Nierenberg Investment Management 13F, Q3 2025
David Nierenberg · quarter ending 30 September 2025 · filed 12 November 2025 · SEC CIK 1282683
Common stock only: shares the fund reported owning at the quarter end, valued as filed. The filing also lists 12 put and call lines, reported at the value of the underlying shares; they are not ownership and are not in these totals.
Largest positions, Q3 2025
The 25 largest of 40 positions. Weights are against the whole filed book. Changes are in shares held, against the Q2 2025 filing.
| Company | Ticker | Value | % of book | vs Q2 2025 |
|---|---|---|---|---|
| POTBELLY CORP | $50.79M | 28.1% | unchanged | |
| EQT CORP | EQT | $29.21M | 16.1% | unchanged |
| MR COOPER GROUP INC | $26.59M | 14.7% | -57% shares | |
| LYFT INC | LYFT | $17.91M | 9.9% | +1812% shares |
| RIVERVIEW BANCORP INC | RVSB | $10.92M | 6.0% | +5% shares |
| CRITEO S A | CRTO | $9.60M | 5.3% | -21% shares |
| GREEN DOT CORP | GDOT | $4.55M | 2.5% | unchanged |
| BROOKDALE SR LIVING INC | BKD | $3.47M | 1.9% | unchanged |
| ADTRAN HOLDINGS INC | ADTN | $3.22M | 1.8% | unchanged |
| KBR INC | KBR | $2.54M | 1.4% | unchanged |
| CONCENTRIX CORP | CNXC | $2.33M | 1.3% | unchanged |
| DIVERSIFIED HEALTHCARE TR | DHC | $2.01M | 1.1% | unchanged |
| ECOVYST INC | ECVT | $2.00M | 1.1% | unchanged |
| MATCH GROUP INC NEW | MTCH | $2.00M | 1.1% | unchanged |
| EXPAND ENERGY CORPORATION | EXE | $1.65M | 0.9% | unchanged |
| TUTOR PERINI CORP | TPC | $1.62M | 0.9% | -45% shares |
| DXC TECHNOLOGY CO | DXC | $1.36M | 0.8% | +635% shares |
| RANGE RES CORP | RRC | $1.11M | 0.6% | unchanged |
| SEABOARD CORP DEL | SEB | $1.04M | 0.6% | unchanged |
| PREFORMED LINE PRODS CO | PLPC | $893.5K | 0.5% | unchanged |
| BREAD FINANCIAL HOLDINGS INC | BFH | $857.7K | 0.5% | unchanged |
| HELIX ENERGY SOLUTIONS GRP I | HLX | $816.4K | 0.5% | unchanged |
| OSHKOSH CORP | OSK | $745.8K | 0.4% | unchanged |
| OIL STS INTL INC | OIS | $676.0K | 0.4% | unchanged |
| TECHTARGET INC | TTGT | $648.1K | 0.4% | new |
What changed since Q2 2025
Against the Q2 2025 filing, Nierenberg Investment Management opened 5 new positions, added to 4, trimmed 5, left 26 unchanged and exited 4. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
Other quarters
Source: SEC Form 13F-HR, accession 0001941040-25-000623, filed by Nierenberg Investment Management Company, LLC. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.