Nierenberg Investment Management Company, LLC
Long book
$200.8M
Q1 2026
Positions
44
Top-10 weight
87%
concentration
Last quarter
+2.5%
SPY +14.8%
Turnover
22%
of book per quarter
Strategy in plain words
auto-generated from filingsNierenberg Investment Management Company, LLC is an institutional manager, running a $200.8M US long book across 44 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. Turnover is modest: positions are typically held for years. Current anchor positions: ISHARES 0-3 MONTH TREASURY B, EQT CORP, CRITEO SA-SPON ADR, LYFT INC-A, KBR INC.
Over the last 9 quarters its long book ran on average 2.2pp per quarter behind the S&P 500, beating the index in 4 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+4.4%
Q2 2024
+5.7%
Q3 2024
+7.3%
Q4 2024
+1.6%
Q1 2025
+4.2%
Q2 2025
+0.5%
Q3 2025
-3.3%
Q4 2025
-2.1%
Q1 2026
+2.5%
Sector allocation
Energy 30%
Services media 28%
Financials 18%
Industrials 13%
Healthcare 4%
Technology 4%
Other 1%
Communications 1%
Long book by quarter
What does Nierenberg Investment own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| EQT EQT CORP | Energy | 533.4K | $33.9M | 16.9% | Held |
| LYFT LYFT INC-A | Services media | 1.3M | $17.2M | 8.6% | +59.3% |
| KBR KBR INC | Industrials | 386.4K | $14.2M | 7.1% | +424.3% |
| RVSB RIVERVIEW BANCORP INC | Financials | 2.0M | $11.2M | 5.6% | Held |
| CART MAPLEBEAR INC | Services media | 291.9K | $10.9M | 5.4% | New |
| RKT ROCKET COS INC-CLASS A | Financials | 429.6K | $6.1M | 3.0% | -67.9% |
| GDOT GREEN DOT CORP-CLASS A | Financials | 339.1K | $3.8M | 1.9% | Held |
| BKD BROOKDALE SENIOR LIVING INC | Healthcare | 255.1K | $3.5M | 1.7% | -37.8% |
| FIVN FIVE9 INC | Technology | 135.8K | $2.1M | 1.0% | New |
| G8L GREENLIGHT CAPITAL RE LTD-A | — | 102.5K | $1.8M | 0.9% | +84.5% |
| CNXC CONCENTRIX CORP | Services media | 64.5K | $1.8M | 0.9% | Held |
| FCN FTI CONSULTING INC | Services media | 9.8K | $1.7M | 0.9% | +2.4% |
| EXE EXPAND ENERGY CORP | Energy | 15.6K | $1.7M | 0.9% | Held |
| TNDM TANDEM DIABETES CARE INC | Healthcare | 79.5K | $1.5M | 0.8% | +78.5% |
| CCRN CROSS COUNTRY HEALTHCARE INC | Services media | 144.6K | $1.4M | 0.7% | New |
| DXC DXC TECHNOLOGY CO | Technology | 102.5K | $1.3M | 0.6% | Held |
| HLX HELIX ENERGY SOLUTIONS GROUP | Energy | 124.5K | $1.2M | 0.6% | Held |
| ADTN ADTRAN HOLDINGS INC | Technology | 93.1K | $1.2M | 0.6% | Held |
| OSK OSHKOSH CORP | Industrials | 5.8K | $846K | 0.4% | Held |
| TTGT TECHTARGET INC | Communications | 202.9K | $787K | 0.4% | +48.2% |
| FORR FORRESTER RESEARCH INC | Services media | 131.1K | $742K | 0.4% | +1034.7% |
| OCFC OCEANFIRST FINANCIAL CORP | Financials | 39.6K | $714K | 0.4% | New |
| HOPE HOPE BANCORP INC | Financials | 63.6K | $710K | 0.4% | +406.2% |
| TTEC TTEC HOLDINGS INC | Services media | 255.6K | $639K | 0.3% | +360.0% |
| CLFD CLEARFIELD INC | Technology | 16.5K | $437K | 0.2% | Held |
| FLR FLUOR CORP | Industrials | 6.6K | $306K | 0.2% | Held |
| PLAB PHOTRONICS INC | Technology | 6.3K | $256K | 0.1% | Held |
| BFH BREAD FINANCIAL HOLDINGS INC | Financials | 3.4K | $253K | 0.1% | -78.0% |
| DHX DHI GROUP INC | Services media | 84.6K | $238K | 0.1% | New |
| PTLO PORTILLO'S INC-CL A | Consumer discretionary | 33.6K | $178K | 0.1% | New |
| OSUR ORASURE TECHNOLOGIES INC | Healthcare | 55.6K | $167K | 0.1% | +24.7% |
| OIS OIL STATES INTERNATIONAL INC | Industrials | 11.6K | $135K | 0.1% | -89.6% |
| WNC WABASH NATIONAL CORP | Industrials | 12.6K | $108K | 0.1% | Held |
| ARHS ARHAUS INC | Consumer discretionary | 12.3K | $83K | 0.0% | -19.6% |
| SCYX SCYNEXIS INC | Healthcare | 75.6K | $69K | 0.0% | Held |
| ACH ACCENDRA HEALTH INC | Consumer discretionary | 27.6K | $63K | 0.0% | Held |
| TALK TALKSPACE INC | Healthcare | 11.6K | $60K | 0.0% | Held |
| CTMX CYTOMX THERAPEUTICS INC | Healthcare | 12.6K | $59K | 0.0% | Held |
| WTI W&T OFFSHORE INC | Energy | 13.6K | $46K | 0.0% | Held |
| OLPX OLAPLEX HOLDINGS INC | Other | 12.6K | $25K | 0.0% | Held |
| NNBR NN INC | Industrials | 13.6K | $20K | 0.0% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 13, 2026 | 46 | $201.5M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 47 | $206.0M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 12, 2025 | 52 | $234.0M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 11, 2025 | 49 | $188.2M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 13, 2025 | 57 | $183.2M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 13, 2025 | 51 | $180.2M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 13, 2024 | 54 | $176.5M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 13, 2024 | 53 | $178.7M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 13, 2024 | 44 | $179.5M | canonical | SEC ↗ |
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