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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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Organizations Education Illustrative Mathematics

Illustrative Mathematics

Fiscal year ending 2019. Filed on November 16, 2020.

PO Box 69822
Oro Valley, Arizona 85737

Illustrative Mathematics (EIN: 46-3513958) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2019 IRS Form 990 filing, Illustrative Mathematics, a 501(c)(3) charitable organization, reported compensation for 11 out of 57 total employees. Among the employees shown here, the average compensation is $195,490. The highest compensated employee at Illustrative Mathematics is William McCallum with fiscal year 2019 compensation of $314,631.

Revenue, expenses, and employee compensation

Revenue

$8,346,929

Expenses

$9,092,924

Employee compensation

$6,065,817
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

William McCallum
President/Chairman of the Board
$314,631
$289,791 No related comp$24,840
Lisa O'Masta
Chief Executive Officer
$303,533
$272,758 No related comp$30,775
Kristen Welch
Chief Financial Officer and Vice President
$223,247
$193,706 No related comp$29,541
Kristin Umland
Chief Product OFF, Vice President PROD Strategy
$223,094
$213,225 No related comp$9,869
Karl Nelson
Vice President COO and CTO
$205,230
$176,199 No related comp$29,031
Trisha Thomas
Vice President
$185,038
$157,341 No related comp$27,697
Brendan Shean
Software Enginner
$145,674
$133,744 No related comp$11,930
Eric Connally
Software Enginner
$142,231
$136,860 No related comp$5,371
Kari Fines
Operations Director
$137,967
$132,539 No related comp$5,428
Lakan Cook
Director of IM Certified Partnerships
$136,042
$109,688 No related comp$26,354
Katherine Nowak
Content Development Director
$133,698
$128,698 No related comp$5,000

Benchmark Employee Compensation

Non-Employee Board Members

Barbara Chow
Director
Cynthia Nava
Director
George Zettler
Treasurer and Secretary
Gregg Levin
Director
Heather Hill
Director
Lisa Carmona
Director

Mission Statement

AT ILLUSTRATIVE MATHEMATICS WE ARE COMMITTED TO CREATING A WORLD WHERE ALL LEARNERS KNOW, USE, AND ENJOY MATHEMATICS. WE CRAFT AND DELIVER HIGH-QUALITY EDUCATIONAL RESOURCES FOR TEACHERS AND STUDENTS BY DEVELOPING GREAT PEOPLE WHO WORK IN SPIRITED (CONTINUED ON SCH O) TEAMS TO DO EXTRAORDINARY THINGS.

Revisions to this organization profile

November 6, 2025:
2024 Illustrative Mathematics 990 filed
October 7, 2024:
2023 Illustrative Mathematics 990 filed
October 31, 2023:
2022 Illustrative Mathematics 990 filed

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