Security record · archived quarter
MIRM
Mirum Pharmaceuticals, Inc. · Healthcare · Biotechnology
107Tracked holders
+6Δ holders
39.52MShares held
$3.63BReported value
+12New positions
−7Exits
Momentum inputs (comparable managers):
holder breadth +5.9% ·
share flow +11.0% ·
net new positions +4.7%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 106 | +2 | 35.68M | $4.18B | +9 | −7 |
| Q1 2026 | 107 | +6 | 39.52M | $3.63B | +12 | −7 |
| Q4 2025 | 102 | +1 | 36.05M | $2.83B | +2 | — |
| Q3 2025 | 20 | 0 | 17.64M | $1.29B | — | — |
| Q2 2025 | 17 | +1 | 13.61M | $692.65M | +2 | −1 |
| Q1 2025 | 13 | +1 | 7.45M | $335.67M | +2 | −1 |
| Q4 2024 | 12 | 0 | 6.63M | $274.04M | +1 | −1 |
| Q3 2024 | 11 | +2 | 4.84M | $188.84M | +2 | — |
| Q2 2024 | 9 | — | 4.39M | $149.94M | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Janus Henderson Group Plc | 6.95M | +14.5% | $641.76M | 0.3% | ▲ Add | 2 | SEC ↗ |
| 2 | Janus Henderson Group Plc | 6.95M | +14.5% | $641.76M | 0.3% | ▲ Add | 2 | SEC ↗ |
| 3 | Janus Henderson Group Plc | 6.95M | +14.5% | $641.76M | 0.3% | ▲ Add | 2 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 3.85M | +5.5% | $355.34M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | Vanguard Capital Management Llc | 2.41M | — | $223.08M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 25 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 26 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 27 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 28 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 29 | Fidelity (FMR) ✦ | 1.97M | +204.0% | $181.56M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 30 | State Street Global Advisors ✦ (passive) | 1.94M | -9.3% | $179.61M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 31 | T. Rowe Price ✦ | 1.72M | +20.9% | $158.66M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 32 | T. Rowe Price ✦ | 1.72M | +20.9% | $158.66M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 33 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 34 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 35 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 36 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 37 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 38 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 39 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 40 | Wellington Management ✦ | 1.33M | +7.8% | $123.31M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 41 | Geode Capital Management ✦ (passive) | 1.26M | +18.5% | $116.42M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 42 | Geode Capital Management ✦ (passive) | 1.26M | +18.5% | $116.42M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 43 | Citadel Advisors ✦ | 1.05M | +25.2% | $97.19M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 44 | Citadel Advisors ✦ | 1.05M | +25.2% | $97.19M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 45 | Bnp Paribas Financial Markets | 911.42K | +39.0% | $84.20M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 46 | Bnp Paribas Financial Markets | 911.42K | +39.0% | $84.20M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 47 | Two Sigma Investments ✦ | 774.84K | +99.4% | $71.58M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 48 | Capital World Investors ✦ | 724.41K | New | $66.92M | 0.0% | New | 1 | SEC ↗ |
| 49 | Bank Of America Corp /De/ | 722.18K | +1.2% | $66.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | Bank Of America Corp /De/ | 722.18K | +1.2% | $66.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Bank Of America Corp /De/ | 722.18K | +1.2% | $66.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Bank Of America Corp /De/ | 722.18K | +1.2% | $66.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Franklin Resources Inc | 714.80K | +9.8% | $66.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Franklin Resources Inc | 714.80K | +9.8% | $66.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 55 | Franklin Resources Inc | 714.80K | +9.8% | $66.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | Franklin Resources Inc | 714.80K | +9.8% | $66.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | Franklin Resources Inc | 714.80K | +9.8% | $66.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | Clearbridge Investments, LLC | 671.87K | -22.4% | $62.07M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 59 | Goldman Sachs Group ✦ | 662.31K | -8.6% | $61.18M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | Goldman Sachs Group ✦ | 662.31K | -8.6% | $61.18M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 62 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 67 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Bank of New York Mellon Corp | 584.52K | +3.4% | $54.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 73 | Renaissance Technologies ✦ | 582.09K | +32.6% | $53.77M | 0.1% | ▲ Add | 7 | SEC ↗ |
| 74 | Balyasny Asset Management L.P. | 539.03K | +88.6% | $49.80M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 75 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 76 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 77 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 81 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | Morgan Stanley ✦ | 524.57K | +23.2% | $48.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 83 | Federated Hermes, Inc. | 506.21K | +5.0% | $46.76M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 84 | Federated Hermes, Inc. | 506.21K | +5.0% | $46.76M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 85 | UBS Group AG | 494.99K | +54.3% | $45.73M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 86 | UBS Group AG | 494.99K | +54.3% | $45.73M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | UBS Group AG | 494.99K | +54.3% | $45.73M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | UBS Group AG | 494.99K | +54.3% | $45.73M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Connor, Clark & Lunn Investment… | 479.48K | -8.1% | $44.29M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 90 | Loomis Sayles & Co L P | 475.32K | -7.7% | $43.91M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 91 | Loomis Sayles & Co L P | 475.32K | -7.7% | $43.91M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 92 | Nuveen, LLC | 474.23K | -5.7% | $43.81M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 93 | Nuveen, LLC | 474.23K | -5.7% | $43.81M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 94 | Nuveen, LLC | 474.23K | -5.7% | $43.81M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Charles Schwab Investment… | 427.09K | +4.3% | $39.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 96 | Pictet Asset Management Holding SA | 423.51K | -26.6% | $39.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | Nomura Asset Management… | 405.32K | -3.9% | $37.44M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 98 | Northern Trust Corp | 394.92K | +5.3% | $36.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 99 | Northern Trust Corp | 394.92K | +5.3% | $36.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 100 | Northern Trust Corp | 394.92K | +5.3% | $36.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Capital World Investors | $66.92M | 0.0% |
Exited
| Norges Bank | $20.79M | was 0.0% |
| Qube Research & Technologies… | $8.61M | was 0.0% |
| Man Group plc | $540,371 | was 0.0% |
| Tudor Investment Corp Et Al | $411,143 | was 0.0% |
| Group One Trading Llc | $68,879 | was 0.0% |
| Daiwa Securities Group Inc. | $12,000 | was 0.0% |
| National Bank Of Canada /Fi/ | $1,342 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 308 holders, 67.83M shares, $6.01B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 18
Howe Jolanda
Officer · 40.00K sh · $4.00M
Aug 11
BJERKHOLT ERIC
Officer · 6.00K sh · $599,510
Aug 10
Peetz Christopher
Officer, Director · 11.68K sh · $1.15M
Aug 10
Peetz Christopher
Officer, Director · 6.02K sh · $597,187
Aug 10
Peetz Christopher
Officer, Director · 2.30K sh · $230,322
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 13
SC 13G/A — Janus Henderson Group Ltd.
Aug 06
SC 13G — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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