SEC Form 4 · accession 0001614740-26-000013
Mirum Pharmaceuticals, Inc. · MIRM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Christopher Peetz
Officer — CHIEF EXECUTIVE OFFICER · Director
Period of report
Sep 1, 2026
Accepted (ET)
Sep 3, 2026 · 6:52 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001759425
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Sep 1, 2026 | M | 30,000 | $2.936 | A | 224,440 | D | |
| Common StockF3 | Sep 1, 2026 | S | 8,312 | $98.08 | D | 216,128 | D | |
| Common StockF4 | Sep 1, 2026 | S | 21,688 | $98.91 | D | 194,440 | D | |
| Common Stock | holding | — | — | — | 187,500 | I | By The Peetz Family Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy)F5 | $2.936 | Sep 1, 2026 | M | 30,000 | D | — | Mar 11, 2029 | Common Stock | 30,000 | 58,487 | D |
Explanation of responses
- F1Includes 131 shares of Common Stock that were acquired by the Reporting Person on May 10, 2026, pursuant to the Issuer's Employee Stock Purchase Plan.
- F2Reported transaction occurred pursuant to a Rule 10b5-1 Plan adopted by the reporting person on March 2, 2026.
- F3The weighted average sale price for the transaction reported was $98.08, and the range of prices were between $97.47 and $98.42. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.
- F4The weighted average sale price for the transaction reported was $98.91, and the range of prices were between $98.49 and $99.38. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided.
- F5The stock option is fully vested.