Zweig-DiMenna Associates LLC
SEC Form 13F institutional filer · CIK 0001533950
13F-HR · 28 reported holdings · 2026-03-31
Reported long-US-equity value
$0.49B
Top-10 concentration
60.0%
Zweig-DiMenna Associates LLC — $486M AUM allocation strategy
Zweig-DiMenna Associates LLC files SEC Form 13F and reports $486M of long US equity value across 28 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 46.1%, followed by Communication Services 15.9% and Consumer Discretionary 15.4%.
The top 10 holdings account for 60% 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.
Zweig-DiMenna Associates LLC — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$486M
total across 28 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
60% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$ANET +56K sh · +$6.69M+$COHR +39.9K sh · +$13.6M+$LRCX +31.1K sh · +$9.42M
Biggest trims (shares)
−$AVGO −143K sh · −$52M−$LVS −95K sh · −$7.28M−$LITE −90.8K sh · −$19.9M
Exited to nil (held last quarter, gone now)
$MRVL ($20.9M last qtr)$WDC ($14.3M last qtr)$PM ($14.3M last qtr)$BSX ($12.9M last qtr)$DG ($11.9M 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)
- Broadline Retail15.4%—
- Semiconductors12.3%—
- Semiconductor Materials & Equipment11.2%—
- Communications Equipment7.9%—
- Interactive Media & Services7.4%—
- Advertising6.6%—
- Systems Software5.8%—
- Electronic Components5.8%—
- Other holdings27.6%—
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 |
|---|---|---|---|---|---|
| $AMZN | Amazon.com Inc | 360K | $74.9M | -8.03K | 15.4% |
| $APP | Applovin Corporation | 81K | $32.2M | -39K | 6.6% |
| $LITE | Lumentum Holdings Inc | 40.8K | $28.6M | -90.8K | 5.9% |
| $COHR | Coherent Corp | 117K | $27.8M | +39.9K | 5.7% |
| $NVDA | NVIDIA Corporation | 131K | $22.8M | -45.7K | 4.7% |
| $AMAT | Applied Materials Inc | 65.3K | $22.3M | — | 4.6% |
| $AVGO | Broadcom Inc | 69.6K | $21.5M | -143K | 4.4% |
| $META | Meta Platforms Inc | 36.3K | $20.8M | +6.03K | 4.3% |
| $LRCX | Lam Research Corporation | 96.5K | $20.6M | +31.1K | 4.2% |
| $V | Visa Inc | 66.7K | $20.2M | +11.3K | 4.1% |
…and 18 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
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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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