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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 Commonlit Inc. Susanna S Kosonen

Susanna S Kosonen

Highest compensated employee

Senior Software Engineer at Commonlit Inc.

Fiscal year ended December 31, 2022. Published on January 25, 2026.

$141,606

2022

Total compensation

Susanna S Kosonen has been listed as an employee of Commonlit Inc. in Form 990 filings since fiscal year 2022.

Annual compensation details

$141,606

Senior Software Engineer

2022

$136k org

40 hrs/wk

$6k other

--

Total compensation by year

Compare the compensation of Susanna S Kosonen to:

2022

Other employees at Commonlit Inc.

President and Chief Executive Officer

$241,782 from orgNo related comp$11,109 other

Geoffrey Harcourt

Chief Technology Officer

$250,000 from orgNo related compNo other comp

Sarah Robertson

Chief Product Officer/Secretary

$172,763 from orgNo related comp$11,045 other

Eliza Aierstuck

Senior Software Engineer - Manager

$174,552 from orgNo related comp$3,711 other

Robert Fleisher

Chief of Partnerships

$148,543 from orgNo related comp$4,173 other

Agnes Malatinszky

Coo/Treasurer (END OCT 22)

$148,688 from orgNo related compNo other comp

Chief Academic Officer

$144,883 from orgNo related compNo other comp

$124,765 from orgNo related comp$11,331 other

Anthony Paul Viviani

$87,201 from orgNo related comp$3,680 other

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Revisions to this profile

January 25, 2026:

2022 Commonlit Inc. 990 published

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