Weiss Asset Management LP
Weiss Asset Management LP is a private investment firm based in Boston, Massachusetts, established as a Delaware limited partnership. The firm is led by Andrew M. Weiss, Ph.D. and acts as investment manager to multiple private investment partnerships. It primarily serves institutional investors and high-net-worth clients through its global investment strategies spanning equities, fixed income, and alternative asset classes. Although the exact founding year is not available, the firm's regulatory filings suggest it has operated since at least the mid-2000s. Employee count is not publicly stated.
Investment Strategy
Weiss Asset Management LP focuses on quantitative and value-driven strategies across global developed and emerging markets, often identifying inefficiencies or mispricings through rigorous research and modeling. The firm leverages both systematic and discretionary investment approaches targeting a diverse range of asset classes, with risk management and capital preservation as central pillars of its philosophy.
Latest 13F Filing Activity
Weiss Asset Management LP filed their most recent 13F report on Jun 30, 2025 disclosing 347 equity positions and 14 options positions with a total 13F market value of $9B. The fund increased holdings in Nvidia Corporation, Microstrategy Inc., Ishares Bitcoin Trust Etf among other positions. Weiss Asset Management LP reduced exposure to Intra-cellular Therapies Inc., Tesla Inc., Ametek Inc. among others.
Top Holdings
Equity Positions (347)
| Ticker | Security | Weight | Market Value | Shares | Avg Cost | Price | Change (QoQ) |
|---|---|---|---|---|---|---|---|
N NVDA | NVIDIA CORPORATION | 10.66% | $923.2M | 5,843,559 | $131.94 | $157.99 | +$582.3M |
M MSTR | MICROSTRATEGY INC | 10.31% | $892.9M | 2,208,879 | $340.45 | $404.23 | +$542.3M |
I IBIT | ISHARES BITCOIN TRUST ETF | 5.10% | $441.8M | 7,217,838 | $58.67 | $61.21 | +$342.8M |
C COIN | COINBASE GLOBAL INC | 2.48% | $214.8M | 612,743 | $314.77 | $350.49 | +$190.1M |
S SMCI | SUPER MICRO COMPUTER INC | 1.90% | $164.9M | 3,363,687 | $41.38 | $49.01 | +$105.4M |
Options Positions (10)
| Ticker | Security | Action | Type | Notional Value | Contracts | Underlying Price | Premium Paid | Change (Contracts) | Change (Value) |
|---|---|---|---|---|---|---|---|---|---|
M MSTR | MICROSTRATEGY INC | Bought | Put | $1.42B | 35,052 | $404.23 | $270.06 | +8,000 | +$637.1M |
N NVDA | NVIDIA CORPORATION | Bought | Put | $632.0M | 40,000 | $157.99 | $133.19 | +20,000 | +$415.2M |
I IBIT | ISHARES BITCOIN TRUST ETF | New | Put | $104.1M | 17,000 | $61.21 | $61.21 | +17,000 | +$104.1M |
C CHTR | CHARTER COMMUNICATIONS INC N | Sold | Put | $52.2M | 1,276 | $408.81 | $349.96 | -484 | -$12.7M |
A AAL | AMERICAN AIRLS GROUP INC | — | Put | $49.7M | 44,304 | $11.22 | $14.72 | 0 | +$3.0M |