Stocks/Funds/CIK 1357550

Weiss Asset Management LP

Quarterly 13F filings · Latest period 2026-03-31 · CIK 1357550
Assets
$4.24B
+58.0% YoY
Holdings
444
Lifetime alpha vs market
+11.63% annual
Average hold time
1.0 yr
median 0.8 yr

Quarterly history

Cum return +415% vs S&P +145% · α +270% lifetimeAUM $4.2B · peak $5.7BFlow $-1.3B (-22%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-14.19%
trims when stocks drop
when a holding falls −10%+
Middle response
-10.91%
baseline attrition
Rally response
-23.64%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
NVDANVIDIA Corporation$973M22.9%+60.9%2.8 yr
PSLVSprott Physical Silver T$200M4.7%1.3 yr
$128M3.0%0.3 yr
TBPHTheravance Biopharma, In$121M2.9%+81.7%4.5 yr
HOLXHologic, Inc.$93M2.2%+22.4%1.3 yr
IBITiShares Bitcoin Trust ET$88M2.1%1.8 yr
BMNRBitmine Immersion Techno$86M2.0%0.5 yr
MSTRStrategy Inc$83M2.0%-56.7%1.5 yr
CEFSprott Physical Gold and$83M2.0%1.8 yr
$59M1.4%1.0 yr
FOLDAmicus Therapeutics, Inc$56M1.3%+77.2%0.5 yr
TSLATesla, Inc.$48M1.1%+43.4%2.8 yr
PPLCPPL Corporation Corporat$47M1.1%0.3 yr
EPR-PCEPR Properties$47M1.1%2.3 yr
LMTLockheed Martin Corporat$37M0.9%+39.0%1.0 yr

Portfolio composition (YoY)

Industry mix
Semiconductors25.1%+9.8pp$1.07B
Asset Management11.0%+5.2pp$467M
Unknown7.8%+6.5pp$330M
Biotechnology7.3%+4.0pp$311M
Financial - Capital Markets4.2%+3.9pp$178M
Software - Application4.1%-9.8pp$175M
Medical - Instruments & Supplies2.6%+2.4pp$112M
Computer Hardware2.5%-0.2pp$104M
Regulated Electric2.0%+0.3pp$85M
REIT - Specialty1.9%+1.5pp$81M
Country
US76.0%-18.8pp
CA8.5%+8.2pp
Unknown7.8%+6.5pp
KY2.9%+0.4pp
IL0.9%
CH0.9%
AU0.6%+0.6pp
GB0.5%+0.5pp
Top 5: 35.7% · Top 10: 45.1% · Top 25: 57.9%

Winners

TickerPrev $PnLYoY %
NVDA$341M+0.21B60.9%
TBPH$67M+0.05B81.7%
TSLA$122M+0.05B43.4%
MU$2M+0.00B289.6%
KKR$0M-0.00B-19.5%

Losers

TickerPrev $PnLYoY %
MSTR$351M-0.20B-56.7%
SMCI$59M-0.02B-33.5%
KKR$0M-0.00B-19.5%

Top buys this quarter · 15

HOLX Hologic, Inc.+$79M
BMNR Bitmine Immersion Technologies+$67M
PPLC PPL Corporation Corporate Unitnew+$47M
KMB Kimberly-Clark Corporation+$32M
FOLD Amicus Therapeutics, Inc.+$29M
APLS Apellis Pharmaceuticals, Inc.+$28M
KKR KKR & Co. Inc.+$27M
MLTX MoonLake Immunotherapeutics+$26M
CLBT Cellebrite DI Ltd.+$25M
LMT Lockheed Martin Corporation+$25M

Top sells this quarter · 15

NVDA NVIDIA Corporation$185M
EXAS Exact Sciences Corporationexit$88M
KVUE Kenvue Inc.exit$84M
LIN Linde plcexit$74M
EQIX Equinix, Inc.exit$71M
ADP Automatic Data Processing, Incexit$65M
PFG Principal Financial Group, Incexit$55M
COP ConocoPhillips$49M
GILD Gilead Sciences, Inc.exit$48M
DVN Devon Energy Corporationexit$43M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$4.24B444+17.02%+17.59%-0.57%-1.25B
2025-12-31$5.62B521+17.90%+17.72%+0.18%+0.09B
2025-09-30$5.68B561+23.78%+17.52%+6.26%-0.02B
2025-06-30$5.40B378+23.91%+14.94%+8.97%+2.27B
2025-03-31$2.68B268+5.80%+8.30%-2.51%-0.67B
2024-12-31$3.41B573+14.94%+24.89%-9.94%+0.45B
2024-09-30$2.89B545+28.13%+36.04%-7.90%+1.36B
2024-06-30$1.46B230+10.42%+24.49%-14.07%-0.33B
2024-03-31$1.80B261+15.46%+29.62%-14.16%+0.94B
2023-12-31$802M319+15.65%+26.18%-10.53%-0.44B
2023-09-30$1.09B147+0.95%+21.57%-20.62%+0.50B
2023-06-30$655M187+131.66%+19.42%+112.23%-0.29B
2023-03-31$908M296+97.03%-7.82%+104.85%-0.95B
2022-12-31$1.74B497+75.32%-18.17%+93.49%-1.97B
2022-09-30$3.73B635+95.89%-15.51%+111.39%-3.04B
2022-06-30$3.24B608-5.73%-10.62%+4.89%-0.18B