In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 17, 2026), Harvey Partners, LLC reported 43 stock positions worth $1.1 billion . Its top holding was Enpro (NPO) at 4.8% of the portfolio, followed by Great Lakes Dredge & Dock (GLDD, 4.4% ) and MKS (MKSI, 4.1% ). Compared with Q3 2025, it opened 6 new positions, sold out of 7, added to 27 and reduced 8. The biggest buy was a new position in Novanta (NOVT) and the biggest sale an exit from MRC Global (MRC).
Location Tarrytown, NY
CIK 0001406484
Portfolio Value $1.1B (Q4 2025) Holdings 43 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 Q3 2025 NPO Enpro Inc. 249,173 $53.4M Add +0.1% GLDD Great Lakes Dredge & Dock Co. 3,703,215 $48.6M Add +0.1% MKSI MKS Inc. 289,197 $46.2M Add +0.1% ADEA Adeia Inc. 2,616,383 $45.1M Add +0.1% LASR Nlight Inc. 1,202,502 $45.1M Reduce -13.9% BWXT BWX Technologies Inc. 251,472 $43.5M Reduce -13.1% MTRN Materion Corp. 319,500 $39.7M Add +0.5% WCN Waste Connections Inc. 224,159 $39.3M Add +0.1% AZZ Azz Inc. 364,585 $39.1M Reduce -24.9% THRM Gentherm Inc. 1,046,499 $38.1M Add +2.1% NGVT Ingevity Corp. 629,430 $37.2M Add +4.7% NOVT Novanta Inc. 304,000 $36.2M New BV Brightview Holdings Inc. 2,609,000 $33.1M Reduce -11.5% AWI Armstrong World Industries 171,547 $32.8M Add +3.2% MLM Martin Marietta Materials 51,135 $31.8M Add +0.1% LFUS Littelfuse Inc. 117,500 $29.7M Add +8.1% BATRK Atlanta Braves Holdings in-C 742,046 $29.3M Add +0.1% THR Thermon Group Holdings Inc. 772,070 $28.7M Add +0.1% CALX Calix Inc. 533,732 $28.3M Add +0.0% ASTE Astec Industries Inc. 621,700 $26.9M Add +24.1% RTO Rentokil Initial PLC-SP ADR 886,169 $26.1M Add +0.1% DNOW Dnow Inc. 1,939,399 $25.7M New ULS Ul Solutions Inc. Class A 307,758 $24.3M Reduce -16.8% BALL Ball Corp. 452,500 $24.0M New CTS CTS Corp. 544,044 $23.3M Add +10.2% CHKP Check Point Software Tech 123,101 $22.8M Add +0.1% NOK Nokia Corp.-Spon ADR 3,337,782 $21.6M Reduce -22.2% CYBR Cyberark Software Ltd./Israel 44,235 $19.7M Add +0.1% CWST Casella Waste Systems Inc. Class A 196,142 $19.2M Add +0.1% BCPC Balchem Corp. 116,000 $17.8M New MANU Manchester United PLC Class A 1,103,409 $17.6M Add +0.1% RSKD Riskified Ltd. Class A 3,095,477 $15.4M Add +0.1% VPG Vishay Precision Group 381,573 $14.7M Add +2.6% KN Knowles Corp. 652,500 $14.0M Add +4.8% VRNS Varonis Systems Inc. 406,085 $13.3M Add +0.1% SMG Scotts Miracle-Gro Co. 220,000 $12.8M Reduce -53.3% OEC Orion SA 2,409,415 $12.7M Reduce -0.6% MTRX Matrix Service Co. 852,678 $10.0M Add +0.0% VOO Vanguard S&P 500 ETF 14,200 $8.9M New ICHR Ichor Holdings Ltd. 482,500 $8.9M Add +165.1% APLD Applied Digital Corp. 250,000 $6.1M No change MIAX Miami International Holdings 50,000 $2.2M No change NP Neptune Insurance Holdi Class A 20,000 $583K New
Options reported separately and not counted above: IWM puts ($14.8M).
Portfolio Sells Q3 2025 → Q4 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 Q3 2025 % Of Portfolio Change To Portfolio ▲ MRC MRC Global Inc. Sold out 0.00% −2.68 VMEO Vimeo Inc. Sold out 0.00% −1.40 QQQ Invesco QQQ Trust Series 1 Sold out 0.00% −1.34 AZZ Azz Inc. Reduce -24.9% 3.51% −1.31 SMG Scotts Miracle-Gro Co. Reduce -53.3% 1.15% −1.29 BWXT BWX Technologies Inc. Reduce -13.1% 3.90% −0.95 DECK Deckers Outdoor Corp. Sold out 0.00% −0.92 IWM iShares Russell 2000 ETF Sold out 0.00% −0.88 BV Brightview Holdings Inc. Reduce -11.5% 2.97% −0.63 OEC Orion SA Reduce -0.6% 1.14% −0.53 ULS Ul Solutions Inc. Class A Reduce -16.8% 2.18% −0.21 SSTI Soundthinking Inc. Sold out 0.00% −0.16 HBIO Harvard Bioscience Inc. Sold out 0.00% −0.08 NOK Nokia Corp.-Spon ADR Reduce -22.2% 1.94% +0.06 LASR Nlight Inc. Reduce -13.9% 4.05% +0.28
Portfolio Buys Q3 2025 → Q4 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 Q3 2025 % Of Portfolio Change To Portfolio ▼ NOVT Novanta Inc. New 3.25% +3.25 DNOW Dnow Inc. New 2.31% +2.31 BALL Ball Corp. New 2.15% +2.15 BCPC Balchem Corp. New 1.60% +1.60 MKSI MKS Inc. Add +0.1% 4.15% +0.90 VOO Vanguard S&P 500 ETF New 0.80% +0.80 THR Thermon Group Holdings Inc. Add +0.1% 2.58% +0.70 ICHR Ichor Holdings Ltd. Add +165.1% 0.80% +0.51 NGVT Ingevity Corp. Add +4.7% 3.34% +0.33 GLDD Great Lakes Dredge & Dock Co. Add +0.1% 4.36% +0.33 RTO Rentokil Initial PLC-SP ADR Add +0.1% 2.34% +0.31 CTS CTS Corp. Add +10.2% 2.09% +0.30 THRM Gentherm Inc. Add +2.1% 3.42% +0.24 VPG Vishay Precision Group Add +2.6% 1.32% +0.23 ASTE Astec Industries Inc. Add +24.1% 2.42% +0.22 LFUS Littelfuse Inc. Add +8.1% 2.67% +0.11 MTRN Materion Corp. Add +0.5% 3.57% +0.07 RSKD Riskified Ltd. Class A Add +0.1% 1.38% +0.06 MANU Manchester United PLC Class A Add +0.1% 1.58% +0.06 ADEA Adeia Inc. Add +0.1% 4.05% +0.06 NP Neptune Insurance Holdi Class A New 0.05% +0.05 CWST Casella Waste Systems Inc. Class A Add +0.1% 1.72% +0.03 AWI Armstrong World Industries Add +3.2% 2.94% −0.02 WCN Waste Connections Inc. Add +0.1% 3.53% −0.05 KN Knowles Corp. Add +4.8% 1.26% −0.06 MLM Martin Marietta Materials Add +0.1% 2.86% −0.07 MTRX Matrix Service Co. Add +0.0% 0.90% −0.12 CYBR Cyberark Software Ltd./Israel Add +0.1% 1.77% −0.17 BATRK Atlanta Braves Holdings in-C Add +0.1% 2.63% −0.18 CHKP Check Point Software Tech Add +0.1% 2.05% −0.26 NPO Enpro Inc. Add +0.1% 4.79% −0.33 CALX Calix Inc. Add +0.0% 2.54% −0.44 VRNS Varonis Systems Inc. Add +0.1% 1.20% −0.93
Options Activity Q3 2025 → Q4 2025 Security Type Change vs Q3 2025 Underlying Shares Value ▼ IWM iShares Russell 2000 ETF put Reduce -25.0% 60,000 $14.8M QQQ Invesco QQQ Trust Series 1 put Sold out 10,000 $6.0Mbefore exit
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