In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Harvey Partners, LLC reported 44 stock positions worth $1.1 billion . Its top holding was Enpro (NPO) at 5.1% of the portfolio, followed by BWX Technologies (BWXT, 4.9% ) and Azz (AZZ, 4.8% ). Compared with Q2 2025, it opened 5 new positions, sold out of 2, added to 25 and reduced 11. The biggest buy was a new position in Materion (MTRN) and the biggest sale an exit from Faro Technologies (FARO).
Location Tarrytown, NY
CIK 0001406484
Portfolio Value $1.1B (Q3 2025) Holdings 44 stocks · $1.1B Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q2 2025 NPO Enpro Inc. 249,000 $56.3M Add +4.2% BWXT BWX Technologies Inc. 289,500 $53.4M Reduce -13.7% AZZ Azz Inc. 485,414 $53.0M Reduce -19.1% GLDD Great Lakes Dredge & Dock Co. 3,700,551 $44.4M Reduce -0.9% ADEA Adeia Inc. 2,614,500 $43.9M Reduce -18.0% LASR Nlight Inc. 1,397,444 $41.4M Reduce -33.7% BV Brightview Holdings Inc. 2,949,000 $39.5M Add +5.0% WCN Waste Connections Inc. 224,000 $39.4M Reduce -22.1% MTRN Materion Corp. 318,000 $38.4M New MKSI MKS Inc. 289,000 $35.8M Add +7.2% THRM Gentherm Inc. 1,024,500 $34.9M Add +72.6% NGVT Ingevity Corp. 601,000 $33.2M Add +5.1% CALX Calix Inc. 533,500 $32.7M Add +1.8% AWI Armstrong World Industries 166,300 $32.6M Reduce -22.3% MLM Martin Marietta Materials 51,100 $32.2M Add +6.6% BATRK Atlanta Braves Holdings in-C 741,500 $30.8M Add +4.5% MRC MRC Global Inc. 2,042,286 $29.4M Add +5.5% LFUS Littelfuse Inc. 108,700 $28.2M Add +62.4% SMG Scotts Miracle-Gro Co. 471,500 $26.9M Add +3.2% ULS Ul Solutions Inc. Class A 370,000 $26.2M Add +10.8% CHKP Check Point Software Tech 123,000 $25.4M Add +1.8% ASTE Astec Industries Inc. 501,000 $24.1M Add +48.3% VRNS Varonis Systems Inc. 405,800 $23.3M Add +4.4% RTO Rentokil Initial PLC-SP ADR 885,000 $22.3M Reduce -27.5% CYBR Cyberark Software Ltd./Israel 44,200 $21.4M Add +12.6% NOK Nokia Corp.-Spon ADR 4,291,500 $20.6M Add +2.1% THR Thermon Group Holdings Inc. 771,500 $20.6M Add +20.6% CTS CTS Corp. 493,500 $19.7M Add +74.7% CWST Casella Waste Systems Inc. Class A 196,000 $18.6M Add +50.4% OEC Orion SA 2,424,995 $18.4M No change MANU Manchester United PLC Class A 1,102,500 $16.7M Add +15.8% VMEO Vimeo Inc. 1,988,500 $15.4M Add +1.3% QQQ Invesco QQQ Trust Series 1 24,480 $14.7M Add +40.0% KN Knowles Corp. 622,500 $14.5M New RSKD Riskified Ltd. Class A 3,093,000 $14.5M Add +20.4% VPG Vishay Precision Group 372,000 $11.9M Add +21.3% MTRX Matrix Service Co. 852,381 $11.1M Reduce -30.2% DECK Deckers Outdoor Corp. 100,000 $10.1M New IWM iShares Russell 2000 ETF 40,000 $9.7M No change APLD Applied Digital Corp. 250,000 $5.7M No change ICHR Ichor Holdings Ltd. 182,000 $3.2M New MIAX Miami International Holdings 50,000 $2.0M New SSTI Soundthinking Inc. 149,544 $1.8M Reduce -46.0% HBIO Harvard Bioscience Inc. 2,050,000 $899K Reduce -4.3%
Options reported separately and not counted above: IWM puts ($19.4M), QQQ puts ($6.0M).
Portfolio Sells Q2 2025 → Q3 2025 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2025 % Of Portfolio Change To Portfolio ▲ FARO Faro Technologies Inc. Sold out 0.00% −4.26 WCN Waste Connections Inc. Reduce -22.1% 3.58% −1.78 RTO Rentokil Initial PLC-SP ADR Reduce -27.5% 2.03% −0.89 AZZ Azz Inc. Reduce -19.1% 4.82% −0.84 MTRX Matrix Service Co. Reduce -30.2% 1.01% −0.63 ADEA Adeia Inc. Reduce -18.0% 4.00% −0.51 GLDD Great Lakes Dredge & Dock Co. Reduce -0.9% 4.04% −0.51 AWI Armstrong World Industries Reduce -22.3% 2.96% −0.51 LASR Nlight Inc. Reduce -33.7% 3.77% −0.37 CPRT Copart Inc. Sold out 0.00% −0.30 SSTI Soundthinking Inc. Reduce -46.0% 0.16% −0.20 HBIO Harvard Bioscience Inc. Reduce -4.3% 0.08% −0.01 BWXT BWX Technologies Inc. Reduce -13.7% 4.86% +0.03
Portfolio Buys Q2 2025 → Q3 2025 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q2 2025 % Of Portfolio Change To Portfolio ▼ MTRN Materion Corp. New 3.49% +3.49 THRM Gentherm Inc. Add +72.6% 3.17% +1.50 KN Knowles Corp. New 1.32% +1.32 LFUS Littelfuse Inc. Add +62.4% 2.56% +1.05 DECK Deckers Outdoor Corp. New 0.92% +0.92 ASTE Astec Industries Inc. Add +48.3% 2.19% +0.79 VMEO Vimeo Inc. Add +1.3% 1.40% +0.61 CTS CTS Corp. Add +74.7% 1.79% +0.59 MKSI MKS Inc. Add +7.2% 3.25% +0.58 NGVT Ingevity Corp. Add +5.1% 3.02% +0.56 NPO Enpro Inc. Add +4.2% 5.12% +0.55 QQQ Invesco QQQ Trust Series 1 Add +40.0% 1.34% +0.37 CYBR Cyberark Software Ltd./Israel Add +12.6% 1.94% +0.35 MLM Martin Marietta Materials Add +6.6% 2.93% +0.30 ICHR Ichor Holdings Ltd. New 0.29% +0.29 VPG Vishay Precision Group Add +21.3% 1.08% +0.22 CALX Calix Inc. Add +1.8% 2.98% +0.20 CWST Casella Waste Systems Inc. Class A Add +50.4% 1.69% +0.19 MIAX Miami International Holdings New 0.18% +0.18 VRNS Varonis Systems Inc. Add +4.4% 2.12% +0.15 THR Thermon Group Holdings Inc. Add +20.6% 1.88% +0.08 RSKD Riskified Ltd. Class A Add +20.4% 1.32% +0.04 MRC MRC Global Inc. Add +5.5% 2.68% +0.03 ULS Ul Solutions Inc. Class A Add +10.8% 2.38% −0.04 MANU Manchester United PLC Class A Add +15.8% 1.52% −0.17 NOK Nokia Corp.-Spon ADR Add +2.1% 1.88% −0.30 CHKP Check Point Software Tech Add +1.8% 2.31% −0.35 BATRK Atlanta Braves Holdings in-C Add +4.5% 2.81% −0.51 SMG Scotts Miracle-Gro Co. Add +3.2% 2.44% −0.57 BV Brightview Holdings Inc. Add +5.0% 3.59% −1.07
Options Activity Q2 2025 → Q3 2025 Security Type Change vs Q2 2025 Underlying Shares Value ▼ IWM iShares Russell 2000 ETF put New 80,000 $19.4M QQQ Invesco QQQ Trust Series 1 put Reduce -69.2% 10,000 $6.0M
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 2026 47 $1.4B NPO, MTRN, MKSI, NGVT, ADEA Q1 2026 45 $1.2B ADEA, NPO, MKSI, NGVT, BWXT Q4 2025 43 $1.1B NPO, GLDD, MKSI, ADEA, LASR Q3 2025 44 $1.1B NPO, BWXT, AZZ, GLDD, ADEA Q2 2025 41 $1.0B AZZ, WCN, BWXT, BV, NPO Q1 2025 41 $843.4M WCN, AZZ, ADEA, RTO, NPO Q4 2024 41 $887.1M AZZ, WCN, ADEA, GLDD, RTO Q3 2024 42 $869.5M AZZ, WCN, BWXT, GLDD, ADEA Q2 2024 39 $808.6M AZZ, WCN, BWXT, HII, OEC Q1 2024 40 $921.9M AZZ, BWXT, HII, VRNS, OEC