SEC FORM 3

SEC FORM 3 SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

McIlwain Matthew S

(Last)

(First)

(Middle)

C/O NAUTILUS BIOTECHNOLOGY, INC.

425 PONTIUS AVE N, STE 202

(Street)

SEATTLE

98109

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/09/2021

3. Issuer Name and Ticker or Trading Symbol
Nautilus Biotechnology, Inc. [ NAUT ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	322,105	D
Common Stock	5,798,394	I	By Madrona Venture Fund VI, LP⁽¹⁾
Common Stock	222,376	I	By Madrona Venture Fund VI-A, LP⁽²⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option (Right to Buy)	⁽³⁾	01/31/2031	Common Stock	36,280	10	D

Explanation of Responses:

1. Shares held by Madrona Venture Fund VI, LP ("Madrona Fund VI"). Madrona Investment Partners VI, L.P. ("Madrona Partners VI") is the general partner of Madrona Fund VI, and Madrona VI General Partner, LLC ("Madrona VI LLC") is the general partner of Madrona Partners VI. The reporting person, is a managing member of Madrona VI LLC. The reporting person disclaims beneficial ownership over such securities except to the extent of his pecuniary interest therein and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

2. Shares held by Madrona Venture Fund VI-A, LP ("Madrona Fund VI-A"). Madrona Partners VI is the general partner of Madrona Fund VI-A, and Madrona VI LLC is the general partner of Madrona Partners VI. The reporting person, is a managing member of Madrona VI LLC. The reporting person disclaims beneficial ownership over such securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of benefical ownership of all of the reported shares for purposes of Section 16 or for any other purpose.

3. Subject to reporting person's continuous status as a "Service Provider" (as defined in the Nautilus Subsidiary, Inc. 2017 Equity Incentive Plan) through the applicable vesting date, one hundred percent (100%) of the shares subject to the Option shall vest on the earlier of (a) the one (1) year anniversary of the Vesting Commencement Date (as defined below) and (b) the day immediately before the date of the next annual meeting of stockholders of the Company (or in the event of a merger or consolidation involving the Company in which the Company is a wholly-owned subsidiary immediately following such merger or consolidation, the next annual meeting of stockholders of the Company's parent). The Vesting Commencement Date is January 31, 2021.

Remarks:

Exhibit 24: Power of Attorney

	/s/ Anna Mowry, as Attorney-in-Fact	06/09/2021
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

SEC Form 3: McIlwain Matthew S claimed ownership of 6,342,875 units of Common Stock