Mirum Pharmaceuticals, Inc.: which funds bought and sold
Institutions that bought and sold Mirum Pharmaceuticals 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, 185 institutions that filed 13F reports for both quarters added to or opened positions in Mirum Pharmaceuticals, and 141 cut or closed them. Together they added a net 4.2M shares, +6.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 2.6M shares (+13.9%); index fund managers were net buyers of 1.8M shares (+14.6%). 59 opened a new position and 42 sold out entirely.
Bought, Q2 2026 185 institutions, 59 of them new holders Sold, Q2 2026 141 institutions, 42 of them sold out
Net change, all compared +4.2M shares (+6.9%)
Net change, active managers +2.6M shares (+13.9%), 29 bought, 34 sold
Buyers versus sellers
185 bought 38 141 sold
Active managers and hedge funds 29 bought · 34 sold · +2.6M
Index fund managers 9 bought · 3 sold · +1.8M
Other institutions 147 bought · 104 sold · −163K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +1.7M +86.7% | 3.7M | $430M |
| Invesco Ltd. | +1.1M +378.2% | 1.4M | $160M |
| William Blair Investment Management, LLC Active manager | +1.1M +318.5% | 1.4M | $164M |
| Vanguard Portfolio Management LLC Index funds | +945K +66.0% | 2.4M | $278M |
| Price T Rowe Associates Inc Active manager | +938K +54.6% | 2.7M | $311M |
| Polar Capital Holdings PLC Active manager | +562K +198.3% | 846K | $99M |
| Blackrock, Inc. Index funds | +544K +14.1% | 4.4M | $514M |
| Ameriprise Financial Inc | +507K +231.4% | 727K | $85.1M |
| Franklin Resources Inc Active manager | +438K +61.3% | 1.2M | $135M |
| Capital World Investors Active manager | +429K +59.2% | 1.2M | $135M |
| Nomura Asset Management International Inc. | +347K +85.5% | 752K | $88M |
| State Street Corp Index funds | +226K +11.6% | 2.2M | $254M |
| Panagora Asset Management Inc Active manager | +208K +161.4% | 337K | $39.5M |
| Geode Capital Management, LLC Index funds | +134K +10.6% | 1.4M | $163M |
| Perceptive Advisors LLC Hedge fund | +115K New position | 115K | $13.5M |
| Seven Fleet Capital Management LP | +110K New position | 110K | $12.9M |
| Pictet Asset Management Holding SA | +103K +24.3% | 526K | $61.6M |
| Capricorn Fund Managers Ltd | +101K New position | 101K | $11.9M |
| Massachusetts Financial Services Co Active manager | +98K +34.3% | 385K | $45M |
| Peregrine Capital Management LLC | +89K New position | 89K | $10.4M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +1.7M +86.7% | 3.7M | $430M |
| William Blair Investment Management, LLC Active manager | +1.1M +318.5% | 1.4M | $164M |
| Price T Rowe Associates Inc Active manager | +938K +54.6% | 2.7M | $311M |
| Polar Capital Holdings PLC Active manager | +562K +198.3% | 846K | $99M |
| Franklin Resources Inc Active manager | +438K +61.3% | 1.2M | $135M |
| Capital World Investors Active manager | +429K +59.2% | 1.2M | $135M |
| Panagora Asset Management Inc Active manager | +208K +161.4% | 337K | $39.5M |
| Perceptive Advisors LLC Hedge fund | +115K New position | 115K | $13.5M |
| Massachusetts Financial Services Co Active manager | +98K +34.3% | 385K | $45M |
| Aristeia Capital, L.L.C. Hedge fund | +64K New position | 64K | $7.5M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Citadel Advisors LLC Hedge fund | −1.1M Sold out | 0 | — |
| Paradigm Biocapital Advisors LP | −625K Sold out | 0 | — |
| Bvf Inc | −529K −33.4% | 1.1M | $124M |
| Point72 Asset Management, L.P. Hedge fund | −347K Sold out | 0 | — |
| Soleus Capital Management, L.P. Hedge fund | −325K −81.3% | 75K | $8.8M |
| BNP Paribas Financial Markets | −305K −33.5% | 606K | $71M |
| Millennium Management LLC Hedge fund | −272K −73.9% | 96K | $11.3M |
| Logos Global Management LP Hedge fund | −200K Sold out | 0 | — |
| Novo Holdings A/S | −200K −15.1% | 1.1M | $132M |
| First Turn Management, LLC | −182K −45.6% | 218K | $25.5M |
| Morgan Stanley | −173K −33.0% | 351K | $41.1M |
| Vanguard Capital Management LLC Index funds | −161K −6.7% | 2.3M | $264M |
| Eventide Asset Management, LLC | −160K −11.4% | 1.2M | $146M |
| Bank Of America Corp | −160K −22.2% | 562K | $65.8M |
| Nuveen, LLC | −145K −30.6% | 329K | $38.5M |
| Renaissance Technologies LLC Hedge fund | −140K −24.0% | 442K | $51.8M |
| D. E. Shaw & Co., Inc. Hedge fund | −140K −83.4% | 28K | $3.3M |
| UBS Group AG | −115K −23.3% | 380K | $44.5M |
| Goldman Sachs Group Inc | −112K −17.0% | 550K | $64.4M |
| Trails Edge Capital Partners, LP | −110K −33.0% | 223K | $26.1M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Citadel Advisors LLC Hedge fund | −1.1M Sold out | 0 | — |
| Point72 Asset Management, L.P. Hedge fund | −347K Sold out | 0 | — |
| Soleus Capital Management, L.P. Hedge fund | −325K −81.3% | 75K | $8.8M |
| Millennium Management LLC Hedge fund | −272K −73.9% | 96K | $11.3M |
| Logos Global Management LP Hedge fund | −200K Sold out | 0 | — |
| Renaissance Technologies LLC Hedge fund | −140K −24.0% | 442K | $51.8M |
| D. E. Shaw & Co., Inc. Hedge fund | −140K −83.4% | 28K | $3.3M |
| Voloridge Investment Management, LLC Hedge fund | −104K Sold out | 0 | — |
| Exoduspoint Capital Management, LP Hedge fund | −87K Sold out | 0 | — |
| Two Sigma Investments, LP Hedge fund | −85K −10.9% | 690K | $80.8M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Perceptive Advisors LLCHedge fund | 115K | $13.5M |
| Seven Fleet Capital Management LP | 110K | $12.9M |
| Capricorn Fund Managers Ltd | 101K | $11.9M |
| Peregrine Capital Management LLC | 89K | $10.4M |
| Aristeia Capital, L.L.C.Hedge fund | 64K | $7.5M |
| Trexquant Investment LPHedge fund | 53K | $6.2M |
| Man Group PLCHedge fund | 37K | $4.4M |
| Neo Ivy Capital Management | 36K | $4.2M |
| Algert Global LLCHedge fund | 34K | $3.9M |
| Pfm Health Sciences, LPHedge fund | 32K | $3.7M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Citadel Advisors LLCHedge fund | 1.1M | $97.2M |
| Paradigm Biocapital Advisors LP | 625K | $57.7M |
| Point72 Asset Management, L.P.Hedge fund | 347K | $32.1M |
| Logos Global Management LPHedge fund | 200K | $18.5M |
| Voloridge Investment Management, LLCHedge fund | 104K | $9.6M |
| Exoduspoint Capital Management, LPHedge fund | 87K | $8.1M |
| Arrowstreet Capital, Limited PartnershipHedge fund | 68K | $6.3M |
| Bank Of Montreal | 56K | $5.2M |
| Alps Advisors Inc | 49K | $4.5M |
| Cinctive Capital Management LPHedge fund | 39K | $3.6M |
Who holds the shares
- Institutions reporting
- 324
- Ten largest holders
- 47.5% of 13F-reported shares
- Index fund managers
- 19.5% of 13F-reported shares
- Active managers and hedge funds
- 30.2% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 29 | 34 | 11 | 13 | +2.6M | +13.9% |
| Index fund managers | 9 | 3 | 1 | 0 | +1.8M | +14.6% |
| Other institutions | 147 | 104 | 47 | 29 | −163K | −0.5% |
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