DV: Zagorski Mark discloses securities transactions

By AlphaYouPublished Sep 17, 2026Form 4

Stocks in this disclosure

Reported activity

Zagorski Mark

Reporting filer

Zagorski Mark reported Exercise or conversion in DoubleVerify Holdings, Inc.: 22919 units of Common Stock, dated 2026-09-15. The full Form 4 contains 16 transaction entries.

Disclosed: Sep 17, 2026

Reported details

16 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	Zagorski Mark	2026-09-15	M	Exercise or conversion	22919	0	603,283	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 22919 transaction Price Per Share: 0 id: F1 transaction Acquired Disposed Code: A shares Owned Following Transaction: 603283 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	F	Tax/exercise withholding	11701	13.50	591,582	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 id: F2 transaction Timeliness: transaction Shares: 11701 transaction Price Per Share: 13.50 transaction Acquired Disposed Code: D shares Owned Following Transaction: 591582 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	M	Exercise or conversion	12122	0	603,704	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 12122 transaction Price Per Share: 0 id: F3 transaction Acquired Disposed Code: A shares Owned Following Transaction: 603704 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	F	Tax/exercise withholding	6189	13.50	597,515	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 id: F4 transaction Timeliness: transaction Shares: 6189 transaction Price Per Share: 13.50 transaction Acquired Disposed Code: D shares Owned Following Transaction: 597515 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	M	Exercise or conversion	15219	0	612,734	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 15219 transaction Price Per Share: 0 id: F5 transaction Acquired Disposed Code: A shares Owned Following Transaction: 612734 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	F	Tax/exercise withholding	7770	13.50	604,964	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 id: F2 transaction Timeliness: transaction Shares: 7770 transaction Price Per Share: 13.50 transaction Acquired Disposed Code: D shares Owned Following Transaction: 604964 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	M	Exercise or conversion	2757	0	607,721	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 2757 transaction Price Per Share: 0 id: F6 transaction Acquired Disposed Code: A shares Owned Following Transaction: 607721 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	F	Tax/exercise withholding	1408	13.50	606,313	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 id: F4 transaction Timeliness: transaction Shares: 1408 transaction Price Per Share: 13.50 transaction Acquired Disposed Code: D shares Owned Following Transaction: 606313 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	M	Exercise or conversion	7802	0	614,115	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 7802 transaction Price Per Share: 0 id: F7 transaction Acquired Disposed Code: A shares Owned Following Transaction: 614115 direct Or Indirect Ownership: D
Common Stock	Zagorski Mark	2026-09-15	F	Tax/exercise withholding	3983	13.50	610,132	2 days	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 id: F2 transaction Timeliness: transaction Shares: 3983 transaction Price Per Share: 13.50 transaction Acquired Disposed Code: D shares Owned Following Transaction: 610132 direct Or Indirect Ownership: D
Restricted Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	22919	0	206,243	2 days	Filed terms security Title: Restricted Stock Units id: F8 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 22919 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F1 id: F1 underlying Security Title: Common Stock underlying Security Shares: 22919 shares Owned Following Transaction: 206243 direct Or Indirect Ownership: D
Performance Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	12122	0	60,605	2 days	Filed terms security Title: Performance Stock Units id: F9 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 12122 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F3 id: F3 underlying Security Title: Common Stock underlying Security Shares: 12122 shares Owned Following Transaction: 60605 direct Or Indirect Ownership: D
Restricted Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	15219	0	136,971	2 days	Filed terms security Title: Restricted Stock Units id: F8 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 15219 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F5 id: F5 underlying Security Title: Common Stock underlying Security Shares: 15219 shares Owned Following Transaction: 136971 direct Or Indirect Ownership: D
Performance Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	2757	0	2,757	2 days	Filed terms security Title: Performance Stock Units id: F9 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 2757 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F6 id: F6 underlying Security Title: Common Stock underlying Security Shares: 2757 shares Owned Following Transaction: 2757 direct Or Indirect Ownership: D
Restricted Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	7802	0	39,005	2 days	Filed terms security Title: Restricted Stock Units id: F8 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 7802 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F7 id: F7 underlying Security Title: Common Stock underlying Security Shares: 7802 shares Owned Following Transaction: 39005 direct Or Indirect Ownership: D
Restricted Stock Units (derivative)	Zagorski Mark	2026-09-15	M	Exercise or conversion	9375	0	9,375	2 days	Filed terms security Title: Restricted Stock Units id: F8 transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Timeliness: transaction Shares: 9375 id: F10 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F11 id: F11 underlying Security Title: Common Stock underlying Security Shares: 9375 shares Owned Following Transaction: 9375 direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 22919
Price: 0
Following holdings: 603,283
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 22919
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 603283
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 11701
Price: 13.50
Following holdings: 591,582
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 11701
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 591582
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 12122
Price: 0
Following holdings: 603,704
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 12122
transaction Price Per Share: 0
id: F3
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 603704
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 6189
Price: 13.50
Following holdings: 597,515
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F4
transaction Timeliness:
transaction Shares: 6189
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 597515
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 15219
Price: 0
Following holdings: 612,734
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 15219
transaction Price Per Share: 0
id: F5
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 612734
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 7770
Price: 13.50
Following holdings: 604,964
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 7770
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 604964
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 2757
Price: 0
Following holdings: 607,721
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 2757
transaction Price Per Share: 0
id: F6
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 607721
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 1408
Price: 13.50
Following holdings: 606,313
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F4
transaction Timeliness:
transaction Shares: 1408
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 606313
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 7802
Price: 0
Following holdings: 614,115
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 7802
transaction Price Per Share: 0
id: F7
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 614115
direct Or Indirect Ownership: D

Common Stock

Owner: Zagorski Mark
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 3983
Price: 13.50
Following holdings: 610,132
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 3983
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 610132
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 22919
Price: 0
Following holdings: 206,243
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 22919
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 22919
shares Owned Following Transaction: 206243
direct Or Indirect Ownership: D

Performance Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 12122
Price: 0
Following holdings: 60,605
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Performance Stock Units
id: F9
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 12122
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Common Stock
underlying Security Shares: 12122
shares Owned Following Transaction: 60605
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 15219
Price: 0
Following holdings: 136,971
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 15219
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F5
id: F5
underlying Security Title: Common Stock
underlying Security Shares: 15219
shares Owned Following Transaction: 136971
direct Or Indirect Ownership: D

Performance Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 2757
Price: 0
Following holdings: 2,757
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Performance Stock Units
id: F9
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 2757
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F6
id: F6
underlying Security Title: Common Stock
underlying Security Shares: 2757
shares Owned Following Transaction: 2757
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 7802
Price: 0
Following holdings: 39,005
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 7802
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F7
id: F7
underlying Security Title: Common Stock
underlying Security Shares: 7802
shares Owned Following Transaction: 39005
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Owner: Zagorski Mark
Date: 2026-09-15
Code: M
Action: Exercise or conversion
Quantity: 9375
Price: 0
Following holdings: 9,375
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9375
id: F10
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F11
id: F11
underlying Security Title: Common Stock
underlying Security Shares: 9375
shares Owned Following Transaction: 9375
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Zagorski Mark: Chief Executive Officer, Director.
F1: Each restricted stock unit was granted on March 12, 2026. 8.33% of the restricted stock units vested and were settled on March 15, 2026 (the "2026 Vesting Date"), and the remainder of the restricted stock units vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date.
F2: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.
F3: Each performance stock unit was granted on March 13, 2025. 41.67% of the earned shares vested and were settled on the 2026 Vesting Date, and the remainder of the earned shares vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date.
F4: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of performance stock units.
F5: Each restricted stock unit was granted on March 13, 2025. 6.25% of the restricted stock units vested and were settled on March 15, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2025 Vesting Date.
F6: Each performance stock unit was granted on December 19, 2023. 41.67% of the earned shares vested and were settled on the 2025 Vesting Date, and the remainder of the earned shares vest and settle at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date.
F7: Each restricted stock unit was granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date.
F8: Restricted stock units convert into common stock on a one-for-one basis.
F9: Performance stock units convert into common stock on a one-for-one basis.
F10: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer.
F11: Each restricted stock unit was granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Zagorski Mark

2026-09-15

Exercise or conversion

22919

603,283

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 22919
transaction Price Per Share: 0
id: F1
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 603283
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Tax/exercise withholding

11701

13.50

591,582

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 11701
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 591582
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Exercise or conversion

12122

603,704

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 12122
transaction Price Per Share: 0
id: F3
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 603704
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Tax/exercise withholding

6189

13.50

597,515

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F4
transaction Timeliness:
transaction Shares: 6189
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 597515
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Exercise or conversion

15219

612,734

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 15219
transaction Price Per Share: 0
id: F5
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 612734
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Tax/exercise withholding

7770

13.50

604,964

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 7770
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 604964
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Exercise or conversion

2757

607,721

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 2757
transaction Price Per Share: 0
id: F6
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 607721
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Tax/exercise withholding

1408

13.50

606,313

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F4
transaction Timeliness:
transaction Shares: 1408
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 606313
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Exercise or conversion

7802

614,115

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 7802
transaction Price Per Share: 0
id: F7
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 614115
direct Or Indirect Ownership: D

Common Stock

Zagorski Mark

2026-09-15

Tax/exercise withholding

3983

13.50

610,132

2 days

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
id: F2
transaction Timeliness:
transaction Shares: 3983
transaction Price Per Share: 13.50
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 610132
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

22919

206,243

2 days

Filed terms

security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 22919
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 22919
shares Owned Following Transaction: 206243
direct Or Indirect Ownership: D

Performance Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

12122

60,605

2 days

Filed terms

security Title: Performance Stock Units
id: F9
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 12122
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Common Stock
underlying Security Shares: 12122
shares Owned Following Transaction: 60605
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

15219

136,971

2 days

Filed terms

security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 15219
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F5
id: F5
underlying Security Title: Common Stock
underlying Security Shares: 15219
shares Owned Following Transaction: 136971
direct Or Indirect Ownership: D

Performance Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

2757

2,757

2 days

Filed terms

security Title: Performance Stock Units
id: F9
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 2757
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F6
id: F6
underlying Security Title: Common Stock
underlying Security Shares: 2757
shares Owned Following Transaction: 2757
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

7802

39,005

2 days

Filed terms

security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 7802
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F7
id: F7
underlying Security Title: Common Stock
underlying Security Shares: 7802
shares Owned Following Transaction: 39005
direct Or Indirect Ownership: D

Restricted Stock Units (derivative)

Zagorski Mark

2026-09-15

Exercise or conversion

9375

9,375

2 days

Filed terms

security Title: Restricted Stock Units
id: F8
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Timeliness:
transaction Shares: 9375
id: F10
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F11
id: F11
underlying Security Title: Common Stock
underlying Security Shares: 9375
shares Owned Following Transaction: 9375
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Zagorski Mark: Chief Executive Officer, Director.

F1: Each restricted stock unit was granted on March 12, 2026. 8.33% of the restricted stock units vested and were settled on March 15, 2026 (the "2026 Vesting Date"), and the remainder of the restricted stock units vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date.

F2: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units.

F3: Each performance stock unit was granted on March 13, 2025. 41.67% of the earned shares vested and were settled on the 2026 Vesting Date, and the remainder of the earned shares vest and settle at a rate of 8.33% on each quarterly anniversary of the 2026 Vesting Date.

F4: Represents shares withheld to satisfy tax withholding obligations in connection with the vesting of performance stock units.

F5: Each restricted stock unit was granted on March 13, 2025. 6.25% of the restricted stock units vested and were settled on March 15, 2025 (the "2025 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2025 Vesting Date.

F6: Each performance stock unit was granted on December 19, 2023. 41.67% of the earned shares vested and were settled on the 2025 Vesting Date, and the remainder of the earned shares vest and settle at a rate of 8.33% on each quarterly anniversary of the 2025 Vesting Date.

F7: Each restricted stock unit was granted on December 19, 2023. 6.25% of the restricted stock units vested and were settled on March 15, 2024 (the "2024 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2024 Vesting Date.

F8: Restricted stock units convert into common stock on a one-for-one basis.

F9: Performance stock units convert into common stock on a one-for-one basis.

F10: As reported previously, vested shares will be delivered to the reporting person as soon as administratively feasible following his separation from service with the Issuer.

F11: Each restricted stock unit was granted on December 12, 2022. 6.25% of the restricted stock units vested on March 15, 2023 (the "2023 Vesting Date"), and the remainder of the restricted stock units vest at a rate of 6.25% on each quarterly anniversary of the 2023 Vesting Date.