Definitive Healthcare CEO receives 2.63M-unit grant

The award's vesting is conditioned on continued service, with the first 25% scheduled for September 8, 2027.

Rhea-AI Filing Summary

Definitive Healthcare Corp. Chief Executive Officer Clay Brian Ritchey received a direct award of 2,626,263 restricted stock units (RSUs) on October 23, 2026. Each RSU represents a contingent right to receive one share of Class A common stock. The reported direct position after the award was 2,626,263 RSUs. Twenty-five percent vest on September 8, 2027, followed by vesting of 6.25% every three months over the subsequent three years, subject to continued service through each vesting date.

Insider Trade Summary

Grant/Award: 2,626,263 shares

Grant/Award 1 txn

Insider Ritchey Clay Brian

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock F1	2,626,263	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 2,626,263 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units ("RSUs"), each representing a contingent right to receive one share of the Issuer's Class A Common Stock, par value $0.001, with 25% of the RSUs vesting on September 8, 2027, followed by vesting of 6.25% every three months thereafter over the subsequent three years, subject to the Reporting Person's continued service with the Issuer through each such vesting date.

Key Figures

RSUs awarded: 2,626,263 RSUs Initial vesting: 25% Subsequent vesting: 6.25% +1 more

4 metrics

RSUs awarded 2,626,263 RSUs Direct award on October 23, 2026

Initial vesting 25% Vests on September 8, 2027

Subsequent vesting 6.25% Vests every three months

Subsequent vesting period Three years After the initial vesting date

Key Terms

restricted stock units, contingent right, vesting

3 terms

restricted stock units financial

"Represents restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"each representing a contingent right to receive one share"

vesting financial

"with 25% of the RSUs vesting"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many RSUs did DH CEO Clay Brian Ritchey receive?

Definitive Healthcare Corp. Chief Executive Officer Clay Brian Ritchey received 2,626,263 RSUs on October 23, 2026. Each RSU represents a contingent right to receive one share of Class A common stock.

When do Clay Brian Ritchey's DH RSUs vest?

Twenty-five percent of the RSUs vest on September 8, 2027, followed by vesting of 6.25% every three months over the subsequent three years. Vesting is subject to continued service through each vesting date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/27/2026 - 04:05 PM EDT Accepted by SEC EDGAR 10/27/2026 - 04:05 PM EDT Learn about SEC filing dates

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

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^*

Ritchey Clay Brian

(Last) (First) (Middle)

C/O DEFINITIVE HEALTHCARE CORP.

492 OLD CONNECTICUT PATH, SUITE 401

(Street)

FRAMINGHAM MASSACHUSETTS 01701

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/23/2026

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

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

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

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	10/23/2026		A		2,626,263(1)	A	$0	2,626,263	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 restricted stock units ("RSUs"), each representing a contingent right to receive one share of the Issuer's Class A Common Stock, par value $0.001, with 25% of the RSUs vesting on September 8, 2027, followed by vesting of 6.25% every three months thereafter over the subsequent three years, subject to the Reporting Person's continued service with the Issuer through each such vesting date.

	/s/ Jonathan Paris, Attorney-in-Fact	10/27/2026
	** 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.
* Form 4: SEC 1474 (03-26)