Definitive Healthcare (DH) CFO has 1,881 shares withheld to cover RSU taxes

Rhea-AI Filing Summary

Definitive Healthcare Corp. reported that Chief Financial Officer Casey Heller had 1,881 shares of Class A Common Stock withheld on August 1, 2026 to satisfy tax withholding obligations upon vesting of previously reported RSUs. After this tax-withholding disposition, Heller directly holds 1,839,595 shares.

Insider Trade Summary

Net Seller: 1,881 shares

Net Sell 1 txn

Insider Heller Casey

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock F1	1,881	$0.6823	$1K

Holdings After Transaction: Class A Common Stock — 1,839,595 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: 1881.0000 shares Per-share value for withheld shares: 0.6823 per share Shares held after transaction: 1839595.0000 shares

3 metrics

Shares withheld for tax obligations 1881.0000 shares Code F tax-withholding disposition on August 1, 2026

Per-share value for withheld shares 0.6823 per share Value used for the tax-withholding share disposition

Shares held after transaction 1839595.0000 shares Direct Class A Common Stock ownership following the withholding transaction

Key Terms

tax withholding obligations, vesting and settlement, RSUs

3 terms

tax withholding obligations financial

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

vesting and settlement financial

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

RSUs financial

"vesting and settlement of previously reported RSUs"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/04/2026 - 04:05 PM Accepted by SEC EDGAR 08/04/2026 - 04:05 PM Learn about SEC filing dates

FAQ

What did Definitive Healthcare (DH) report about CFO Casey Heller’s shares?

Definitive Healthcare reported that CFO Casey Heller had 1,881 shares of Class A Common Stock withheld on August 1, 2026 to cover tax obligations tied to vesting RSUs, leaving 1,839,595 shares directly held afterward.

Was the DH CFO’s Form 4 transaction an open-market sale?

No. The Form 4 states the transaction was withholding of shares by the issuer to satisfy the CFO’s tax withholding obligations upon vesting and settlement of previously reported RSUs, not an open-market purchase or sale of shares.

How many Definitive Healthcare (DH) shares does the CFO hold after this transaction?

After the tax-withholding disposition, CFO Casey Heller directly holds 1,839,595 shares of Definitive Healthcare Class A Common Stock. This figure reflects her reported direct ownership immediately following the August 1, 2026 withholding event.

What does code F mean in the DH CFO’s Form 4 filing?

In this filing, transaction code F represents payment of a tax liability by delivering or withholding securities. Here it reflects 1,881 shares withheld by the issuer to satisfy the CFO’s tax withholding obligations related to RSU vesting.

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

The filing’s Rule 10b5-1 checkbox is not marked, indicating the reported tax-withholding disposition was not affirmed as occurring under a pre-arranged Rule 10b5-1 trading plan.

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)
08/01/2026

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	08/01/2026		F		1,881(1)	D	$0.6823	1,839,595	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	08/04/2026
	** 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)