Bonnie Cook Form 4 MANTECH INTERNATIONAL / Bonnie Cook ownership change

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

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

1. Name and Address of Reporting Person^*

Cook Bonnie

(Last) (First) (Middle)

2251 CORPORATE PARK DRIVE

SUITE 600

(Street)

HERNDON VA 20171

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MANTECH INTERNATIONAL CORP [ MANT ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
EVP Business Operations

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2021

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	03/15/2021		M		2,977	A	(1)	8,269	D
Class A Common Stock	03/15/2021		F		897	D	$82.04	7,372	D
Class A Common Stock								847	I	By the ManTech Employee Stock Ownership Plan

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
Restricted Stock Units	(2)	03/15/2021		A		6,160		(3)	(3)	Class A Common Stock	6,160	$0.00	6,160	D
Restricted Stock Units	(1)	03/15/2021		M			800	(4)	(4)	Class A Common Stock	800	$0.00	0	D
Restricted Stock Units	(1)	03/15/2021		M			800	(5)	(5)	Class A Common Stock	800	$0.00	800	D
Restricted Stock Units	(1)	03/15/2021		M			1,377	(6)	(6)	Class A Common Stock	1,377	$0.00	2,753	D

Explanation of Responses:

1. Restricted stock units convert into common stock on a one-for-one basis.

2. Each restricted stock unit represents a contingent right to receive one share of ManTech International Corporation common stock.

3. The restricted stock units (RSUs) were granted on March 15, 2021, with one-third of the total grant vesting on March 15, 2022, one-third of the total grant vesting on March 15, 2023, and the remaining one-third vesting on March 15, 2024.

4. On March 15, 2018, the reporting person was granted 2,400 RSUs, vesting in three annual installments, beginning on the first anniversary of the grant date.

5. On March 15, 2019, the reporting person was granted 2,400 RSUs, vesting in three annual installments, beginning on the first anniversary of the grant date.

6. On March 15, 2020, the reporting person was granted 4,130 RSUs, vesting in three annual installments, beginning on the first anniversary of the grant date.

Remarks:

	/s/ Michael R. Putnam, by Power of Attorney	03/17/2021
	** 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 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).
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