Who owns Alpha Tau Medical (DRTS)
Which tracked institutional funds hold DRTS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See DRTS company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-17). 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 DRTS is one-sided between 2026-Q1 and 2026-Q2: 31 added or opened and 2 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
DRTS’s largest tracked holder by dollar value, Context Capital Management, LLC, sizes it at 2.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 2.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in DRTS 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 82 tracked filers holding DRTS, 42 increased or opened the position and 18 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 DRTS 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 7
- BOOTHBAY FUND MANAGEMENT, LLC$10M
- Pier Capital, LLC$9M
- POLEN CAPITAL MANAGEMENT LLC$3M
- Dauntless Investment Group, LLC$770K
- Scientech Research LLC$576K
- Susquehanna Portfolio Strategies, LLC$575K
Full exits 1
- HighTower Advisors, LLC$6M
Largest adds
- Gem Investment Advisors, LLC$17M
- UBS Group AG$6M
- LMR Partners LLP$4M
- Aquamarine Financial (Cayman) Ltd$4M
- Focus Partners Wealth$2M
- Apella Capital, LLC$2M
Largest trims
- Fisher Funds Management LTD$942K
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 |
|---|---|---|---|---|
| Gem Investment Advisors, LLC added | 1,434,476 | $18M | 13.5% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 773,481 | $10M | 7.3% | 2026-Q2 |
| Aquamarine Financial (Cayman) Ltd | 721,501 | $9M | 6.8% | 2026-Q2 |
| Pier Capital, LLC new | 691,939 | $9M | 6.5% | 2026-Q2 |
| Fisher Funds Management LTD trimmed | 157,700 | $8M | 6.3% | 2026-Q2 |
| UBS Group AG added | 642,263 | $8M | 6.0% | 2026-Q2 |
| Apella Capital, LLC | 382,284 | $5M | 3.6% | 2026-Q2 |
| LMR Partners LLP added | 1,494,631 | $4M | 3.3% | 2026-Q2 |
| ARK Investment Management LLC trimmed | 277,086 | $3M | 2.6% | 2026-Q2 |
| POLEN CAPITAL MANAGEMENT LLC new | 220,751 | $3M | 2.1% | 2026-Q2 |
| Focus Partners Wealth added | 184,726 | $2M | 1.7% | 2026-Q2 |
| Mariner, LLC added | 167,086 | $2M | 1.6% | 2026-Q2 |
| Daytona Street Capital LLC | 146,106 | $2M | 1.4% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. added | 602,350 | $2M | 1.3% | 2026-Q2 |
| NorthCoast Asset Management LLC trimmed | 135,017 | $2M | 1.3% | 2026-Q2 |
| LEVIN CAPITAL STRATEGIES, L.P. added | 128,594 | $2M | 1.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 105,850 | $1M | 1.0% | 2026-Q2 |
| MMCAP International Inc. SPC | 447,622 | $1M | 1.0% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 91,145 | $1M | 0.9% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC added | 319,910 | $944K | 0.7% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 61,559 | $774K | 0.6% | 2026-Q2 |
| Dauntless Investment Group, LLC new | 61,200 | $770K | 0.6% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 54,767 | $689K | 0.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC | 53,399 | $672K | 0.5% | 2026-Q2 |
| Private Advisor Group, LLC | 47,583 | $599K | 0.4% | 2026-Q2 |
| Scientech Research LLC new | 45,752 | $576K | 0.4% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC new | 45,695 | $575K | 0.4% | 2026-Q2 |
| Concentric Capital Strategies, LP new | 44,077 | $554K | 0.4% | 2026-Q2 |
| MORGAN STANLEY added | 42,354 | $533K | 0.4% | 2026-Q2 |
| Cerity Partners LLC added | 40,809 | $513K | 0.4% | 2026-Q2 |
| SATOVSKY ASSET MANAGEMENT LLC trimmed | 36,636 | $461K | 0.3% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP trimmed | 150,000 | $442K | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP | 33,333 | $419K | 0.3% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 136,018 | $401K | 0.3% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 26,264 | $330K | 0.2% | 2026-Q2 |
| Tidal Investments LLC trimmed | 24,657 | $310K | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC new | 20,655 | $260K | 0.2% | 2026-Q2 |
| WOODSTOCK CORP | 20,609 | $259K | 0.2% | 2026-Q2 |
| Financial Guidance Group, Inc. | 20,000 | $252K | 0.2% | 2026-Q2 |
| Aptus Capital Advisors, LLC | 20,000 | $252K | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 19,770 | $249K | 0.2% | 2026-Q2 |
| Summit Financial, LLC trimmed | 19,570 | $246K | 0.2% | 2026-Q2 |
| Engineers Gate Manager LP new | 19,499 | $245K | 0.2% | 2026-Q2 |
| Circle Wealth Management, LLC | 80,000 | $236K | 0.2% | 2026-Q2 |
| Corient Private Wealth LP new | 17,336 | $218K | 0.2% | 2026-Q2 |
| Catalyst Funds Management Pty Ltd new | 16,500 | $208K | 0.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 69,409 | $205K | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC | 15,000 | $189K | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 14,340 | $180K | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP new | 13,505 | $170K | 0.1% | 2026-Q2 |
| Ionic Capital Management LLC trimmed | 54,286 | $160K | 0.1% | 2026-Q2 |
| IMC-Chicago, LLC new | 12,434 | $156K | 0.1% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 52,666 | $155K | 0.1% | 2026-Q2 |
| Waterloo Capital, L.P. new | 11,500 | $145K | 0.1% | 2026-Q2 |
| Opal Wealth Advisors, LLC | 10,000 | $126K | 0.1% | 2026-Q2 |
| Equitable Holdings, Inc. | 10,000 | $126K | 0.1% | 2026-Q2 |
| Everhart Financial Group, Inc. new | 10,000 | $126K | 0.1% | 2026-Q2 |
| Quantbot Technologies LP new | 9,127 | $115K | 0.1% | 2026-Q2 |
| Trifecta Capital Advisors, LLC trimmed | 8,750 | $110K | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS new | 7,360 | $93K | 0.1% | 2026-Q2 |
| Tower View Wealth Management LLC | 5,566 | $70K | 0.1% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC | 3,300 | $42K | 0.0% | 2026-Q2 |
| TD Waterhouse Canada Inc. | 2,568 | $32K | 0.0% | 2026-Q2 |
| Cohen Investment Advisors LLC | 10,000 | $30K | 0.0% | 2026-Q2 |
| Caitlin John, LLC added | 2,101 | $26K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 1,600 | $21K | 0.0% | 2026-Q2 |
| Institute for Wealth Management, LLC. new | 1,668 | $21K | 0.0% | 2026-Q2 |
| BROWN BROTHERS HARRIMAN & CO added | 1,640 | $21K | 0.0% | 2026-Q2 |
| Altshuler Shaham Ltd trimmed | 1,500 | $19K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 1,456 | $16K | 0.0% | 2026-Q2 |
| CITIGROUP INC added | 1,079 | $14K | 0.0% | 2026-Q2 |
| TORNO CAPITAL, LLC new | 3,800 | $11K | 0.0% | 2026-Q2 |
| Private Wealth Management Group, LLC | 752 | $9K | 0.0% | 2026-Q2 |
| EFG International AG | 700 | $9K | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC new | 550 | $7K | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. added | 470 | $6K | 0.0% | 2026-Q2 |
| EQUITEC PROPRIETARY MARKETS, LLC | 1,900 | $6K | 0.0% | 2026-Q2 |
| State of Wyoming new | 398 | $5K | 0.0% | 2026-Q2 |
| Stone House Investment Management, LLC new | 318 | $4K | 0.0% | 2026-Q2 |
| BARCLAYS PLC new | 233 | $3K | 0.0% | 2026-Q2 |
| IFP Advisors, Inc new | 100 | $1K | 0.0% | 2026-Q2 |
| Quarry LP new | 52 | $654 | 0.0% | 2026-Q2 |
| HighTower Advisors, LLC added | 874,994 | $6M | 4.6% | 2026-Q1 stale (1 quarter behind) |
| MILLENNIUM MANAGEMENT LLC trimmed | 46,445 | $328K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 40,457 | $286K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| Value Base Ltd. | 152,761 | $153K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 150,000 | $150K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Chicago Partners Investment Group LLC trimmed | 73,824 | $76K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| BlackRock, Inc. new | 5,280 | $37K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| JPMORGAN CHASE & CO new | 5,020 | $33K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| BESSEMER GROUP INC | 3,720 | $26K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Context Capital Management, LLC new | 55,060 | $19M | 14.0% | 2025-Q4 stale (2 quarters behind) |
| Blue Owl Capital Holdings LP added | 1,166,118 | $396K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| METEORA CAPITAL, LLC new | 980 | $333K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Quent Capital, LLC new | 20,000 | $99K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| ROBOTTI ROBERT | 50,000 | $17K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Avalon Trust Co | 14,500 | $5K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| ENVESTNET ASSET MANAGEMENT INC new | 13,765 | $62K | 0.0% | 2025-Q3 stale (3 quarters behind) |
| Atom Investors LP added | 25,773 | $80K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC | 62,666 | $15K | 0.0% | 2025-Q2 stale (4 quarters behind) |
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.