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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 Ottawa Regional Hospital & Healthcare Center Thomas G Hammerton

Thomas G Hammerton

Officer

President OSF Healthcare Foundation and Chief Development Officer at Ottawa Regional Hospital & Healthcare Center

Fiscal year ended September 30, 2024. Published on January 25, 2026.

$742,547
2024

Total compensation

Thomas G Hammerton has been listed as an employee of Ottawa Regional Hospital & Healthcare Center in Form 990 filings since fiscal year 2017. Total compensation for Thomas G Hammerton has increased by 60.1% from 2017 to 2024.

Annual compensation details

$742,547
+55.1%
President OSF Healthcare Foundation and Chief Development Officer
2024
$616k related
42 hrs/wk
$127k other
--
$478,733
-25.9%
President OSF Healthcare Foundation Chief Development Officer
2023
$430k related
42 hrs/wk
$50k other
--

Total compensation by year

Compare the compensation of Thomas G Hammerton to:

2024

Other employees at Ottawa Regional Hospital & Healthcare Center

Robert C Sehring
Vice Chairperson Chief Executive Officer
$3,064,020
$0 from org$2,987,377 from related$76,643 other
Michael A Cruz, M.D.
Chief Operating Officer
$1,425,652
$0 from org$1,349,009 from related$76,643 other
Michael M Allen
Chief Financial Officer
$1,376,047
$0 from org$1,205,633 from related$170,414 other
Michelle D Conger
Chief Strategy Officer, OSF Healthcare/ CEO, OSF Oncall Digital Health
$1,207,505
$0 from org$1,055,498 from related$152,007 other
Jeffry M Tillery
President, OSF Medical Group (Through April 2024)
$1,185,950
$0 from org$1,117,994 from related$67,956 other
Carol A Friesen
Chief Executive Officer, Eastern Region
$1,119,198
$0 from org$971,996 from related$147,202 other
James J Mormann
Chief Executive Officer, Integrated Solutions
$1,056,725
$0 from org$980,082 from related$76,643 other
Ralph Velazquez, M.D.
System Chief Medical Officer
$1,041,877
$0 from org$965,234 from related$76,643 other
Robert G Anderson
Chief Executive Officer, Central Region
$990,176
$0 from org$939,288 from related$50,888 other
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Revisions to this profile

January 25, 2026:
2024 Ottawa Regional Hospital & Healthcare Center 990 published
January 25, 2026:
2023 Ottawa Regional Hospital & Healthcare Center 990 published
January 25, 2026:
2022 Ottawa Regional Hospital & Healthcare Center 990 published

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$646,284
+35.3%
President OSF Healthcare Foundation Chief Development Officer
2022
$605k related
42 hrs/wk
$43k other
--
$477,768
-14.9%
President OSF Healthcare Foundation Chief Development Officer
2021
$431k related
43 hrs/wk
$48k other
--
$561,721
+7.9%
President OSF Healthcare Foundation Chief Development Officer
2020
$496k related
43 hrs/wk
$67k other
--
$520,488
+27.2%
President OSF Healthcare Foundation Chief Development Officer
2019
$461k related
43 hrs/wk
$61k other
--
$409,050
-11.8%
President OSF Healthcare Foundation Chief Development Officer
2018
$363k related
47 hrs/wk
$47k other
--
$463,694
President OSF Healthcare Foundation Chief Development Officer
2017
$418k related
47 hrs/wk
$46k other
--

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