Mirum Pharmaceuticals, Inc. (MIRM) Insider Trading
Over the last 3 months, MIRM insiders made 0 open-market buys and 19 sales, a net sale of -$10.9M (SEC Form 4). Over the last 6 months, 245 institutions increased and 191 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
19
Net (3m)
-$10.9M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Aug
Context3-month price +1%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 19, 2026 | Howe Jolandaofficer: SVP, GLOBAL CONTROLLER | Option | 40,000 | $6.27 |
| Aug 19, 2026 | Howe Jolandaofficer: SVP, GLOBAL CONTROLLER | Sell | 40,000 | $100.00 |
| Aug 12, 2026 | BJERKHOLT ERICofficer: CHIEF FINANCIAL OFFICER | Sell | 6,001 | $99.90 |
| Aug 11, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 2,300 | $100.14 |
| Aug 11, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 11,683 | $98.51 |
| Aug 11, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 6,017 | $99.25 |
| Aug 11, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Option | 20,000 | $2.94 |
| Aug 5, 2026 | Howe Jolandaofficer: SVP, GLOBAL CONTROLLER | Sell | 1,840 | $105.29 |
| Jul 8, 2026 | BJERKHOLT ERICofficer: CHIEF FINANCIAL OFFICER | Sell | 528 | $123.84 |
| Jul 8, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 1,975 | $123.74 |
| Jul 8, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 12,134 | $121.65 |
| Jul 8, 2026 | BJERKHOLT ERICofficer: CHIEF FINANCIAL OFFICER | Sell | 1,048 | $122.43 |
| Jul 8, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Option | 20,000 | $2.94 |
| Jul 8, 2026 | BJERKHOLT ERICofficer: CHIEF FINANCIAL OFFICER | Sell | 300 | $124.94 |
| Jul 8, 2026 | BJERKHOLT ERICofficer: CHIEF FINANCIAL OFFICER | Sell | 3,124 | $121.67 |
| Jul 8, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 4,181 | $122.34 |
| Jul 8, 2026 | Peetz Christopherdirector, officer: CHIEF EXECUTIVE OFFICER | Sell | 1,710 | $124.79 |
| Jul 2, 2026 | Howe Jolandaofficer: SVP, GLOBAL CONTROLLER | Sell | 2,721 | $120.00 |
| Jun 18, 2026 | Howe Jolandaofficer: SVP, GLOBAL CONTROLLER | Sell | 2,594 | $101.95 |
| Jun 17, 2026 | Walbert Timothy Pdirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | Fairey Williamdirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | Brege Lauradirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | GREY MICHAEL Gdirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | Ramasastry Sairadirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | Ramasastry Sairadirector | Grant | 1,980 | — |
| Jun 17, 2026 | Fairey Williamdirector | Grant | 1,980 | — |
| Jun 17, 2026 | Walbert Timothy Pdirector | Grant | 1,980 | — |
| Jun 17, 2026 | GREY MICHAEL Gdirector | Grant | 1,980 | — |
| Jun 17, 2026 | Heron Patrick Jdirector | Grant | 3,772 | $101.00 |
| Jun 17, 2026 | Cardon Londirector | Grant | 1,980 | — |
Source: MIRM SEC Form 4 filings, latest Aug 19, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MIRM positions over the last 6 months (SEC Form 13F).
Increased
245
New positions
132
Reduced
191
Sold out
43
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | Increased | 7.7M | May 15, 2026 |
| Frazier Life Sciences Management, L.P. | Unchanged | 7.7M | Aug 14, 2026 |
| JANUS HENDERSON GROUP PLC | Increased | 6.9M | May 18, 2026 |
| Jupiter Topco LLC | New Position | 5.9M | Aug 14, 2026 |
| BlackRock, Inc. | Increased | 4.4M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 3.8M | May 13, 2026 |
| FMR LLC | Increased | 3.7M | Aug 13, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 2.7M | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.4M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.4M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 2.3M | Aug 13, 2026 |
| STATE STREET CORP | Increased | 2.2M | Aug 7, 2026 |
| FMR LLC | Increased | 2.0M | May 15, 2026 |
| STATE STREET CORP | Reduced | 1.9M | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.7M | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.