Post protects Open Space on the Peninsula and in the south bay for the benefit of all. Post is creating a network of protected lands where people and nature connect and thrive. These lands are preserved forever so present and future generations benefit from the careful... Balance of rural and urban landscapes that make our region extraordinary.

501(c)(3) charity; gifts are tax-deductible.
81¢ of each $1 spent went to programs.
Run by 277 volunteers and 79 employees.
Mission: Form 990 Part I, line 1 · Status: IRS Pub. 78 · Programs: Part IX · People: Part I, lines 5–6

Before you give

FY2025 · Form 990Independent: from IRS data, not the org
Download 990
IRS status
501(c)(3)
not on the IRS revocation list
Looks good: listed by the IRS and not on the revocation list.
IRS BMF · Auto-Revocation List
Tax-deductible gifts
Yes
Donations are tax-deductible
Looks good: the IRS lists gifts to it as deductible.
IRS Pub. 78 · IRS BMF
Latest return
FY2025
latest Form 990
Looks good: the latest return is for FY2025, 1 tax year back; within 2 tax years.
IRS e-file · Filing history
Surplus or deficit
3 of 5
filings with a surplus
Average surplus $7.5M a year · 20% of revenue · last 5 filings
Worth a look: a surplus in 3 of the last 5 filings.
Pt I · Ln 19 · 5 filings
Spent on programs
81%
of spending
Looks good: 81% of spending went to programs; 75% or more.
Pt IX · Ln 25 · col B
Pay to officers and key staff
$2.5M
to officers and key staff · 6% of spending
Looks good: pay to officers and key staff is 6% of spending; 15% or less.
Pt VII · Sec A
<1 mo
of spending, in cash
Plus $175.1M in investments, Pt X · Ln 11–13
Fine: 0.3 months of spending in cash, plus $175.1M in investments.
Pt X · Ln 1–2 · Pt I · Ln 18
Named funders
11
named funders · $148K
Looks good: 11 funders name it on their filings; 3 or more.
Funders’ Sch. I, 990-PF
Liabilities
$14.4M
4% of total assets
Looks good: liabilities are 4% of assets; 50% or less.
Pt X · Ln 26
Independent board members
15
of 15 voting members
Looks good: 15 of 15 voting members are independent, a majority.
Pt VI · Ln 1a–1b
Looks goodFineWorth a lookConcernNo data yetTap a box for the reason.
Revenue
$62.3M
+105% vs prior year
Spent
$43.4M
To programs
81%
Net assets
$359.3M
By yearFY2021–FY2025
Revenue
$62.3M
FY2025▲ +105%
Tap a bar for its year
Revenue by fiscal year
FY2021$38.7M
FY2022$30.2M
FY2023$24.8M
FY2024$30.3M
FY2025$62.3M
Expenses
$43.4M
FY2025▲ +28%
Tap a bar for its year
Expenses by fiscal year
FY2021$23.3M
FY2022$19.3M
FY2023$29.0M
FY2024$33.9M
FY2025$43.4M
Net assets
$359.3M
FY2025▲ +9%
Tap a bar for its year
Net assets by fiscal year
FY2021$329.1M
FY2022$311.7M
FY2023$317.7M
FY2024$328.2M
FY2025$359.3M

From the FY2025 Form 990 (year ending June 2025) · figures checked against the IRS filing · see the original

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Is it real?

Yes. Never revoked by the IRS. Latest filing on record: FY2025. IRS ruling in Apr 1977.

IRS Pub. 78 · IRS Auto-Revocation List · IRS Business Master File

Where the money goes

81 cents of each dollar spent went to programs.

Program services 81% · $35.1M Management & general 9% · $4.1M Fundraising 10% · $4.2M

Form 990 Part IX, line 25, columns B–D. Every line is in By the numbers.

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Who runs it and what they're paid

28 people listed on the 990; $2.5M paid to officers and key staff.

Part VII, Section A · reportable compensation · most recent filed roster (FY2024); the FY2025 filing did not itemize Part VII
$395,344Pt VII · Sec A
Treasurer & CFO/COO
$305,729Pt VII · Sec A
Vice President of Development
$286,071Pt VII · Sec A
Vice President of Conservation
$267,932Pt VII · Sec A
Chief Marketing Officer (through Sept)
$253,981Pt VII · Sec A
Chief Talent Officer
$233,975Pt VII · Sec A
Director of Finance
$216,799Pt VII · Sec A
General Counsel
$207,835Pt VII · Sec A

Walter T Moore’s $395K as President is at the 81st percentile of top reported officer pay among 324 $10–100M environment nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.

Compensation history total reportable pay by year · 8 named individuals · Part VII

NameFY2025FY2024FY2023FY2022FY2021
Walter T Moore$395,344$397,326$367,707$359,152$351,751
Mark Stevens$305,729$293,584$282,550$274,335$256,692
Gordon Clark$286,071$256,194$236,409$220,522$201,791
Curtis Riffle————$268,895
Noelle Chambers$267,932$249,961$229,416$207,883$166,980
Martha Tedesco$253,981$254,724$237,946$228,732$213,570
Diane Cordova$233,975$229,672$218,399$203,186$194,053
Justin Eliot$216,799$206,925$198,578$192,257$181,219

Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.

See Peninsula Open Space Trust executive salaries →

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Questions the 990 asks

The form asks each of these directly. These are the filed answers.

  • Family or business ties among officersPt VI · Ln 2No
  • Top official's pay set by an independent reviewPt VI · Ln 15aYes

Programs and updates

Preserves open land on the Peninsula and in the South Bay for everyone's enjoyment.

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Provided by the organization

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3 programs · $35.1M · in their own filed words · FY2024
01

Land Acquisition & Transfer

In fiscal year 2025, post completed and assisted a total of 9 transactions that protected 5,538 acres. Purchased 2,467 acres of sargent ranch in southern santa clara county, a key wildlife linkage and part of the juristac tribal cultural landscape.

$21.1Mprogram expense
02

Land Management

Post currently holds 18,444 acres in fee ownership and holds conservation easements and deed restrictions on 15,024 acres. The organization has an established stewardship program for the lands it owns that includes resource conservation planning and management, along with active uses of land for conservation grazing and agriculture…

$10.7Mprogram expense
03

Community Outreach and Education

Post continued our community growth and engagement efforts in fiscal year 2025 growing the list of community members by 36.4k new contacts. These contacts were gathered via content, general awareness paid advertising, social media, and events. Post's community database now includes 146k community members.

$3.4Mprogram expense

Funders

Who pays for it.

From grant filings on record. Receipts are incomplete: individual donors are never listed.

Grants

Schedule I · received and paid
Grants received · FY2025
See all 11 funders →
Grants paid · 82 grants · $22.2M · 2020–2024
County of San Mateo Parks DepartmentFY2024$5,265,188
Climate Resilient CommunitiesCA · FY2024$185,000
Santa Clara Valley Open Space AuthorityFY2024$100,000
Unitemized GrantFY2024$84,000
San Mateo Resource Conservation DistrictFY2024$80,000
Amah Mutsun Land TrustCA · FY2024$50,000
Together Bay AreaCA · FY2024$35,000
Santa Clara Valley Habitat AgencyFY2024$25,000
University of California DavisFY2024$15,000
Saved by NatureCA · FY2024$13,000
CanopyCA · FY2024$10,500
Coastal QuestCA · FY2024$10,000
Puente De La Costa SurCA · FY2024$10,000
Sempervirens FundCA · FY2024$10,000
See all 82 grants →

By the numbers

The FY2025 990, line by line.

1The main four
Money inPt VIII
$62.3M
Ln 12
Gifts and grantsLn 1h$54.8M
Investment incomeLn 3$6.8M
Other incomeLn 4–11$430K
Money outPt IX
$43.4M
Ln 25
Programscol B$35.1M
Managementcol C$4.1M
Fundraisingcol D$4.2M
Owns and owesPt X
$359.3M
net assets · Ln 32
Cash and savingsLn 1–2$1.1M
Total assetsLn 16$373.8M
LiabilitiesLn 26$14.4M
PeoplePt VI, VII
28
listed · VII A
PaidVII A10
Voting boardVI 1a15
IndependentVI 1b15
2In more detail
Revenue in detailPt VIII
Gifts and grantsLn 1h$54.8M
Government grantsLn 1e$1.4M
Noncash giftsLn 1g$32.8M
Fees for servicesLn 2g$250K
Investment incomeLn 3$6.8M
Other incomeLn 4–11$430K
Gains on assetsLn 7$1.4M
Total revenueLn 12$62.3M
Assets in detailPt X, end of year
CashLn 1$0
SavingsLn 2$1.1M
Cash and savings togetherLn 1–2$1.1M
InvestmentsLn 11–13$175.1M
Land, buildings, equipmentLn 10c$6.3M
Other assetsLn 15$179.8M
Total assetsLn 16$373.8M
LiabilitiesLn 26$14.4M
Net assetsLn 32$359.3M
OperationsPt I, VI
EmployeesI 579
VolunteersI 6277
Fiscal year endsHeaderJune
Conflict-of-interest policyVI 12aYes
Whistleblower policyVI 13Yes
Records policyVI 14Yes
3Year over year
Balance sheet, start vs end of yearPt X · col A, B
LineStart FY25End FY25
Cash and savingsLn 1–2$1.6M$1.1M
InvestmentsLn 11–13$185.8M$175.1M
Land, buildings, equipmentLn 10c$6.5M$6.3M
Total assetsLn 16$339.3M$373.8M
LiabilitiesLn 26$11.1M$14.4M
Net assetsLn 32$328.2M$359.3M
4Every line
Statement of functional expensesPt IX · every line
LineTotalProgramsManagementFundraising
Grants to domestic organizationsLn 1$9.1M$9.1M
Grants to domestic individualsLn 2$89K$89K
Pay of current officers, directors and key staffLn 5$1.7M$718K$578K$424K
Other salaries and wagesLn 7$7.8M$4.4M$1.5M$1.8M
Pension plan contributionsLn 8$656K$350K$156K$150K
Other employee benefitsLn 9$1.0M$565K$235K$248K
Payroll taxesLn 10$665K$356K$152K$156K
Legal feesLn 11b$932K$840K$92K
Accounting feesLn 11c$50K$50K
Lobbying feesLn 11d$958K$958K
Investment management feesLn 11f$349K$349K
Other fees for servicesLn 11g$3.5M$2.7M$261K$600K
Advertising and promotionLn 12$670K$619K$51K
Office expensesLn 13$413K$171K$46K$196K
Information technologyLn 14$538K$297K$88K$154K
OccupancyLn 16$1K$1K
TravelLn 17$50K$31K$12K$6K
Conferences, conventions and meetingsLn 19$229K$127K$54K$47K
InterestLn 20$82K$7K$74K
Depreciation, depletion and amortizationLn 22$281K$163K$53K$65K
InsuranceLn 23$323K$247K$76K
Other expenses (24a–d)Ln 24$13.5M$13.1M$199K$187K
All other expensesLn 24e$454K$325K$43K$87K
Total functional expensesLn 25$43.4M$35.1M$4.1M$4.2M

Filing history

YearMoney inMoney outIn minus outNet assetsDownload
FY2025 Latest Viewing $62.3M$43.4M$18.8M$359.3M 990 PDF
FY2024 $30.3M$33.9M−$3.6M$328.2M 990 PDF
FY2023 $24.8M$29.0M−$4.3M$317.7M 990 PDF
FY2022 $30.2M$19.3M$10.9M$311.7M 990 PDF
FY2021 $38.7M$23.3M$15.4M$329.1M 990 PDF

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Schedules filed Part IV

III · Programs R · Related orgs G · Fundraising L · Interested persons I · Grants A · Public support M · Noncash J · Pay O · Explanations
See the full FY2025 990 (6 parts)
Part I · Summary $62,253,306 revenue, 12 lines filed
I-8 Contributions and grantsPrior year $24,688,844$54,755,631
I-9 Program service revenuePrior year $422,941$249,798
I-10 Investment incomePrior year $4,843,028$6,818,019
I-11 Other revenuePrior year $353,823$429,858
I-12 Total revenuePrior year $30,308,636$62,253,306
I-13 Grants and similar amounts paidPrior year $10,247,709$9,209,125
I-14 Benefits paid to membersPrior year $0$0
I-15 Salaries and benefitsPrior year $10,790,434$11,841,364
I-16a Professional fundraising feesPrior year $239,273$0
I-17 Other expensesPrior year $12,582,112$22,354,696
I-18 Total expensesPrior year $33,859,528$43,405,185
I-19 Revenue less expensesPrior year −$3,550,892$18,848,121
Part VI · Governance 15 of 15 board members independent, no flags
VI-1a Voting members of the governing body15
VI-1b Independent voting members15
VI-2 Family or business relationship among officers or directorsNo
VI-12a Written conflict of interest policyYes
VI-13 Written whistleblower policyYes
VI-14 Document retention and destruction policyYes
VI-15a Process for setting top official's payYes
Part VIII · Statement of revenue $62,253,306 across 9 lines filed
VIII-1e Government grants$1,381,922
VIII-1f All other contributions, gifts and grants$53,373,709
VIII-1g Noncash contributions (included above)$32,849,735
VIII-1h Total contributions, gifts and grants$54,755,631
VIII-2a-f Program service revenue, itemized rows (sum of 2a–2f as filed)Related to mission $249,798$249,798
VIII-3 Investment incomeExcluded from tax $5,452,696$5,452,696
VIII-7 Net gain or loss on sales of assetsExcluded from tax $1,365,323$1,365,323
VIII-11a-d Other revenue, itemized rows (sum of 11a–11d as filed)Excluded from tax $429,858$429,858
VIII-12 Total revenueRelated to mission $249,798 · Unrelated business $0 · Excluded from tax $7,247,877$62,253,306
Part IX · Statement of functional expenses $43,405,185 across 23 lines filed
IX-1 Grants to domestic organizationsPrograms $9,120,125$9,120,125
IX-2 Grants to domestic individualsPrograms $89,000$89,000
IX-5 Pay of current officers, directors and key staffPrograms $718,229 · Management $577,784 · Fundraising $423,945$1,719,958
IX-7 Other salaries and wagesPrograms $4,385,620 · Management $1,545,387 · Fundraising $1,821,872$7,752,879
IX-8 Pension plan contributionsPrograms $350,331 · Management $155,857 · Fundraising $149,836$656,024
IX-9 Other employee benefitsPrograms $564,527 · Management $234,988 · Fundraising $248,406$1,047,921
IX-10 Payroll taxesPrograms $356,146 · Management $152,071 · Fundraising $156,365$664,582
IX-11b Legal feesPrograms $839,876 · Management $92,119$931,995
IX-11c Accounting feesManagement $49,505$49,505
IX-11d Lobbying feesPrograms $958,000$958,000
IX-11f Investment management feesManagement $349,420$349,420
IX-11g Other fees for servicesPrograms $2,674,020 · Management $261,255 · Fundraising $600,239$3,535,514
IX-12 Advertising and promotionPrograms $619,043 · Fundraising $50,863$669,906
IX-13 Office expensesPrograms $170,849 · Management $46,296 · Fundraising $196,328$413,473
IX-14 Information technologyPrograms $296,770 · Management $87,563 · Fundraising $153,552$537,885
IX-16 OccupancyPrograms $1,000$1,000
IX-17 TravelPrograms $31,226 · Management $12,275 · Fundraising $6,392$49,893
IX-19 Conferences, conventions and meetingsPrograms $127,142 · Management $54,378 · Fundraising $47,352$228,872
IX-20 InterestPrograms $7,494 · Management $74,308$81,802
IX-22 Depreciation, depletion and amortizationPrograms $162,878 · Management $53,301 · Fundraising $65,118$281,297
IX-23 InsurancePrograms $247,373 · Management $75,605$322,978
IX-24 Other expenses (24a–d)Programs $13,102,700 · Management $198,858 · Fundraising $187,386$13,488,944
IX-24e All other expensesPrograms $324,609 · Management $42,868 · Fundraising $86,735$454,212
IX-25 Total functional expensesPrograms $35,146,958 · Management $4,063,838 · Fundraising $4,194,389$43,405,185
Part X · Balance sheet $373,765,719 assets, 18 lines filed
Asset lines not itemized here account for $2,240,205; see the IRS return.
X-1 Cash, non-interest-bearingStart of year $26,458$0
X-2 Savings and temporary cash investmentsStart of year $1,614,218$1,061,515
X-3 Pledges and grants receivableStart of year $5,046,514$8,379,423
X-4 Accounts receivableStart of year $1,068,677$646,089
X-9 Prepaid expenses and deferred chargesStart of year $300,782$258,371
X-10c Land, buildings and equipment, netStart of year $6,510,021$6,260,934
X-11 Publicly traded securitiesStart of year $179,008,192$167,519,558
X-12 Other securitiesStart of year $6,782,534$7,566,072
X-15 Other assetsStart of year $136,674,679$179,833,552
X-16 Total assetsStart of year $339,333,871$373,765,719
X-17 Accounts payable and accrued expensesStart of year $3,584,305$4,224,981
X-19 Deferred revenueStart of year $2,826,200$966,155
X-25 Other liabilitiesStart of year $4,627,374$6,263,043
X-26 Total liabilitiesStart of year $11,139,198$14,434,992
X-27 Net assets without donor restrictionsStart of year $311,524,699$340,525,239
X-28 Net assets with donor restrictionsStart of year $16,669,974$18,805,488
X-32 Total net assets or fund balancesStart of year $328,194,673$359,330,727
X-33 Total liabilities and net assetsStart of year $339,333,871$373,765,719
Part XI · Reconciliation of net assets $359,330,727 net assets at year end
XI-1 Total revenue$62,253,306
XI-2 Total expenses$43,405,185
XI-3 Revenue less expenses$18,848,121
XI-4 Net assets at start of year$328,194,673
XI-5 Net unrealized gains (losses) on investments$12,287,933
XI-9 Other changes in net assets$0
XI-10 Net assets at end of year$359,330,727

Form 990 e-file (XML) FY2025 from the IRS · Classification, formation year and address from the IRS Business Master File

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