Harvey Partners, LLC 13F holdings
Harvey Partners, LLC reported 46 positions with a total reported value of $1.4B as of 2026-06-30, in its 13F for Q2 2026, filed 2026-08-14. Top holdings by reported value: NPO ENPRO INC (5.4%), MTRN MATERION CORP (4.5%), MKSI MKS INC. (4.4%), NGVT INGEVITY CORP (3.8%), ADEA ADEIA INC (3.7%). Against 2026-03-31 it opened 6 new positions and exited 4. Next 13F due by 2026-11-14, the legal deadline 45 days after the quarter ending 2026-09-30.
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Top holdings
25 largest of 46 positions · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| NPO ENPRO INC | 207,593 | $78.2M | 5.4% |
| MTRN MATERION CORP | 220,068 | $65.4M | 4.5% |
| MKSI MKS INC. | 141,066 | $62.7M | 4.4% |
| NGVT INGEVITY CORP | 734,307 | $54.8M | 3.8% |
| ADEA ADEIA INC | 1,622,353 | $53.4M | 3.7% |
| LFUS LITTELFUSE INC | 112,547 | $51.2M | 3.6% |
| MLM MARTIN MARIETTA MATLS INC | 87,035 | $50.2M | 3.5% |
| AZZ AZZ INC | 323,137 | $50.1M | 3.5% |
| WCN WASTE CONNECTIONS INC | 287,122 | $47.9M | 3.3% |
| NOVT NOVANTA INC | 294,122 | $47.7M | 3.3% |
| BWXT BWX TECHNOLOGIES INC | 243,107 | $47.3M | 3.3% |
| THRM GENTHERM INC | 1,326,075 | $45.2M | 3.1% |
| BV BRIGHTVIEW HLDGS INC | 3,078,797 | $43.6M | 3.0% |
| ASTEC INDS INC | 674,000 | $41.2M | 2.9% |
| BALL BALL CORP | 653,286 | $40.8M | 2.8% |
| BATRA ATLANTA BRAVES HLDGS INC | 756,832 | $39.3M | 2.7% |
| POOL POOL CORP | 174,074 | $37.4M | 2.6% |
| SMG SCOTTS MIRACLE-GRO CO | 542,727 | $37.0M | 2.6% |
| CTS CTS CORP | 545,231 | $35.5M | 2.5% |
| AWI ARMSTRONG WORLD INDS INC NEW | 205,087 | $32.9M | 2.3% |
| ULS UL SOLUTIONS INC | 320,656 | $32.7M | 2.3% |
| CWST CASELLA WASTE SYS INC | 310,131 | $30.1M | 2.1% |
| CECO CECO ENVIRONMENTAL CORP | 311,132 | $28.2M | 2.0% |
| RTO RENTOKIL INITIAL PLC | 983,956 | $28.2M | 2.0% |
| VPG VISHAY PRECISION GROUP INC | 177,659 | $26.6M | 1.8% |
SEC FORM 13F · Q2 2026 · VALUES AS REPORTED, NOT PRICES
New positions this quarter
Held at 2026-06-30, not at 2026-03-31 · 6 in all · reported value as of 2026-06-30
Sold out
Held at 2026-03-31, gone by 2026-06-30 · 4 in all · reported value as of 2026-03-31
Biggest increases and decreases
Positions held at both quarter ends, by change in shares · reported value as of 2026-06-30
Increases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| MLM MARTIN MARIETTA MATLS INC | 63,925 | 87,035 | +36.2% | $50.2M |
| FWONA LIBERTY MEDIA CORP DEL | 183,500 | 276,119 | +50.5% | $25.5M |
| POOL POOL CORP | 135,000 | 174,074 | +28.9% | $37.4M |
| SMG SCOTTS MIRACLE-GRO CO | 437,500 | 542,727 | +24.1% | $37.0M |
| BALL BALL CORP | 560,000 | 653,286 | +16.7% | $40.8M |
| WCN WASTE CONNECTIONS INC | 258,500 | 287,122 | +11.1% | $47.9M |
| BCPC BALCHEM CORP | 114,800 | 136,057 | +18.5% | $23.0M |
| THRM GENTHERM INC | 1,233,500 | 1,326,075 | +7.5% | $45.2M |
| WH WYNDHAM HOTELS & RESORTS INC | 121,000 | 157,567 | +30.2% | $13.3M |
| CWST CASELLA WASTE SYS INC | 281,500 | 310,131 | +10.2% | $30.1M |
| BV BRIGHTVIEW HLDGS INC | 2,938,000 | 3,078,797 | +4.8% | $43.6M |
| SPY STATE STR SPDR S&P 500 ETF T | 13,000 | 15,000 | +15.4% | $11.2M |
Decreases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| MKSI MKS INC. | 243,396 | 141,066 | -42.0% | $62.7M |
| ADEA ADEIA INC | 2,754,500 | 1,622,353 | -41.1% | $53.4M |
| VPG VISHAY PRECISION GROUP INC | 401,571 | 177,659 | -55.8% | $26.6M |
| ICHR ICHOR HOLDINGS | 469,179 | 205,874 | -56.1% | $23.1M |
| MTRN MATERION CORP | 293,121 | 220,068 | -24.9% | $65.4M |
| NOK NOKIA CORP | 2,945,500 | 1,454,626 | -50.6% | $19.3M |
| NPO ENPRO INC | 253,500 | 207,593 | -18.1% | $78.2M |
| PANW PALO ALTO NETWORKS INC | 91,000 | 48,000 | -47.3% | $16.4M |
| CHKP CHECK POINT SOFTWARE TECH LT | 109,500 | 41,500 | -62.1% | $5.5M |
| LASR NLIGHT INC | 413,584 | 302,711 | -26.8% | $21.1M |
| CALX CALIX INC | 572,500 | 420,500 | -26.6% | $15.7M |
| AZZ AZZ INC | 351,500 | 323,137 | -8.1% | $50.1M |
CIK 1406484 · 13F FILINGS ON EDGAR · INFORMATIONAL ONLY
