SIMPLEX TRADING, LLC

Q3 2025 13F-HR Holdings

Location
Chicago, IL
Holdings as of
9/30/2025
Date filed
11/12/2025
Form type
13F-HR
Num holdings
9,236
Total value ($000)
$194,890,676
Net value change ($000)
+20,245,632 (11.6%)
New positions
1003
Sold out positions
809
Turnover %
36.0%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/5/2025 Next filing: 2/11/2026 SEC filing

Snapshot: Change Analysis

Compared to Q2 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
MSFT 237,381 NEW
IWM 107,870 259.6%
AMZN 93,938 1098.6%
AAPL 84,087 40.1%
IBIT 81,635 460.6%
PDD 61,254 NEW
TSLA 59,515 NEW
UNH 54,309 96.6%
IREN 47,564 236.2%
SPY 40,916 66.1%
Top Reduces (Value $000, Stocks/ETFs)
TLT -128,668 -100.0%
GOOGL -60,047 -47.7%
AVGO -59,206 -38.9%
META -58,728 -100.0%
GOOGL -55,589 -87.6%
AMD -46,868 -96.6%
MU -37,191 -49.0%
BABA -35,591 -99.8%
TSM -30,559 -48.4%
EWZ -27,564 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 190,356,930 (97.7% of total reported value)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type