Nierenberg Investment Management Company, LLC

In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 13, 2026), Nierenberg Investment Management Company, LLC reported 44 stock positions worth $200.8 million. Its top holding was iShares 0-3 Month Treasury B (SGOV) at 27.6% of the portfolio, followed by Eqt (EQT, 16.9%) and Criteo SA-Spon (CRTO, 9.4%). Compared with Q4 2025, it opened 6 new positions, sold out of 5, added to 11 and reduced 6. The biggest buy was KBR (KBR, shares +424%) and the biggest sale Rocket Cos Class A (RKT, shares −68%).

Most Recent 13F
Q2 2026
Location
Camas, WA
CIK
0001282683
Portfolio Value
$200.8M (Q1 2026)
SEC Filing
0001941040-26-000327 ↗ filed May 13, 2026

Holdings Value

0$50.0M$100.0M$150.0M$200.0M$250.0M Q1 2024: $171.0M Q1 2024 Q2 2024: $170.6M Q2 2024 Q3 2024: $166.9M Q3 2024 Q4 2024: $170.9M Q4 2024 Q1 2025: $171.2M Q1 2025 Q2 2025: $171.4M Q2 2025 Q3 2025: $180.9M Q3 2025 Q4 2025: $198.2M Q4 2025 Q1 2026: $200.8M $200.8M Q1 2026 Q2 2026: $201.4M Q2 2026

Holdings 44 stocks · $200.8M
SGOV iShares 0-3 Month Treasury B 27.60% 550,597 $55.4M Reduce -14.1%
EQT Eqt Corp. 16.90% 533,363 $33.9M No change
CRTO Criteo SA-Spon 9.40% 1,052,787 $18.9M Add +18.4%
LYFT LYFT Inc. Class A 8.58% 1,295,623 $17.2M Add +59.3%
KBR KBR Inc. 7.09% 386,443 $14.2M Add +424.3%
RVSB Riverview Bancorp Inc. 5.57% 2,032,775 $11.2M No change
CART Maplebear Inc. 5.44% 291,888 $10.9M New
RKT Rocket Cos Inc. Class A 3.05% 429,631 $6.1M Reduce -67.9%
GDOT Green Dot Corp. Class A 1.89% 339,110 $3.8M No change
BKD Brookdale Senior Living Inc. 1.74% 255,110 $3.5M Reduce -37.8%
DHC Diversified Healthcare Trust 1.51% 456,110 $3.0M No change
FIVN FIVE9 Inc. 1.03% 135,810 $2.1M New
GLRE Greenlight Capital Re Ltd. Class A 0.88% 102,510 $1.8M Add +84.5%
CNXC Concentrix Corp. 0.88% 64,480 $1.8M No change
FCN Fti Consulting Inc. 0.86% 9,780 $1.7M Add +2.4%
EXE Expand Energy Corp. 0.85% 15,555 $1.7M No change
TNDM Tandem Diabetes Care Inc. 0.76% 79,510 $1.5M Add +78.5%
CCRN Cross Country Healthcare Inc. 0.68% 144,555 $1.4M New
DXC DXC Technology Co. 0.64% 102,510 $1.3M No change
HOS Hornbeck Offshore Services I filed as HELIX ENERGY SOLUTIONS GRP I 0.61% 124,450 $1.2M No change
ADTN Adtran Holdings Inc. 0.58% 93,110 $1.2M No change
OSK Oshkosh Corp. 0.42% 5,750 $846K No change
TTGT Techtarget Inc. 0.39% 202,910 $787K Add +48.2%
FORR Forrester Research Inc. 0.37% 131,110 $742K Add +1034.7%
OCFC Oceanfirst Financial Corp. 0.36% 39,555 $714K New
HOPE Hope Bancorp Inc. 0.35% 63,555 $710K Add +406.2%
TTEC Ttec Holdings Inc. filed as TTEC HLDGS INC 0.32% 255,555 $639K Add +360.0%
CLFD Clearfield Inc. 0.22% 16,510 $437K No change
FLR Fluor Corp. 0.15% 6,555 $306K No change
PLAB Photronics Inc. 0.13% 6,330 $256K No change
BFH Bread Financial Holdings Inc. 0.13% 3,380 $253K Reduce -78.0%
DHX Dhi Group Inc. 0.12% 84,555 $238K New
PTLO Portillo's Inc. Class A 0.09% 33,555 $178K New
OSUR Orasure Technologies Inc. 0.08% 55,555 $167K Add +24.7%
OIS Oil States International Inc. filed as OIL STS INTL INC 0.07% 11,555 $135K Reduce -89.6%
WNC Wabash National Corp. 0.05% 12,555 $108K No change
ARHS Arhaus Inc. 0.04% 12,310 $83K Reduce -19.6%
SCYX Scynexis Inc. 0.03% 75,555 $69K No change
ACH Accendra Health Inc. 0.03% 27,555 $63K No change
TALK Talkspace Inc. 0.03% 11,555 $60K No change
CTMX Cytomx Therapeutics Inc. 0.03% 12,555 $59K No change
WTI W&T Offshore Inc. 0.02% 13,555 $46K No change
OLPX Olaplex Holdings Inc. 0.01% 12,555 $25K No change
NNBR NN Inc. 0.01% 13,555 $20K No change

Options reported separately and not counted above: CNXC calls ($547K), ACH calls ($114K).

Portfolio Sells Q4 2025 → Q1 2026
RKT Rocket Cos Inc. Class A Reduce -67.9% 3.05% −10.01
SGOV iShares 0-3 Month Treasury B Reduce -14.1% 27.60% −4.85
ECVT Ecovyst Inc. Sold out 0.00% −1.12
SEB Seaboard Corp. Sold out 0.00% −0.64
VRT Vertiv Holdings Co. Class A Sold out 0.00% −0.57
BKD Brookdale Senior Living Inc. Reduce -37.8% 1.74% −0.49
BFH Bread Financial Holdings Inc. Reduce -78.0% 0.13% −0.45
OIS Oil States International Inc. Reduce -89.6% 0.07% −0.31
GIFI Gulf Island Fabrication Inc. Sold out 0.00% −0.11
ARHS Arhaus Inc. Reduce -19.6% 0.04% −0.04
EB Eventbrite Inc. Class A Sold out 0.00% −0.03

Portfolio Buys Q4 2025 → Q1 2026
KBR KBR Inc. Add +424.3% 7.09% +5.60
CART Maplebear Inc. New 5.44% +5.44
FIVN FIVE9 Inc. New 1.03% +1.03
CCRN Cross Country Healthcare Inc. New 0.68% +0.68
LYFT LYFT Inc. Class A Add +59.3% 8.58% +0.63
GLRE Greenlight Capital Re Ltd. Class A Add +84.5% 0.88% +0.47
OCFC Oceanfirst Financial Corp. New 0.36% +0.36
FORR Forrester Research Inc. Add +1034.7% 0.37% +0.32
HOPE Hope Bancorp Inc. Add +406.2% 0.35% +0.28
TNDM Tandem Diabetes Care Inc. Add +78.5% 0.76% +0.26
TTEC Ttec Holdings Inc. Add +360.0% 0.32% +0.22
CRTO Criteo SA-Spon Add +18.4% 9.40% +0.16
DHX Dhi Group Inc. New 0.12% +0.12
PTLO Portillo's Inc. Class A New 0.09% +0.09
FCN Fti Consulting Inc. Add +2.4% 0.86% +0.04
OSUR Orasure Technologies Inc. Add +24.7% 0.08% +0.03
TTGT Techtarget Inc. Add +48.2% 0.39% +0.02

Options Activity Q4 2025 → Q1 2026
GEV GE Vernova Inc. put Sold out 7,600 $5.0Mbefore exit
EXE Expand Energy Corp. call Sold out 14,000 $1.5Mbefore exit
ACH Accendra Health Inc. put Sold out 150,000 $420Kbefore exit
ACH Accendra Health Inc. call New 50,000 $114K

Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 35$201.4MSGOV, EQT, CRTO, LYFT, CART
Q1 2026 44$200.8MSGOV, EQT, CRTO, LYFT, KBR
Q4 2025 43$198.2MSGOV, EQT, RKT, CRTO, LYFT
Q3 2025 40$180.9MPBPB, EQT, COOP, LYFT, RVSB
Q2 2025 39$171.4MCOOP, PBPB, EQT, CRTO, RVSB
Q1 2025 47$171.2MCOOP, EQT, PBPB, CTLP, CRTO
Q4 2024 46$170.9MCOOP, PBPB, CTLP, EQT, EBC
Q3 2024 47$166.9MCOOP, PBPB, FLR, EQT, CTLP
Q2 2024 45$170.6MCOOP, PBPB, FLR, EQT, CTLP
Q1 2024 35$171.0MCOOP, PBPB, FLR, EQT, CTLP