Mirum Pharmaceuticals MIRM Insider Ownership

NASDAQ MIRM
$101.07 +0.44 (+0.44%)
As of: Sep 4, 2026 · 11:43 AM EDT

Insider Holdings by Owner

25.86Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
9.53%
■0% pp QoQ
Shares Held by Insiders
5.43Mn
filed for Sep 2026
■0.00% QoQ
Shares Outstanding
56.99Mn
56,993,841 shares
Direct Holdings
0
Indirect: 5.43Mn
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
27
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

MIRM's three largest insider shareholders as of August 29, 2026 are James E Flynn (TenPercentOwner, 3.24Mn shares), James E Flynn (TenPercentOwner, 3.24Mn shares), James E Flynn (TenPercentOwner, 3.24Mn shares).

Form 4 Holdings

Insiders Holding MIRM

Insiders 27
Shares held 25.86Mn
Of outstanding 45.37%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 James E Flynn TenPercentOwner, Other 0 3,244,434 3,244,434 12.5% 08 Jun, 2022
2 Scott D Sandell TenPercentOwner 0 2,199,372 2,199,372 8.5% 15 Jun, 2023
3 Anthony A. Jr. Florence TenPercentOwner 384 2,197,591 2,197,975 8.5% 15 Jun, 2023
4 Mohamad Makhzoumi TenPercentOwner 0 2,197,744 2,197,744 8.5% 15 Jun, 2023
5 Forest Baskett TenPercentOwner 0 2,187,791 2,187,791 8.5% 15 Jun, 2023
6 Ali Behbahani TenPercentOwner 0 2,186,378 2,186,378 8.5% 15 Jun, 2023
7 Carmen Chang TenPercentOwner 135 2,186,243 2,186,378 8.5% 15 Jun, 2023
8 Paul Edward Walker TenPercentOwner 0 2,186,357 2,186,357 8.5% 15 Jun, 2023
9 Partners 16, L.P. Nea TenPercentOwner 0 2,186,243 2,186,243 8.5% 15 Jun, 2023
10 Enterprise Associates 16, L.P. New TenPercentOwner 2,186,243 0 2,186,243 8.5% 15 Jun, 2023
11 Niall O'Donnell Director 0 1,621,118 1,621,118 6.3% 15 Nov, 2022
12 Patrick J Heron Director 0 459,010 459,010 1.8% 27 Jan, 2026
13 Christopher Peetz Chief Executive Officer 263,836 0 263,836 1.0% 11 Aug, 2026
14 Michael G Grey Executive Chairman 0 186,410 186,410 0.7% 01 Oct, 2024
15 Lara Longpre Chief Development Officer 104,407 0 104,407 0.4% 05 Feb, 2024
16 Peter Radovich President And Coo 57,260 0 57,260 0.2% 08 Jun, 2026
17 Edwin Jonathan Tucker Chief Medical Officer 45,838 0 45,838 0.2% 15 Nov, 2021
18 Eric Bjerkholt Chief Financial Officer 36,355 0 36,355 0.1% 12 Aug, 2026
19 Ian Clements Chief Financial Officer 30,011 0 30,011 0.1% 14 Nov, 2022
20 Pamela Vig Chief Scientific Officer 27,406 0 27,406 0.1% 25 Jun, 2024
21 Joanne Quan Chief Medical Officer 18,864 0 18,864 0.1% 17 Mar, 2026
22 Laura Brege Director 15,703 0 15,703 0.1% 12 Sep, 2025
23 Laurent Fischer Director 10,727 0 10,727 0.0% 02 Jun, 2026
24 Lon Cardon Director 9,680 0 9,680 0.0% 02 Jun, 2026
25 Timothy P Walbert Director 9,680 0 9,680 0.0% 02 Jun, 2026
26 William Fairey Director 2,500 0 2,500 0.0% 12 Jun, 2025
27 Jolanda Howe Svp, Global Controller 1,274 0 1,274 0.0% 19 Aug, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

1,147 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
18 Aug, 2026 Jolanda Howe Svp, Global Controller Acquired M 40,000 $6.27 $250.80K 41,274 Direct
18 Aug, 2026 Jolanda Howe Svp, Global Controller Disposed S 40,000 $100.00 $4.00Mn 1,274 Direct
18 Aug, 2026 Jolanda Howe Svp, Global Controller Disposed M 40,000 $0.00 $0 0 Direct
11 Aug, 2026 Eric Bjerkholt Chief Financial Officer Disposed S 6,001 $99.90 $599.51K 36,355 Direct
10 Aug, 2026 Christopher Peetz Chief Executive Officer Acquired M 20,000 $2.94 $58.72K 214,309 Direct
10 Aug, 2026 Christopher Peetz Chief Executive Officer Disposed S 11,683 $98.51 $1.15Mn 202,626 Direct
10 Aug, 2026 Christopher Peetz Chief Executive Officer Disposed S 6,017 $99.25 $597.19K 196,609 Direct
10 Aug, 2026 Christopher Peetz Chief Executive Officer Disposed S 2,300 $100.14 $230.32K 194,309 Direct
10 Aug, 2026 Christopher Peetz Chief Executive Officer Disposed M 20,000 $0.00 $0 88,487 Direct
03 Aug, 2026 Jolanda Howe Svp, Global Controller Disposed S 1,840 $105.29 $193.73K 1,274 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Acquired M 20,000 $2.94 $58.72K 214,309 Direct
06 Jul, 2026 Eric Bjerkholt Chief Financial Officer Disposed S 3,124 $121.67 $380.10K 44,057 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Disposed S 12,134 $121.65 $1.48Mn 202,175 Direct
06 Jul, 2026 Eric Bjerkholt Chief Financial Officer Disposed S 1,048 $122.43 $128.31K 43,009 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Disposed S 4,181 $122.34 $511.50K 197,994 Direct
06 Jul, 2026 Eric Bjerkholt Chief Financial Officer Disposed S 528 $123.84 $65.39K 42,481 Direct
06 Jul, 2026 Eric Bjerkholt Chief Financial Officer Disposed S 300 $124.94 $37.48K 42,181 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Disposed S 1,975 $123.74 $244.39K 196,019 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Disposed S 1,710 $124.79 $213.39K 194,309 Direct
06 Jul, 2026 Christopher Peetz Chief Executive Officer Disposed M 20,000 $0.00 $0 108,487 Direct