13D Management LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), 13D Management LLC reported 18 stock positions worth $104.3 million. Its top holding was Mercury Systems (MRCY) at 10.2% of the portfolio, followed by Qorvo (QRVO, 7.7%) and Viasat (VSAT, 7.5%). Compared with Q2 2025, it opened 4 new positions, sold out of 6 and reduced 5. The biggest buy was a new position in Viasat (VSAT) and the biggest sale an exit from Air Products & Chemicals (APD).
- Most Recent 13F
- Q2 2026
- Location
- New York, NY
- CIK
- 0001600133
- Portfolio Value
- $104.3M (Q3 2025)
- SEC Filing
- 0001172661-25-004791 ↗ filed Nov 14, 2025
Holdings Value
Holdings 18 stocks · $104.3M
| MRCY Mercury Systems Inc. | 10.17% | 137,012 | $10.6M | No change |
| QRVO Qorvo Inc. | 7.75% | 88,740 | $8.1M | No change |
| VSAT Viasat Inc. | 7.50% | 267,000 | $7.8M | New |
| ALV Autoliv Inc. | 6.61% | 55,839 | $6.9M | No change |
| PSO Pearson PLC-Sponsored ADR | 6.22% | 458,338 | $6.5M | No change |
| TWLO Twilio Inc. Class A | 5.83% | 60,755 | $6.1M | No change |
| JHG Janus Henderson Group PLC | 5.75% | 134,654 | $6.0M | No change |
| ABG Asbury Automotive Group | 5.00% | 21,337 | $5.2M | Reduce -21.2% |
| ETSY Etsy Inc. | 4.95% | 77,836 | $5.2M | No change |
| SWX Southwest Gas Holdings Inc. | 4.79% | 63,798 | $5.0M | Reduce -34.1% |
| EXEL Exelixis Inc. | 4.76% | 120,335 | $5.0M | Reduce -16.1% |
| TRIP Tripadvisor Inc. | 4.68% | 300,000 | $4.9M | New |
| BILL Bill Holdings Inc. | 4.57% | 90,000 | $4.8M | New |
| MTCH Match Group Inc. | 4.50% | 132,779 | $4.7M | No change |
| PFGC Performance Food Group Co. | 4.29% | 43,000 | $4.5M | New |
| LW Lamb Weston Holdings Inc. | 4.23% | 76,001 | $4.4M | Reduce -5.7% |
| CRL Charles River Laboratories | 4.20% | 28,000 | $4.4M | No change |
| YETI Yeti Holdings Inc. filed as YETI HLDGS INC | 4.20% | 132,000 | $4.4M | Reduce -19.5% |
Portfolio Sells Q2 2025 → Q3 2025
| APD Air Products & Chemicals Inc. | Sold out | 0.00% | −6.15 |
| RIOT Riot Platforms Inc. | Sold out | 0.00% | −4.67 |
| KVUE Kenvue Inc. | Sold out | 0.00% | −4.49 |
| MIDD Middleby Corp. | Sold out | 0.00% | −3.43 |
| PENN Penn Entertainment Inc. | Sold out | 0.00% | −3.18 |
| VSTS Vestis Corp. | Sold out | 0.00% | −2.93 |
| SWX Southwest Gas Holdings Inc. | Reduce -34.1% | 4.79% | −1.78 |
| EXEL Exelixis Inc. | Reduce -16.1% | 4.76% | −1.00 |
| ABG Asbury Automotive Group | Reduce -21.2% | 5.00% | −0.89 |
| YETI Yeti Holdings Inc. | Reduce -19.5% | 4.20% | −0.52 |
| LW Lamb Weston Holdings Inc. | Reduce -5.7% | 4.23% | +0.42 |
Portfolio Buys Q2 2025 → Q3 2025
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 11 | $71.3M | VSAT, TWLO, MRCY, PSO, ALV |
| Q1 2026 | 13 | $64.5M | TWLO, VSAT, ACHC, PSO, ALV |
| Q4 2025 | 16 | $84.0M | TWLO, MRCY, VSAT, ALV, PSO |
| Q3 2025 | 18 | $104.3M | MRCY, QRVO, VSAT, ALV, PSO |
| Q2 2025 | 20 | $109.6M | TWLO, QRVO, MRCY, SWX, PSO |
| Q1 2025 | 21 | $113.4M | MRCY, PSO, NSIT, APD, SWX |
| Q4 2024 | 21 | $135.0M | TWLO, VSTS, SWX, MRCY, PSO |
| Q3 2024 | 22 | $136.4M | FYBR, NSIT, SWX, EXEL, MDU |
| Q2 2024 | 21 | $137.1M | NSIT, FYBR, SWX, EXEL, TWLO |
| Q1 2024 | 28 | $163.8M | GDDY, SWX, NSIT, FYBR, ELAN |