Alpha Tau Medical Ltd.: which funds bought and sold
Institutions that bought and sold Alpha Tau Medical shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 42 institutions that filed 13F reports for both quarters added to or opened positions in Alpha Tau Medical, and 16 cut or closed them. Together they added a net 3.8M shares, +94.7% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.0M shares (+187.3%); index fund managers were net sellers of 588 shares (−0.6%). 24 opened a new position and 6 sold out entirely.
Bought, Q2 2026 42 institutions, 24 of them new holders Sold, Q2 2026 16 institutions, 6 of them sold out
Net change, all compared +3.8M shares (+94.7%)
Net change, active managers +1.0M shares (+187.3%), 8 bought, 3 sold
Buyers versus sellers
42 bought 19 16 sold
Active managers and hedge funds 8 bought · 3 sold · +1.0M
Index fund managers 0 bought · 1 sold · −588
Other institutions 34 bought · 12 sold · +2.8M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Gem Investment Advisors, LLC | +1.3M +1161.2% | 1.4M | $18M |
| Boothbay Fund Management, LLC Hedge fund | +773K New position | 773K | $9.7M |
| Pier Capital, LLC | +692K New position | 692K | $8.7M |
| UBS Group AG | +356K +124.0% | 642K | $8.1M |
| Polen Capital Management LLC Active manager | +221K New position | 221K | $2.8M |
| Focus Partners Wealth | +152K +472.5% | 185K | $2.3M |
| Wells Fargo & Company | +57K +114.7% | 106K | $1.3M |
| Scientech Research LLC | +46K New position | 46K | $575,560 |
| Susquehanna Portfolio Strategies, LLC | +46K New position | 46K | $574,843 |
| Concentric Capital Strategies, LP | +44K New position | 44K | $554,489 |
| Cambridge Investment Research Advisors, Inc. | +28K New position | 28K | $358,000 |
| Citadel Advisors LLC Hedge fund | +26K +73.9% | 62K | $774,412 |
| Levin Capital Strategies, L.P. Active manager | +22K +20.8% | 129K | $1.6M |
| Susquehanna International Group, LLP | +22K +67.3% | 55K | $688,969 |
| Mariner, LLC | +21K +14.1% | 167K | $2.1M |
| Squarepoint Ops LLC Hedge fund | +21K New position | 21K | $259,840 |
| Engineers Gate Manager LP Hedge fund | +19K New position | 19K | $245,297 |
| Morgan Stanley | +18K +73.1% | 42K | $532,814 |
| Catalyst Funds Management Pty Ltd | +17K New position | 17K | $207,570 |
| Corient Private Wealth LP | +16K New position | 16K | $201,733 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Boothbay Fund Management, LLC Hedge fund | +773K New position | 773K | $9.7M |
| Polen Capital Management LLC Active manager | +221K New position | 221K | $2.8M |
| Citadel Advisors LLC Hedge fund | +26K +73.9% | 62K | $774,412 |
| Levin Capital Strategies, L.P. Active manager | +22K +20.8% | 129K | $1.6M |
| Squarepoint Ops LLC Hedge fund | +21K New position | 21K | $259,840 |
| Engineers Gate Manager LP Hedge fund | +19K New position | 19K | $245,297 |
| Two Sigma Investments, LP Hedge fund | +14K New position | 14K | $169,893 |
| Quantbot Technologies LP Hedge fund | +9,127 New position | 9,127 | $114,818 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | −46K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −40K Sold out | 0 | — |
| Goldman Sachs Group Inc | −26K Sold out | 0 | — |
| Bank Of America Corp | −22K −52.2% | 20K | $248,707 |
| ARK Investment Management LLC Active manager | −15K −5.2% | 277K | $3.5M |
| Northcoast Asset Management LLC | −12K −8.2% | 135K | $1.7M |
| Summit Financial, LLC | −10K −34.8% | 20K | $246,191 |
| Jpmorgan Chase & Co | −5,020 Sold out | 0 | — |
| Xtx Topco Ltd | −4,679 −24.6% | 14K | $180,397 |
| Satovsky Asset Management LLC | −4,070 −10.0% | 37K | $460,881 |
| Trifecta Capital Advisors, LLC | −950 −9.8% | 8,750 | $110,075 |
| Altshuler Shaham Ltd | −800 −34.8% | 1,500 | $18,870 |
| Blackrock, Inc. Index funds | −588 −11.1% | 4,692 | $59,025 |
| Tidal Investments LLC | −436 −1.7% | 25K | $310,185 |
| Group One Trading LLC | −100 Sold out | 0 | — |
| Caitong International Asset Management Co., Ltd | −68 Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | −46K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −40K Sold out | 0 | — |
| ARK Investment Management LLC Active manager | −15K −5.2% | 277K | $3.5M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Boothbay Fund Management, LLCHedge fund | 773K | $9.7M |
| Pier Capital, LLC | 692K | $8.7M |
| Polen Capital Management LLCActive manager | 221K | $2.8M |
| Scientech Research LLC | 46K | $575,560 |
| Susquehanna Portfolio Strategies, LLC | 46K | $574,843 |
| Concentric Capital Strategies, LP | 44K | $554,489 |
| Cambridge Investment Research Advisors, Inc. | 28K | $358,000 |
| Squarepoint Ops LLCHedge fund | 21K | $259,840 |
| Engineers Gate Manager LPHedge fund | 19K | $245,297 |
| Catalyst Funds Management Pty Ltd | 17K | $207,570 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Millennium Management LLCHedge fund | 46K | $328,366 |
| Renaissance Technologies LLCHedge fund | 40K | $286,031 |
| Goldman Sachs Group Inc | 26K | $185,156 |
| Jpmorgan Chase & Co | 5,020 | $32,881 |
| Group One Trading LLC | 100 | $707 |
| Caitong International Asset Management Co., Ltd | 68 | $481 |
Who holds the shares
- Institutions reporting
- 73
- Ten largest holders
- 77.9% of 13F-reported shares
- Index fund managers
- 1.1% of 13F-reported shares
- Active managers and hedge funds
- 19.3% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 8 | 3 | 6 | 2 | +1.0M | +187.3% |
| Index fund managers | 0 | 1 | 0 | 0 | −588 | −0.6% |
| Other institutions | 34 | 12 | 18 | 4 | +2.8M | +82.8% |