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Melqart Asset Management (UK) Ltd — 13F Holdings & Portfolio

CIK 1712901 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Melqart Asset Management (UK) Ltd manages $1.05B in 13F-reported U.S. long-equity assets across 40 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are WBD (11.63%), TXNM (7.40%), NSC (7.27%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 14 new positions and exited 15; 17 existing positions rose in reported value and 7 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.

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AUM
$1.05B

Long-equity book

Holdings
40

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+14 / −15 / ↑17 / ↓7

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
WBD11.6% · +126%TXNM7.4% · +30%NSC7.3% · +51%EA7.0% · -4%CYTK6.2% · -9%PEN5.6% · +127%GTLS4.3% · -19%ABVX3.9% · newGPN3.7% · +24%AES2.9% · +129%AMD2.6% · -33%ASML2.4% · -32%NVDA2.4% · -49%INDV2.3% · -14%RVMD2.2% · -55%UNF2.1% · +15%TSM1.9% · -63%CZR1.9% · newAMZN1.5% · newAPGE1.5% · newTWO1.4% · +219%MRVL1.3% · -81%LRCX1.3% · newSNDK1.3% · -88%ANET1.3% · newSIMO1.2% · -30%URA1.2% · +20%AEVA1.2% · -15%ARES1.1% · newAXTA1.1% · -62%STX1.1% · newCMBT1.1% · +99%RTAC0.8% · +16%CPRX0.7% · newTSEM0.6% · newAVTR0.6% · newSTM0.6% · newMCHP0.6% · newIHRT0.4% · -10%FPS0.3% · 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

5 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 = 59.8%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Feb 25, 2026.

Assets Under Management
$2.87B
Discretionary
$2.87B
Employees
23
Accounts
4
Address
5 ST. JAMES'S SQUARE
LONDON SW1Y 4JU
United Kingdom
Phone
44 2038264470
Website
This firm reports 1 disclosure item on its registration.
Name Title / Status Ownership Type
FULLERTON, ELAINE, MARIE ControlCHIEF COMPLIANCE OFFICER, GENERAL COUNSEL
since May 2025
Less than 5%Individual
HORNZEE, ADRIAN, GRANT ControlCHIEF OPERATING OFFICER
since Dec 2024
Less than 5%Individual
MASSOUD, MICHEL, NMN ControlDIRECTOR, CHIEF EXECUTIVE OFFICER
since Mar 2015
Less than 5%Individual
MELQART ASSET MANAGEMENT LP ControlOWNER
since Mar 2015
75% or moreForeign Entity
MASSOUD, MICHEL, NMN Control
Indirect owner via MOPAR HOLDING LTD
OWNER
since Mar 2015
75% or moreIndividual
MELQART ASSET MANAGEMENT (GP) LTD. Control
Indirect owner via MELQART ASSET MANAGEMENT LP
GP
since Mar 2015
General partner, trustee or managerForeign Entity
MOPAR HOLDING LTD Control
Indirect owner via MELQART ASSET MANAGEMENT LP
OWNER
since Feb 2015
75% or moreForeign Entity
Ownership & leadership changes · 5 filings with changes since Apr 20, 2017

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.

May 16, 2025 filing
  • No longer listedVERSTEEG, JULIAN, DAVID · CHIEF COMPLIANCE OFFICER, GENERAL COUNSEL · Less than 5% · control person · listed since Feb 2024
  • AddedFULLERTON, ELAINE, MARIE · CHIEF COMPLIANCE OFFICER, GENERAL COUNSEL · Less than 5% · control person
Feb 28, 2024 filing
  • AddedHORNZEE, ADRIAN, GRANT · CHIEF OPERATING OFFICER · Less than 5% · control person
  • AddedVERSTEEG, JULIAN, DAVID · CHIEF COMPLIANCE OFFICER, GENERAL COUNSEL · Less than 5% · control person
  • ChangedMASSOUD, MICHEL, NMN · title DIRECTOR, CHIEF COMPLIANCE OFFICER, CHIEF EXECUTIVE OFFICER → DIRECTOR, CHIEF EXECUTIVE OFFICER
Oct 20, 2023 filing
  • No longer listedPLATTS, JOHN, STEPHEN · DIRECTOR, CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Mar 2015
  • ChangedMASSOUD, MICHEL, NMN · title DIRECTOR → DIRECTOR, CHIEF COMPLIANCE OFFICER, CHIEF EXECUTIVE OFFICER
Jun 28, 2022 filing
  • ChangedPLATTS, JOHN, STEPHEN · title DIRECTOR → DIRECTOR, CHIEF COMPLIANCE OFFICER
Feb 28, 2019 filing
  • No longer listedMELQART (GP) LTD · GP · General partner, trustee or manager · indirect via MELQART ASSET MANAGEMENT LP · control person · listed since Mar 2015
  • AddedMELQART ASSET MANAGEMENT (GP) LTD. · GP · General partner, trustee or manager · indirect via MELQART ASSET MANAGEMENT LP · control person
  • ChangedMELQART ASSET MANAGEMENT LP · title CORPORATE PARTNER → OWNER
Apr 20, 2017 filing (earliest on record)
  • ListedMASSOUD, MICHEL, NMN · DIRECTOR · Less than 5% · control person
  • ListedMASSOUD, MICHEL, NMN · OWNER · 75% or more · indirect via MOPAR HOLDING LTD · control person
  • ListedMELQART (GP) LTD · GP · General partner, trustee or manager · indirect via MELQART ASSET MANAGEMENT LP · control person
  • ListedMELQART ASSET MANAGEMENT LP · CORPORATE PARTNER · 75% or more · control person
  • ListedMOPAR HOLDING LTD · OWNER · 75% or more · indirect via MELQART ASSET MANAGEMENT LP · control person
  • ListedPLATTS, JOHN, STEPHEN · DIRECTOR · 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 17 →

Top Trims

Show all 7 →

New Positions

Show all 14 →

Exited Positions

Show all 15 →

Melqart Asset Management (UK) Ltd 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 WARNER BROS DISCOVERY INC WBD 934423104 $122.2M 11.63% 4,583,750 SH
2 TXNM ENERGY INC TXNM 69349H107 $77.8M 7.40% 1,370,244 SH
3 NORFOLK SOUTHN CORP NSC 655844108 $76.4M 7.27% 242,944 SH
4 ELECTRONIC ARTS INC EA 285512109 $73.0M 6.95% 356,261 SH
5 CYTOKINETICS INC CYTK 23282W605 $65.4M 6.22% 767,525 SH
6 PENUMBRA INC PEN 70975L107 $58.6M 5.58% 185,734 SH
7 CHART INDS INC GTLS 16115Q308 $44.8M 4.27% 214,647 SH
8 ABIVAX SA ABVX 00370M103 $40.9M 3.90% 307,250 SH
9 GLOBAL PMTS INC GPN 37940X102 $38.7M 3.68% 532,688 SH
10 AES CORP AES 00130H105 $30.8M 2.93% 2,103,152 SH
11 ADVANCED MICRO DEVICES INC AMD 007903107 $27.3M 2.60% 46,971 SH
12 ASML HLDG NV ASML N07059210 $25.5M 2.43% 12,824 SH
13 NVIDIA CORPORATION NVDA 67066G104 $24.9M 2.37% 124,402 SH
14 INDIVIOR PHARMACEUTICALS INC INDV 45579U109 $24.0M 2.29% 585,664 SH
15 REVOLUTION MEDICINES INC RVMD 76155X100 $22.7M 2.16% 121,308 SH
16 UNIFIRST CORP MASS UNF 904708104 $22.4M 2.14% 84,865 SH
17 TAIWAN SEMICONDUCTOR MANUFAC TSM 874039100 $20.5M 1.95% 42,903 SH
18 CAESARS ENTERTAINMENT INC NE CZR 12769G100 $20.1M 1.91% 665,410 SH
19 AMAZON COM INC AMZN 023135106 $16.2M 1.55% 68,122 SH
20 APOGEE THERAPEUTICS INC APGE 03770N101 $15.6M 1.48% 117,249 SH
21 TWO HARBORS INVENTMENT CORPO TWO 90187B804 $14.9M 1.42% 1,201,262 SH
22 MARVELL TECHNOLOGY INC MRVL 573874104 $13.7M 1.31% 46,079 SH
23 LAM RESEARCH CORP LRCX 512807306 $13.4M 1.28% 30,961 SH
24 SANDISK CORP SNDK 80004C200 $13.4M 1.27% 5,874 SH
25 ARISTA NETWORKS INC ANET 040413205 $13.3M 1.26% 78,123 SH
26 SILICON MOTION TECHNOLOGY CO SIMO 82706C108 $12.9M 1.23% 38,828 SH
27 GLOBAL X FDS URA 37954Y871 $12.9M 1.22% 294,245 SH
28 AEVA TECHNOLOGIES INC AEVA 00835Q202 $12.8M 1.21% 444,102 SH
29 ARES MANAGEMENT CORPORATION ARES 03990B101 $12.0M 1.14% 107,896 SH
30 AXALTA COATING SYS LTD AXTA G0750C108 $11.8M 1.13% 346,041 SH
31 SEAGATE TECHNOLOGY HLDNGS PL STX G7997R103 $11.7M 1.11% 12,107 SH
32 CMB.TECH NV CMBT B38564108 $11.6M 1.11% 830,385 SH
33 RENATUS TACTICAL ACQUIS RTAC G7490F101 $8.4M 0.80% 802,884 SH
34 CATALYST PHARMACEUTICALS INC CPRX 14888U101 $7.8M 0.74% 247,556 SH
35 TOWER SEMICONDUCTOR LTD TSEM M87915274 $6.5M 0.62% 24,811 SH
36 AVANTOR INC AVTR 05352A100 $6.3M 0.60% 635,800 SH
37 STMICROELECTRONICS N V STM 861012102 $6.1M 0.58% 80,853 SH
38 MICROCHIP TECHNOLOGY INC. MCHP 595017104 $6.0M 0.57% 65,676 SH
39 IHEARTMEDIA INC IHRT 45174J509 $3.7M 0.36% 873,806 SH
40 FORGENT POWER SOLUTIONS INC FPS 34631F102 $3.7M 0.35% 65,574 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $1.05B 40 0001172661-26-003634
2026-03-31 2026-05-12 $1.01B 41 0001172661-26-001681
2025-12-31 2026-02-17 $1.02B 45 0001172661-26-000839
2025-09-30 2025-11-14 $749.5M 44 0001172661-25-004813
2020-03-31 2020-05-15 $1.01B 39 0001172661-20-001339
Filer Information
Address
5 ST JAMES'S SQUARE
LONDON, X0 SW1Y 4JU
Phone
00442038264470
Filing Manager
Melqart Asset Management (UK) Ltd
London, X0
Signatory
Ben Sharp
Head of Finance & Treasury