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MANGROVE PARTNERS IM, LLC — 13F Holdings & Portfolio

CIK 1535392 · latest 13F-HR filed 2026-05-15

Backtest portfolio

MANGROVE PARTNERS IM, LLC manages $1.24B in 13F-reported U.S. long-equity assets across 427 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are INDV (6.76%), ATMU (6.04%), ETH (5.71%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 261 new positions, exited 205, added to 61, and trimmed 51.

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.

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AUM

$1.24B

Long-equity book

Holdings

427

Distinct positions

Period

2026-03-31

Filed 2026-05-15

Q/Q Activity

+261 / −205 / ↑61 / ↓51

vs 2025-12-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • MILLICOM INTL CELLULAR S A$41.3M +9621.1%
  • REX AMERICAN RES CORP$13.5M +41.0%
  • COMPASS DIVERSIFIED$11.3M +63.7%
  • TRIPADVISOR INC$10.0M +3453.4%
  • ATMUS FILTRATION TECHNOLOGIE$6.4M +9.4%
Show all 61 →

Top Trims

  • ELME COMMUNITIES-$31.5M -88.4%
  • OPEN TEXT CORP-$10.2M -31.7%
  • FLYWIRE CORPORATION-$7.2M -16.9%
  • ENOVA INTL INC-$6.1M -13.6%
  • BILL HOLDINGS INC-$3.6M -10.1%
Show all 51 →

New Positions

  • INDIVIOR PHARMACEUTICALS INC$83.6M
  • GRAYSCALE ETHEREUM STAKING$70.6M
  • ONEOK INC NEW$41.7M
  • KEURIG DR PEPPER INC$35.9M
  • UNION PAC CORP$35.9M
Show all 261 →

Exited Positions

  • INDIVIOR PLC$98.5M
  • RIO TINTO PLC$79.9M
  • TEVA PHARMACEUTICAL INDS LTD$67.4M
  • ECOVYST INC$53.0M
  • BECTON DICKINSON & CO$48.0M
Show all 205 →
All Holdings

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 INDIVIOR PHARMACEUTICALS INC INDV 45579U109 $83.6M 6.76% 2,742,434 SH
2 ATMUS FILTRATION TECHNOLOGIE ATMU 04956D107 $74.7M 6.04% 1,315,227 SH
3 GRAYSCALE ETHEREUM STAKING ETH 38964R203 $70.6M 5.71% 3,552,685 SH
4 REX AMERICAN RES CORP REX 761624105 $46.3M 3.74% 1,015,234 SH
5 PG&E CORP PCG 69331C108 $42.4M 3.43% 2,413,615 SH
6 ONEOK INC NEW OKE 682680103 $41.7M 3.38% 461,743 SH
7 MILLICOM INTL CELLULAR S A TIGO L6388F110 $41.7M 3.38% 556,485 SH
8 ENOVA INTL INC ENVA 29357K103 $38.9M 3.15% 286,543 SH
9 MILLROSE PPTYS INC MRP 601137102 $38.7M 3.13% 1,380,992 SH
10 KEURIG DR PEPPER INC KDP 49271V100 $35.9M 2.91% 1,364,682 SH
11 UNION PAC CORP UNP 907818108 $35.9M 2.91% 148,098 SH
12 BIO RAD LABS INC BIO 090572207 $35.4M 2.86% 126,853 SH
13 FLYWIRE CORPORATION FLYW 302492103 $35.1M 2.84% 3,014,997 SH
14 GENUINE PARTS CO GPC 372460105 $33.5M 2.71% 316,771 SH
15 BILL HOLDINGS INC BILL 090043100 $32.1M 2.60% 838,994 SH
16 FIDELITY NATL INFORMATION SV FIS 31620M106 $30.9M 2.50% 657,673 SH
17 NEWS CORP NEW NWSA 65249B109 $29.7M 2.40% 1,191,858 SH
18 COMPASS DIVERSIFIED CODI 20451Q104 $29.0M 2.34% 3,684,800 SH
19 OPEN TEXT CORP OTEX 683715106 $22.1M 1.79% 993,199 SH
20 TRIPADVISOR INC TRIP 896945201 $10.3M 0.84% 968,658 SH
21 AXIOM INTELLIGENCE AC CORP 1 AXIN G0750N104 $9.1M 0.74% 900,000 SH
22 BITWISE SOLANA STAKING ETF BSOL 091948109 $8.5M 0.69% 766,605 SH
23 HARVARD AVE ACQUISITION CORP HAVA G4330A103 $7.4M 0.60% 740,600 SH
24 CIA ENERGETICA DE MINAS GERA CIG 204409601 $6.3M 0.51% 2,625,000 SH
25 CLEARTHINK 1 ACQUISITION COR CTAAU G2294A127 $6.0M 0.49% 605,000 SH
26 K2 CAP ACQUISITION CORP KTWO G5226B105 $5.8M 0.47% 590,000 SH
27 VOYAGER ACQUISITION CORP VACH G93A7H104 $5.4M 0.44% 450,000 SH
28 EMMIS ACQUISITION CORP. EMIS G3037D105 $5.0M 0.41% 500,000 SH
29 LIGHTWAVE ACQUISITION CORP LWAC G5490M100 $5.0M 0.40% 486,900 SH
30 K&F GROWTH ACQUISITION CORP KFII G52258111 $4.7M 0.38% 450,000 SH
31 DUNE ACQUISITION CORP II IPOD G2867S109 $4.6M 0.38% 449,995 SH
32 COPLEY ACQUISITION CORP COPL G24243100 $4.6M 0.38% 450,000 SH
33 SIZZLE ACQUISITION CORP. II SZZL G8193F109 $4.6M 0.37% 450,000 SH
34 FACT II ACQUISITION CORP FACT G32901103 $4.6M 0.37% 438,966 SH
35 THAYER VENTURES ACQ CORP II TVAI G87890102 $4.6M 0.37% 450,000 SH
36 INDIGO ACQUISITION CORP INAC G4791J106 $4.6M 0.37% 450,000 SH
37 SILVER PEGASUS ACQUISITION C SPEG G8192J102 $4.6M 0.37% 450,000 SH
38 OYSTER ENTERPRISES II ACQUIS OYSE G6861F104 $4.6M 0.37% 450,000 SH
39 A PARADISE ACQUISITION CORP APAD G04819101 $4.6M 0.37% 450,000 SH
40 PIONEER ACQUISITION I CORP PACH G7117W107 $4.6M 0.37% 450,000 SH
41 RF ACQUISITION CORP III RFAM G7537X107 $4.6M 0.37% 465,000 SH
42 VENDOME ACQUISITION CORP I VNME G9580A109 $4.5M 0.37% 450,000 SH
43 GIGCAPITAL9 CORP GIXXU G3865B106 $4.5M 0.37% 450,000 SH
44 AI INFRASTRUCTURE ACQUISI AIIA G01336109 $4.5M 0.37% 450,000 SH
45 SUMA ACQUISITION CORP SUMAU G8557R129 $4.5M 0.36% 450,000 SH
46 GALATA ACQUISITION CORP II LATA G3R25N108 $4.5M 0.36% 450,000 SH
47 PONO CAP FOUR INC PONOU G71702123 $4.5M 0.36% 450,000 SH
48 SC II ACQUISITION CORP SCII G7866D102 $4.5M 0.36% 450,000 SH
49 XFLH CAP CORP XFLH.U G9834D123 $4.5M 0.36% 450,000 SH
50 INVEST GREEN ACQUISITION COR IGAC G4924G102 $4.5M 0.36% 450,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-03-31 2026-05-15 $1.24B 427 0001172661-26-002101
2025-12-31 2026-02-17 $1.23B 371 0001172661-26-000828
2025-09-30 2025-11-14 $1.35B 178 0001172661-25-004806