Who owns SORN (SORN)
Which tracked institutional funds hold SORN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SORN 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.
Conviction spread
SORN’s largest tracked holder by dollar value, ADAGE CAPITAL PARTNERS GP, L.L.C., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes SORN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in SORN 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
Only one quarter (2026-Q1) of 13F history is available — a quarter-over-quarter accumulation delta needs two.
We do not publish a positioning read for a window we cannot measure honestly. A starting question, not a verdict.
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.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 1,980,000 | $20M | 11.2% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 1,850,000 | $18M | 10.5% | 2026-Q1 |
| Magnetar Financial LLC new | 1,749,993 | $17M | 9.8% | 2026-Q1 |
| Linden Advisors LP new | 1,600,000 | $16M | 9.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. new | 1,252,000 | $12M | 7.1% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. new | 1,125,000 | $11M | 6.4% | 2026-Q1 |
| AQR Arbitrage LLC new | 859,830 | $8M | 4.9% | 2026-Q1 |
| Alberta Investment Management Corp new | 850,000 | $8M | 4.8% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. new | 787,763 | $8M | 4.5% | 2026-Q1 |
| Shaolin Capital Management LLC new | 549,300 | $5M | 3.1% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC new | 499,995 | $5M | 2.8% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS new | 460,161 | $5M | 2.6% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC new | 450,000 | $4M | 2.5% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP new | 400,000 | $4M | 2.3% | 2026-Q1 |
| WHITEBOX ADVISORS LLC new | 400,000 | $4M | 2.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP new | 398,750 | $4M | 2.3% | 2026-Q1 |
| MARSHALL WACE, LLP new | 300,000 | $3M | 1.7% | 2026-Q1 |
| Periscope Capital Inc. new | 274,500 | $3M | 1.6% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND new | 250,000 | $2M | 1.4% | 2026-Q1 |
| Ghisallo Capital Management LLC new | 250,000 | $2M | 1.4% | 2026-Q1 |
| GLAZER CAPITAL, LLC new | 201,353 | $2M | 1.1% | 2026-Q1 |
| Verition Fund Management LLC new | 200,000 | $2M | 1.1% | 2026-Q1 |
| Clear Street Group Inc. new | 146,062 | $1M | 0.8% | 2026-Q1 |
| L1 Global Manager Pty Ltd new | 120,000 | $1M | 0.7% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 100,000 | $988K | 0.6% | 2026-Q1 |
| DLD Asset Management, LP new | 100,000 | $988K | 0.6% | 2026-Q1 |
| Kepos Capital LP new | 94,998 | $939K | 0.5% | 2026-Q1 |
| Mint Tower Capital Management B.V. new | 75,000 | $741K | 0.4% | 2026-Q1 |
| Virtu Financial LLC new | 71,248 | $703K | 0.4% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. new | 66,060 | $655K | 0.4% | 2026-Q1 |
| Radcliffe Capital Management, L.P. new | 64,517 | $637K | 0.4% | 2026-Q1 |
| DELTEC ASSET MANAGEMENT LLC new | 49,950 | $494K | 0.3% | 2026-Q1 |
| BERKLEY W R CORP new | 42,780 | $423K | 0.2% | 2026-Q1 |
| ABC ARBITRAGE SA new | 40,000 | $395K | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC new | 25,722 | $254K | 0.1% | 2026-Q1 |
| TORONTO DOMINION BANK new | 10,296 | $102K | 0.1% | 2026-Q1 |
| PenderFund Capital Management Ltd. new | 5,000 | $49K | 0.0% | 2026-Q1 |
| MORGAN STANLEY new | 12 | $119 | 0.0% | 2026-Q1 |
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.