13D Management LLC
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 17, 2026), 13D Management LLC reported 16 stock positions worth $84.0 million. Its top holding was Twilio Class A (TWLO) at 10.3% of the portfolio, followed by Mercury Systems (MRCY, 9.0%) and Viasat (VSAT, 8.3%). Compared with Q3 2025, it opened 4 new positions, sold out of 6 and reduced 3. The biggest buy was a new position in Workiva (WK) and the biggest sale an exit from Qorvo (QRVO).
- Most Recent 13F
- Q2 2026
- Location
- New York, NY
- CIK
- 0001600133
- Portfolio Value
- $84.0M (Q4 2025)
- SEC Filing
- 0001172661-26-000830 ↗ filed Feb 17, 2026
Holdings Value
Holdings 16 stocks · $84.0M
| TWLO Twilio Inc. Class A | 10.28% | 60,755 | $8.6M | No change |
| MRCY Mercury Systems Inc. | 9.01% | 103,762 | $7.6M | Reduce -24.3% |
| VSAT Viasat Inc. | 8.27% | 201,750 | $7.0M | Reduce -24.4% |
| ALV Autoliv Inc. | 7.89% | 55,839 | $6.6M | No change |
| PSO Pearson PLC-Sponsored ADR | 7.66% | 458,338 | $6.4M | No change |
| CRL Charles River Laboratories | 6.65% | 28,000 | $5.6M | No change |
| EXEL Exelixis Inc. | 6.28% | 120,335 | $5.3M | No change |
| SWX Southwest Gas Holdings Inc. | 6.07% | 63,798 | $5.1M | No change |
| BILL Bill Holdings Inc. | 5.84% | 90,000 | $4.9M | No change |
| WK Workiva Inc. | 5.34% | 52,000 | $4.5M | New |
| WEX Wex Inc. | 5.20% | 29,350 | $4.4M | New |
| TRIP Tripadvisor Inc. | 5.20% | 300,000 | $4.4M | No change |
| ETSY Etsy Inc. | 4.74% | 71,836 | $4.0M | Reduce -7.7% |
| ITGR Integer Holdings Corp. | 4.39% | 47,000 | $3.7M | New |
| LW Lamb Weston Holdings Inc. | 3.79% | 76,001 | $3.2M | No change |
| FUN Six Flags Entertainment Corp. | 3.40% | 186,500 | $2.9M | New |
Portfolio Sells Q3 2025 → Q4 2025
| QRVO Qorvo Inc. | Sold out | 0.00% | −7.75 |
| JHG Janus Henderson Group PLC | Sold out | 0.00% | −5.75 |
| ABG Asbury Automotive Group | Sold out | 0.00% | −5.00 |
| MTCH Match Group Inc. | Sold out | 0.00% | −4.50 |
| PFGC Performance Food Group Co. | Sold out | 0.00% | −4.29 |
| YETI Yeti Holdings Inc. | Sold out | 0.00% | −4.20 |
| MRCY Mercury Systems Inc. | Reduce -24.3% | 9.01% | −1.15 |
| ETSY Etsy Inc. | Reduce -7.7% | 4.74% | −0.22 |
| VSAT Viasat Inc. | Reduce -24.4% | 8.27% | +0.77 |
Portfolio Buys Q3 2025 → Q4 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 |