Definitive Healthcare CFO has 41K shares withheld

Definitive Healthcare’s CFO had shares withheld to cover RSU-related taxes, leaving a large direct shareholding.

Rhea-AI Filing Summary

Definitive Healthcare Corp. (DH) reported that Chief Financial Officer Casey Heller had 41,093 shares of Class A common stock withheld by the issuer on September 1, 2026 to satisfy tax withholding obligations related to the vesting and settlement of previously reported RSUs, at a reference price of $0.9023 per share. Following this tax-withholding disposition, Heller directly holds 1,798,502 shares of Class A common stock, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Tax Withholding: 41,093 shares

Tax Withholding 1 txn

Insider Heller Casey

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock F1	41,093	$0.9023	$37K

Holdings After Transaction: Class A Common Stock — 1,798,502 shares (Direct)

Footnotes (1)

1. F1. The transaction reported 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 RSUs.

Key Figures

Shares withheld for tax obligations: 41,093 shares Reference price per share: $0.9023 per share Shares held after transaction: 1,798,502 shares +1 more

4 metrics

Shares withheld for tax obligations 41,093 shares Class A common stock withheld on September 1, 2026 for RSU-related tax withholding

Reference price per share $0.9023 per share Price associated with the September 1, 2026 tax-withholding disposition

Shares held after transaction 1,798,502 shares Direct Class A common stock holdings of CFO Casey Heller following the transaction

Transaction type Payment of tax liability by delivering or withholding securities Code F non-derivative disposition on September 1, 2026

Key Terms

Restricted Stock Units, withholding of shares, tax withholding obligations

3 terms

Restricted Stock Units financial

"in connection with the vesting and settlement of previously reported RSUs"

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.

withholding of shares financial

"represents the withholding of shares by the issuer to satisfy"

tax withholding obligations financial

"to satisfy the reporting person's tax withholding obligations"

FAQ

What did Definitive Healthcare (DH) disclose about CFO Casey Heller’s recent Form 4 transaction?

The company disclosed that CFO Casey Heller had 41,093 shares of Class A common stock withheld on September 1, 2026 to satisfy tax withholding obligations tied to vesting RSUs.

How many Definitive Healthcare (DH) shares were involved in the CFO’s tax-withholding transaction?

The transaction involved 41,093 shares of Definitive Healthcare Class A common stock, withheld by the issuer to cover the CFO’s tax withholding obligations upon vesting and settlement of previously reported RSUs.

At what price were the withheld DH shares valued in the CFO’s Form 4?

The withheld shares were reported at $0.9023 per share in connection with the tax-withholding disposition related to the vesting and settlement of previously reported RSUs.

How many Definitive Healthcare (DH) shares does CFO Casey Heller hold after this Form 4 transaction?

After the tax-withholding disposition, CFO Casey Heller directly holds 1,798,502 shares of Definitive Healthcare Class A common stock, as reported in the Form 4 filing.

Was the DH CFO’s Form 4 transaction executed under a Rule 10b5-1 trading plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported for this transaction. It reflects issuer share withholding to satisfy tax obligations on vesting RSUs.

What is the nature of the DH CFO’s Form 4 transaction involving RSUs?

The transaction represents the withholding of shares by the issuer to satisfy the CFO’s tax withholding obligations in connection with the vesting and settlement of previously reported RSUs, rather than an open-market sale or purchase.

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Available on EDGAR 09/03/2026 - 04:07 PM Accepted by SEC EDGAR 09/03/2026 - 04:05 PM 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^*

Heller Casey

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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	09/01/2026		F		41,093(1)	D	$0.9023	1,798,502	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. The transaction reported 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 RSUs.

	/s/ Jonathan Paris, Attorney-in-Fact	09/03/2026
	** 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)