Mortimer Zuckerman
Profile Summary
Mortimer Zuckerman is a U.S. real-estate billionaire based in New York, born in 1937, with an estimated net worth of ~$2.7 billion RTB. SEC records identify him as an insider filer connected to Boston Properties, Boston Properties Limited Partnership, Neuberger Berman Real Estate Securities Income Fund, Brightcove, and tronc SEC EDGAR.
Business & SEC Activity
SEC EDGAR records list 75 insider filings by Mortimer B. Zuckerman, including filings involving Boston Properties (BXP), a real-estate company SEC EDGAR. His recent filings include Forms 4 and 5, which report insider ownership changes and annual insider transactions, and amended Schedule 13G filings, which update reported beneficial ownership positions SEC EDGAR.
Philanthropy
Three foundations bearing the Zuckerman name reported combined assets of $7,745,542 and grants paid of $751,125 in tax year 2023 ProPublica 990. The Tucson-based Zuckerman Family Foundation reported $6,524,568 in assets and $531,315 in grants; the Glencoe-based Zuckerman Family Foundation reported $1,084,105 in assets and $215,460 in grants; and the Mortimer B. Zuckerman Foundation in New York reported $136,869 in assets and $4,350 in grants ProPublica 990.
Political Activity
Federal Election Commission records show 97 contributions totaling $288,393.47 from February 1978 through May 2016 FEC. The party breakdown was $102,750 to recipients with unknown party affiliation, $100,000 to Republican recipients, $83,043.47 to Democratic recipients, and $2,600 to Independent recipients FEC. His largest listed recipients were the Cantor Victory Fund ($44,800), the National Association of Real Estate Investment Trusts PAC ($37,000), the 7th District Republican Committee ($25,000), Victory Fund ($20,200), and Every Republican Is Crucial (EricPAC) ($15,000) FEC.
These donations are matched to this person by name only, so some may belong to a different person with the same name: FEC filings can include a donor's employer and city, but our matching does not check them against what we know about this person.
U.S. Presence
Philanthropy
Foundations are matched to a person by name, not by trustee records — so a same-surname family foundation can land here in error. Every entity below links to its full IRS filing; if one doesn’t belong, tell us at hello@skylarkcreations.com and we’ll pull it.
Political Contributions
By Party
Every party on file is listed here. The bars are rounded for display; unrounded they total exactly $288,393.47.
Top Recipients
Matched by name only. These donations are matched to this person by name only, so some may belong to a different person with the same name: FEC filings can include a donor's employer and city, but our matching does not check them against what we know about this person.
SEC Filings
Associated Companies
Entities appearing alongside this person in SEC full-text search — an association, not necessarily ownership or control. Follow each link to the primary SEC record to judge for yourself.
Recent Insider Filings
Score Breakdown
The giving score is a weighted average of 2 components. The formula is open and versioned — the weight percentages below show how much each component contributes to the final score.
Evidenced charitable giving — built on what they actually give each year, not parked assets. Dominated by generosity (annual giving relative to net worth — the share of your fortune you give), plus the absolute scale of that giving, plus a small nudge for signing the Giving Pledge (a commitment, not a realized action).
Data: ProPublica 990 charitable disbursements, net worth, The Giving Pledge registry
How much sourced public record we hold about this person — net worth, SEC filings, foundation 990s, news coverage, Wikidata. It measures our coverage, not how open the person is. Each further kind of record scores higher, up to eight. Political donation records matched to a person by name alone are not counted: they may belong to someone else with the same name. From October 7, 2026, our own AI-written summary and the profile photo are not counted either — neither is a public record — so grades that leaned on them moved down that day.
Data: SEC EDGAR, ProPublica 990s, GDELT / NewsAPI, Wikidata
Formula (v2): Giving score = 65% x Philanthropy + 35% x Data coverage
Scored on 10/16/2026 on a 0–100 scale. The score uses only the signals we have populated data for. Goal Impact, Controversy, and Community Approval are deferred until that data exists — Phase 1 goal adoption, controversy detection, and community votes respectively.
All data is sourced from public records. Each section links to its original source.