13D Filings
Nautilus Biotechnology, Inc.
NAUT
Amendment
Ownership

10.10%

Total Shares

12,815,113

Issuer CIK

1808805

CUSIP

63909J108

Event Date

Jun 19, 2025

Accepted

Jun 24, 2025, 04:42 PM

Reporting Persons (3)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
Perceptive Advisors LLC
Investment Adviser
10.10%12,815,113012,815,113
Joseph Edelman
Individual
10.10%12,815,113012,815,113
Perceptive Life Sciences Master Fund, Ltd.
CO
10.00%12,649,253012,649,253
Disclosure Items (3)

Security Title

Common Stock, $0.0001 par value per share

Issuer Name

Nautilus Biotechnology, Inc.

Issuer Address

2701 Eastlake Avenue East, Seattle, WA, 98102

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: On June 20, 2025, Michael Altman, a Managing Director of Perceptive Advisors who has served on the Issuer's board of directors (the "Board") since June 2021, ceased serving as a member of the Board following the expiration of his term. Mr. Altman did not stand for re-election at the Issuer's 2025 Annual Meeting of Stockholders.

Percentage of Class

Item 5(a) of the Schedule 13D is hereby amended and restated as follows: The information set forth in rows 11 and 13 of the cover pages to this Schedule 13D is incorporated by reference. The amounts reported to be beneficially owned by the Reporting Persons include an aggregate of 220,902 shares of Common Stock underlying stock options granted to Mr. Altman (the "Options"). The Master Fund has the right to receive the director compensation provided in respect of Mr. Altman's board service through a partial management fee offset. The percentages set forth in row 13 are based on 126,148,469 outstanding shares of Common Stock as of April 22, 2025, as reported by the Issuer in its Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on April 29, 2025, and assume the exercise of the Options for an aggregate of 220,902 shares of Common Stock.

Number of Shares

The information set forth in rows 7 through 10 of the cover pages to this Schedule 13D is incorporated by reference.

Nautilus Biotechnology, Inc. — Schedule 13D | 13D Filings