Weiss Asset Management LP
SEC Form 13F institutional filer · CIK 0001357550
13F-HR · 148 reported holdings · 2026-03-31
Hedge fund manager.
Reported long-US-equity value
$2.10B
Top-10 concentration
61.9%
Weiss Asset Management LP — $2.1B AUM allocation strategy
Weiss Asset Management LP files SEC Form 13F and reports $2.1B of long US equity value across 148 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 51.8%, followed by Financials 4.4% and Industrials 3.0%.
The top 10 holdings account for 62% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
Weiss Asset Management LP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$2.1B
total across 148 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
62% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$ALB +749K sh · +$48.9M+$AES +680K sh · +$9.44M+$CSGP +463K sh · +$17.8M
Biggest trims (shares)
−$NVDA −1.06M sh · −$265M−$MOS −616K sh · −$14.8M−$TTD −593K sh · −$22.8M
Exited to nil (held last quarter, gone now)
$KVUE ($84.2M last qtr)$ADP ($82.5M last qtr)$LIN ($63.5M last qtr)$EQIX ($55.8M last qtr)$PFG ($53.7M last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Semiconductors48.0%—
- Specialty Chemicals2.8%—
- Technology Hardware, Storage & Peripherals2.7%—
- Asset Management & Custody Banks2.5%—
- Automobile Manufacturers2.3%—
- Aerospace & Defense1.7%—
- Household Products1.6%—
- Retail REITs1.4%—
- Other holdings37.0%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 5.58M | $973M | -1.06M | 46.4% |
| $ALB | Albemarle Corporation | 820K | $59M | +749K | 2.8% |
| $TSLA | Tesla Inc | 130K | $48.1M | +38.2K | 2.3% |
| $LMT | Lockheed Martin Corporation | 61.6K | $37.2M | — | 1.8% |
| $KMB | Kimberly-Clark Corporation | 343K | $33M | — | 1.6% |
| $MU | Micron Technology Inc | 95K | $32.1M | +66.4K | 1.5% |
| $SMCI | Super Micro Computer Inc | 1.4M | $31.8M | +399K | 1.5% |
| $KKR | KKR & Co. Inc | 342K | $29M | — | 1.4% |
| $SPG | Simon Property Group Inc | 151K | $28.2M | — | 1.3% |
| $MMM | 3M Company | 185K | $26.9M | — | 1.3% |
…and 138 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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