Alumis Inc. (ALMS) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

104,483,019Shares Outstanding

37,734,707Shares held by institutions

$1,002,988,512Value of institutional holdings

74.47%Institutional ownership %

13.14%Shares Changed QoQ

125No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for Alumis Inc. (NASDAQ:ALMS) includes 125 filers as of the latest reporting cycle ending December 2025.

Alumis saw its institutional ownership percentage fell to 74.5% in December 2025 from 75.8% in September 2025.
Quarterly data indicates a 13.14% shift in institutional share volume, and the annual owner count reflects an increase of 92.31%.
A review of institutional activity for Alumis shows 71 of 125 filers increasing their positions, while 33 reduced their stake, and 21 remained unchanged.
Collectively, institutional investors increased their stake in Alumis to 77.81Mn shares as of December 2025, a change that is up by 9.04Mn shares quarter on quarter and up 37.55Mn shares year over year.
The top institutional stake in Alumis as of December 31, 2025 belongs to AyurMaya Capital Management Company, LP, which owns 15.14Mn shares, or 14.49% of the company.
Among the most significant buyers of Alumis during December 2025 were Saturn V Capital Management LP (3.14Mn), Octagon Capital Advisors LP (2.53Mn), MPM BioImpact LLC (2.40Mn), Cormorant Asset Management, LP (1.49Mn), Samsara BioCapital, LLC (955.61K).
Leading sellers of Alumis stock in December 2025 included Trium Capital LLP (2.23Mn), ORBIMED ADVISORS LLC (823.69K), UBS Group AG (648.68K), JANE STREET GROUP, LLC (642.58K), CITADEL ADVISORS LLC (219.94K).
The top 10 institutional holders of Alumis for the quarter ending December 2025 included AyurMaya Capital Management Company, LP (15.14Mn), Foresite Capital Management V, LLC (5.78Mn), Samsara BioCapital, LLC (5.76Mn), venBio Partners LLC (4.62Mn), BlackRock, Inc. (4.57Mn), Foresite Capital Management VI LLC (4.25Mn), VANGUARD GROUP INC (4.10Mn), Cormorant Asset Management, LP (3.64Mn), Saturn V Capital Management LP (3.14Mn), Nextech Invest, Ltd. (2.92Mn).

125 Institutional Holders

37,734,707 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
AyurMaya Capital Management Company, LP	31 Dec, 2025	15,139,706	0	0.00%	$147,763,531.00
Foresite Capital Management V, LLC	31 Dec, 2025	5,779,348	0	0.00%	$56,406,436.00
Samsara BioCapital, LLC	31 Dec, 2025	5,756,984	955,614	19.90%	$56,188,164.00
venBio Partners LLC	31 Dec, 2025	4,619,803	0	0.00%	$45,089,277.00
BlackRock, Inc.	31 Dec, 2025	4,566,502	373,425	8.91%	$44,569,059.00
Foresite Capital Management VI LLC	31 Dec, 2025	4,247,670	0	0.00%	$41,457,259.00
VANGUARD GROUP INC	31 Dec, 2025	4,103,290	73,675	1.83%	$40,048,110.00
Cormorant Asset Management, LP	31 Dec, 2025	3,635,596	1,488,200	69.30%	$35,483,417.00
Saturn V Capital Management LP	31 Dec, 2025	3,135,953	3,135,953	0.00%	$30,606,901.00
Nextech Invest, Ltd.	31 Dec, 2025	2,915,998	0	0.00%	$28,460,140.00
Octagon Capital Advisors LP	31 Dec, 2025	2,530,700	2,530,700	0.00%	$24,699,632.00
MPM BioImpact LLC	31 Dec, 2025	2,401,992	2,401,992	0.00%	$23,443,442.00
SR ONE CAPITAL MANAGEMENT, LP	31 Dec, 2025	1,959,896	0	0.00%	$19,128,585.00
BAKER BROS. ADVISORS LP	31 Dec, 2025	1,562,500	0	0.00%	$15,250,000.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,487,626	94,340	6.77%	$14,522,800.00
STATE STREET CORP	31 Dec, 2025	1,259,446	157,560	14.30%	$12,292,193.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	1,151,118	834,089	263.10%	$11,234,912.00
ORBIMED ADVISORS LLC	31 Dec, 2025	1,102,730	-823,693	-42.76%	$10,762,645.00
Trium Capital LLP	31 Dec, 2025	893,107	-2,229,004	-71.39%	$8,716,724.00
Omega Fund Management, LLC	31 Dec, 2025	653,223	0	0.00%	$6,375,456.00

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