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Seth Klarman
MassachusettsFinanceGiving Pledge
A
77.8
PBS
~$1.5B
Profile Summary
Seth Klarman is a Massachusetts-based finance investor born in 1957, with an estimated net worth of ~$1.5B RTB. He is associated with Baupost Group LLC/MA in SEC filings and is identified in recent news as a value investor whose firm has made Amazon a top holding SEC EDGARGDELT. He is also a signatory to The Giving Pledge Giving Pledge.
Business & SEC Activity
SEC data links Klarman to Baupost Group LLC/MA, and the filing record shows 994 total filings tied to the entity, including 499 insider filings SEC EDGAR. In SEC reporting, Form 4 is the standard filing used to report insider transactions such as buys or sales by company insiders SEC EDGAR. Recent filings listed in the data are all Form 4 submissions dated 2018-12-13 SEC EDGAR.
Philanthropy
The Klarman Family Foundation reported $744,037,214 in total assets in tax year 2023 and paid $96,090,690 in grants ProPublica 990. The foundation also reported $72,505,265 in revenue and $109,524,195 in expenses for that year ProPublica 990.
Political Activity
FEC records show 100 contributions totaling $893,100 from 2025-06-22 to 2026-01-16 FEC. The party breakdown shows $878,100 to Democrats and $15,000 listed as unknown, with top recipients including the DCCC and DSCC at $250,000 each FEC.
In the News
Recent coverage describes Baupost making Amazon its top holding and starting new stakes in Aon and Visa GDELT. Other headlines mention Klarman in connection with an AI stock pick and broader value-investing commentary GDELTNewsAPI.
U.S. Presence
residenceChestnut Hill, Massachusetts
Philanthropy
$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
$893KTotal Contributed
100Contributions
2025–2026Date Range
By Party
Top Recipients
DCCC$250K
DSCC$250K
DEMOCRATIC PARTY OF WISCONSIN FEDERAL$10K
TEXAS DEMOCRATIC PARTY$10K
OHIO DEMOCRATIC PARTY - FEDERAL$10K
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
12/13/2018Recent News
24Total Articles
StockStoryTop Source
PositiveAvg. Sentiment
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 6/23/2026 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.