Compensation 990

Open Space Institute Inc.

Fiscal year ending 2024. Filed on November 7, 2025.

1370 Broadway 5th Floor
New York, New York 10018

Open Space Institute Inc. (EIN: 52-1053406) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2024 IRS Form 990 filing, Open Space Institute Inc., a 501(c)(3) charitable organization, reported compensation for 24 out of 86 total employees. Among the employees shown here, the average compensation is $270,740. The highest compensated employee at Open Space Institute Inc. is Tally Blumberg with fiscal year 2024 compensation of $403,844.

Revenue, expenses, and employee compensation

Revenue

$6,858,272

Expenses

$3,655,960

Employee compensation

$1,469,495
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

Tally Blumberg
Executive Vice President
$403,844
$353,363 from orgNo related comp$50,481 other
Lars Kulleseid
President and CEO (Incoming 04/24)
$390,754
$354,094 from orgNo related comp$36,660 other
Nathan Berry
Chief LAND, Protection Officer
$383,415
$357,268 from orgNo related comp$26,147 other
Eileen Larabee
Chief External Affairs Officer
$364,219
$312,955 from orgNo related comp$51,264 other
Christopher J Elliman
President and CEO (Outgoing 05/24)
$346,723
$317,173 from orgNo related comp$29,550 other
Lesley Kane Szynal
Director of Outdoors America
$330,451
$318,451 from orgNo related comp$12,000 other
Samayla Deutch
Senior Vice President and General Counsel
$307,448
$270,153 from orgNo related comp$37,295 other
Alice Gleason
Senior Vice President for Finance and CFO
$291,935
$264,789 from orgNo related comp$27,146 other
Kathleen Moser
Chief Conservation/Policy
$288,027
$276,027 from orgNo related comp$12,000 other
Robert K Anderberg
Senior Vice President and General Counsel
$286,207
$248,235 from orgNo related comp$37,972 other
Jeffrey Lejava
Vice President and Associate GEN Counsel
$276,779
$229,264 from orgNo related comp$47,515 other
Jennie Greer
Senior Vice President of Philanthropy
$265,605
$222,219 from orgNo related comp$43,386 other

Non-Employee Board Members

Amelia Salzman
Co-Chairperson of the Board
Anson Frelinghuysen
Member
Carol Ash
Vice-Chairperson of the Board
Carolyn Niemczyk
Member
Dale S Bryk
Member
Douglas Bateson
Member
Elizabeth Borden
Member
Gigi Mortimer
Member
Giorgios Vlamis
Member
Holly Hegener
Member
Hume R Steyer
Secretary
John Ernst
Member

Contractors

Cutting Edge Group LLC
Construction
$562,672
Morgan Lewis & Bockius LLP
Legal
$529,789
Alan Front
Consulting
$180,000
Bobby Cox
Construction
$139,207
Susan Blickstein
Consulting
$102,230

Mission Statement

OSI PROTECTS LAND FOR CLEAN DRINKING WATER, PUBLIC RECREATION, HEALTHY COMMUNITIES, AND WILDLIFE HABITAT; AND TO CONSERVE INTACT FORESTS AND FLOODPLAINS THAT CAPTURE AND STORE CARBON AND PROTECT AGAINST INCREASINGLY DANGEROUS WEATHER EVENTS.

Other organizations also named Open Space Institute

Open Space Institute Land Trust Inc.
New York, New York

Revisions to this organization profile

November 7, 2025:
2024 Open Space Institute Inc. 990 filed
November 1, 2024:
2023 Open Space Institute Inc. 990 filed
November 10, 2023:
2022 Open Space Institute Inc. 990 filed

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