SIMPLEX TRADING, LLC

Q1 2021 13F-HR Holdings

Location
Chicago, IL
Holdings as of
3/31/2021
Date filed
4/26/2021
Form type
13F-HR
Num holdings
9,845
Total value ($000)
$55,654,631
Net value change ($000)
-21,523,145 (-27.9%)
New positions
1068
Sold out positions
682
Turnover %
47.6%
Sector allocation + QoQ delta (equities-only)
Prev filing: 2/2/2021 Next filing: 8/12/2021 SEC filing

Snapshot: Change Analysis

Compared to Q4 2020
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)
DIA 32,139 23459.1%
PARAV 23,928 788.9%
MARA 18,745 NEW
PDD 18,297 NEW
PFE 16,833 NEW
AAL 14,714 4042.3%
UAL 14,306 357650.0%
LRCX 14,077 243.9%
MSTR 13,517 126.0%
DOCU 12,286 NEW
Top Reduces (Value $000, Stocks/ETFs)
TSLA -88,505 -100.0%
QQQ -70,559 -100.0%
AMZN -68,471 -84.4%
GOOGL -38,071 -100.0%
MA -33,606 -100.0%
BABA -33,427 -100.0%
AZO -27,254 -99.7%
AAPL -24,841 -83.0%
SPY -23,565 -80.2%
WMT -21,364 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 53,866,055 (96.8% 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.
Filter:
Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type