Monte Rosa Therapeutics, Inc.: which funds bought and sold
Institutions that bought and sold Monte Rosa Therapeutics 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, 109 institutions that filed 13F reports for both quarters added to or opened positions in Monte Rosa Therapeutics, and 82 cut or closed them. Together they added a net 6.0M shares, +7.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.7M shares (+4.9%); index fund managers were net buyers of 2.5M shares (+15.3%). 28 opened a new position and 23 sold out entirely.
Bought, Q2 2026 109 institutions, 28 of them new holders Sold, Q2 2026 82 institutions, 23 of them sold out
Net change, all compared +6.0M shares (+7.0%)
Net change, active managers +1.7M shares (+4.9%), 21 bought, 22 sold
Buyers versus sellers
109 bought 24 82 sold
Active managers and hedge funds 21 bought · 22 sold · +1.7M
Index fund managers 9 bought · 2 sold · +2.5M
Other institutions 79 bought · 58 sold · +1.9M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | +2.1M +31.9% | 8.9M | $214M |
| Blackrock, Inc. Index funds | +1.2M +21.4% | 6.8M | $166M |
| Vestal Point Capital, LP Hedge fund | +997K +27.7% | 4.6M | $111M |
| Woodline Partners LP Hedge fund | +888K +1192.5% | 963K | $23.3M |
| Opaleye Management Inc. | +745K New position | 745K | $18M |
| Nantahala Capital Management, LLC Hedge fund | +652K +100.0% | 1.3M | $31.6M |
| First Trust Advisors LP | +648K New position | 648K | $15.7M |
| Boone Capital Management LLC | +615K New position | 615K | $14.9M |
| Nextech Invest Ltd. | +457K +150.2% | 761K | $18.4M |
| State Street Corp Index funds | +377K +11.3% | 3.7M | $90.3M |
| Kennedy Capital Management LLC Active manager | +374K +1168.2% | 406K | $9.8M |
| Ameriprise Financial Inc | +347K +964.9% | 383K | $9.3M |
| Geode Capital Management, LLC Index funds | +323K +21.0% | 1.9M | $45.1M |
| Vanguard Capital Management LLC Index funds | +313K +10.1% | 3.4M | $82.6M |
| Duquesne Family Office LLC Hedge fund | +298K New position | 298K | $7.2M |
| Vanguard Portfolio Management LLC Index funds | +276K +53.5% | 792K | $19.2M |
| Longaeva Partners L.P. | +217K New position | 217K | $5.2M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +200K +80.0% | 450K | $10.9M |
| Marshall Wace, LLP Hedge fund | +160K +11.2% | 1.6M | $38.6M |
| Stempoint Capital LP | +154K New position | 154K | $3.7M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Price T Rowe Associates Inc Active manager | +2.1M +31.9% | 8.9M | $214M |
| Vestal Point Capital, LP Hedge fund | +997K +27.7% | 4.6M | $111M |
| Woodline Partners LP Hedge fund | +888K +1192.5% | 963K | $23.3M |
| Nantahala Capital Management, LLC Hedge fund | +652K +100.0% | 1.3M | $31.6M |
| Kennedy Capital Management LLC Active manager | +374K +1168.2% | 406K | $9.8M |
| Duquesne Family Office LLC Hedge fund | +298K New position | 298K | $7.2M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +200K +80.0% | 450K | $10.9M |
| Marshall Wace, LLP Hedge fund | +160K +11.2% | 1.6M | $38.6M |
| Two Sigma Investments, LP Hedge fund | +122K +630.2% | 141K | $3.4M |
| Exoduspoint Capital Management, LP Hedge fund | +121K New position | 121K | $2.9M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| American Century Companies Inc Active manager | −1.2M −42.2% | 1.6M | $39.3M |
| Silverarc Capital Management, LLC | −894K −44.6% | 1.1M | $26.8M |
| Braidwell LP Hedge fund | −755K −23.5% | 2.5M | $59.3M |
| Montanova Capital, LLC Hedge fund | −677K −16.0% | 3.5M | $85.9M |
| Arrowstreet Capital, Limited Partnership Hedge fund | −648K Sold out | 0 | — |
| Cormorant Asset Management, LP Hedge fund | −400K Sold out | 0 | — |
| Alphabet Inc. | −312K −45.6% | 372K | $9M |
| Renaissance Technologies LLC Hedge fund | −277K −73.0% | 103K | $2.5M |
| Millennium Management LLC Hedge fund | −191K Sold out | 0 | — |
| Northern Trust Corp Index funds | −175K −21.1% | 652K | $15.8M |
| J. Goldman & Co LP Hedge fund | −157K −91.2% | 15K | $365,880 |
| Jump Financial, LLC | −150K −81.1% | 35K | $844,580 |
| AQR Capital Management LLC Hedge fund | −138K −20.9% | 521K | $12.6M |
| Bank Of America Corp | −133K −34.3% | 255K | $6.2M |
| Diadema Partners LP | −109K −58.1% | 78K | $1.9M |
| Openarc Corporate Advisory, LLC | −100K Sold out | 0 | — |
| Informed Momentum Co LLC | −100K −76.6% | 30K | $736,067 |
| Citadel Advisors LLC Hedge fund | −91K −35.7% | 164K | $4M |
| FMR LLC Active manager | −90K −8.8% | 934K | $22.6M |
| Atom Investors LP | −83K −42.9% | 111K | $2.7M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| American Century Companies Inc Active manager | −1.2M −42.2% | 1.6M | $39.3M |
| Braidwell LP Hedge fund | −755K −23.5% | 2.5M | $59.3M |
| Montanova Capital, LLC Hedge fund | −677K −16.0% | 3.5M | $85.9M |
| Arrowstreet Capital, Limited Partnership Hedge fund | −648K Sold out | 0 | — |
| Cormorant Asset Management, LP Hedge fund | −400K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −277K −73.0% | 103K | $2.5M |
| Millennium Management LLC Hedge fund | −191K Sold out | 0 | — |
| J. Goldman & Co LP Hedge fund | −157K −91.2% | 15K | $365,880 |
| AQR Capital Management LLC Hedge fund | −138K −20.9% | 521K | $12.6M |
| Citadel Advisors LLC Hedge fund | −91K −35.7% | 164K | $4M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Opaleye Management Inc. | 745K | $18M |
| First Trust Advisors LP | 648K | $15.7M |
| Boone Capital Management LLC | 615K | $14.9M |
| Duquesne Family Office LLCHedge fund | 298K | $7.2M |
| Longaeva Partners L.P. | 217K | $5.2M |
| Stempoint Capital LP | 154K | $3.7M |
| Exoduspoint Capital Management, LPHedge fund | 121K | $2.9M |
| Caption Management, LLC | 112K | $2.7M |
| Jain Global LLCHedge fund | 111K | $2.7M |
| Tetragon Partners Gp Ltd | 56K | $1.4M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Arrowstreet Capital, Limited PartnershipHedge fund | 648K | $10.7M |
| Cormorant Asset Management, LPHedge fund | 400K | $6.6M |
| Millennium Management LLCHedge fund | 191K | $3.1M |
| Openarc Corporate Advisory, LLC | 100K | $1.6M |
| Acadian Asset Management LLCActive manager | 79K | $1.3M |
| Hussman Strategic Advisors, Inc. | 63K | $1M |
| Prelude Capital Management, LLC | 43K | $715,131 |
| Allstate Corp | 28K | $459,876 |
| Jefferies Financial Group Inc. | 28K | $452,474 |
| Omers Administration Corp | 27K | $445,795 |
Who holds the shares
- Institutions reporting
- 193
- Ten largest holders
- 55.8% of 13F-reported shares
- Index fund managers
- 19.9% of 13F-reported shares
- Active managers and hedge funds
- 37.7% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 21 | 22 | 4 | 8 | +1.7M | +4.9% |
| Index fund managers | 9 | 2 | 0 | 0 | +2.5M | +15.3% |
| Other institutions | 79 | 58 | 24 | 15 | +1.9M | +5.2% |
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