SCHEDULE 13D/A Filed 2026-08-28 Event 2026-08-26 SEC 0001725721-26-000006 →

AH Bio Fund II, L.P. → Nautilus Biotechnology, Inc. NAUT

Stake: 6.00% Shares: 7,094,691 CUSIP: 63909J108 Class: Common Stock, par value $0.0001 per share

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)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

9 13D/G filings on this issuer

8 other filings besides this one

Filer Track Record

4 filings by this filer

3 other filings in the data moat

Short Interest · settle 2026-09-30

DTC 1.42

5,771,054 shares short · +41.4% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $119K

Point72 Asset Mgmt

Other 13D/G Filings on Nautilus Biotechnology, Inc.

Filed	Form	Filer	Stake	Shares
2026-09-11	SCHEDULE 13D/A	AH Bio Fund II, L.P.	4.90%	5,782,188	view →
2026-08-14	SCHEDULE 13D/A	PERCEPTIVE ADVISORS LLC	9.10%	11,634,211	view →
2026-06-30	SCHEDULE 13D/A	AH Bio Fund II, L.P.	—	8,366,966	view →
2026-06-04	SCHEDULE 13D/A	AH Bio Fund II, L.P.	9.90%	11,682,032	view →
2025-03-05	SCHEDULE	Mallick Parag	17.40%	22,263,911	view →
2025-03-05	SCHEDULE	Patel Sujal M	15.70%	20,297,732	view →
2025-01-31	SCHEDULE	PERCEPTIVE ADVISORS LLC	10.00%	12,594,211	view →
2023-03-01	SC	Nautilus Biotechnology, Inc.	—	—	view →

Other Filings by AH Bio Fund II, L.P.

Filed	Form	Issuer	Stake	Shares
2026-09-11	SCHEDULE 13D/A	Nautilus Biotechnology, Inc.	4.90%	5,782,188	view →
2026-06-30	SCHEDULE 13D/A	Nautilus Biotechnology, Inc. NAUT	—	8,366,966	view →
2026-06-04	SCHEDULE 13D/A	Nautilus Biotechnology, Inc. NAUT	9.90%	11,682,032	view →

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