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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Employees American Registry for Internet Numbers Ltd. Mark Kosters

Mark Kosters

Key employee

Chief Technology Officer at American Registry for Internet Numbers Ltd.

Fiscal year ended December 31, 2024. Published on January 25, 2026.

$431,894
2024

Total compensation

Mark Kosters has been listed as an employee of American Registry for Internet Numbers Ltd. in Form 990 filings since at least fiscal year 2016. Total compensation for Mark Kosters has increased by 38.6% from 2016 to 2024.

Annual compensation details

$431,894
+3.7%
Chief Technology Officer
2024
$344k org
40 hrs/wk
$88k other
--
$416,315
+6.8%
Chief Technology Officer (Cto)
2023
$328k org
40 hrs/wk
$90k other
--

Total compensation by year

Compare the compensation of Mark Kosters to:

2024

Other employees at American Registry for Internet Numbers Ltd.

John Curran
President and Chief Executive Officer
$694,471
$617,621 from orgNo related comp$76,850 other
Richard Jimmerson
Chief Operating Officer
$507,366
$418,371 from orgNo related comp$88,995 other
Brian Kirk
Chief Financial Officer
$475,105
$401,282 from orgNo related comp$73,823 other
John Sweeting
CXO
$441,118
$364,462 from orgNo related comp$76,656 other
Michael Abejuela
General Counsel
$425,807
$369,155 from orgNo related comp$56,652 other
Erin Alligood
Chief Human Resources Officer
$423,396
$338,220 from orgNo related comp$85,176 other
Einar Bohlin
Vice President, Government Affairs
$368,713
$298,383 from orgNo related comp$70,330 other
Robert Christian Johnson
CISO
$361,459
$282,560 from orgNo related comp$78,899 other
Reginald Forster
Director of Operations
$337,724
$269,309 from orgNo related comp$68,415 other
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Revisions to this profile

January 25, 2026:
2024 American Registry for Internet Numbers Ltd. 990 published
January 25, 2026:
2023 American Registry for Internet Numbers Ltd. 990 published
January 25, 2026:
2022 American Registry for Internet Numbers Ltd. 990 published

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