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MIRM in the 13F filings

Mirum Pharmaceuticals Inc · CUSIP 604749101

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 10 listed it in both
Shares listed
14,787,998
combined, among listed positions
Reported value
$1.2bn
combined, at the quarter end

Among the 92 comparable managers: 14 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +158,908.

Managers listing MIRM in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Janus Henderson Group Ltd6,065,308$479m0.21%Added+1,067,72217 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,420,375$112munder 0.1%Added+137,08717 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP1,237,830$98munder 0.1%Added+447,14117 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.948,161$75munder 0.1%Added+24,65217 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC840,220$66munder 0.1%Trimmed-200,32417 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)646,466$51munder 0.1%Added+6,24817 Feb 2026 (the filing on sec.gov)
Woodline Partners LP567,894$45m0.17%Held017 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC439,085$35m0.05%Trimmed-74,36312 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP388,542$31munder 0.1%Added+45,41617 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP372,511$29munder 0.1%Trimmed-239,80713 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC297,950$24m0.08%Trimmed-91,62417 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC285,870$23munder 0.1%Trimmed-31,28017 Feb 2026 (the filing on sec.gov)
Millennium Management LLC244,273$19munder 0.1%Trimmed-64,75817 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP232,100$18munder 0.1%Trimmed-44,30017 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP190,638$15munder 0.1%Trimmed-600,03717 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC172,426$14munder 0.1%Added+44,52313 Feb 2026 (the filing on sec.gov)
PDT Partners LLC145,379$11m0.74%Held017 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP102,703$8.1munder 0.1%Added+62,87113 Feb 2026 (the filing on sec.gov)
Invesco Ltd64,951$5.1munder 0.1%Trimmed-36,52019 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP43,450$3.4munder 0.1%Held017 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC32,485$2.6munder 0.1%Added+1,09017 Feb 2026 (the filing on sec.gov)
Polen Capital Management LLC13,360$1.1munder 0.1%Added+2112 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC8,251$652kunder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Man Group PLC6,841$540kunder 0.1%Added+2,88117 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP5,692$450kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 10 in Q2 2026

Tracked managers listing it, at least.

0510152023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
MIRM by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20201$1.7mn.a.n.a.
Q3 20221$7.5mn.a.n.a.
Q4 20221$7.0mn.a.n.a.
Q1 20232$26mn.a.n.a.
Q2 20232$24mn.a.n.a.
Q3 20233$87mn.a.n.a.
Q4 20232$68m11
Q1 20242$75m11
Q2 20243$179m21
Q3 20243$192m21
Q4 20243$211m30
Q1 20253$251m30
Q2 20254$304m40
Q3 202510$609m62
Q4 20258$613m1415
Q1 202611$1.1bn2011
Q2 202610$1.6bn1120

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MIRM and LLY →MIRM and JNJ →MIRM and VRTX →Choose a stock to compare with MIRM →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MIRM, latest filings →Back to the 13F Explorer →