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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
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  3. Southeastern Asset (Longleaf)
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  • Portfolio53
  • Performance40Q
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Southeastern Asset

Longleaf
Share
  • Asset Manager · CIK 0000807985
  • Mid-Size Fund

Southeastern Asset runs Longleaf, an asset manager overseeing $2.25B in disclosed equity holdings (SEC CIK 0000807985). The latest portfolio (2025Q4) discloses 53 positions across 10 sectors, with the largest positions in CNX, MAT and IAC. On a mark-to-market basis the tracked portfolio has returned 60.2% since 2016Q1. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.

Track Southeastern's filingsView holdings↓
Portfolio
$2.25B
Positions
53
Quarter
2025Q4
Filings tracked
40
Since filing+60.2%Full performance →
Quarter
2025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q12023Q42023Q32023Q22023Q1

Not enough filing history to compute mark-to-market returns for Southeastern Asset.

We need at least one year of portfolio coverage with priceable positions.

Performance overview

We mark Southeastern Asset (Longleaf)'s disclosed portfolio to current market prices and compare its growth against the S&P 500 (SPY). Southeastern’s portfolio is 60.2% since 2016Q1.

Portfolio growth vs SPY
Rebased to 100 at 2021Q2 · through 2025Q4
Southeastern Asset
+32.9%
SPY
+69.5%
Alpha
-36.7pp
64931211501782021Q22023Q32025Q4
Portfolio line is the GIPS-compliant time-weighted return chain-linked across the manager's quarterly 13F filings — unaffected by capital flows. Quarters with insufficient held-through coverage are skipped, which can briefly flatten the line.
Capital flow per quarter
BuysSellsNet
+$1.51B+$754M$0-$754M-$1.51B'20Q2'20Q3'20Q4'21Q1'21Q2'21Q3'21Q4'22Q1'22Q2'22Q3'22Q4'23Q1'23Q2'23Q3'23Q4'24Q1
Latest · 2024Q1
-$195M
Lifetime buys
$7.47B
Lifetime sells
$11.00B
Portfolio over time
AUMPositions
$0$1.97B$3.93B$5.96B4524'20Q2'22Q1'24Q1
QoQ AUM
+0.1%
16Q lifetime AUM
-35.1%
QoQ positions
-2
16Q lifetime positions
+14
Position concentration
43 positions
Top 1
8%
of book
  • Top 18%$214.8MCNX
  • Top 2-523%$604.7MMAT, FDX, AMG
  • Top 6-1022%$583.4MLYV, FIS, KEL
  • Top 11-2027%$701.0MCNH INDL N V, MGM, RTX
  • Rest19%$498.8MRest of port