MIRM insider buying – Mirum Pharmaceuticals, Inc.
28 insider purchases since 2016 worth $39.5M by 12 different insiders. Last 12 months: 1 purchases, $9.0M. Most recent filing: 2026-01-27.
Large company Public float $2.3B (latest 10-K, SEC).
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 14 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| Heron Patrick J Director | $20.3M 10× · 749,752 sh | 2019-07-22 2026-01-23 | – | 4,031,625 shares as of 2026-01-27 | Holds - never sold |
| Novo Holdings A/S 10% Owner | $8.6M 1× · 575,000 sh | 2019-07-22 2019-07-22 | – | 2,445,147 shares as of 2019-07-23 | Holds - never sold |
| Flynn James E 10% Owner | $5.0M 1× · 332,000 sh | 2019-07-22 2019-07-22 | – | 3,282,912 shares as of 2019-07-24 | Holds - never sold |
| O'Donnell Niall Director | $4.5M 1× · 300,000 sh | 2019-07-22 2019-07-22 | 1× · $6.0M last 2022-11-11 | 1,714,888 shares as of 2022-11-15 | Sold part |
| BJERKHOLT ERIC CFO | $397,700 3× · 14,000 sh | 2023-09-11 2024-03-27 | 8× · $4.3M last 2026-09-14 | 44,745 shares as of 2026-09-15 | Sold part |
| Peetz Christopher CEO | $294,234 3× · 21,070 sh | 2019-09-06 2021-11-24 | 20× · $25.8M last 2026-09-01 | 381,940 shares as of 2026-09-03 | Sold part |
| Clements Ian CFO | $112,519 3× · 7,920 sh | 2019-09-06 2021-11-24 | – | 30,011 shares as of 2022-11-14 | Holds - never sold |
| Brege Laura Director | $112,200 1× · 10,000 sh | 2019-09-10 2019-09-10 | 1× · $1.3M last 2025-09-11 | 32,703 shares as of 2025-09-12 | Sold part |
| Fischer Laurent Director | $69,013 2× · 6,750 sh | 2019-09-06 2019-09-16 | – | 10,727 shares as of 2026-06-02 | Holds - never sold |
| Tucker Edwin Jonathan Officer | $49,570 1× · 4,500 sh | 2020-03-19 2020-03-19 | – | 45,838 shares as of 2021-11-15 | Holds - never sold |
| Vig Pamela Officer | $17,679 1× · 1,612 sh | 2019-09-06 2019-09-06 | 1× · $1.0M last 2024-06-24 | 132,965 shares as of 2024-06-25 | Sold part |
| Longpre Lara Officer | $10,268 1× · 965 sh | 2019-09-10 2019-09-10 | – | 105,372 shares as of 2024-03-18 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 1 | $9.0M | 1 | 36 | $29.9M |
| 2025 | 4 | $280,106 | 1 | 27 | $28.1M |
| 2024 | 3 | $111,468 | 2 | 7 | $1.8M |
| 2023 | 5 | $4.6M | 2 | 6 | $1.6M |
| 2022 | 0 | – | – | 2 | $6.9M |
| 2021 | 2 | $121,305 | 2 | 3 | $2.7M |
| 2020 | 3 | $189,025 | 3 | – | – |
| 2019 | 10 | $25.2M | 9 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2026-01-27 | Heron Patrick J | Director | 131,425 | $68.48 | $9.0M | +40.1% | SEC |
| 2025-03-18 | Heron Patrick J | Director | 549 | $44.10 | $24,213 | +0.3% | SEC |
| 2025-03-12 | Heron Patrick J | Director | 2,298 | $43.30 | $99,511 | +1.4% | SEC |
| 2025-03-10 | Heron Patrick J | Director | 1,915 | $43.68 | $83,655 | +1.2% | SEC |
| 2025-03-06 | Heron Patrick J | Director | 1,602 | $45.40 | $72,727 | +1.0% | SEC |
| 2024-03-27 | BJERKHOLT ERIC | CFO | 2,000 | $24.80 | $49,600 | +16.7% | SEC |
| 2024-03-18 | BJERKHOLT ERIC | CFO | 2,000 | $25.80 | $51,600 | +20.0% | SEC |
| 2024-03-18 | Longpre Lara | Officer | 965 | $10.64 | $10,268 | +0.9% | SEC |
| 2023-11-14 | Heron Patrick J | Director | 2,910 | $28.30 | $82,353 | +1.8% | SEC |
| 2023-09-15 | Heron Patrick J | Director | 2,625 | $31.02 | $81,428 | +1.7% | SEC |
| 2023-09-13 | Heron Patrick J | Director | 8,437 | $30.43 | $256,766 | +5.7% | SEC |
| 2023-09-12 | BJERKHOLT ERIC | CFO | 10,000 | $29.65 | $296,500 | SEC | |
| 2023-09-05 | Heron Patrick J | Director | 147,991 | $26.25 | $3.9M | SEC | |
| 2021-11-29 | Peetz Christopher | CEO | 7,000 | $14.40 | $100,800 | +33.3% | SEC |
| 2021-11-29 | Clements Ian | CFO | 1,450 | $14.14 | $20,505 | +8.5% | SEC |
| 2020-12-28 | Peetz Christopher | CEO | 5,000 | $18.70 | $93,480 | +2.5% | SEC |
| 2020-12-28 | Clements Ian | CFO | 2,470 | $18.61 | $45,975 | +46.0% | SEC |
| 2020-03-23 | Tucker Edwin Jonathan | Officer | 4,500 | $11.02 | $49,570 | +300.0% | SEC |
| 2019-09-18 | Fischer Laurent | Director | 2,100 | $9.39 | $19,722 | +45.2% | SEC |
| 2019-09-12 | Brege Laura | Director | 10,000 | $11.22 | $112,200 | SEC | |
| 2019-09-10 | Vig Pamela | Officer | 1,612 | $10.97 | $17,679 | SEC | |
| 2019-09-10 | Peetz Christopher | CEO | 9,070 | $11.02 | $99,954 | +4.8% | SEC |
| 2019-09-10 | Fischer Laurent | Director | 4,650 | $10.60 | $49,291 | SEC | |
| 2019-09-10 | Clements Ian | Officer | 4,000 | $11.51 | $46,039 | SEC | |
| 2019-07-24 | O'Donnell Niall | Director | 300,000 | $15.00 | $4.5M | +18.5% | SEC |
| 2019-07-24 | Heron Patrick J | Director | 450,000 | $15.00 | $6.8M | +14.4% | SEC |
| 2019-07-24 | Flynn James E | 10% Owner | 332,000 | $15.00 | $5.0M | +23.8% | SEC |
| 2019-07-23 | Novo Holdings A/S | 10% Owner | 575,000 | $15.00 | $8.6M | +30.7% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | BJERKHOLT ERIC | CFO | 9,943 | $98.37 | $978,093 | Sale | SEC |
| 2026-09-03 | Howe Jolanda | Officer | 658 | $100.00 | $65,800 | Pre-planned (10b5-1) | SEC |
| 2026-09-03 | Peetz Christopher | CEO | 30,000 | $98.68 | $3.0M | Pre-planned (10b5-1) | SEC |
| 2026-08-19 | Howe Jolanda | Officer | 40,000 | $100.00 | $4.0M | Sale | SEC |
| 2026-08-12 | BJERKHOLT ERIC | CFO | 6,001 | $99.90 | $599,500 | Pre-planned (10b5-1) | SEC |
| 2026-08-11 | Peetz Christopher | CEO | 20,000 | $98.92 | $2.0M | Pre-planned (10b5-1) | SEC |
| 2026-08-05 | Howe Jolanda | Officer | 1,840 | $105.29 | $193,734 | Pre-planned (10b5-1) | SEC |
| 2026-07-08 | Peetz Christopher | CEO | 20,000 | $122.27 | $2.4M | Pre-planned (10b5-1) | SEC |
| 2026-07-08 | BJERKHOLT ERIC | CFO | 5,000 | $122.25 | $611,273 | Pre-planned (10b5-1) | SEC |
| 2026-07-02 | Howe Jolanda | Officer | 2,721 | $120.00 | $326,520 | Pre-planned (10b5-1) | SEC |
| 2026-06-18 | Howe Jolanda | Officer | 2,594 | $101.95 | $264,458 | Pre-planned (10b5-1) | SEC |
| 2026-06-09 | BJERKHOLT ERIC | CFO | 5,000 | $93.82 | $469,077 | Pre-planned (10b5-1) | SEC |
| 2026-06-02 | Ramasastry Saira | Director | 3,977 | $100.00 | $397,700 | Sale | SEC |
| 2026-06-02 | Peetz Christopher | CEO | 30,000 | $95.84 | $2.9M | Pre-planned (10b5-1) | SEC |
| 2026-05-18 | Ramasastry Saira | Director | 2,000 | $109.47 | $218,940 | Pre-planned (10b5-1) | SEC |
Showing the latest 15 of 81 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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