Ticker · CUSIP 604749101

MIRM

MIRUM PHARMACEUTICALS INC
Healthcare·Biotechnology
···Share
Holders (tracked)
15
Combined shares
6,053,178
Combined value
$478.14M
Last close
$97.95
Quarter
2025Q4
Price · 1Y$97.95+58.85 (+150.51%)H $108.62 · L $38.39 · Avg Vol 671K
Position opened
$40.00$60.00$80.00$100.00VolJul 25Oct 25Jan 26Apr 26
Tracked holders · last 8 quarters
+4 vs previous quarter over the last 8.
1592024Q12025Q4
Price is +24.0% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

22 events
  1. Ramasastry Saira
    2026-04-15
    Sold $193.8K @ $96.90
    Insider sell
  2. Ken Griffin (Citadel Advisors) trimmed2026-02-17
    −200,324 shares · 2025Q4
    Position
  3. D.E. Shaw & Co. added2026-02-17
    +24,652 shares · 2025Q4
    Position
  4. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +5,205 shares · 2025Q4
    Position
  5. AQR Capital Management added2026-02-17
    +1,090 shares · 2025Q4
    Position
  6. Two Sigma Investments added2026-02-17
    +45,416 shares · 2025Q4
    Position
  7. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −64,758 shares · 2025Q4
    Position
  8. Steve Cohen (Point72) trimmed2026-02-17
    −600,037 shares · 2025Q4
    Position
  9. T. Rowe Price added2026-02-17
    +137,087 shares · 2025Q4
    Position
  10. Wellington Management added2026-02-17
    +447,141 shares · 2025Q4
    Position
  11. Renaissance Technologies trimmed2026-02-12
    −74,363 shares · 2025Q4
    Position
  12. Norges Bank (Norway SWF) opened position2026-02-10
    +263,175 shares · 2025Q4
    Position
  13. Ken Fisher (Fisher Asset Mgmt) opened position2026-02-09
    +14,089 shares · 2025Q4
    Position
  14. AQR Capital Management trimmed2025-11-14
    −16,121 shares · 2025Q3
    Position
  15. Steve Cohen (Point72) added2025-11-14
    +531,809 shares · 2025Q3
    Position
  16. Two Sigma Investments added2025-11-14
    +171,312 shares · 2025Q3
    Position
  17. Wellington Management added2025-11-14
    +672,118 shares · 2025Q3
    Position
  18. Izzy Englander (Millennium Mgmt) added2025-11-14
    +20,872 shares · 2025Q3
    Position
  19. D.E. Shaw & Co. added2025-11-14
    +368,552 shares · 2025Q3
    Position
  20. T. Rowe Price trimmed2025-11-14
    −133,927 shares · 2025Q3
    Position
  21. Renaissance Technologies added2025-11-13
    +117,100 shares · 2025Q3
    Position
  22. Norges Bank (Norway SWF) opened position2025-11-12
    +248,157 shares · 2024Q3
    Position

Insider activity

Last 30 days
Net (open-market)
−$193.8K
Buys
0 · $0
Sells
1 · $193.8K
Unique insiders
1
DateInsiderCodeSharesPriceValue
04-15Ramasastry Saira
Insider
M2,000$23.51$47.0K
04-15Ramasastry Saira
Insider
S2,000$96.90$193.8K
View full insider history for MIRM →
Follow-the-investor returns
If you'd copied each holder of MIRM…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Paul Tudor Jones (Tudor Investment)2020Q4$26.55+269.0%$510K
T. Rowe Price2022Q3$34.90+180.6%$139.1M
Izzy Englander (Millennium Mgmt)2019Q3$36.04+171.8%$23.9M
Norges Bank (Norway SWF)2024Q3$41.28+137.3%$25.8M
AQR Capital Management2022Q3$42.44+130.8%$3.2M
Renaissance Technologies2020Q2$51.77+89.2%$43.0M
D.E. Shaw & Co.2020Q2$55.85+75.4%$92.9M
Two Sigma Investments2020Q2$57.29+71.0%$38.1M
Wellington Management2020Q4$70.99+38.0%$121.2M
Steve Cohen (Point72)2020Q2$78.05+25.5%$18.7M
Steve Cohen (Point72)2020Q2$78.05+25.5%$18.7M
Steve Cohen (Point72)2020Q2$78.05+25.5%$18.7M
Ken Griffin (Citadel Advisors)2020Q2$78.90+24.1%$82.3M
Ken Griffin (Citadel Advisors)2020Q2$78.90+24.1%$82.3M
Ken Fisher (Fisher Asset Mgmt)2025Q4$78.99+24.0%$1.4M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions3
Added to5
Trimmed4
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
9
$38.2M
2022Q2
7
$42.9M
2022Q3
8
$62.3M
2022Q4
9
$81.8M
2023Q1
10
$93.0M
2023Q2
10
$111.9M
2023Q3
11
$140.7M
2023Q4
9
$165.1M
2024Q1
9
$157.7M
2024Q2
9
$224.6M
2024Q3
10
$151.2M
2024Q4
10
$161.5M
2025Q1
11
$211.0M
2025Q2
11
$238.5M
2025Q3
11
$444.2M
2025Q4
15
$478.1M

Who owns MIRM

15 super-investors · 2025Q4
Tracked stake
6.05M
shares
Combined value
$478M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added5Trim7
#ManagerSharesValue
1T. Rowe Price1.42M$112M
2Wellington Management1.24M$98M
3D.E. Shaw & Co.948.2K$75M
4Ken Griffin
Citadel Advisors
840.2K$66M
5Renaissance Technologies439.1K$35M
6Two Sigma Investments388.5K$31M
7Norges Bank
Norway SWF
263.2K$21M
8Izzy Englander
Millennium Mgmt
244.3K$19M
9Steve Cohen
Point72
190.6K$15M
10AQR Capital Management32.5K$3M
11Ken Fisher
Fisher Asset Mgmt
14.1K$1M
12Ken Griffin
Citadel Advisors
12.7K$1M
13Steve Cohen
Point72
8.2K$648K
14Steve Cohen
Point72
8.2K$648K
15Paul Tudor Jones
Tudor Investment
5.2K$411K

Recent moves

20 transactions
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