | $22M | 0.8% | 2026-Q1 |
| Hood River Capital Management LLC added | 623,421 | $21M | 0.8% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 616,217 | $21M | 0.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 606,513 | $20M | 0.8% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 648,827 | $20M | 0.7% | 2026-Q1 |
| Catalio Capital Management, LP added | 577,808 | $19M | 0.7% | 2026-Q1 |
| KINGDON CAPITAL MANAGEMENT, L.L.C. added | 575,000 | $19M | 0.7% | 2026-Q1 |
| Kynam Capital Management, LP new | 560,000 | $19M | 0.7% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 549,877 | $18M | 0.7% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 483,884 | $16M | 0.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 477,321 | $16M | 0.6% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 447,300 | $15M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 439,902 | $15M | 0.5% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 432,535 | $14M | 0.5% | 2026-Q1 |
| Caption Management, LLC added | 420,143 | $14M | 0.5% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 405,910 | $14M | 0.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 393,523 | $13M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 386,545 | $13M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 385,798 | $13M | 0.5% | 2026-Q1 |
| Ikarian Capital, LLC added | 344,123 | $12M | 0.4% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 342,758 | $11M | 0.4% | 2026-Q1 |
| Integral Health Asset Management, LLC | 325,000 | $11M | 0.4% | 2026-Q1 |
| Vivo Capital, LLC trimmed | 294,909 | $10M | 0.4% | 2026-Q1 |
| Aberdeen Group plc | 287,456 | $10M | 0.4% | 2026-Q1 |
| Candriam S.C.A. new | 281,620 | $9M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 277,851 | $9M | 0.3% | 2026-Q1 |
| EMERALD ADVISERS, LLC trimmed | 274,138 | $9M | 0.3% | 2026-Q1 |
| Penn Capital Management Company, LLC trimmed | 268,785 | $9M | 0.3% | 2026-Q1 |
| Rock Springs Capital Management LP added | 257,253 | $9M | 0.3% | 2026-Q1 |
| Logos Global Management LP trimmed | 250,000 | $8M | 0.3% | 2026-Q1 |
| PFM Health Sciences, LP added | 248,180 | $8M | 0.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 242,262 | $8M | 0.3% | 2026-Q1 |
| UBS Group AG added | 225,147 | $8M | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 221,928 | $7M | 0.3% | 2026-Q1 |
| MARSHALL WACE, LLP added | 221,214 | $7M | 0.3% | 2026-Q1 |
| Alyeska Investment Group, L.P. | 217,500 | $7M | 0.3% | 2026-Q1 |
| SPHERA FUNDS MANAGEMENT LTD. added | 216,281 | $7M | 0.3% | 2026-Q1 |
| RICE HALL JAMES & ASSOCIATES, LLC new | 206,147 | $7M | 0.3% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 203,291 | $7M | 0.3% | 2026-Q1 |
| EMERALD MUTUAL FUND ADVISERS TRUST trimmed | 200,727 | $7M | 0.2% | 2026-Q1 |
| Ally Bridge Group (NY) LLC added | 200,000 | $7M | 0.2% | 2026-Q1 |
| National Philanthropic Trust added | 200,000 | $7M | 0.2% | 2026-Q1 |
| Boxer Capital Management, LLC new | 200,000 | $7M | 0.2% | 2026-Q1 |
| SEB Asset Management AB new | 187,475 | $6M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 185,337 | $6M | 0.2% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 185,317 | $6M | 0.2% | 2026-Q1 |
| Buckley Capital Advisors, LLC added | 181,750 | $6M | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 174,204 | $6M | 0.2% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 2,664,133 | $123M | 4.6% | 2025-Q4 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 1,401,576 | $95M | 3.5% | 2025-Q3 stale |
| Carlyle Group Inc. | 860,980 | $72M | 2.7% | 2025-Q2 stale |
| Holocene Advisors, LP trimmed | 997,069 | $67M | 2.5% | 2025-Q3 stale |
| Point72 Asset Management, L.P. added | 915,995 | $65M | 2.4% | 2025-Q1 stale |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 899,157 | $61M | 2.2% | 2025-Q3 stale |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. added | 502,374 | $42M | 1.6% | 2025-Q2 stale |
| PERCEPTIVE ADVISORS LLC trimmed | 430,439 | $36M | 1.3% | 2025-Q2 stale |
| Frazier Life Sciences Management, L.P. trimmed | 499,159 | $36M | 1.3% | 2025-Q1 stale |
| RTW INVESTMENTS, LP new | 424,408 | $36M | 1.3% | 2025-Q2 stale |
| EVENTIDE ASSET MANAGEMENT, LLC new | 467,435 | $32M | 1.2% | 2025-Q3 stale |
| Siren, L.L.C. | 467,342 | $32M | 1.2% | 2025-Q3 stale |
| SAMLYN CAPITAL, LLC added | 466,175 | $32M | 1.2% | 2025-Q3 stale |
| Tri Locum Partners LP added | 450,585 | $30M | 1.1% | 2025-Q3 stale |
| TimesSquare Capital Management, LLC added | 377,566 | $26M | 0.9% | 2025-Q3 stale |
| JENNISON ASSOCIATES LLC new | 349,071 | $24M | 0.9% | 2025-Q3 stale |
| SOROS FUND MANAGEMENT LLC added | 270,663 | $19M | 0.7% | 2025-Q1 stale |
| GREAT POINT PARTNERS LLC added | 400,000 | $19M | 0.7% | 2025-Q4 stale |
| Assenagon Asset Management S.A. added | 384,166 | $18M | 0.7% | 2025-Q4 stale |
| Allspring Global Investments Holdings, LLC added | 280,984 | $17M | 0.6% | 2025-Q3 stale |
| TCG Crossover Management, LLC trimmed | 186,250 | $16M | 0.6% | 2025-Q2 stale |
| Affinity Asset Advisors, LLC added | 200,000 | $14M | 0.5% | 2025-Q3 stale |
| Checkpoint Capital L.P. added | 172,902 | $12M | 0.5% | 2025-Q1 stale |
| Balyasny Asset Management L.P. trimmed | 227,751 | $11M | 0.4% | 2025-Q4 stale |
| MPM BIOIMPACT LLC added | 150,000 | $10M | 0.4% | 2025-Q3 stale |
| Atika Capital Management LLC added | 120,500 | $10M | 0.4% | 2025-Q2 stale |
| Skandinaviska Enskilda Banken AB (publ) added | 187,475 | $9M | 0.3% | 2025-Q4 stale |
| Clark Capital Management Group, Inc. new | 180,250 | $8M | 0.3% | 2025-Q4 stale |
| First Turn Management, LLC added | 86,332 | $7M | 0.3% | 2025-Q2 stale |
| Capital World Investors trimmed | 145,522 | $7M | 0.2% | 2025-Q4 stale |
| Eagle Health Investments LP new | 135,100 | $6M | 0.2% | 2025-Q4 stale |
| ROYCE & ASSOCIATES LP added | 129,043 | $6M | 0.2% | 2025-Q4 stale |
| Nan Fung Group Holdings Ltd | 79,650 | $6M | 0.2% | 2025-Q1 stale |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 119,695 | $6M | 0.2% | 2025-Q4 stale |
| PEREGRINE CAPITAL MANAGEMENT LLC added | 119,564 | $6M | 0.2% | 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.