13F Insight
DOSSIER · 13F-HR · Q1 2026

MANGROVE PARTNERS IM, LLC

$1.2B in tracked AUM across 427 positions as of Q1 2026.

MP
CIK 0001535392 · last filed Mar 31, 2026
Total AUM
$1.2B
as of Q1 2026
Holdings
427
—
positions
Whale Score
59
59
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026
Comprehensive Analysis of Mangrove Partners IM, LLC SEC 13F Filing
Portfolio Overview

Mangrove Partners IM, LLC reported a significant portfolio contraction for the quarter ended September 30, 2025. The total portfolio value decreased by 12.6%, falling from $931.33 million to $813.93 million. This reduction in assets under management (AUM) is likely driven by a combination of market performance and substantial capital reallocation, evidenced by the high turnover in holdings. The fund c...

Key Holdings

The portfolio exhibits a high concentration of capital in its top positions, suggesting a high-conviction investment style. The top three holdings account for approximately 34% of the total portfolio value:

  1. ECD Automotive Design Inc (18.52%): This is the dominant position, valued at $150.76 million. Its status as a new position this quarter indicates a major strategic bet by the firm, likely representing a perceived deep-value or special situation opportunity.
  2. Indivior PLC (8.12%): Valued at $66.12 million, this is the second-largest holding. The firm significantly increased its stake by 20.7% (adding $32.62 million), signaling strong confidence in the healthcare company's outlook.
  3. Atmus Filtration Technologies (7.37%): A consumer cyclical holding valued at $59.99 million. The position was increased by 21% this quarter, reinforcing its importance in the portfolio.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
45579U109
INDIVIOR PHARMACEUTICALS INC
$84M2.7M6.8%02
ATMU
ATMUS FILTRATION TECHNOLOGIE
$75M1.3M6.0%03
ETH
GRAYSCALE ETHEREUM STAKING
$71M3.6M5.7%04
REX
REX AMERICAN RES CORP
$46M1.0M3.7%05
PCG
PG&E CORP
$42M2.4M3.4%06
OKE
ONEOK INC NEW
$42M462K3.4%07
L6388F110
MILLICOM INTL CELLULAR S A
$42M556K3.4%08
ENVA
ENOVA INTL INC
$39M287K3.1%09
MRP
MILLROSE PPTYS INC
$39M1.4M3.1%10
KDP
KEURIG DR PEPPER INC
$36M1.4M2.9%

Filing history

2026Q1Mar 31
$1.2B▲ 0.7%
427 positionsView →2025Q4Dec 31
$1.2B▲ 50.8%
371 positionsView →2025Q3Sep 30
$814M▼ 12.6%
116 positionsView →2025Q2Jun 30
$931M▲ 94.1%
154 positionsLocked2025Q1Mar 31
$480M▼ 47.0%
103 positionsLocked2024Q4Dec 31
$905M▼ 22.2%
154 positionsLocked2024Q3Sep 30
$1.2B▼ 10.8%
161 positionsLocked2024Q2Jun 30
$1.3B▼ 9.3%
142 positionsLocked2024Q1Mar 31
$1.4B▼ 2.8%
163 positionsLocked2023Q4Dec 31
$1.5B▲ 11.7%
176 positionsLocked2023Q3Sep 30
$1.3B▼ 8.1%
167 positionsLocked2023Q2Jun 30
$1.4B▼ 5.4%
217 positionsLocked
Showing 12 of 51