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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

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
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$122B
AUM Growth
+$7.84B
Cap. Flow
-$3.39B
Cap. Flow %
-2.78%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,350
Reduced
3,913
Closed
1,517

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 Technology 0.41%
2 Healthcare 0.21%
3 Consumer Discretionary 0.21%
4 Communication Services 0.2%
5 Financials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FISI icon
9251
CALL
Financial Institutions
FISI
$762M
– –
-5,800
Closed -$111K
FIZZ icon
9252
National Beverage
FIZZ
$2.86B
– –
-2,072
Closed -$104K
FIZZ icon
9253
PUT
National Beverage
FIZZ
$2.86B
– –
-6,100
Closed -$321K
FLBR icon
9254
Franklin FTSE Brazil ETF
FLBR
$547M
– –
-509
Closed -$8K
FLCH icon
9255
Franklin FTSE China ETF
FLCH
$277M
– –
-97
Closed -$1K
FLNT
9256
PUT
Fluent
FLNT
$102M
– –
-1,750
Closed -$8K
FMNB icon
9257
CALL
Farmers National Banc Corp
FMNB
$878M
– –
-200
Closed -$2K
FMX icon
9258
PUT
Fomento Económico Mexicano
FMX
$43.3B
– –
-7,500
Closed -$713K
FN icon
9259
Fabrinet
FN
$18.6B
– –
-1,280
Closed -$137K
FND icon
9260
Floor & Decor
FND
$5.73B
– –
-659
Closed -$63K
FNF icon
9261
Fidelity National Financial
FNF
$13.1B
– –
-5,708
Closed -$199K
FNGR icon
9262
FingerMotion
FNGR
$17M
– –
-5,660
Closed -$10.8K
FOR icon
9263
Forestar Group
FOR
$1.42B
$0 ﹤0.01%
24
-650
-96% -$12.5K
FOXA icon
9264
Fox Class A
FOXA
$23.1B
– –
-53,073
Closed -$1.81M
FPE icon
9265
CALL
First Trust Preferred Securities and Income ETF
FPE
$6.31B
– –
-5,900
Closed -$94K
FPH icon
9266
PUT
Five Point Holdings
FPH
$363M
– –
-900
Closed -$2K
FPX icon
9267
CALL
First Trust US Equity Opportunities ETF
FPX
$1.55B
– –
-300
Closed -$25K
FRSH icon
9268
Freshworks
FRSH
$2.7B
– –
-566
Closed -$8.51K
FRSX
9269
Foresight Autonomous Holdings
FRSX
$4.17M
– –
-10
Closed -$452
FSV icon
9270
CALL
FirstService
FSV
$6.03B
– –
-100
Closed -$14K
FSV icon
9271
FirstService
FSV
$6.03B
– –
-277
Closed -$39K
FSV icon
9272
PUT
FirstService
FSV
$6.03B
– –
-500
Closed -$70K
FTK icon
9273
CALL
Flotek Industries
FTK
$938M
– –
-1,100
Closed -$4K
FTK icon
9274
Flotek Industries
FTK
$938M
$0 ﹤0.01%
16
-664
-98% -$2.71K
FTK icon
9275
PUT
Flotek Industries
FTK
$938M
– –
-2,067
Closed -$8K
369 370
371
372 373

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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, 3,350 increased, 3,913 reduced and 1,517 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 Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • 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 1,517 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.