Alpha Tau Medical Ltd. (DRTS) Ownership
DRTS ownership summary
as of October 17, 2026- Institutions
- 9.2% of shares outstanding
- Insiders
- 30.50% of shares outstanding
- Shares outstanding
- 92.5M
- Float
- 64.1M shares available to trade
- Short interest
- 5.36% 3.4M shares short
- Days to cover
- 5.49 short interest down 1.0% vs prior month
- Institutions 9.18%
- Insiders 30.50%
- Other investors 60.31%
DRTS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Gem Investment Advisors, LLC | 1.55% | 1.4M | $17.6M | +1.3M (+1,161.2%) | June 30, 2026 |
| 2 | HighTower Advisors, LLC | 0.95% | 875K | $10.8M | — | June 30, 2026 |
| 3 | BOOTHBAY FUND MANAGEMENT, LLC | 0.84% | 773K | $9.5M | +773,481 (0.0%) | June 30, 2026 |
| 4 | Aquamarine Financial (Cayman) Ltd | 0.78% | 722K | $8.9M | — | June 30, 2026 |
| 5 | Pier Capital, LLC | 0.75% | 692K | $8.5M | +691,939 (0.0%) | June 30, 2026 |
| 6 | UBS Group AG | 0.69% | 642K | $7.9M | +355,575 (+124.0%) | June 30, 2026 |
| 7 | Apella Capital, LLC | 0.41% | 382K | $4.7M | — | June 30, 2026 |
| 8 | ARK Investment Management LLC | 0.30% | 277K | $3.4M | −15,048 (−5.2%) | June 30, 2026 |
| 9 | Polen Capital | 0.24% | 221K | $2.7M | +220,751 (0.0%) | June 30, 2026 |
| 10 | The Colony Group LLC | 0.20% | 185K | $2.3M | +152,461 (+472.5%) | June 30, 2026 |
| 11 | Mariner Wealth Advisors LLC | 0.18% | 167K | $2.1M | +20,690 (+14.1%) | June 30, 2026 |
| 12 | Daytona Street Capital LLC | 0.16% | 146K | $1.8M | — | June 30, 2026 |
| 13 | Kovitz Investment Group Partners, LLC | 0.15% | 135K | $1.7M | −12,121 (−8.2%) | June 30, 2026 |
| 14 | Easterly Investment Partners. | 0.14% | 129K | $1.6M | +22,171 (+20.8%) | June 30, 2026 |
| 15 | Wells Fargo & Co | 0.11% | 106K | $1.3M | +56,550 (+114.7%) | June 30, 2026 |
| 16 | Jane Street Group LLC | 0.10% | 91K | $1.1M | +15,606 (+20.7%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.07% | 62K | $756,560 | +26,164 (+73.9%) | June 30, 2026 |
| 18 | Dauntless Investment Group, LLC | 0.07% | 61K | $752,148 | +61,200 (0.0%) | June 30, 2026 |
| 19 | Susquehanna International Group, LLP | 0.06% | 55K | $673,086 | +22,029 (+67.3%) | June 30, 2026 |
| 20 | Geode Capital Management, LLC | 0.06% | 53K | $656,274 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 3.7M shares and 2 cut 27K.
DRTS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core MSCI EAFE ETF | 0.51% | 471K | $5.8M | +1,425 (+0.3%) | September 30, 2026 |
| 2 | SEB Nordamerikafond Småbolag | 0.30% | 275K | $3.4M | — | August 31, 2026 |
| 3 | iShares MSCI EAFE Small-Cap ETF | 0.23% | 217K | $2.7M | — | September 29, 2026 |
| 4 | ARK Israel Innovative Technology ETF | 0.20% | 184K | $2.3M | — | September 30, 2026 |
| 5 | Adara Smaller Companies | 0.15% | 135K | $1.7M | +5,341 (+4.1%) | August 31, 2026 |
| 6 | iShares MSCI Israel ETF | 0.14% | 133K | $1.6M | — | September 23, 2026 |
| 7 | Dunham Small Cap Growth N | 0.08% | 70K | $865,880 | −1,206 (−1.7%) | August 31, 2026 |
| 8 | iShares Core MSCI Total Intl Stk ETF | 0.07% | 63K | $768,248 | — | September 30, 2026 |
| 9 | iShares MSCI World Small Cap ETF USD Acc | 0.06% | 55K | $671,943 | — | September 30, 2026 |
| 10 | Fidelity Nasdaq Composite Index | 0.06% | 53K | $656,274 | — | August 31, 2026 |
| 11 | State Street® SPDR® S&P® Intl Sm Cp ETF | 0.04% | 38K | $464,562 | — | September 30, 2026 |
| 12 | Fidelity Nasdaq Composite ETF | 0.03% | 31K | $386,631 | — | September 30, 2026 |
| 13 | Even Herd Long Short ETF | 0.03% | 25K | $307,053 | — | September 30, 2026 |
| 14 | Timber Point Global Allocations Instl | 0.02% | 20K | $245,800 | +20,000 (0.0%) | June 30, 2026 |
| 15 | SWC (CH) IPF I IEF SmCp Wld ex CH NT CHF | 0.02% | 15K | $182,015 | +14,810 (0.0%) | August 31, 2026 |
| 16 | KLP AksjeGlobal Small Cap Indeks S | 0.02% | 14K | $176,976 | — | September 30, 2026 |
| 17 | BlackRock Global Equity Mkt Netrl Instl | 0.01% | 14K | $170,671 | −5,463 (−28.2%) | July 31, 2026 |
| 18 | UBS (CH) IF - Eq W ex CH Sm NSL I-B-acc | 0.01% | 10K | $122,900 | — | September 30, 2026 |
| 19 | UBS (CH) IF 3 - EW ex CH Sm NSL MI I-B | 0.01% | 9,800 | $120,442 | — | September 30, 2026 |
| 20 | Avantis Responsible International Eq ETF | 0.01% | 7,406 | $91,020 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
DRTS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns DRTS
Institutional investors own 9.2% of Alpha Tau Medical's shares and insiders 30.50%. The largest holder is Gem Investment Advisors, LLC with 1.55% of the shares (1.4M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 2 reduced their stake in the latest filings. Short interest is 5.36% of the float, or 5.49 days of average trading volume. The share count rose 26.7% since 2019.
Related: DRTS analyst forecast, DRTS key metrics. See the DRTS stock overview for the latest quote and news.
DRTS ownership FAQ
Who owns the most Alpha Tau Medical stock?
The largest shareholders of Alpha Tau Medical are Gem Investment Advisors, LLC (1.55%), HighTower Advisors, LLC (0.95%), BOOTHBAY FUND MANAGEMENT, LLC (0.84%), Aquamarine Financial (Cayman) Ltd (0.78%), Pier Capital, LLC (0.75%).
What percentage of Alpha Tau Medical is owned by institutions?
Institutions hold 9.2% of Alpha Tau Medical's shares outstanding; insiders hold 30.50%.
Which funds own Alpha Tau Medical?
The largest fund holders of Alpha Tau Medical are iShares Core MSCI EAFE ETF (0.51%), SEB Nordamerikafond Småbolag (0.30%), iShares MSCI EAFE Small-Cap ETF (0.23%), ARK Israel Innovative Technology ETF (0.20%), Adara Smaller Companies (0.15%).
What is Alpha Tau Medical's short interest?
3.4M shares of Alpha Tau Medical were sold short, 5.36% of the float; at the average daily volume it would take 5.49 days to cover.
How many shares of Alpha Tau Medical are outstanding?
Alpha Tau Medical has 92.5M shares outstanding, of which 64.1M are in the public float.