Marijke Mars
American heiress, billionaire, member of Mars family (Mars Inc.)
Source: Wikidata — retrieved 10/11/2026 (wikidata)Dispute
Profile Summary
A net worth stated in this summary may be out of date.
Marijke Mars is an American heiress and a member of the Mars family associated with Mars Inc. She has an estimated net worth of ~$1.0B. Wikidata
Business & SEC Activity
SEC EDGAR search results identify Kellanova, a Grain Mill Products company, and Acquiror 10VB8, LLC. The Kellanova record contains 1,000 filings, including 791 insider filings; recent entries are Form 4 filings dated December 11–12, 2025. Form 4 is the SEC disclosure used to report an insider’s transactions or changes in ownership of a company’s securities. SEC EDGAR
Philanthropy
Foundation filings list three organizations: Mars Foundation in Monsey, New York; Mars Foundation in Houston, Texas; and Mars Family Foundation Inc. in Franklin, Wisconsin. Their reported combined assets were $4,759,069 and combined grants paid were $1,163,602; the New York Mars Foundation reported $945,543 in grants in 2023, while Mars Family Foundation Inc. reported $218,059. ProPublica 990
Political Activity
FEC records show 7 contributions totaling $3,756 from July 2008 through July 2014. The party breakdown was $2,750 to Democratic recipients and $1,006 categorized as unknown; listed recipients include Obama for America ($2,500), Obama Victory Fund ($1,000), the Democratic National Committee ($250), and ActBlue ($6). 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.
In the News
An August 2026 Observer article examined ownership of Mars and described the company as controlled by descendants of Frank C. Mars across five generations. NewsAPI
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 $3,756.
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. View on Wikidata