Camber Capital Management LP In its 13F for Q1 2024 (holdings as of March 31, 2024, filed May 15, 2024), Camber Capital Management LP reported 33 stock positions worth $2.8 billion . Its top holding was Zimmer Biomet (ZBH) at 9.0% of the portfolio, followed by Universal Health Services-B (UHS, 8.0% ) and Baxter International (BAX, 7.5% ). Compared with Q4 2023, it opened 5 new positions, sold out of 7, added to 6 and reduced 7. The biggest buy was a new position in Biogen (BIIB) and the biggest sale Tenet Healthcare (THC, shares −49% ).
Location BOSTON, MA
CIK 0001444043
Portfolio Value $2.8B (Q1 2024) Holdings 33 stocks · $2.8B Holdings quarter Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q4 2023 ZBH Zimmer Biomet Holdings Inc. 1,925,000 $254.1M No change UHS Universal Health Services-B 1,250,000 $228.1M Reduce -33.2% BAX Baxter International Inc. 5,000,000 $213.7M No change THC Tenet Healthcare Corp. 1,900,000 $199.7M Reduce -49.3% VTRS Viatris Inc. 16,250,000 $194.0M Reduce -12.2% WBA Walgreens Boots Alliance Inc. 7,800,000 $169.2M Add +11.4% MYGN Myriad Genetics Inc. 7,635,000 $162.8M No change MDT Medtronic PLC 1,850,000 $161.2M No change JAZZ Jazz Pharmaceuticals PLC 1,150,000 $138.5M Add +70.4% GMED Globus Medical Inc. Class A 2,500,000 $134.1M Add +11.1% PTCT PTC Therapeutics Inc. 4,000,000 $116.4M No change SEM Select Medical Holdings Corp. 3,400,000 $102.5M No change BKD Brookdale Senior Living Inc. 15,500,000 $102.5M No change GSK GSK PLC-Spon ADR 2,175,000 $93.2M No change BIIB Biogen Inc. 400,000 $86.3M New SRPT Sarepta Therapeutics Inc. 585,000 $75.7M Reduce -26.9% ZIMV Zimvie Inc. 3,250,000 $53.6M No change QGEN Qiagen NV 1,210,000 $52.0M Add +102.8% PRGO Perrigo Co. PLC 1,520,000 $48.9M Reduce -17.8% COLL Collegium Pharmaceutical Inc. 852,900 $33.1M Reduce -18.8% DNLI Denali Therapeutics Inc. 1,500,000 $30.8M New HLF Herbalife Ltd. 3,000,000 $30.1M Add +50.0% OSUR Orasure Technologies Inc. 4,250,000 $26.1M No change REPL Replimune Group Inc. 2,750,000 $22.5M Add +175.0% BMRN Biomarin Pharmaceutical Inc. 250,000 $21.8M New PTON Peloton Interactive Inc. Class A 4,500,000 $19.3M No change INGN Inogen Inc. 2,000,000 $16.1M No change SKIN Skinhealth Systems Inc. filed as THE BEAUTY HEALTH COMPANY 3,500,000 $15.5M No change BCYC Bicycle Therapeutics PLC-ADR 450,000 $11.2M No change TBPH Theravance Biopharma Inc. 1,000,000 $9.0M New PBYI Puma Biotechnology Inc. 1,650,000 $8.7M Reduce -41.2% CVAC Curevac NV 1,750,000 $5.3M No change GMAB Genmab A/S -SP ADR 50,000 $1.5M New
Options reported separately and not counted above: SPY puts ($1.2B), PFE calls ($69.4M).
Other holdings (1): bonds, preferreds, convertibles and warrants · $22.7M (not counted above) Total filed on the 13F, all lines: $2.9B.
Portfolio Sells Q4 2023 → Q1 2024 Portfolio Sells quarter Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2023 % Of Portfolio Change To Portfolio ▲ THC Tenet Healthcare Corp. Reduce -49.3% 7.04% −2.93 UHS Universal Health Services-B Reduce -33.2% 8.04% −2.00 IONS Ionis Pharmaceuticals Inc. Sold out 0.00% −1.54 RARE Ultragenyx Pharmaceutical Inc. Sold out 0.00% −1.52 QDEL Quidelortho Corp. Sold out 0.00% −1.04 MRNA Moderna Inc. Sold out 0.00% −0.88 HRMY Harmony Biosciences Holdings Sold out 0.00% −0.85 ASND Ascendis Pharma A/S Sold out 0.00% −0.73 PRGO Perrigo Co. PLC Reduce -17.8% 1.72% −0.37 SLDB Solid Biosciences Inc. Sold out 0.00% −0.31 VTRS Viatris Inc. Reduce -12.2% 6.84% −0.22 PBYI Puma Biotechnology Inc. Reduce -41.2% 0.31% −0.12 SRPT Sarepta Therapeutics Inc. Reduce -26.9% 2.67% −0.05 COLL Collegium Pharmaceutical Inc. Reduce -18.8% 1.17% +0.03
Portfolio Buys Q4 2023 → Q1 2024 Portfolio Buys quarter Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2023 % Of Portfolio Change To Portfolio ▼ BIIB Biogen Inc. New 3.04% +3.04 JAZZ Jazz Pharmaceuticals PLC Add +70.4% 4.88% +1.96 DNLI Denali Therapeutics Inc. New 1.08% +1.08 QGEN Qiagen NV Add +102.8% 1.83% +0.89 BMRN Biomarin Pharmaceutical Inc. New 0.77% +0.77 GMED Globus Medical Inc. Class A Add +11.1% 4.73% +0.50 REPL Replimune Group Inc. Add +175.0% 0.79% +0.49 TBPH Theravance Biopharma Inc. New 0.32% +0.32 GMAB Genmab A/S -SP ADR New 0.05% +0.05 HLF Herbalife Ltd. Add +50.0% 1.06% −0.01 WBA Walgreens Boots Alliance Inc. Add +11.4% 5.96% −0.47
Options Activity Q4 2023 → Q1 2024 Security Type Change vs Q4 2023 Underlying Shares Value ▼ SPY SS SPDR S&P 500 ETF Trust-US put Add +10.0% 2,200,000 $1.2B PFE Pfizer Inc. call Reduce -36.2% 2,500,000 $69.4M
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2025 23 $717.9M ZBH, BAX, HUM, CVS, GMED Q1 2025 28 $1.6B ZBH, BAX, HUM, CVS, GMED Q4 2024 35 $2.5B MDT, VTRS, ZBH, HUM, PTCT Q3 2024 31 $2.6B ZBH, MDT, BAX, VTRS, GMED Q2 2024 34 $2.6B ZBH, BAX, MDT, UHS, GMED Q1 2024 33 $2.8B ZBH, UHS, BAX, THC, VTRS