SCHEDULE 13D/A Filed 2026-09-11 Event 2026-09-09 SEC 0001231919-26-001165 →

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

Stake: 4.90% Shares: 5,782,188 CUSIP: 63909J108 Class: Common Stock, par value $0.0001 per share

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 29/100

Active Schedule 13D filer baseline
Held by 1 tracked 13F institutional manager

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 2026-10-15

DTC 1.00

5,619,648 shares short · -2.6% 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
2026-08-28	SCHEDULE 13D/A	AH Bio Fund II, L.P.	6.00%	7,094,691	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
2026-08-28	SCHEDULE 13D/A	Nautilus Biotechnology, Inc.	6.00%	7,094,691	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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