Top Institutional Investors

Weiss Asset Management LP — 13F Holdings & Portfolio

CIK 1357550 · latest 13F-HR filed 2026-08-14

Backtest portfolio

Weiss Asset Management LP manages $9.54B in 13F-reported U.S. long-equity assets across 624 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are NVDA (11.04%), MU (9.00%), SMCIP (2.61%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 613 new positions, exited 1, added to 0, and trimmed 0.

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.

Filer Information
Address
222 BERKELEY STREET, 16TH FLOOR
BOSTON, MA 02116
Phone
(617) 778-7780
Filing Manager
Weiss Asset Management LP
BOSTON, MA
Signatory
Georgiy Nikitin
Chief Compliance Officer
Loading holdings…
AUM

$9.54B

Long-equity book

Holdings

624

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+613 / −1 / ↑0 / ↓0

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • No increased positions.
Show all 0 →

Top Trims

  • No decreased positions.
Show all 0 →

New Positions

  • NVIDIA CORPORATION$1.05B
  • MICRON TECHNOLOGY INC$858.5M
  • SUPER MICRO COMPUTER INC$249.1M
  • SUPER MICRO COMPUTER INC$245.6M
  • SUPER MICRO COMPUTER INC$212.0M
Show all 613 →

Exited Positions

  • ENVIRI CORP$27.5M
Show all 1 →
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 NVIDIA CORPORATION NVDA 67066G104 $1.05B 11.04% 5,263,485 SH
2 MICRON TECHNOLOGY INC MU 595112103 $858.5M 9.00% 743,769 SH
3 SUPER MICRO COMPUTER INC SMCIP 86800U500 $249.1M 2.61% 4,850,000 SH
4 SUPER MICRO COMPUTER INC SMCI 86800UAD6 $245.6M 2.57% 249,862,000 PRN
5 SUPER MICRO COMPUTER INC SMCI 86800UAB0 $212.0M 2.22% 230,956,000 PRN
6 SUPER MICRO COMPUTER INC Put SMCI 86800U302 $206.7M 2.17% 7,046,400 SH
7 NVIDIA CORPORATION Put NVDA 67066G104 $200.1M 2.10% 1,000,000 SH
8 TESLA INC TSLA 88160R101 $191.6M 2.01% 455,491 SH
9 BOEING CO BAPA 097023204 $188.3M 1.97% 2,775,000 SH
10 STRATEGY INC MHIFF 594972AJ0 $181.9M 1.91% 177,857,000 PRN
11 NEXTERA ENERGY INC NEEPV 65339F655 $129.4M 1.36% 2,697,000 SH
12 THERAVANCE BIOPHARMA INC TBPH G8807B106 $126.8M 1.33% 7,457,060 SH
13 SPROTT ASSET MANAGEMENT LP CEF 85208R101 $124.7M 1.31% 3,099,716 SH
14 MICRON TECHNOLOGY INC Put MU 595112103 $121.2M 1.27% 105,000 SH
15 STRATEGY INC MHIFF 594972AN1 $117.4M 1.23% 121,252,000 PRN
16 SUPER MICRO COMPUTER INC SMCI 86800UAF1 $111.1M 1.16% 125,427,000 PRN
17 ROBINHOOD MKTS INC HOOD 770700102 $109.4M 1.15% 1,090,686 SH
18 ENTREPRENEURSHARES SERIES TR XOVR 293828877 $107.3M 1.12% 5,097,483 SH
19 ALBEMARLE CORP ALBPA 012653200 $105.9M 1.11% 1,910,000 SH
20 STRATEGY INC MHIFF 594972AQ4 $102.8M 1.08% 100,165,000 PRN
21 STRATEGY INC MHIFF 594972AL5 $98.7M 1.03% 106,875,000 PRN
22 ROIVANT SCIENCES LTD ROIV G76279101 $90.0M 0.94% 2,542,652 SH
23 HEWLETT PACKARD ENTERPRISE C HPEPC 42824C208 $87.4M 0.92% 750,000 SH
24 STRATEGY INC MHIFF 594972AU5 $86.4M 0.91% 97,266,000 PRN
25 SPACE EXPLORATION TECHN CORP SPCX 84615Q103 $86.0M 0.90% 503,225 SH
26 MARVELL TECHNOLOGY INC MRVL 573874104 $85.3M 0.89% 286,219 SH
27 UGI CORP NEW UGI 902681AB1 $80.7M 0.85% 60,240,000 PRN
28 TOPBUILD COR COR 89055F103 $79.8M 0.84% 225,000 SH
29 VISHAY INTERTECHNOLOGY INC VSH 928298AR9 $78.1M 0.82% 39,339,000 PRN
30 ENVISTA HOLDINGS CORPORATION NVST 29415FAD6 $77.2M 0.81% 77,224,000 PRN
31 TETRA TECH INC NEW TTEK 88162GAB9 $72.1M 0.76% 68,289,000 PRN
32 GREENBRIER COS INC GBX 393657AM3 $70.8M 0.74% 61,697,000 PRN
33 FRESHPET INC FRPT 358039AB1 $67.0M 0.70% 57,456,000 PRN
34 MCEWEN INC. MUX 58039PAB3 $60.2M 0.63% 31,300,000 PRN
35 UNITED AIRLS HLDGS INC UAL 910047109 $57.8M 0.61% 425,223 SH
36 STRATEGY INC MSTR 594972408 $54.8M 0.57% 629,895 SH
37 EPR PPTYS EPRPC 26884U208 $53.4M 0.56% 2,067,831 SH
38 SPROTT ASSET MANAGEMENT LP PSLV 85207K107 $52.9M 0.55% 2,801,789 SH
39 MERIT MED SYS INC MMSI 589889AB0 $50.8M 0.53% 47,137,000 PRN
40 MOONLAKE IMMUNOTHERAPEUTICS MLTX 61559X104 $50.3M 0.53% 2,581,813 SH
41 FIRSTENERGY CORP FE 337932AV9 $48.9M 0.51% 44,000,000 PRN
42 SPROTT ASSET MANAGEMENT LP PHYS 85207H104 $48.6M 0.51% 1,611,647 SH
43 APOLLO GLOBAL MGMT INC APO 03769M304 $47.2M 0.49% 775,000 SH
44 ISHARES BITCOIN TRUST ETF IBIT 46438F101 $46.6M 0.49% 1,400,417 SH
45 MICROCHIP TECHNOLOGY INC. MCHPP 595017302 $46.1M 0.48% 600,000 SH
46 CHEVRON CORPORATION CVX 166764100 $45.1M 0.47% 271,962 SH
47 GAMESTOP CORP GME 36467WAG4 $44.6M 0.47% 44,000,000 PRN
48 BITMINE IMMERSION TECHS INC BMNR 09175A206 $41.8M 0.44% 3,142,727 SH
49 VERTEX INC VRTX 92538JAB2 $36.9M 0.39% 41,211,000 PRN
50 PPL CORP PPLC 69351T866 $35.7M 0.37% 730,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $9.54B 624 0001357550-26-000029
2026-03-31 2026-05-15 $5.91B 488 0001357550-26-000023
2026-03-31 2026-08-14 $27.5M 1 0001357550-26-000028
2025-12-31 2026-02-17 $7.14B 561 0001357550-26-000011
2025-12-31 2026-05-15 $432.0M 5 0001357550-26-000022
2025-09-30 2026-02-17 $286.5M 3 0001357550-26-000009