CIK: 0001282683
Total reported value
$201.5M
Reporting period: 2026-03-31 · Number of holdings: 46
Nierenberg Investment Management Company, LLC disclosed 46 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $201.5M and a quarterly turnover rate of 41.9%.
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Nierenberg Investment Management Company, LLC's disclosed holdings carry a Herfindahl concentration index of 0.134 — mathematically equivalent to about 7 equally-sized positions, well below its 46 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.24), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 46% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim RKT
-67.9% -$19.8M
Add KBR
+424.3% $11.3M
Trim SGOV
-14.0% -$8.9M
Add EQT
0.0% $5.4M
Add LYFT
+59.3% $1.5M
Trim EXE
-47.4% -$1.6M
Showing top 44 holdings (of 46 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | SGOV | Ishares 0-3 Month Treasury B | ETF-Gov Bonds | 27.51% | -3.71% | -14.05% | |
| 2 | EQT | Eqt CORP | Stock-Energy | 16.85% | +2.97% | — | |
| 3 | CRTO | Criteo Sa-spon Adr | Stock-Other | 9.37% | +0.47% | +18.44% | |
| 4 | LYFT | Lyft Inc-a | Stock-Tech | 8.55% | +0.90% | +59.25% | |
| 5 | KBR | Kbr INC | Stock-Industrials | 7.07% | +5.63% | +424.27% | |
| 6 | RVSB | Riverview Bancorp INC | Stock-Other | 5.55% | +0.60% | — | |
| 7 | CART | Maplebear INC | Stock-Consumer Disc | 5.43% | +5.43% | NEW | |
| 8 | RKT | Rocket Cos Inc-class A | Stock-Financials | 3.04% | -9.52% | -67.86% | |
| 9 | GDOT | Green Dot Corp-class A | Stock-Other | 1.89% | -0.22% | — | |
| 10 | BKD | Brookdale Senior Living INC | Stock-Other | 1.73% | -0.42% | -37.79% | |
| 11 | DHC | Diversified Healthcare Trust | Stock-Other | 1.50% | +0.43% | — | |
| 12 | CNXC | Concentrix CORP | Stock-Tech | 1.15% | -0.56% | — | |
| 13 | FIVN | Five9 INC | Stock-Tech | 1.02% | +1.02% | NEW | |
| 14 | GLRE | Greenlight Capital Re, Ltd. | Stock-Other | 0.88% | +0.49% | +84.52% | |
| 15 | FCN | Fti Consulting INC | Stock-Industrials | 0.86% | +0.07% | +2.35% | |
| 16 | EXE | Expand Energy CORP | Stock-Energy | 0.85% | -0.73% | -47.37% | |
| 17 | TNDM | Tandem Diabetes Care INC | Stock-Other | 0.76% | +0.28% | +78.45% | |
| 18 | CCRN | Cross Country Healthcare INC | Stock-Other | 0.67% | +0.67% | NEW | |
| 19 | DXC | Dxc Technology Co | Stock-Tech | 0.64% | -0.09% | — | |
| 20 | HLX | Helix Energy Solutions Group | Stock-Other | 0.61% | +0.23% | — | |
| 21 | ADTN | Adtran Holdings INC | Stock-Other | 0.58% | +0.19% | — | |
| 22 | OSK | Oshkosh CORP | Stock-Industrials | 0.42% | +0.07% | — | |
| 23 | TTGT | Techtarget INC | Stock-Other | 0.39% | +0.03% | +48.21% | |
| 24 | FORR | Forrester Research INC | Stock-Other | 0.37% | +0.32% | +1034.66% | |
| 25 | OCFC | Oceanfirst Financial CORP | Stock-Other | 0.35% | +0.35% | NEW | |
| 26 | HOPE | Hope Bancorp INC | Stock-Other | 0.35% | +0.28% | +406.21% | |
| 27 | TTEC | Ttec Holdings INC | Stock-Other | 0.32% | +0.22% | +360.00% | |
| 28 | CLFD | Clearfield INC | Stock-Other | 0.22% | -0.01% | — | |
| 29 | FLR | Fluor CORP | Stock-Industrials | 0.15% | +0.02% | — | |
| 30 | PLAB | Photronics INC | Stock-Other | 0.13% | +0.03% | — | |
| 31 | BFH | Bread Financial Holdings INC | Stock-Financials | 0.13% | -0.42% | -78.02% | |
| 32 | DHX | Dhi Group INC | Stock-Other | 0.12% | +0.12% | NEW | |
| 33 | PTLO | Portillo's Inc-cl A | Stock-Other | 0.09% | +0.09% | NEW | |
| 34 | ACH | Accendra Health INC | Stock-Other | 0.09% | -0.15% | -56.32% | |
| 35 | OSUR | Orasure Technologies INC | Stock-Other | 0.08% | +0.03% | +24.69% | |
| 36 | OIS | Oil States International INC | Stock-Other | 0.07% | -0.30% | -89.64% | |
| 37 | WNC | Wabash National CORP | Stock-Other | 0.05% | — | — | |
| 38 | ARHS | Arhaus INC | Stock-Other | 0.04% | -0.04% | -19.59% | |
| 39 | SCYXEUR | Scynexis INC | Stock-Other | 0.03% | +0.01% | — | |
| 40 | TALK | Talkspace INC | Stock-Other | 0.03% | +0.01% | — | |
| 41 | CTMX | Cytomx Therapeutics INC | Stock-Other | 0.03% | — | — | |
| 42 | WTI | W&t Offshore INC | Stock-Other | 0.02% | +0.01% | — | |
| 43 | OLPX | Olaplex Holdings INC | Stock-Other | 0.01% | — | — | |
| 44 | NNBR | Nn INC | Stock-Other | 0.01% | — | — |
Performance for Q3 2026
-0.4%
Performance Last 4 Quarters
+7.8%
Based on 64% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 46 | $201.5M | 42 | |
| 2025-12-31 | 47 | $206.0M | 100 | |
| 2025-09-30 | 52 | $234.0M | 66 | |
| 2025-06-30 | 49 | $188.2M | 0 | |
| 2025-03-31 | 57 | $183.2M | 100 | |
| 2024-12-31 | 51 | $180.2M | 0 | |
| 2024-09-30 | 54 | $176.5M | 0 | |
| 2024-06-30 | 53 | $178.7M | 0 | |
| 2024-03-31 | 44 | $179.5M | 0 | |
| 2023-12-31 | 46 | $166.7M | 0 | |
| 2023-09-30 | 33 | $139.3M | 0 | |
| 2023-06-30 | 32 | $146.2M | 0 | |
| 2023-03-31 | 36 | $132.7M | 0 | |
| 2022-12-31 | 38 | $132.8M | 0 | |
| 2022-09-30 | 41 | $120.4M | 0 | |
| 2022-06-30 | 40 | $120.3M | 0 | |
| 2022-03-31 | 41 | $141.5M | 0 | |
| 2021-12-31 | 38 | $121.6M | 0 | |
| 2021-09-30 | 39 | $129.0M | 0 | |
| 2021-06-30 | 36 | $121.8M | 100 | |
| 2021-03-31 | 33 | $128.2M | 48 | |
| 2020-12-31 | 32 | $108.0M | 100 | |
| 2015-09-30 | 8 | $68.9M | 37 | |
| 2015-06-30 | 8 | $82.1M | 31 | |
| 2015-03-31 | 6 | $64.3M | 59 | |
| 2014-12-31 | 6 | $75.1M | 23 | |
| 2014-09-30 | 7 | $81.6M | 21 | |
| 2014-06-30 | 7 | $84.5M | 46 | |
| 2014-03-31 | 7 | $97.2M | 23 | |
| 2013-12-31 | 7 | $110.7M | 17 | |
| 2013-09-30 | 8 | $126.6M | 32 | |
| 2013-06-30 | 5 | $136.3M | — |
Nierenberg Investment Management Company, LLC's most significant position changes for 2026-03-31: New buy: Maplebear INC (CART); Sold out: GE Vernova INC (GEV); Sold out: Ecovyst INC (ECVT); New buy: Five9 INC (FIVN); New buy: Cross Country Healthcare INC (CCRN).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | KBR | Kbr INC | +5.6% | +424.27% | Add |
| 2 | EQT | Eqt CORP | +3% | — | Unchanged |
| 3 | LYFT | Lyft Inc-a | +0.9% | +59.25% | Add |
| 4 | RVSB | Riverview Bancorp INC | +0.6% | — | Unchanged |
| 5 | GLRE | Greenlight Capital Re, Ltd. | +0.5% | +84.52% | Add |
| 6 | CRTO | Criteo Sa-spon Adr | +0.5% | +18.44% | Add |
| 7 | DHC | Diversified Healthcare Trust | +0.4% | — | Unchanged |
| 8 | FORR | Forrester Research INC | +0.3% | +1034.66% | Add |
| 9 | HOPE | Hope Bancorp INC | +0.3% | +406.21% | Add |
| 10 | TNDM | Tandem Diabetes Care INC | +0.3% | +78.45% | Add |
| 11 | HLX | Helix Energy Solutions Group | +0.2% | — | Unchanged |
| 12 | TTEC | Ttec Holdings INC | +0.2% | +360.00% | Add |
| 13 | ADTN | Adtran Holdings INC | +0.2% | — | Unchanged |
| 14 | OSK | Oshkosh CORP | +0.1% | — | Unchanged |
| 15 | FCN | Fti Consulting INC | +0.1% | +2.35% | Add |
| 16 | OSUR | Orasure Technologies INC | 0% | +24.69% | Add |
| 17 | PLAB | Photronics INC | 0% | — | Unchanged |
| 18 | TTGT | Techtarget INC | 0% | +48.21% | Add |
| 19 | FLR | Fluor CORP | 0% | — | Unchanged |
| 20 | WTI | W&t Offshore INC | 0% | — | Unchanged |
| 21 | SCYXEUR | Scynexis INC | 0% | — | Unchanged |
| 22 | TALK | Talkspace INC | 0% | — | Unchanged |
| 23 | OLPX | Olaplex Holdings INC | — | — | Unchanged |
| 24 | CTMX | Cytomx Therapeutics INC | — | — | Unchanged |
| 25 | NNBR | Nn INC | — | — | Unchanged |
| 26 | WNC | Wabash National CORP | — | — | Unchanged |
| 27 | CLFD | Clearfield INC | 0% | — | Unchanged |
| 28 | ARHS | Arhaus INC | 0% | -19.59% | Trim |
| 29 | DXC | Dxc Technology Co | -0.1% | — | Unchanged |
| 30 | ACH | Accendra Health INC | -0.2% | -56.32% | Trim |
| 31 | GDOT | Green Dot Corp-class A | -0.2% | — | Unchanged |
| 32 | OIS | Oil States International INC | -0.3% | -89.64% | Trim |
| 33 | BKD | Brookdale Senior Living INC | -0.4% | -37.79% | Trim |
| 34 | BFH | Bread Financial Holdings INC | -0.4% | -78.02% | Trim |
| 35 | CNXC | Concentrix CORP | -0.6% | — | Unchanged |
| 36 | EXE | Expand Energy CORP | -0.7% | -47.37% | Trim |
| 37 | SGOV | Ishares 0-3 Month Treasury B | -3.7% | -14.05% | Trim |
| 38 | RKT | Rocket Cos Inc-class A | -9.5% | -67.86% | Trim |
| 39 | CART | Maplebear INC | — | NEW | New buy |
| 40 | GEV | GE Vernova INC | — | EXIT | Sold out |
| 41 | ECVT | Ecovyst INC | — | EXIT | Sold out |
| 42 | FIVN | Five9 INC | — | NEW | New buy |
| 43 | CCRN | Cross Country Healthcare INC | — | NEW | New buy |
| 44 | SEB | Seaboard CORP | — | EXIT | Sold out |
| 45 | VRT | Vertiv Holdings Co-a | — | EXIT | Sold out |
| 46 | OCFC | Oceanfirst Financial CORP | — | NEW | New buy |
| 47 | DHX | Dhi Group INC | — | NEW | New buy |
| 48 | GIFI | Gulf Island Fabrication INC | — | EXIT | Sold out |
| 49 | PTLO | Portillo's Inc-cl A | — | NEW | New buy |
| 50 | EB4 | Eventbrite Inc-class A | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-13 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-13 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-12 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-11 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-13 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-13 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-13 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-13 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-13 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-13 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-11 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-12 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-10 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-10 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-12 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-13 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-11 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-10 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-14 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-16 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-12 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-12 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-13 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-12 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-12 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-13 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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