Seth Klarman - Baupost Group
As of Q2 2026, Seth Klarman reported 23 long-equity positions worth $5.42B in aggregate.
Copy-investor backtest
- Latest quarter
- +3.22%
- 1-year
- +20.94%
- 3-year
- +48.31%
- 5-year
- +12.01%
- 3-year vs S&P 500
- -25.70%
- 5-year vs S&P 500
- -61.90%
- 5-year top 5
- -0.29%
Return from mechanically copying the disclosed 13F equity portfolio after each filing and rebalancing at the next. The vs S&P 500 figures subtract SPY over that manager's own rebalance dates, so both sides cover the same days; both are price return, excluding dividends. Method & limitations.
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Updated 2026-06-06 from SEC 13F data.
Live quotes available for 6 of 25 rows. Rows without a quote are marked unavailable.
| 1 | MU | MICRON TECHNOLOGY INC | 27.72% | - | 51,655,434 | $1.7B | $32.95 | No quote |
| 2 | IDIX | IDENIX PHARMACEUTICALS INC | 20.67% | - | 53,331,109 | $1.27B | No quote | No quote |
| 3 | VSAT | VIASAT INC | 10.89% | Add +1.2% | 11,533,137 | $668.46M | $57.96 | No quote |
| 4 | THRX | THERAVANCE INC | 9.89% | Reduce -1.5% | 20,395,056 | $607.37M | No quote | No quote |
| 5 | LNG | CHENIERE ENERGY INC | 6.99% | Add +5.8% | 5,987,930 | $429.34M | No quote | No quote |
| 6 | EBAY | EBAY INC | 3.62% | New | 4,436,300 | $222.08M | $50.06 | No quote |
| 7 | TBPH | THERAVANCE BIOPHARMA INC | 3.15% | New | 6,061,228 | $193.23M | No quote | No quote |
| 8 | KERX | KERYX BIOPHARMACEUTICALS INC | 2.64% | Add +67.0% | 10,539,986 | $162.11M | No quote | No quote |
| 9 | PBF | PBF ENERGY INC | 2.43% | Add +3.3% | 5,595,286 | $149.11M | $26.65 | No quote |
| 10 | RFMD | RF MICRODEVICES INC | 1.52% | Add +48.2% | 9,759,185 | $93.59M | No quote | No quote |
| 11 | TQNT | TRINQUINT SEMICONDUCTOR INC | 1.51% | Add +53.7% | 5,880,696 | $92.97M | No quote | No quote |
| 12 | NG | NOVAGOLD RES INC | 1.49% | - | 21,688,300 | $91.31M | $4.21 | No quote |
| 13 | IMOS | CHIPMOS TECH BERMUDA LTD | 1.29% | - | 3,283,235 | $79.22M | No quote | No quote |
| 14 | CWSA | CITIGROUP INC | 1.22% | Add +17.6% | 122,573,007 | $74.76M | No quote | No quote |
| 15 | SEMI | SUNEDISON SEMICONDUCTOR LTD | 1.14% | New | 4,145,379 | $70.18M | No quote | No quote |
| 16 | KOS | KOSMOS ENERGY LTD | 0.87% | New | 4,750,000 | $53.34M | No quote | No quote |
| 17 | KIN | KINDRED BIOSCIENCES INC | 0.84% | - | 2,763,848 | $51.52M | No quote | No quote |
| 18 | ELOS | SYNERON MEDICAL LTD | 0.67% | - | 4,000,000 | $41.28M | No quote | No quote |
| 19 | BYD | BOYD GAMING CORP | 0.55% | New | 2,794,630 | $33.9M | $12.13 | No quote |
| 20 | AIGWS | AMERICAN INTL GROUP INC | 0.34% | Add +20.2% | 788,998 | $20.99M | No quote | No quote |
| 21 | AOI | ALLIANCE ONE INTL INC | 0.26% | - | 6,383,641 | $15.96M | No quote | No quote |
| 22 | AVEO | AVEO PHARMACEUTICALS INC | 0.11% | - | 3,829,350 | $7.01M | No quote | No quote |
| 23 | ALDW | ALON USA PARTNERS LP | 0.10% | - | 329,188 | $5.9M | No quote | No quote |
| 24 | NCQ | NOVACOPPER INC | 0.09% | - | 5,005,298 | $5.46M | No quote | No quote |
| 25 | BP | BP PLC | - | Sold | 0 | $0 | No quote | No quote |