SCHEDULE Filed 2026-01-13 Event 2026-01-09 SEC 0001699737-26-000003 →

Samsara BioCapital, L.P. → ALUMIS INC. ALMS

Stake: 5.40% Shares: 6,345,219 CUSIP: 022307102 Class: Common Stock, $0.0001 par value per share

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 19/100 · Filer 90d Win Rate: 25% · Hist. 90d Edge: +4.3%

Filer track record (6 filings): 25% 90d win rate, +4.3% 90d edge
10 NPORT-P mutual funds holding CUSIP
Moderate short days-to-cover (4.9 DTC)

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

5 transactions

3 buys · 2 sales · 0 awards/exercises

Issuer Cluster

8 13D/G filings on this issuer

7 other filings besides this one

Filer Track Record

8 filings by this filer

7 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 4.87

11,079,936 shares short · +7.6% vs prior

Post-Filing Returns · since 2026-01-09 on ALMS

+1 day

+7.8%

+5 days

+24.4%

+30 days

+33.5%

+60 days

+43.7%

+90 days

+17.3%

+180 days

+52.0%

Anchor price 19.56 on closest trading day on/after 2026-01-09. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-09-08	AKKARAJU SRINIVAS	director	Sale	48,066	$10.55	$507K
2026-09-08	AKKARAJU SRINIVAS	director	Sale	48,065	$10.55	$507K
2026-09-08	AKKARAJU SRINIVAS	director	Buy	273,291	$10.63	$2.90M
2026-09-08	AKKARAJU SRINIVAS	director	Buy	273,290	$10.63	$2.90M
2026-09-04	AKKARAJU SRINIVAS	director	Buy	220,070	$11.17	$2.46M

Other 13D/G Filings on ALUMIS INC.

Filed	Form	Filer	Stake	Shares
2026-08-17	SCHEDULE 13D	Foresite Capital Fund VI LP	14.50%	2,203,800	view →
2026-08-06	SCHEDULE 13G	FMR LLC	—	—	view →
2026-07-27	SCHEDULE 13G	BlackRock, Inc.	—	—	view →
2026-07-02	SCHEDULE 13D/A	AyurMaya Capital Management Company, LP	12.30%	15,139,707	view →
2026-04-03	SCHEDULE 13D/A	Foresite Capital Fund VI LP	12.70%	4,247,670	view →
2026-01-12	SCHEDULE	Foresite Capital Fund VI LP	14.10%	16,189,804	view →
2025-02-10	SCHEDULE	AyurMaya Capital Management Company, LP	22.50%	10,645,966	view →

Other Filings by Samsara BioCapital, L.P.

Filed	Form	Issuer	Stake	Shares
2026-09-15	SCHEDULE 13G	PMV Pharmaceuticals, Inc.	—	—	view →
2026-05-28	SCHEDULE 13D/A	RANI THERAPEUTICS HOLDINGS, INC. RANI	—	5,661,481	view →
2026-05-22	SCHEDULE 13D/A	KALARIS THERAPEUTICS, INC. KLRS	54.20%	10,657,028	view →
2025-11-24	SCHEDULE	Nkarta, Inc. NKTX	4.90%	3,507,666	view →
2025-09-03	SCHEDULE	vTv Therapeutics Inc. VTVT	9.90%	343,223	view →
2025-03-17	SCHEDULE	Mineralys Therapeutics, Inc. MLYS	9.10%	5,736,305	view →
2024-10-07	SC	Scholar Rock Holding Corp SRRK	—	—	view →

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