Who owns STSS (STSS)
Which tracked institutional funds hold STSS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See STSS 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
5 tracked funds added or opened STSS while 8 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
STSS’s largest tracked holder by dollar value, Electric Capital Partners, LLC, sizes it at 8.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 8.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in STSS 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 36 tracked filers holding STSS, 23 increased or opened the position and 14 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 STSS 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 3
- ParaFi Capital LP$6M
- VANGUARD CAPITAL MANAGEMENT LLC$2M
- CITADEL ADVISORS LLC$1M
Full exits 2
- HBK INVESTMENTS L P$1M
- VANGUARD GROUP INC$1M
Largest adds
- Saba Capital Management, L.P.$2M
- UBS Group AG$443K
Largest trims
- Schonfeld Strategic Advisors LLC$3M
- Electric Capital Partners, LLC$2M
- SCOGGIN MANAGEMENT LP$654K
- CoinFund Management LLC$429K
- Feynman Point Asset Management LLC$420K
- Pantera Capital Partners LP$402K
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 |
|---|---|---|---|---|
| Electric Capital Partners, LLC | 6,153,846 | $10M | 35.4% | 2026-Q1 |
| Saba Capital Management, L.P. added | 1,511,988 | $3M | 8.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,166,993 | $2M | 6.7% | 2026-Q1 |
| ParaFi Capital LP new | 1,150,000 | $2M | 6.6% | 2026-Q1 |
| Pantera Capital Partners LP | 1,150,000 | $2M | 6.6% | 2026-Q1 |
| SCOGGIN MANAGEMENT LP trimmed | 1,000,000 | $2M | 5.8% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 873,957 | $1M | 5.0% | 2026-Q1 |
| Feynman Point Asset Management LLC trimmed | 405,000 | $680K | 2.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 341,371 | $574K | 2.0% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC new | 173,904 | $292K | 1.0% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 164,483 | $276K | 0.9% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. new | 153,839 | $258K | 0.9% | 2026-Q1 |
| STATE STREET CORP added | 118,800 | $200K | 0.7% | 2026-Q1 |
| BlackRock, Inc. | 94,538 | $159K | 0.5% | 2026-Q1 |
| Cannell & Spears LLC new | 84,138 | $141K | 0.5% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 67,874 | $114K | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP | 60,692 | $102K | 0.3% | 2026-Q1 |
| Quadrature Capital Ltd new | 51,074 | $86K | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 40,324 | $68K | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 36,282 | $61K | 0.2% | 2026-Q1 |
| Walleye Capital LLC | 1,045,368 | $38K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 20,800 | $35K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 15,766 | $26K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 538,974 | $20K | 0.1% | 2026-Q1 |
| MORGAN STANLEY | 8,649 | $15K | 0.0% | 2026-Q1 |
| CoinFund Management LLC | 215,385 | $8K | 0.0% | 2026-Q1 |
| Creative Planning added | 110,000 | $4K | 0.0% | 2026-Q1 |
| GROUP ONE TRADING LLC new | 700 | $1K | 0.0% | 2026-Q1 |
| SIMPLEX TRADING, LLC added | 456 | $766 | 0.0% | 2026-Q1 |
| Cetera Investment Advisers | 16,500 | $607 | 0.0% | 2026-Q1 |
| UBS Group AG added | 11,022 | $408 | 0.0% | 2026-Q1 |
| HM PAYSON & CO trimmed | 30 | $51 | 0.0% | 2026-Q1 |
| Ascentis Wealth Management, LLC new | 15 | $25 | 0.0% | 2026-Q1 |
| Caitong International Asset Management Co., Ltd new | 5 | $8 | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 1 | $2 | 0.0% | 2026-Q1 |
| Arrington Capital Management, LLC | 923,076 | — | 0.0% | 2026-Q1 |
| HBK INVESTMENTS L P new | 769,231 | $1M | 5.0% | 2025-Q4 stale |
| VANGUARD GROUP INC added | 521,632 | $1M | 3.6% | 2025-Q4 stale |
| Altium Capital Management LLC new | 18,737,471 | $560K | 1.9% | 2025-Q1 stale |
| OMERS ADMINISTRATION Corp new | 81,332 | $530K | 1.8% | 2025-Q3 stale |
| SABBY MANAGEMENT, LLC new | 11,722,215 | $350K | 1.2% | 2025-Q1 stale |
| T3 Companies, LLC new | 33,540 | $68K | 0.2% | 2025-Q4 stale |
| Anson Funds Management LP added | 1,800,000 | $54K | 0.2% | 2025-Q1 stale |
| Aristides Capital LLC new | 12,100 | $25K | 0.1% | 2025-Q4 stale |
| Engineers Gate Manager LP new | 11,182 | $23K | 0.1% | 2025-Q4 stale |
| CLEAR STREET LLC trimmed | 597,677 | $18K | 0.1% | 2025-Q2 stale |
| Tower Research Capital LLC (TRC) added | 1,721 | $11K | 0.0% | 2025-Q3 stale |
| Royal Bank of Canada new | 843 | $5K | 0.0% | 2025-Q2 stale |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 500 | $3K | 0.0% | 2025-Q3 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 100,900 | $3K | 0.0% | 2025-Q1 stale |
| TWO SIGMA INVESTMENTS, LP new | 27,682 | $828 | 0.0% | 2025-Q1 stale |
| GOLDMAN SACHS GROUP INC new | 25,215 | $754 | 0.0% | 2025-Q1 stale |
| Riverview Capital Advisers, LLC new | 22,637 | $677 | 0.0% | 2025-Q2 stale |
| BANK OF AMERICA CORP /DE/ trimmed | 241 | $489 | 0.0% | 2025-Q4 stale |
| TWO SIGMA SECURITIES, LLC trimmed | 10,585 | $300 | 0.0% | 2025-Q4 stale |
| ORG Partners LLC | 15 | $30 | 0.0% | 2025-Q4 stale |
| JPMORGAN CHASE & CO new | 57 | $2 | 0.0% | 2025-Q1 stale |
| OSAIC HOLDINGS, INC. | 45 | $1 | 0.0% | 2025-Q1 stale |
| Avion Wealth new | 357 | — | 0.0% | 2025-Q4 stale |
| Virtu Financial LLC trimmed | 12,184 | — | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 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.