JANA Partners Management, LP
13F filer · CIK 1998597 · New York, NY
Summary
JANA Partners Management, LP reported $1.90B across 10 positions in its 13F for 2026 Q2, filed Aug 14, 2026. The largest holdings are MRCY (25.5%), COO (13.5%), SPY (13.5%). Versus 2026 Q1, leaving options aside, it opened 0 new positions, added to 5, trimmed 4 and sold out of 1.
Reported value$1.90B
Positions10
Report period2026 Q2
FiledAug 14, 2026
New positions0
Added5
Trimmed4
Sold out1
Top 10 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 25.5%Value $484.29MPrice $80.12Shares 3.96M -3.62%Since Jun 30 -34.51%
Weight 13.5%Value $256.90MPrice $56.57Shares 3.58M +0.49%Since Jun 30 -21.11%
Weight 13.5%Value $256.12MPrice $765.61Shares 343K -0.20%Since Jun 30 +2.52%
Weight 12.2%Value $232.94MPrice $43.18Shares 5.39M +7.71%Since Jun 30 +0.00%
Weight 9.4%Value $179.63MPrice $46.02Shares 3.66M -17.44%Since Jun 30 -6.18%
Weight 7.9%Value $149.88MPrice $1740Shares 77K +1.91%Since Jun 30 -10.89%
Weight 6.4%Value $122.27MPrice $13.37Shares 6.75M +24.24%Since Jun 30 -26.21%
Weight 4.6%Value $87.67MPrice $11.54Shares 4.12MSince Jun 30 -45.82%
Weight 4.1%Value $77.94MPrice $129.40Shares 989K -5.09%Since Jun 30 +64.23%
Weight 2.9%Value $54.67MPrice $11.80Shares 6.75M +0.09%Since Jun 30 +45.68%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 25.5% | $484.29M | -34.51% | -3.62% | Trim | |
| 13.5% | $256.90M | -21.11% | +0.49% | Add | |
| 13.5% | $256.12M | +2.52% | -0.20% | Trim | |
| 12.2% | $232.94M | +0.00% | +7.71% | Add | |
| 9.4% | $179.63M | -6.18% | -17.44% | Trim | |
| 7.9% | $149.88M | -10.89% | +1.91% | Add | |
| 6.4% | $122.27M | -26.21% | +24.24% | Add | |
| 4.6% | $87.67M | -45.82% | — | Hold | |
| 4.1% | $77.94M | +64.23% | -5.09% | Trim | |
| 2.9% | $54.67M | +45.68% | +0.09% | Add |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.