Mirum Pharmaceuticals, Inc. (MIRM)
Nasdaq: MIRM · Pharmaceutical Preparations · Foster City, CA · filing with the SEC since 2018
Who owns Mirum Pharmaceuticals, Inc.
As filed with the SECHolders of 5% or more
4
JANUS HENDERSON GROUP Ltd. holds 9.7% of Common Stock, as its SCHEDULE 13G/A filed Aug 13, 2026 says.
Directors and officers
14
report now, of 22 people on the record since 2019. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
JANUS HENDERSON GROUP Ltd.
SCHEDULE 13G/A · filed Aug 13, 2026 · Common Stock · 11.8% in Feb 17, 2026
Patrick J. Heron
SCHEDULE 13D/A · filed Jan 27, 2026 · Common Stock, par value $0.0001 per share · 7.6% in Nov 4, 2025
Fmr LLC
SCHEDULE 13G · filed Aug 6, 2026 · COMMON STOCK
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 27, 2026 · Common Stock
Eventide Asset Management, LLC
SCHEDULE 13G/A · filed Feb 13, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 5.43% in Feb 14, 2025
Bvf Partners L P/il
SCHEDULE 13G/A · filed Nov 14, 2025 · Common Stock, par value $0.0001 per share · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What MIRM reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Bile Acid Portfolio Acquisition
A company bought · acquisition · owns, named in the 10-K filed Feb 25, 2026
2 subsidiaries in 2 countries, from the list filed with the 10-K filed Mar 8, 2023.
Insider tradesForm 4
60sales
1purchases
39sales on a scheduled plan
7people selling
$44.0Msold, in dollars
$9.0Mbought, in dollars
Open-market trades on Form 4 from Nov 4, 2025 to Nov 4, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 4, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 42 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Peetz Christopher | CHIEF EXECUTIVE OFFICER | 20 | $18.1M | 16 | 0 | $0 |
| Grey Michael G | Executive Chairman | 3 | $11.1M | 3 | 0 | $0 |
| Howe Jolanda | SVP, GLOBAL CONTROLLER | 9 | $5.6M | 4 | 0 | $0 |
| Bjerkholt Eric | CHIEF FINANCIAL OFFICER | 12 | $3.6M | 8 | 0 | $0 |
| Radovich Peter | PRESIDENT AND COO | 4 | $2.3M | 0 | 0 | $0 |
| Ramasastry Saira | director | 9 | $1.9M | 8 | 0 | $0 |
| Quan Joanne | CHIEF MEDICAL OFFICER | 3 | $1.5M | 0 | 0 | $0 |
| Heron Patrick J | director | 0 | $0 | 0 | 1 | $9.0M |