[Form 4] Definitive Healthcare Corp. Insider Trading Activity

Rhea-AI Filing Summary

Form 4 filed 08/05/2025 discloses that Definitive Healthcare (DH) Chief Operating Officer Kate Marie Shamsuddin satisfied tax-withholding obligations from previously granted restricted stock units. On 08/01/2025 she surrendered 4,741 Class A common shares to the issuer at an imputed price of $3.74; no cash was received. The transaction is coded “F,” indicating share withholding rather than an open-market sale.

After the withholding, Shamsuddin directly owns 694,149 DH shares. No derivative securities were acquired or disposed of, and no additional insider transactions were reported. The surrendered shares equal roughly 0.7 % of her post-transaction holdings, suggesting minimal impact on insider ownership concentration or public float.

Insights

Securities Analyst

TL;DR: Routine tax-withholding; negligible size, neutral signal for DH investors.

The use of Code F signals a non-discretionary share surrender tied to RSU vesting, not a market-sentiment-driven sale. The 4,741 shares foregone represent less than 1 % of the executive’s stake, leaving a sizeable 694 k-share position that continues to align management incentives with shareholders. Because no open-market activity or derivative positions were involved, liquidity and float remain virtually unchanged. The filing is therefore operationally and valuation-wise immaterial.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Shamsuddin Kate Marie

(Last) (First) (Middle)

C/O DEFINITIVE HEALTHCARE CORP.

492 OLD CONNECTICUT PATH, SUITE 401

(Street)

FRAMINGHAM MA 01701

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Definitive Healthcare Corp. [ DH ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/01/2025

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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
Class A Common Stock	08/01/2025		F(1)		4,741	D	$3.74	694,149	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents the withholding of shares by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting and settlement of previously reported restricted stock units.

	/s/ Kate Marie Shamsuddin	08/05/2025
	** 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 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.

FAQ

How many Definitive Healthcare (DH) shares did the COO dispose of?

She surrendered 4,741 Class A shares on 08/01/2025.

What does transaction code "F" signify in this Form 4?

Code F indicates shares withheld by the issuer to cover tax obligations from equity-award vesting.

How many DH shares does Kate Marie Shamsuddin own after the transaction?

She directly owns 694,149 shares following the withholding.

Was this an open-market sale by the insider?

No. The filing states it was issuer share withholding for taxes, not an open-market trade.

At what price were the surrendered shares valued?

The shares were valued at $3.74 each for withholding purposes.

Were any derivative securities involved in this Form 4?

None. Table II lists no derivative transactions.