Security record · archived quarter
MIRM
Mirum Pharmaceuticals, Inc. · Healthcare · Biotechnology
102Tracked holders
+1Δ holders
36.05MShares held
$2.83BReported value
+2New positions
−0Exits
Momentum inputs (comparable managers):
holder breadth +1.0% ·
share flow +1.1% ·
net new positions +2.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
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 · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Janus Henderson Group Plc | 6.07M | — | $479.05M | 0.2% | n/c | 1 | SEC ↗ |
| 2 | Janus Henderson Group Plc | 6.07M | — | $479.05M | 0.2% | n/c | 1 | SEC ↗ |
| 3 | Janus Henderson Group Plc | 6.07M | — | $479.05M | 0.2% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 3.65M | +1.2% | $287.94M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 21 | The Vanguard Group ✦ (passive) | 2.60M | +2.0% | $205.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | The Vanguard Group ✦ (passive) | 2.60M | +2.0% | $205.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | The Vanguard Group ✦ (passive) | 2.60M | +2.0% | $205.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 24 | The Vanguard Group ✦ (passive) | 2.60M | +2.0% | $205.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 25 | The Vanguard Group ✦ (passive) | 2.60M | +2.0% | $205.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 26 | State Street Global Advisors ✦ (passive) | 2.14M | +59.2% | $169.35M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 27 | T. Rowe Price ✦ | 1.42M | +10.7% | $112.20M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 28 | T. Rowe Price ✦ | 1.42M | +10.7% | $112.20M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 29 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 30 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 31 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 32 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 33 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 34 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 35 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 36 | Wellington Management ✦ | 1.24M | +56.5% | $97.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 37 | Geode Capital Management ✦ (passive) | 1.06M | +5.2% | $83.98M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 38 | Geode Capital Management ✦ (passive) | 1.06M | +5.2% | $83.98M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 39 | D. E. Shaw & Co. ✦ | 948.16K | +2.7% | $74.90M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 40 | D. E. Shaw & Co. ✦ | 948.16K | +2.7% | $74.90M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 41 | Clearbridge Investments, LLC | 865.97K | — | $68.40M | 0.1% | n/c | 1 | SEC ↗ |
| 42 | Citadel Advisors ✦ | 840.22K | -19.2% | $66.37M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 43 | Citadel Advisors ✦ | 840.22K | -19.2% | $66.37M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 44 | Citadel Advisors ✦ | 840.22K | -19.2% | $66.37M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 45 | Goldman Sachs Group ✦ | 724.32K | +60.7% | $57.21M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Goldman Sachs Group ✦ | 724.32K | +60.7% | $57.21M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Goldman Sachs Group ✦ | 724.32K | +60.7% | $57.21M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 50 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 54 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Bank Of America Corp /De/ | 713.45K | — | $56.36M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Bnp Paribas Financial Markets | 655.78K | — | $51.80M | 0.0% | n/c | 1 | SEC ↗ |
| 57 | Bnp Paribas Financial Markets | 655.78K | — | $51.80M | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Franklin Resources Inc | 650.72K | — | $51.40M | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Franklin Resources Inc | 650.72K | — | $51.40M | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Franklin Resources Inc | 650.72K | — | $51.40M | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Franklin Resources Inc | 650.72K | — | $51.40M | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Fidelity (FMR) ✦ | 646.47K | +1.0% | $51.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 63 | Fidelity (FMR) ✦ | 646.47K | +1.0% | $51.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Fidelity (FMR) ✦ | 646.47K | +1.0% | $51.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 65 | Fidelity (FMR) ✦ | 646.47K | +1.0% | $51.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 66 | Pictet Asset Management Holding SA | 577.27K | — | $45.60M | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 69 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 71 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 72 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 73 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 74 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Bank of New York Mellon Corp | 565.58K | — | $44.68M | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Connor, Clark & Lunn Investment… | 521.65K | — | $41.21M | 0.1% | n/c | 1 | SEC ↗ |
| 79 | Loomis Sayles & Co L P | 514.98K | — | $40.68M | 0.0% | n/c | 1 | SEC ↗ |
| 80 | Loomis Sayles & Co L P | 514.98K | — | $40.68M | 0.0% | n/c | 1 | SEC ↗ |
| 81 | Nuveen, LLC | 503.05K | — | $39.74M | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Nuveen, LLC | 503.05K | — | $39.74M | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Nuveen, LLC | 503.05K | — | $39.74M | 0.0% | n/c | 1 | SEC ↗ |
| 84 | Federated Hermes, Inc. | 481.96K | — | $38.07M | 0.1% | n/c | 1 | SEC ↗ |
| 85 | Federated Hermes, Inc. | 481.96K | — | $38.07M | 0.1% | n/c | 1 | SEC ↗ |
| 86 | Adage Capital Partners ✦ | 467.47K | -6.0% | $36.93M | 0.1% | ▼ Trim | 7 | SEC ↗ |
| 87 | Renaissance Technologies ✦ | 439.08K | -14.5% | $34.68M | 0.1% | ▼ Trim | 6 | SEC ↗ |
| 88 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 89 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 91 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 92 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 93 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 94 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Morgan Stanley ✦ | 425.69K | -36.5% | $33.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 96 | Nomura Asset Management… | 421.85K | — | $33.32M | 0.1% | n/c | 1 | SEC ↗ |
| 97 | Charles Schwab Investment… | 409.29K | — | $32.33M | 0.0% | n/c | 1 | SEC ↗ |
| 98 | Two Sigma Investments ✦ | 388.54K | +13.2% | $30.69M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 99 | Northern Trust Corp | 374.86K | — | $29.61M | 0.0% | n/c | 1 | SEC ↗ |
| 100 | Northern Trust Corp | 374.86K | — | $29.61M | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
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: Q4 2025 ·
Methodology ·
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