Nierenberg Investment Management Company, Inc.
Comparing Q4 2025 vs Q3 2025
Sorting applies to all holdings for this quarter on the server, then the page is sliced. Prior-quarter values come from the full prior-quarter filing.
Issuer ▲▼ | Shares | Value ($K) | ||||
|---|---|---|---|---|---|---|
Q3 2025 ▲▼ | Q4 2025 ▲▼ | Change ▲▼ | Q3 2025 ▲▼ | Q4 2025 ▲▼ | Change ▲▼ | |
| ISHARES TR | 0 | 640,597 | +640,597 | 0 | 64,303,127 | +64,303,127 |
| ROCKET COS INC | 0 | 1,336,631 | +1,336,631 | 0 | 25,877,176 | +25,877,176 |
| CRITEO S A | 424,959 | 888,888 | +463,929 | 9,604,073 | 18,319,982 | +8,715,909 |
| FTI CONSULTING INC | 0 | 9,555 | +9,555 | 0 | 1,632,281 | +1,632,281 |
| VERTIV HOLDINGS CO | 0 | 7,000 | +7,000 | 0 | 1,134,070 | +1,134,070 |
| TANDEM DIABETES CARE INC | 0 | 44,555 | +44,555 | 0 | 979,319 | +979,319 |
| BROOKDALE SR LIVING INC | 410,110 | 410,110 | 0 | 3,473,632 | 4,425,087 | +951,455 |
| CONCENTRIX CORP(Call) | 0 | 20,000 | +20,000 | 0 | 831,600 | +831,600 |
| GREENLIGHT CAPITAL RE LTD | 0 | 55,555 | +55,555 | 0 | 809,992 | +809,992 |
| KBR INC | 53,710 | 73,710 | +20,000 | 2,539,946 | 2,963,142 | +423,196 |
| CONCENTRIX CORP | 50,480 | 64,480 | +14,000 | 2,329,652 | 2,681,078 | +351,426 |
| BREAD FINANCIAL HOLDINGS INC | 15,380 | 15,380 | 0 | 857,743 | 1,138,581 | +280,838 |
| SEABOARD CORP DEL | 286 | 286 | 0 | 1,043,042 | 1,271,219 | +228,177 |
| ECOVYST INC | 228,810 | 228,810 | 0 | 2,004,376 | 2,226,321 | +221,945 |
| PHOTRONICS INC | 0 | 6,330 | +6,330 | 0 | 202,560 | +202,560 |
| DIVERSIFIED HEALTHCARE TR | 456,110 | 456,110 | 0 | 2,011,445 | 2,212,134 | +200,689 |
| TTEC HLDGS INC | 0 | 55,555 | +55,555 | 0 | 199,998 | +199,998 |
| DXC TECHNOLOGY CO | 99,555 | 102,510 | +2,955 | 1,356,935 | 1,501,772 | +144,837 |
| HOPE BANCORP INC | 0 | 12,555 | +12,555 | 0 | 137,603 | +137,603 |
| TECHTARGET INC | 111,555 | 136,910 | +25,355 | 648,135 | 739,314 | +91,179 |
| GULF IS FABRICATION INC | 17,555 | 17,555 | 0 | 123,236 | 210,133 | +86,897 |
| OIL STS INTL INC | 111,555 | 111,555 | 0 | 676,023 | 755,227 | +79,204 |
| EXPAND ENERGY CORPORATION | 15,555 | 15,555 | 0 | 1,652,563 | 1,716,650 | +64,087 |
| EXPAND ENERGY CORPORATION(Call) | 14,000 | 14,000 | 0 | 1,487,360 | 1,545,040 | +57,680 |
| EVENTBRITE INC | 11,555 | 11,555 | 0 | 29,119 | 51,420 | +22,301 |
| CYTOMX THERAPEUTICS INC | 12,555 | 12,555 | 0 | 40,050 | 53,484 | +13,434 |
| TALKSPACE INC | 11,555 | 11,555 | 0 | 31,892 | 41,945 | +10,053 |
| OLAPLEX HLDGS INC | 12,555 | 12,555 | 0 | 16,447 | 16,824 | +377 |
| W & T OFFSHORE INC | 13,555 | 13,555 | 0 | 24,670 | 22,095 | -2,575 |
| SCYNEXIS INC | 75,555 | 75,555 | 0 | 58,177 | 47,781 | -10,396 |
| NN INC | 13,555 | 13,555 | 0 | 27,923 | 17,350 | -10,573 |
| WABASH NATL CORP | 12,555 | 12,555 | 0 | 123,918 | 108,601 | -15,317 |
| FLUOR CORP NEW | 6,555 | 6,555 | 0 | 275,769 | 259,775 | -15,994 |
| OSHKOSH CORP | 5,750 | 5,750 | 0 | 745,775 | 722,373 | -23,402 |
| FORRESTER RESH INC | 11,555 | 11,555 | 0 | 122,483 | 93,827 | -28,656 |
| ORASURE TECHNOLOGIES INC | 44,555 | 44,555 | 0 | 143,022 | 107,823 | -35,199 |
| HELIX ENERGY SOLUTIONS GRP I | 124,450 | 124,450 | 0 | 816,392 | 780,302 | -36,090 |
| OWENS & MINOR INC NEW | 27,555 | 27,555 | 0 | 132,264 | 77,154 | -55,110 |
| CLEARFIELD INC | 16,510 | 16,510 | 0 | 567,614 | 481,267 | -86,347 |
| GREEN DOT CORP | 339,110 | 339,110 | 0 | 4,554,247 | 4,343,999 | -210,248 |
| OWENS & MINOR INC NEW(Put) | 150,000 | 150,000 | 0 | 720,000 | 420,000 | -300,000 |
| ARHAUS INC | 59,310 | 15,310 | -44,000 | 630,465 | 171,625 | -458,840 |
| EATON CORP PLC(Put) | 1,600 | 0 | -1,600 | 598,800 | 0 | -598,800 |
| BERRY CORP(Call) | 160,000 | 0 | -160,000 | 604,800 | 0 | -604,800 |
| EQT CORP | 536,693 | 533,363 | -3,330 | 29,212,200 | 28,588,257 | -623,943 |
| RIVERVIEW BANCORP INC | 2,032,775 | 2,032,775 | 0 | 10,916,002 | 10,204,531 | -711,471 |
| PREFORMED LINE PRODS CO | 4,555 | 0 | -4,555 | 893,463 | 0 | -893,463 |
| RANGE RES CORP | 29,555 | 0 | -29,555 | 1,112,450 | 0 | -1,112,450 |
| TUTOR PERINI CORP | 24,680 | 0 | -24,680 | 1,618,761 | 0 | -1,618,761 |
| GE VERNOVA INC(Put) | 11,200 | 7,600 | -3,600 | 6,886,880 | 4,967,132 | -1,919,748 |
| MATCH GROUP INC NEW | 56,680 | 0 | -56,680 | 2,001,938 | 0 | -2,001,938 |
| LYFT INC | 813,555 | 813,555 | 0 | 17,906,346 | 15,758,560 | -2,147,786 |
| CONSTELLATION ENERGY CORP(Put) | 7,100 | 0 | -7,100 | 2,336,397 | 0 | -2,336,397 |
| ADTRAN HOLDINGS INC | 343,110 | 93,110 | -250,000 | 3,218,372 | 809,126 | -2,409,246 |
| ARISTA NETWORKS INC(Put) | 18,600 | 0 | -18,600 | 2,710,206 | 0 | -2,710,206 |
| VERTIV HOLDINGS CO(Put) | 21,200 | 0 | -21,200 | 3,198,232 | 0 | -3,198,232 |
| BROADCOM INC(Put) | 10,200 | 0 | -10,200 | 3,365,082 | 0 | -3,365,082 |
| NVIDIA CORPORATION(Put) | 22,800 | 0 | -22,800 | 4,254,024 | 0 | -4,254,024 |
| INVESCO QQQ TR(Put) | 17,100 | 0 | -17,100 | 10,266,327 | 0 | -10,266,327 |
| SPDR S&P 500 ETF TR(Put) | 25,000 | 0 | -25,000 | 16,654,500 | 0 | -16,654,500 |
| MR COOPER GROUP INC | 126,121 | 0 | -126,121 | 26,585,046 | 0 | -26,585,046 |
| POTBELLY CORP | 2,980,564 | 0 | -2,980,564 | 50,788,811 | 0 | -50,788,811 |