ALMS in the 13F filings

Alumis Inc · CUSIP 022307102

Sector · Pharmaceuticals and biotechnology Theme · Healthcare: biopharma and medtech· L3VLUP-defined Theme · Pharmaceutical preparations

Quarter

Q2 2026 Q1 2026 Q3 2025 Q2 2025

Quarter end: 31 Mar 2026; the date the book describes
Filed: 18 May 2026; latest of these filings; the earliest 12 May 2026
Managers listing it: 25; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q4 2025 and Q1 2026; 0 listed it in both
Shares listed: 13,885,405; combined, among listed positions
Reported value: $305m; combined, at the quarter end

1 line marked †. Value as filed implies a price far from other filers'. Each counts in holders and value as filed, and is left out of the net change in shares.

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 20 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +10,153,113.

Managers listing ALMS in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

25 of 25 holders

				Action		Filing
T. Rowe Price Associates Inc	3,286,753	$72m	under 0.1%	Added	+3,236,331	15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd	2,124,408	$47m	under 0.1%	New	new	18 May 2026 (the filing on sec.gov)
Invesco Ltd	1,511,537	$33m	under 0.1%	Added	+1,089,718	12 May 2026 (the filing on sec.gov)
Marshall Wace LLP	1,172,749	$26m	under 0.1%	Added	+799,848	15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	973,782	$21m	under 0.1%	Added	+949,795	15 May 2026 (the filing on sec.gov)
Voloridge Investment Management LLC	749,099	$17m	0.07%	New	new	15 May 2026 (the filing on sec.gov)
Two Sigma Investments LP	658,115	$14m	under 0.1%	Added	+359,896	15 May 2026 (the filing on sec.gov)
Millennium Management LLC	606,284	$13m	under 0.1%	Trimmed	-544,834	15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.	572,129	$13m	under 0.1%	Added	+340,382	15 May 2026 (the filing on sec.gov)
Point72 Asset Management LP	362,985	$8.0m	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Citadel Advisors LLC	351,507	$7.7m	under 0.1%	Added	+232,196	15 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP	266,243	$5.9m	under 0.1%	Added	+255,046	14 May 2026 (the filing on sec.gov)
Wellington Management Group LLP	239,231	$5.3m	under 0.1%	Added	+70,138	15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP	194,355	$4.3m	under 0.1%	Trimmed	-13,778	15 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP	193,395	$4.3m	under 0.1%	New	new	13 May 2026 (the filing on sec.gov)
AQR Capital Management LLC	146,682	$3.2m	under 0.1%	Added	+8,890	15 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC	114,198	$2.5m	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Tudor Investment Corp	106,376	$2.3m	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC	75,167	$1.7m	under 0.1%	Trimmed	-33,033	14 May 2026 (the filing on sec.gov)
Moore Capital Management LP	41,370	$911k	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Walleye Capital LLC	31,778	$700k	under 0.1%	New	new	13 May 2026 (the filing on sec.gov)
AllianceBernstein LP	68,094	$665k	under 0.1%	Trimmed	-8,500	15 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	27,580	$608k	under 0.1%	Trimmed	-7,337	15 May 2026 (the filing on sec.gov)
Farallon Capital Management LLC	11,000	$242k	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC† Value as filed implies a price far from other filers'.	588	$12k	under 0.1%	New	new	13 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

There is no earlier quarter on file to compare with.

Increases

T. Rowe Price Associates Incexisting position · 3,286,753 shares now+3,236,331
Janus Henderson Group Ltdnew position · 2,124,408 shares now+2,124,408
Invesco Ltdexisting position · 1,511,537 shares now+1,089,718
Fidelity (FMR LLC)existing position · 973,782 shares now+949,795
Marshall Wace LLPexisting position · 1,172,749 shares now+799,848

Reductions

Millennium Management LLCexisting position · 606,284 shares now-544,834
Renaissance Technologies LLCexisting position · 75,167 shares now-33,033
Susquehanna International Group LLPexisting position · 194,355 shares now-13,778
AllianceBernstein LPexisting position · 68,094 shares now-8,500
Brevan Howard Capital Management LPexisting position · 27,580 shares now-7,337

New positions and exits

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

New (10)

Exited (5)

Jane Street Group LLCwas $1.7m
Verition Fund Management LLCwas $781k
Balyasny Asset Management LLCwas $242k
Schonfeld Strategic Advisors LLCwas $225k
PDT Partners LLCwas $142k

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.

1 in Q2 2025 to 4 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

Compare with…

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

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

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 ALMS, latest filings →Back to the 13F Explorer →

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Quarter	Holders	Reported value	Buyers	Sellers
Q2 2025	1	$4.2m	1	0
Q3 2025	1	$5.6m	0	0
Q1 2026	5	$70m	20	10
Q2 2026	4	$93m	9	17