About this page
Insider trades reported on SEC Form 4: when the people who run a company buy or sell its shares with their own money.
How to read it
- Form 4
- The form a company insider (officer, director or owner of more than 10%) must file with the SEC within two business days of buying or selling the company's shares.
- Buy (P) and Sell (S)
- Open-market purchases and sales. Gifts, option exercises and automatic tax withholding are left out because they say little about what the insider thinks.
- Value
- Shares times price, as reported on the filing.
- 10b5-1
- A trade made under a plan set up in advance. Planned sales are common and usually say less than an unplanned purchase.
- Late filing
- A Form 4 filed more than two business days after the trade.
- Vs. S&P 500
- How the stock did after the trade minus how the overall market did in the same weeks.
A real example
In January 2016, when bank stocks were falling, JPMorgan Chase CEO Jamie Dimon bought 500,000 JPMorgan shares with his own money, worth about $26 million. His Form 4 made the purchase public within days, and investors read it as a strong sign of confidence.
Explain it like I'm 13
If the coach of a team bets his own allowance that his team will win, that tells you something. A Form 4 is the note a company boss must hand in whenever he buys or sells his own company's shares, so everyone can see it.
Data from public SEC filings and congressional reports. Information, not investment advice. Check every number against the filing linked on the page.
Mirum Pharmaceuticals, Inc. (MIRM): Insider Trades and Fund Holdings
In the past 12 months, Mirum Pharmaceuticals, Inc. insiders reported no open-market purchases and 11 sales worth $14.4M; 9 of the sales were reported as made under a 10b5-1 trading plan.
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144), Congress trades and fund moves in the past year, newest first.
- Sep 15, 2026Planned saleERIC BJERKHOLT (officer) filed notice to sell about $978,093 around Sep 14, 2026
- Sep 14, 2026Insider saleCFO Eric Bjerkholt sold $978,093 (6 days after: executive or director change)
- Sep 8, 2026NewsCompany reported: Executive or director change
- Sep 2, 2026Insider saleSVP Jolanda Howe sold $65,800 under a 10b5-1 plan
- Sep 2, 2026Planned saleJOLANDA MARIE HOWE (officer) filed notice to sell about $65,800 around Sep 2, 2026
- Sep 1, 2026Insider saleCEO Christopher Peetz sold $3 million under a 10b5-1 plan
- Sep 1, 2026Planned saleCHRISTOPHER PEETZ (officer, director) filed notice to sell about $3 million around Sep 1, 2026
- Aug 18, 2026Insider saleSVP Jolanda Howe sold $4 million
- Aug 18, 2026Planned saleJOLANDA MARIE HOWE (officer) filed notice to sell about $4 million around Aug 18, 2026
- Aug 11, 2026Insider saleCFO Eric Bjerkholt sold $599,510 under a 10b5-1 plan (6 days after: quarterly or annual results)
- Aug 11, 2026Planned saleERIC BJERKHOLT (officer) filed notice to sell about $599,510 around Aug 11, 2026
- Aug 10, 2026Insider saleCEO Christopher Peetz sold $2 million under a 10b5-1 plan (5 days after: quarterly or annual results)
- Aug 10, 2026Planned saleCHRISTOPHER PEETZ (officer, director) filed notice to sell about $2 million around Aug 10, 2026
- Aug 5, 2026NewsCompany reported: Quarterly or annual results
- Aug 3, 2026Insider saleSVP Jolanda Howe sold $193,734 under a 10b5-1 plan
- Aug 3, 2026Planned saleJOLANDA MARIE HOWE (officer) filed notice to sell about $193,734 around Aug 3, 2026
- Jul 6, 2026Insider saleCEO Christopher Peetz sold $2.4 million under a 10b5-1 plan
- Jul 6, 2026Insider saleCFO Eric Bjerkholt sold $611,274 under a 10b5-1 plan
- Jul 1, 2026Insider saleSVP Jolanda Howe sold $326,520 under a 10b5-1 plan
- Jun 30, 2026FundRenaissance Technologies cut 24% in Q2 2026 (13F filed Aug 13, 2026)
- Jun 17, 2026Insider saleSVP Jolanda Howe sold $264,458 under a 10b5-1 plan
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 15, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 15 | Eric BjerkholtCFO | ▼ SELL | $978K |
| Sep 3 | Christopher PeetzCEO | ▼ SELL10b5-1 | $2.96M |
| Sep 3 | Jolanda HoweSVP | ▼ SELL10b5-1 | $66K |
| Aug 19 | Jolanda HoweSVP | ▼ SELL | $4.00M |
| Aug 12 | Eric BjerkholtCFO | ▼ SELL10b5-1 | $600K |
| Aug 11 | Christopher PeetzCEO | ▼ SELL10b5-1 | $1.98M |
| Aug 5 | Jolanda HoweSVP | ▼ SELL10b5-1 | $194K |
| Jul 8 | Christopher PeetzCEO | ▼ SELL10b5-1 | $2.45M |
| Jul 8 | Eric BjerkholtCFO | ▼ SELL10b5-1 | $611K |
| Jul 2 | Jolanda HoweSVP | ▼ SELL10b5-1 | $327K |
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Eric Bjerkholt | CFO | 0 | $0 | 3 | $2.19M |
| Christopher Peetz | CEO | 0 | $0 | 3 | $7.38M |
| Jolanda Howe | SVP | 0 | $0 | 5 | $4.85M |
Buybacks and executive pay
| Year | CEO pay reported | CEO pay "actually paid" | Value of $100 invested |
|---|---|---|---|
| 2025 | $10.4M | $29.7M | n/a |
| 2024 | $6.60M | $13.0M | n/a |
| 2023 | $6.45M | $9.43M | n/a |
From the company's XBRL data filed with the SEC. "Actually paid" is the SEC's pay-versus-performance measure, which counts changes in the value of stock awards. "Value of $100 invested" is the company's cumulative shareholder return as reported, usually measured from five years earlier. See all buybacks and CEO pay across companies.
A All 11 insider trades reported on time. How it is graded
Tracked funds that report MIRM
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 442,185 | $51.8M | ▼ −24.0% |
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →