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Nierenberg Investment Management Company, LLC — 13F Holdings & Portfolio

CIK 1282683 · latest 13F-HR filed 2026-08-11

Backtest portfolio

Nierenberg Investment Management Company, LLC manages $201.4M in 13F-reported U.S. long-equity assets across 35 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are SGOV (23.04%), EQT (14.08%), CRTO (9.55%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 3 new positions and exited 12; 15 existing positions rose in reported value and 13 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Loading holdings…
AUM
$201.4M

Long-equity book

Holdings
35

Distinct positions

Period
2026-06-30

Filed 2026-08-11

Q/Q Activity
+3 / −12 / ↑15 / ↓13

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
SGOV23.0% · -16%EQT14.1% · 0%CRTO9.6% · 0%LYFT9.4% · 0%CART6.9% · 0%KBR6.6% · 0%RVSB5.5% · 0%FCN5.5% · +656%RKT3.4% · 0%GDOT2.3% · 0%DHC2.1% · 0%BKD2.0% · 0%FIVN1.4% · 0%TNDM1.2% · +100%HAE1.0% · newGLRE0.8% · 0%REI0.8% · newCNXC0.7% · 0%EXE0.7% · 0%FORR0.5% · 0%HLX0.5% · 0%DXC0.5% · 0%OSK0.4% · 0%TTEC0.2% · 0%TTGT0.2% · -32%FLR0.2% · 0%DHX0.2% · 0%OSUR0.1% · 0%ARHS0.1% · 0%OIS0.0% · 0%TALK0.0% · 0%NNBR0.0% · 0%CTMX0.0% · 0%WTI0.0% · 0%CNDT0.0% · new

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 86.1%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 13, 2026.

Assets Under Management
$235.5M
Discretionary
$235.5M
Employees
3
Accounts
4
Phone
(360) 604-8600
Website
Name Title / Status Ownership Type
BAUER-KUEHL, HANNELORE, NMN ControlCHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER
since Aug 2015
Less than 5%Individual
BENEDICT, DAMON, LAUGHLIN ControlPRESIDENT
since Jan 2026
75% or moreIndividual
Ownership & leadership changes · 6 filings with changes since Feb 14, 2012

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Feb 2, 2026 filing
  • No longer listedNIERENBERG, DAVID · PRESIDENT · 75% or more · control person · listed since Dec 1995
  • No longer listedNIERENBERG, PATRICIA, ANN · SECRETARY/TREASURER · Less than 5% · control person · listed since Dec 1995
  • ChangedBENEDICT, DAMON, LAUGHLIN · title VICE PRESIDENT → PRESIDENT; ownership Less than 5% → 75% or more
Mar 28, 2023 filing
  • No longer listedNIERENBERG, DAVID · SHAREHOLDER · 75% or more · indirect via NIERENBERG INVESTMENT MANAGEMENT COMPANY, INC. · control person · listed since Aug 2003
Mar 23, 2020 filing
  • No longer listedNIERENBERG INVESTMENT MANAGEMENT COMPANY, INC. · SHAREHOLDER OF NIERENBERG INVESTMENT MANAGEMENT OFFSHORE, INC. · 75% or more · control person · listed since Aug 2003
Aug 3, 2015 filing
  • No longer listedSETO, LYSUN, NMN · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5% · control person · listed since Jul 2014
  • AddedBAUER-KUEHL, HANNELORE, NMN · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5% · control person
Jul 1, 2014 filing
  • No longer listedBASS, CARRIE, E. · CHIEF COMPLIANCE OFFICER, CHIEF FINANCIAL OFFICER AND CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Jan 2012
  • AddedSETO, LYSUN, NMN · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5% · control person
May 2, 2014 filing
  • No longer listedJACOBSEN, CARA, MARIE · VICE PRESIDENT · Less than 5% · control person · listed since Jan 2004
  • AddedBENEDICT, DAMON, LAUGHLIN · VICE PRESIDENT · Less than 5% · control person
Feb 14, 2012 filing (earliest on record)
  • ListedBASS, CARRIE, E. · CHIEF COMPLIANCE OFFICER, CHIEF FINANCIAL OFFICER AND CHIEF OPERATING OFFICER · Less than 5% · control person
  • ListedJACOBSEN, CARA, MARIE · VICE PRESIDENT · Less than 5% · control person
  • ListedNIERENBERG INVESTMENT MANAGEMENT COMPANY, INC. · SHAREHOLDER OF NIERENBERG INVESTMENT MANAGEMENT OFFSHORE, INC. · 75% or more · control person
  • ListedNIERENBERG, DAVID · PRESIDENT · 75% or more · control person
  • ListedNIERENBERG, DAVID · SHAREHOLDER · 75% or more · indirect via NIERENBERG INVESTMENT MANAGEMENT COMPANY, INC. · control person
  • ListedNIERENBERG, PATRICIA, ANN · SECRETARY/TREASURER · Less than 5% · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 15 →

Top Trims

Show all 13 →

New Positions

Show all 3 →

Exited Positions

Show all 12 →

Nierenberg Investment Management Company, LLC Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 ISHARES TR SGOV 46436E718 $46.4M 23.04% 461,047 SH
2 EQT CORP EQT 26884L109 $28.4M 14.08% 533,363 SH
3 CRITEO S A CRTO 226718104 $19.2M 9.55% 1,052,787 SH
4 LYFT INC LYFT 55087P104 $18.9M 9.40% 1,295,623 SH
5 MAPLEBEAR INC CART 565394103 $13.8M 6.86% 291,888 SH
6 KBR INC KBR 48242W106 $13.3M 6.62% 386,443 SH
7 RIVERVIEW BANCORP INC RVSB 769397100 $11.0M 5.48% 2,032,775 SH
8 FTI CONSULTING INC FCN 302941109 $11.0M 5.47% 73,887 SH
9 ROCKET COS INC RKT 77311W101 $6.8M 3.36% 429,631 SH
10 GREEN DOT CORP GDOT 39304D102 $4.6M 2.27% 339,110 SH
11 DIVERSIFIED HEALTHCARE TR DHC 25525P107 $4.2M 2.11% 456,110 SH
12 BROOKDALE SR LIVING INC BKD 112463104 $4.1M 2.04% 255,110 SH
13 FIVE9 INC FIVN 338307101 $2.9M 1.44% 135,810 SH
14 TANDEM DIABETES CARE INC TNDM 875372203 $2.4M 1.19% 158,910 SH
15 HAEMONETICS CORP MASS HAE 405024100 $2.0M 0.98% 26,280 SH
16 GREENLIGHT CAP RE LTD GLRE G4095J109 $1.7M 0.82% 102,510 SH
17 RING ENERGY INC REI 76680V108 $1.5M 0.75% 1,399,555 SH
18 CONCENTRIX CORP CNXC 20602D101 $1.4M 0.72% 64,480 SH
19 EXPAND ENERGY CORPORATION EXE 165167735 $1.4M 0.70% 15,555 SH
20 FORRESTER RESH INC FORR 346563109 $1.1M 0.55% 131,110 SH
21 HELIX ENERGY SOLUTIONS GRP I HLX 42330P107 $1.1M 0.54% 124,450 SH
22 DXC TECHNOLOGY CO DXC 23355L106 $907.2K 0.45% 102,510 SH
23 OSHKOSH CORP OSK 688239201 $882.5K 0.44% 5,750 SH
24 TTEC HLDGS INC TTEC 89854H102 $495.8K 0.25% 255,555 SH
25 TECHTARGET INC TTGT 87874R308 $492.9K 0.24% 136,910 SH
26 FLUOR CORP FLR 343412102 $343.4K 0.17% 6,555 SH
27 DHI GROUP INC DHX 23331S100 $313.7K 0.16% 84,555 SH
28 ORASURE TECHNOLOGIES INC OSUR 68554V108 $247.8K 0.12% 55,555 SH
29 ARHAUS INC ARHS 04035M102 $103.7K 0.05% 12,310 SH
30 OIL STS INTL INC OIS 678026105 $92.6K 0.05% 11,555 SH
31 TALKSPACE INC TALK 87427V103 $60.1K 0.03% 11,555 SH
32 NN INC NNBR 629337106 $48.7K 0.02% 13,555 SH
33 CYTOMX THERAPEUTICS INC. CTMX 23284F105 $47.1K 0.02% 12,555 SH
34 W & T OFFSHORE INC WTI 92922P106 $42.7K 0.02% 13,555 SH
35 CONDUENT INC CNDT 206787103 $25.6K 0.01% 17,555 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-11 $201.4M 35 0001941040-26-000552
2026-03-31 2026-05-13 $201.5M 46 0001941040-26-000327
2025-12-31 2026-02-13 $206.0M 47 0001941040-26-000138
2025-09-30 2025-11-12 $234.0M 52 0001941040-25-000623
Filer Information
Address
19605 NE 8TH ST
CAMAS, WA 98607
Phone
(360) 604-8600
Filing Manager
Nierenberg Investment Management Company, LLC
Camas, WA
Signatory
Hanna Kuehl
Chief Compliance Officer