Top Institutional Investors

Engine Capital Management, LP — 13F Holdings & Portfolio

CIK 1665590 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Engine Capital Management, LP manages $1.03B in 13F-reported U.S. long-equity assets across 29 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are AVTR (19.13%), NATL (10.91%), BCO (6.96%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 9 new positions and exited 6; 13 existing positions rose in reported value and 2 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
$1.03B

Long-equity book

Holdings
29

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+9 / −6 / ↑13 / ↓2

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
AVTR19.1% · +0%NATL10.9% · 0%BCO7.0% · +38%DNOW6.5% · +0%EYE6.5% · +36815%KBR6.2% · +21%SPSC5.1% · newPRKS4.6% · -5%OFIX4.1% · +4%NXST3.5% · 0%FOXF3.4% · +3%HONA2.6% · newMAGN2.6% · 0%CVEO2.3% · -22%FUL2.3% · newCMP1.9% · -56%PRIM1.9% · newSONO1.7% · 0%PHIN1.4% · 0%FVRR1.3% · 0%IWM1.2% · 0%BVS0.8% · +186%AOUT0.8% · 0%CBZ0.6% · newWEAV0.6% · 0%CCC0.5% · newUBER0.4% · newNIQ0.1% · newTRIP0.0% · 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 = 73.5%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated May 5, 2026.

Assets Under Management
$1.73B
Discretionary
$1.73B
Employees
7
Accounts
8
Address
1345 AVENUE OF THE AMERICAS
2ND FLOOR
NEW YORK, NY 10105
Phone
(646) 392-8863
Website
Name Title / Status Ownership Type
AJDLER, ARNAUD ControlMANAGER
since Feb 2018
75% or moreIndividual
DIAGONALE, MARC, STEPHEN ControlCHIEF FINANCIAL OFFICER/CHIEF COMPLIANCE OFFICER
since Feb 2018
Less than 5%Individual
ENGINE CAPITAL MANAGEMENT GP, LLC ControlGENERAL PARTNER
since Feb 2018
Less than 5%Domestic Entity
AJDLER, ARNAUD Control
Indirect owner via ENGINE CAPITAL MANAGEMENT GP, LLC
OWNER
since Feb 2018
75% or moreIndividual
Ownership & leadership changes · 6 filings with changes since Jun 20, 2013

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.

Mar 26, 2024 filing
  • AddedAJDLER, ARNAUD · OWNER · 75% or more · indirect via ENGINE CAPITAL MANAGEMENT GP, LLC · control person
Mar 23, 2023 filing
  • AddedENGINE CAPITAL MANAGEMENT GP, LLC · GENERAL PARTNER · Less than 5% · control person
Jun 10, 2019 filing
  • ChangedAJDLER, ARNAUD · ownership Less than 5% → 75% or more
Mar 29, 2019 filing
  • ChangedAJDLER, ARNAUD · title MANAGING MEMBER → MANAGER; ownership 75% or more → Less than 5%
Jun 9, 2014 filing
  • No longer listedMCCORMICK, EDWARD, JOSEPH · CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICER, MANAGING DIRECTOR · Less than 5% · control person · listed since Jul 2013
  • AddedDIAGONALE, MARC, STEPHEN · CHIEF FINANCIAL OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Mar 31, 2014 filing
  • AddedMCCORMICK, EDWARD, JOSEPH · CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICER, MANAGING DIRECTOR · Less than 5% · control person
Jun 20, 2013 filing (earliest on record)
  • ListedAJDLER, ARNAUD · MANAGING MEMBER · 75% or more · 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 13 →

Top Trims

Show all 2 →

New Positions

Show all 9 →

Exited Positions

Show all 6 →

Engine Capital Management, LP 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 AVANTOR INC AVTR 05352A100 $196.6M 19.13% 19,860,830 SH
2 NCR ATLEOS CORPORATION NATL 63001N106 $112.1M 10.91% 2,581,525 SH
3 BRINKS CO BCO 109696104 $71.5M 6.96% 756,435 SH
4 DNOW INC DNOW 67011P100 $67.0M 6.52% 5,169,462 SH
5 NATIONAL VISION HLDGS INC EYE 63845R107 $66.9M 6.51% 3,520,944 SH
6 KBR INC KBR 48242W106 $64.1M 6.24% 1,855,642 SH
7 SPS COMM INC SPSC 78463M107 $52.4M 5.10% 916,380 SH
8 UNITED PARKS & RESORTS INC PRKS 81282V100 $47.0M 4.57% 983,600 SH
9 ORTHOFIX MED INC OFIX 68752M108 $41.8M 4.07% 4,575,675 SH
10 NEXSTAR MEDIA GROUP INC NXST 65336K103 $35.6M 3.46% 199,247 SH
11 FOX FACTORY HLDG CORP FOXF 35138V102 $35.4M 3.44% 2,087,363 SH
12 HONEYWELL AEROSPACE INC HONA 43849R105 $26.5M 2.58% 120,000 SH
13 MAGNERA CORP MAGN 55939A107 $26.4M 2.57% 2,243,827 SH
14 CIVEO CORP CDA CVEO 17878Y207 $24.0M 2.34% 686,315 SH
15 FULLER H B CO FUL 359694106 $23.6M 2.30% 405,349 SH
16 COMPASS MINERALS INTL INC CMP 20451N101 $19.7M 1.92% 633,021 SH
17 PRIMORIS SVCS CORP PRIM 74164F103 $19.4M 1.89% 195,838 SH
18 SONOS INC SONO 83570H108 $17.0M 1.65% 1,256,060 SH
19 PHINIA INC PHIN 71880K101 $14.1M 1.37% 170,622 SH
20 FIVERR INTL LTD FVRR M4R82T106 $13.8M 1.34% 1,338,644 SH
21 ISHARES TR IWM 464287655 $12.8M 1.24% 42,444 SH
22 BIOVENTUS INC BVS 09075A108 $8.5M 0.83% 900,558 SH
23 AMERICAN OUTDOOR BRANDS INC AOUT 02875D109 $7.7M 0.75% 656,329 SH
24 CBIZ INC CBZ 124805102 $6.5M 0.63% 201,998 SH
25 WEAVE COMMUNICATIONS INC WEAV 94724R108 $6.3M 0.61% 1,051,525 SH
26 CCC INTELLIGENT SOLUTIONS HL CCC 12510Q100 $4.9M 0.48% 949,332 SH
27 UBER TECHNOLOGIES INC UBER 90353T100 $4.3M 0.42% 60,000 SH
28 NIQ GLOBAL INTELLIGENCE PLC NIQ G63755105 $1.5M 0.14% 159,134 SH
29 TRIPADVISOR INC TRIP 896945201 $274.2K 0.03% 20,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $1.03B 29 0001665590-26-000006
2026-03-31 2026-05-15 $828.4M 26 0001665590-26-000004
2025-12-31 2026-02-17 $724.2M 28 0001665590-26-000002
2025-09-30 2025-11-14 $842.2M 27 0001665590-25-000014
Filer Information
Address
1345 AVENUE OF THE AMERICAS, 2ND FLOOR
NEW YORK, NY 10105
Phone
(646) 392-8863
Filing Manager
Engine Capital Management, LP
NEW YORK, NY
Signatory
Marc Diagonale
Chief Financial Officer/Chief Compliance Officer