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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+6.46%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$122B
AUM Growth
+$7.84B
Cap. Flow
+$86.7M
Cap. Flow %
0.07%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,349
Reduced
3,911
Closed
1,518

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$53.9M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$52.9M
3
NVDA icon
NVIDIA
NVDA
+$47.1M
4
PYPL icon
PayPal
PYPL
+$41.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$28.4M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$51.4M
2
WMT icon
Walmart Inc
WMT
+$46.4M
3
OIH icon
VanEck Oil Services ETF
OIH
+$34.2M
4
ADBE icon
Adobe
ADBE
+$33.5M
5
SBUX icon
Starbucks
SBUX
+$26.8M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.43%
2 Technology 0.41%
3 Healthcare 0.21%
4 Consumer Discretionary 0.21%
5 Communication Services 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BZQ icon
9001
ProShares UltraShort MSCI Brazil Capped
BZQ
$2.17M
– –
-8
Closed –
BZUN
9002
Baozun
BZUN
$167M
– –
-4,292
Closed -$19.2K
CAAP icon
9003
PUT
Corporacion America
CAAP
$3.99B
– –
-200
Closed -$2K
CACI icon
9004
CACI
CACI
$13.8B
– –
-327
Closed -$102K
CACI icon
9005
PUT
CACI
CACI
$13.8B
– –
-2,100
Closed -$622K
CAF
9006
Morgan Stanley China A Share Fund
CAF
$317M
$0 ﹤0.01%
63
+1
+2% +$13
CAE icon
9007
PUT
CAE Inc
CAE
$7.86B
– –
-5,100
Closed -$115K
CAH icon
9008
Cardinal Health
CAH
$57.5B
– –
-30,561
Closed -$2.58M
CAL icon
9009
Caleres
CAL
$418M
– –
-5,719
Closed -$128K
CANE icon
9010
Teucrium Sugar Fund
CANE
$58.5M
– –
-16,247
Closed -$184K
CAPL icon
9011
PUT
CrossAmerica Partners
CAPL
$872M
– –
-200
Closed -$4K
CASH icon
9012
Pathward Financial
CASH
$1.73B
– –
-1,409
Closed -$63.2K
CASY icon
9013
Casey's General Stores
CASY
$28B
– –
-168
Closed -$38.1K
CATO icon
9014
Cato Corp
CATO
$51.8M
$0 ﹤0.01%
+48
New +$398
CATY icon
9015
Cathay General Bancorp
CATY
$4.18B
– –
-1,181
Closed -$37.5K
CBAT icon
9016
CBAK Energy Technology Ltd
CBAT
$87.2M
$0 ﹤0.01%
+668
New +$650
CBRL icon
9017
Cracker Barrel
CBRL
$1.22B
– –
-261
Closed -$26.8K
CBT icon
9018
Cabot Corp
CBT
$4.21B
– –
-5,366
Closed -$382K
CBZ icon
9019
CALL
CBIZ
CBZ
$2.98B
– –
-2,400
Closed -$118K
CCAP icon
9020
PUT
Crescent Capital BDC
CCAP
$382M
– –
-100
Closed -$1K
CCC
9021
PUT
CCC Intelligent Solutions
CCC
$4.42B
– –
-700
Closed -$6K
CCO icon
9022
CALL
Clear Channel Outdoor Holdings
CCO
$1.21B
– –
-27,000
Closed -$32K
CCRN
9023
PUT
DELISTED
Cross Country Healthcare
CCRN
– –
-500
Closed -$11K
CCSI icon
9024
CALL
Consensus Cloud Solutions
CCSI
$648M
– –
-900
Closed -$30K
CCU icon
9025
CALL
Compañía de Cervecerías Unidas
CCU
$2.19B
– –
-200
Closed -$3K
359 360
361
362 363

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Simplex Trading's Q2 2023 Portfolio in Review

As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q2 2023 filing shows 1,474 new, 3,349 increased, 3,911 reduced and 1,518 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 99% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
  • Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
  • Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
  • Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
  • Simplex Trading opened 1,474 new positions and closed 1,518 in Q2 2023.
  • Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.

Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.