Sign in

Simplex Trading, LLC

CIK:0001488542
Hedge Fund
$1B AUM
8,476 holdings
Chicago, IL, US
Founded:2010
60 employees
Latest filing:Jun 30, 2025

Simplex Trading, LLC is a proprietary trading firm headquartered in Chicago, Illinois. Founded in 2010, it specializes in quantitative trading strategies and serves as a broker-dealer regulated by FINRA. The company utilizes advanced technology and mathematical models to make markets in equities, ETFs, and derivatives, and employs approximately 60 people.

Investment Strategy

Simplex Trading, LLC deploys proprietary quantitative and algorithmic trading strategies across multiple asset classes, including equities, options, and ETFs. The firm is known for its market-making activities and uses advanced data analytics and technology platforms to deliver liquidity and execute high-frequency trades, focusing on risk management and capital efficiency in electronic markets.

Top Buys
N
NVDANVIDIA CORPORATION
+$271.4M
A
AAPLAPPLE INC
+$154.4M
A
AVGOBROADCOM INC
+$137.5M
B
BKNGBOOKING HOLDINGS INC
+$65.5M
S
SPYSPDR S&P 500 ETF TR
+$61.9M
Top Sells
T
TLTISHARES TR
-$149.7M
A
AMZNAMAZON COM INC
-$44.9M
P
PFEPFIZER INC
-$40.1M
N
NFLXNETFLIX INC
-$31.1M
T
TSLATESLA INC
-$30.4M

Top Holdings

N
NVDANVIDIA CORPORATION
+0.2%$392.0M
A
AAPLAPPLE INC
+0.1%$209.6M
A
AVGOBROADCOM INC
+0.1%$152.1M
T
TLTISHARES TR
+0.1%$128.7M
G
GOOGLALPHABET INC
+0.1%$125.9M

Equity Positions (2,091)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
N
NVDA
NVIDIA CORPORATION0.22%$392.0M2,481,314$135.86$157.99+$271.4M
A
AAPL
APPLE INC0.12%$209.6M1,021,727$215.94$205.17+$154.4M
A
AVGO
BROADCOM INC0.09%$152.1M551,694$258.61$275.65+$137.5M
T
TLT
ISHARES TR0.07%$128.7M1,457,996$91.03$88.25-$149.7M
G
GOOGL
ALPHABET INC0.07%$125.9M714,528$159.74$176.23+$41.5M

Industry Allocation

SEMICONDUCTORS & RELATED DEVICES
+0.5%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+0.2%
ELECTRONIC COMPUTERS
+0.1%
SERVICES-PREPACKAGED SOFTWARE
+0.1%
PHARMACEUTICAL PREPARATIONS
+0.1%