Institutional Manager · CIK 0001521001
Parallax Volatility Advisers, L.P.
San Francisco, CA · File #028-14500
Latest AUM
$50.70B
Positions
1,605
Top-10 Concentration
64.2%
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 |
|---|---|---|---|---|---|
| REDUCE | SPDR S&P 500 ETF TR | SPY | -33,413,727 | -$22.79B | +$528.0M |
| REDUCE | INVESCO QQQ TR | IVZ | -3,287,100 | -$2.02B | +$98.4M |
| REDUCE | ISHARES TR | 464287655 | -7,224,534 | -$1.78B | +$33.0M |
| REDUCE | SPDR GOLD TR | GLD | -2,610,900 | -$1.03B | +$159.9M |
| REDUCE | TESLA INC | TSLA | -1,640,500 | -$737.8M | +$12.1M |
| REDUCE | BROADCOM INC | AVGO | -1,484,882 | -$513.9M | +$26.8M |
| REDUCE | TAIWAN SEMICONDUCTOR MFG LTD | 874039100 | -1,324,048 | -$402.4M | +$34.5M |
| REDUCE | NVIDIA CORPORATION | NVDA | -1,226,100 | -$228.7M | -$432,640 |
| REDUCE | BOEING CO | BA-PA | -1,024,800 | -$222.5M | +$1.8M |
| REDUCE | ADVANCED MICRO DEVICES INC | AMD | -902,799 | -$193.3M | +$49.5M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20251,605 pos · $50.70B
- 13F HOLDINGS REPORTQ/E Sep 20251,573 pos · $65.94B
- 13F HOLDINGS REPORTQ/E Jun 20251,527 pos · $44.36B
- 13F HOLDINGS REPORTQ/E Mar 20251,518 pos · $36.92B
- 13F HOLDINGS REPORTQ/E Dec 20241,989 pos · $51.55B
- 13F HOLDINGS REPORTQ/E Sep 20241,989 pos · $54.94B
- 13F HOLDINGS REPORTQ/E Jun 20241,943 pos · $46.45B
- 13F HOLDINGS REPORTQ/E Mar 20241,762 pos · $44.66B
- 13F HOLDINGS REPORTQ/E Dec 20232,242 pos · $44.81B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | SPDR S&P 500 ETF TR | SPY | 13,015,600 | $8.88B | 28.12% |
| 2 | INVESCO QQQ TR | IVZ | 3,768,600 | $2.32B | 7.34% |
| 3 | INVESCO QQQ TR | IVZ | 3,116,300 | $1.91B | 6.07% |
| 4 | SPDR S&P 500 ETF TR | SPY | 2,732,800 | $1.86B | 5.91% |
| 5 | ISHARES TR | 464287655 | 4,864,100 | $1.20B | 3.79% |
| 6 | TESLA INC | TSLA | 2,505,900 | $1.13B | 3.57% |
| 7 | SELECT SECTOR SPDR TR | 81369Y605 | 17,601,200 | $964.0M | 3.05% |
| 8 | NVIDIA CORPORATION | NVDA | 4,181,900 | $779.9M | 2.47% |
| 9 | SELECT SECTOR SPDR TR | 81369Y605 | 11,350,400 | $621.7M | 1.97% |
| 10 | META PLATFORMS INC | META | 929,400 | $613.5M | 1.94% |
| 11 | APPLE INC | AAPL | 2,163,000 | $588.0M | 1.86% |
| 12 | META PLATFORMS INC | META | 871,100 | $575.0M | 1.82% |
| 13 | SPDR GOLD TR | GLD | 1,305,000 | $517.2M | 1.64% |
| 14 | NVIDIA CORPORATION | NVDA | 2,683,800 | $500.5M | 1.59% |
| 15 | BROADCOM INC | AVGO | 1,415,200 | $489.8M | 1.55% |
| 16 | ALPHABET INC | GOOG | 1,550,100 | $485.2M | 1.54% |
| 17 | SPDR GOLD TR | GLD | 1,175,300 | $465.8M | 1.48% |
| 18 | TESLA INC | TSLA | 779,300 | $350.5M | 1.11% |
| 19 | VANECK ETF TRUST | 92189F676 | 860,400 | $309.9M | 0.98% |
| 20 | TAIWAN SEMICONDUCTOR MFG LTD | 874039100 | 998,000 | $303.3M | 0.96% |