Sec Form 4 Filing - Sullivan Thomas Joseph @ NATUS MEDICAL INC - 2022-07-21

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Sullivan Thomas Joseph 2. Issuer Name and Ticker or Trading Symbol NATUS MEDICAL INC [ NTUS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) C/O NATUS MEDICAL INCORPORATED, 3150 PLEASANT VIEW ROAD 3. Date of Earliest Transaction (MM/DD/YY) 07/21/2022 (Street) MIDDLETON, WI53562 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock, $0.001 par value per share 07/21/2022 A 648,554( 1 ) A $ 0 720,903 D Common Stock, $0.001 par value per share 07/21/2022 D 720,903( 2 ) D $ 33.5( 3 ) 0 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Sullivan Thomas Joseph C/O NATUS MEDICAL INCORPORATED 3150 PLEASANT VIEW ROAD MIDDLETON, WI53562 X President and CEO Signatures /s/ DOUGLAS BALOG by POWER OF ATTORNEY 07/21/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the number of shares of Common Stock subject to performance-based stock unit awards ("RSUs") that vested and were settled as a result of the merger ("Merger") pursuant to the previously announced Agreement and Plan of Merger, dated April 17, 2022, between Prince Parent Inc. ("Parent"), Prince Mergerco Inc, and Issuer ("Merger Agreement"). Pursuant to, and subject to the terms of a retention agreement, dated April 17, 2022, between Mr. Sullivan, Parent and Issuer, $6,000,000 of the amount payable to Mr. Sullivan in respect of the RSUs did not become payable upon the Merger and, instead will become payable 50% on the six-month anniversary of the Merger and 50% on the one-year anniversary of the Merger ("Retention Holdback"). ( 2 )Disposed of as a result of the Merger (subject to the Retention Holdback). ( 3 )Each share of Common Stock, including shares underlying equity awards, was cancelled pursuant to the Merger Agreement in exchange for the right to receive the cash consideration provided in the Merger Agreement (in the case of Mr. Sullivan, subject to the Retention Holdback), subject to applicable tax withholding.

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 4(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.