Institutional Manager · CIK 0001533950
Zweig-DiMenna Associates LLC
New York, NY · File #028-14950
Latest AUM
$1.61B
Positions
106
Top-10 Concentration
47.4%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| NEW | MICROSOFT CORP | MSFT | +1,250 | +$60.5M | $0 |
| NEW | AMAZON COM INC | AMZN | +2,600 | +$60.0M | $0 |
| EXITED | BOSTON SCIENTIFIC CORP | 99DMQLRD9 | -6,000 | -$58.6M | $0 |
| EXITED | AMAZON COM INC | 99D8ZSW49 | -2,200 | -$48.3M | $0 |
| NEW | ALPHABET INC | GOOG | +825 | +$25.8M | $0 |
| NEW | META PLATFORMS INC | META | +300 | +$19.8M | $0 |
| NEW | SANDISK CORP | SNDK | +66,500 | +$15.8M | $0 |
| EXITED | QXO INC | 82846H405 | -802,800 | -$15.3M | $0 |
| EXITED | PINTEREST INC | 72352L106 | -472,350 | -$15.2M | $0 |
| ADD | NETFLIX INC | NFLX | +158,575 | +$14.9M | -$14.0M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025106 pos · $1.61B
- 13F HOLDINGS REPORTQ/E Sep 202599 pos · $1.43B
- 13F HOLDINGS REPORTQ/E Jun 202586 pos · $1.06B
- 13F HOLDINGS REPORTQ/E Mar 202564 pos · $631.4M
- 13F HOLDINGS REPORTQ/E Dec 202489 pos · $1.34B
- 13F HOLDINGS REPORTQ/E Sep 202486 pos · $990.0M
- 13F HOLDINGS REPORTQ/E Jun 202476 pos · $888.0M
- 13F HOLDINGS REPORTQ/E Mar 2024122 pos · $1.15B
- 13F HOLDINGS REPORTQ/E Dec 2023110 pos · $844.0M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | AMAZON COM INC | AMZN | 367,784 | $84.9M | 6.50% |
| 2 | APPLOVIN CORP | APP | 119,945 | $80.8M | 6.19% |
| 3 | GENEDX HOLDINGS CORP | WGSWW | 597,825 | $77.8M | 5.95% |
| 4 | BROADCOM INC | AVGO | 212,380 | $73.5M | 5.63% |
| 5 | MICROSOFT CORP | MSFT | 1,250 | $60.5M | 4.63% |
| 6 | AMAZON COM INC | AMZN | 2,600 | $60.0M | 4.60% |
| 7 | TAIWAN SEMICONDUCTOR MFG LTD | 874039100 | 190,920 | $58.0M | 4.44% |
| 8 | LUMENTUM HLDGS INC | LITE | 131,567 | $48.5M | 3.71% |
| 9 | QUANTA SVCS INC | 74762E102 | 99,000 | $41.8M | 3.20% |
| 10 | NVIDIA CORPORATION | NVDA | 176,365 | $32.9M | 2.52% |
| 11 | HUT 8 MINING CORP | HUT | 672,750 | $30.9M | 2.37% |
| 12 | NATERA INC | NTRA | 134,800 | $30.9M | 2.37% |
| 13 | CELESTICA INC | CLS | 100,439 | $29.7M | 2.27% |
| 14 | CYBERARK SOFTWARE LTD | M2682V108 | 65,459 | $29.2M | 2.24% |
| 15 | ALPHABET INC | GOOG | 825 | $25.8M | 1.98% |
| 16 | MICROSOFT CORP | MSFT | 47,450 | $22.9M | 1.76% |
| 17 | TERAWULF INC | WULF | 1,871,700 | $21.5M | 1.65% |
| 18 | MARVELL TECHNOLOGY INC | MRVL | 245,428 | $20.9M | 1.60% |
| 19 | SEAGATE TECHNOLOGY HLDNGS PL | SE | 75,001 | $20.7M | 1.58% |
| 20 | ALIBABA GROUP HOLDING LTD | BBAAY | 137,000 | $20.1M | 1.54% |