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Seth Klarman
MassachusettsFinanceGiving Pledge
A
77.8
PBS
~$1.5B
Profile Summary
Seth Klarman is a U.S. finance investor born in 1957 and associated with Baupost Group. His estimated net worth is ~$1.5B. RTB Recent reporting describes Baupost as an investment firm that holds positions in public companies and other asset managers. NewsAPI
Business & SEC Activity
SEC records identify Baupost Group LLC/MA and show 137 electronic filing-system hits connected with the records returned. The data also lists 994 filings for Keryx Biopharmaceuticals, including 499 insider filings; Form 4 filings generally disclose transactions by company insiders. SEC EDGAR A recent report said Baupost bought nearly $13 million of Pershing Square, established a nearly $137 million position in CME Group, and increased its Amazon and Alphabet holdings. NewsAPI
Philanthropy
The Klarman Family Foundation reported $74.4 million in total assets, $72.5 million in revenue, $109.5 million in expenses, and $96.1 million in grants paid for tax year 2023. ProPublica 990 Klarman is listed as a signatory to The Giving Pledge. Giving Pledge
Political Activity
The available FEC data covers only the most recent 100 contributions and indicates at least 100 federal contributions, totaling $893,100 in that sample. Of that sample, $878,100 went to Democratic recipients and $15,000 had no party classification; the largest listed recipients were the DCCC and DSCC, each receiving $250,000. FEC
In the News
A recent report said Baupost had exited its Vaxcyte position by the time some investors followed the trade in May. NewsAPI Other recent coverage described new and expanded Baupost positions in Pershing Square, CME Group, Amazon, and Alphabet. NewsAPI
U.S. Presence
residenceChestnut Hill, Massachusetts
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.
$744.0MFoundation Assets
$96.1MGrants Paid
1Foundation
Klarman Family FoundationBoston, MA
Private grantmaking foundation (IRS NTEE T20)
Assets: $744.0MRevenue: $72.5MGrants: $96.1MTax Year: 2023
Mission, purpose & full 990 filings → ProPublica Nonprofit ExplorerPolitical Contributions
$893K+In Records We Hold
100+Contributions
2025–2026Range Shown
These figures cover the 100 most recent federal contributions on file, not the full record. The total, party split, top recipients and dates below are all computed over that sample, so each is a floor rather than a complete figure.
By Party (in the sample)
Top Recipients (in the sample)
DCCC$250K
DSCC$250K
DEMOCRATIC PARTY OF WISCONSIN FEDERAL$10K
TEXAS DEMOCRATIC PARTY$10K
OHIO DEMOCRATIC PARTY - FEDERAL$10K
Matched by name only. These are the donations the FEC lists under this person’s name — so a different person with the same name can show up here too.
SEC Filings
994Total Filings
499Insider Filings
137EDGAR Mentions
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
4FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/20184FORM 4 SUBMISSION
12/13/2018News Coverage
Coverage window: 2026-08-14 to 2026-08-14 · retrieved 8/22/2026
Score Breakdown
A
77.8
Public Benefit Score
The PBS 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.
Philanthropy65% weight
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
Transparency35% weight
How much sourced, public accountability data exists — net worth, political contributions, SEC filings, foundation 990s, news coverage, and a verified profile. More public disclosure scores higher.
Data: FEC, SEC EDGAR, ProPublica 990s, GDELT / NewsAPI, Wikidata
Formula (v2): PBS = 65% x Philanthropy + 35% x Transparency
Scored on 8/31/2026 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.