Parallax Volatility Advisers, LLC

Hedge Fund • Vol Arbitrage

Parallax Volatility Advisers, LLC is a Hedge Fund specializing in Vol Arbitrage based in Rockledge, FL led by William Frederick Bartlett, reporting $8.9B in AUM as of Q3 2025 with META as the largest holding (7% allocation).

CEOWilliam Frederick Bartlett

Portfolio Value: $3.0B
Positions: 449
Top Holding: META at 7.1%
Last Reported: Q3 2025

Address573 Barnes Blvd, Suite 103, Rockledge, FL, 32955, United States

Top Holdings

Largest long holdings in Parallax Volatility Advisers, LLC's portfolio (36.1% of total portfolio)

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Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 Meta Platforms, Inc. META	Internet Content & Information Communication Services	$209.6M	7.10%	+$192.1M Bought	0.01% 285.4K shares	Q4 2013 Held for 11y 11m
2 GLD SPDR Gold Trust GLD	Unknown Unknown	$194.8M	6.60%	+$194.8M Bought	— 548.1K shares	Q1 2024 Held for 1y 8m
3 Nvidia NVDA	Semiconductors Technology	$134.6M	4.56%	-$96.3M Sold	0.00% 721.2K shares	≤ Q2 2013 Held for 12y 5m+
4 Palantir Technologies Inc. PLTR	Software - Infrastructure Technology	$112.7M	3.82%	+$94.8M Bought	0.03% 618.0K shares	Q4 2020 Held for 4y 11m
5 Tesla, Inc. TSLA	Auto - Manufacturers Consumer Cyclical	$109.9M	3.72%	+$109.9M Bought	0.01% 247.2K shares	≤ Q2 2013 Held for 12y 5m+
6 Cloudflare, Inc. NET	Software - Infrastructure Technology	$79.1M	2.68%	+$1.7M Bought	0.11% 368.4K shares	Q1 2020 Held for 5y 8m
7 Invesco QQQ Trust QQQ	ETF ETF	$63.8M	2.16%	+$63.8M Bought	— 106.3K shares	Q1 2022 Held for 3y 8m
8 General Electric GE	Aerospace & Defense Industrials	$62.2M	2.11%	-$6.0M Sold	0.02% 206.7K shares	≤ Q2 2013 Held for 12y 5m+
9 Netflix NFLX	Entertainment Communication Services	$53.5M	1.81%	-$29.2M Sold	0.01% 44.6K shares	≤ Q2 2013 Held for 12y 5m+
10 General Electric GEV	Renewable Utilities Utilities	$47.4M	1.60%	-$21.4M Sold	0.03% 77.0K shares	Q2 2024 Held for 1y 5m

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Changes

Portfolio activity, position movements, and quarter-over-quarter changes in Parallax Volatility Advisers, LLC's latest filing

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Market Value

$3.0B

Prior: $2.0B

Q/Q Change

+46.64%

+$939.5M

Net Flows % of MV

-4.0%

Turnover Ratio

40.99%

New Purchases

20 stocks

$27.8M

Added To

139 stocks

+$758.1M

Sold Out Of

114 stocks

$250.5M

Reduced Holdings

141 stocks

-$653.5M

Increased Positions

Position	Shares Δ	Change
1 KCHV Kochav Defense Acquisition Corp. Class A Ordinary Shares KCHV	New	0 → 584.9K +$5.9M
2 OTGA OTG Acquisition Corp. I OTGA	New	0 → 353.4K +$3.6M
3 Nebius Group N.V. NBIS	New	0 → 27.3K +$3.1M
4 KOYN CSLM Digital Asset Acquisition Corp III Class A Ordinary Shares KOYN	New	0 → 270.5K +$2.7M
5 PAII Pyrophyte Acquisition Corp. II PAII	New	0 → 263.6K +$2.6M

Decreased Positions

Position	Shares Δ	Change
1 Microsoft MSFT	Sold	88.9K → 0 −$44.2M
2 American Express AXP	Sold	73.1K → 0 −$23.3M
3 Sprott Physical Gold and Silver Trust CEF	Sold	641.8K → 0 −$19.3M
4 Eli Lilly LLY	Sold	12.5K → 0 −$9.7M
5 SoFi Technologies, Inc. SOFI	Sold	488.1K → 0 −$8.9M

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Analytics

Portfolio insights and performance metrics for Parallax Volatility Advisers, LLC

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Sector Allocation

Technology

29.70%

Communication Services

13.10%

Consumer Cyclical

10.80%

Financial Services

10.80%

Industrials

6.80%

ETF

6.60%

Healthcare

3.30%

Utilities

2.70%

Consumer Defensive

2.60%

Energy

2.00%

Basic Materials

1.00%

Real Estate

0.40%

Market Cap Distribution

Mega Cap (> $200B)

36.93%

Large Cap ($10B - $200B)

38.14%

Mid Cap ($2B - $10B)

5.52%

Small Cap ($300M - $2B)

1.89%

Micro Cap ($50M - $300M)

0.13%

Nano Cap (< $50M)

0.29%

N/A (ETF or Unknown)

17.10%

Portfolio Concentration

Top 10 Holdings %

36.14%

Top 20 Holdings %

48.8%

Top 50 Holdings %

68.67%

Top 100 Holdings %

83.86%