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* Krantz Jason Ronald (Last) (First) (Middle) C/O DEFINITIVE HEALTHCARE CORP. 550 COCHITUATE RD (Street) FRAMINGHAM MA 01701 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/15/2021	3. Issuer Name and Ticker or Trading Symbol Definitive Healthcare Corp. [ DH ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner X Officer (give title below) Other (specify below) Chief Executive Officer	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)
Class A common stock	144,444(1)	D

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)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
LLC Units of AIDH Topco, LLC	(2)	(2)	Class A common stock	855,089	(2)	D
LLC Units of AIDH Topco, LLC	(2)	(2)	Class A common stock	21,139,192	(2)	I	By trust

Explanation of Responses:

1. Represents restricted stock units subject to time-based vesting, 25% of which vest on the first anniversary of the date of grant, and the remaining 75% of which vest in substantially equal installments at the end of each three-month period measured from the first anniversary of the date of grant for a period of 36 months, subject to the Reporting Person's continued service with the Issuer and the terms of the applicable award agreement.

2. Certain unvested awards vest in equal installments on each of the first, second and third anniversaries of the Issuer's initial public offering, and the remainder of the unvested awards continue to vest pursuant to a four-year annual vesting schedule. Once vested, the Reporting Person may exchange LLC Units of AIDH Topco, LLC for shares of Class A Common Stock of the Issuer on a one-for-one basis, subject to certain exceptions, conditions and adjustments. The LLC Units of AIDH Topco, LLC have no expiration date. At the time of any such exchange, an equal number of shares of Class B Common Stock of the Issuer held by the Reporting Person, which have no economic value and entitle holders thereof to one vote per share on all matters on which stockholders of the Issuer are entitled to vote generally, are cancelled.

Remarks:

Exhibit 24 - Power of Attorney

	By: /s/ David Samuels, as attorney-in-fact	09/15/2021
	** 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.
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