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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
-4.08%
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
$127B
AUM Growth
+$5.5B
Cap. Flow
+$11.9B
Cap. Flow %
9.37%
Top 10 Hldgs %
44.01%
Holding
10,417
New
1,399
Increased
3,690
Reduced
3,364
Closed
1,719

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$113M
2
GLD icon
SPDR Gold Trust
GLD
+$68.6M
3
NVDA icon
NVIDIA
NVDA
+$63.4M
4
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$55.2M
5
AAPL icon
Apple
AAPL
+$54.9M

Top Sells

Rank Stock Value
1
NFLX icon
Netflix
NFLX
+$27.1M
2
QCOM icon
Qualcomm
QCOM
+$24.6M
3
DIS icon
Walt Disney
DIS
+$21.2M
4
AMD icon
Advanced Micro Devices
AMD
+$18.2M
5
SNOW icon
Snowflake
SNOW
+$16.1M

Sector Composition

Rank Sector Weight
1 Technology 0.44%
2 Consumer Discretionary 0.32%
3 Healthcare 0.22%
4 Financials 0.17%
5 Communication Services 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EVH icon
8951
Evolent Health
EVH
$475M
– –
-1,200
Closed -$33.4K
EWA icon
8952
iShares MSCI Australia ETF
EWA
$1.34B
– –
-835
Closed -$18.6K
EWG icon
8953
iShares MSCI Germany ETF
EWG
$1.5B
– –
-142
Closed -$4K
EWP icon
8954
iShares MSCI Spain ETF
EWP
$1.98B
– –
-53
Closed -$1K
EWTX icon
8955
PUT
Edgewise Therapeutics
EWTX
$4.39B
– –
-4,000
Closed -$31K
EWU icon
8956
iShares MSCI United Kingdom ETF
EWU
$4.04B
– –
-5,511
Closed -$178K
EWW icon
8957
iShares MSCI Mexico ETF
EWW
$1.89B
– –
-6,868
Closed -$427K
EXAS
8958
DELISTED
Exact Sciences
EXAS
– –
-10,643
Closed -$903K
EXFY icon
8959
Expensify
EXFY
$166M
– –
-2,172
Closed -$11.7K
EXFY icon
8960
PUT
Expensify
EXFY
$166M
– –
-2,800
Closed -$22K
EXK
8961
Endeavour Silver
EXK
$2.32B
– –
-7,480
Closed -$22.1K
EXPO icon
8962
CALL
Exponent
EXPO
$2.98B
– –
-300
Closed -$27K
EXR icon
8963
Extra Space Storage
EXR
$31.2B
– –
-589
Closed -$79.1K
EXTR icon
8964
Extreme Networks
EXTR
$3.86B
– –
-64,680
Closed -$1.75M
EYPT icon
8965
EyePoint Inc
EYPT
$1.02B
– –
-72
Closed -$790
FATE icon
8966
Fate Therapeutics
FATE
$281M
$0 ﹤0.01%
319
-9,122
-97% -$30.2K
FATE icon
8967
PUT
Fate Therapeutics
FATE
$281M
– –
-14,900
Closed -$70K
FBIN icon
8968
CALL
Fortune Brands Innovations
FBIN
$6.12B
– –
-2,400
Closed -$172K
FBRX icon
8969
Forte Biosciences
FBRX
$1.12B
– –
-54
Closed -$1.2K
FC icon
8970
CALL
Franklin Covey
FC
$233M
– –
-1,300
Closed -$56K
FC icon
8971
Franklin Covey
FC
$233M
– –
-21
Closed –
FCEL icon
8972
FuelCell Energy
FCEL
$1.7B
– –
-2,990
Closed -$156K
FCPT icon
8973
CALL
Four Corners Property Trust
FCPT
$2.86B
– –
-5,500
Closed -$139K
FCUV icon
8974
Focus Universal
FCUV
$1.61M
– –
-96
Closed -$68.2K
FCUV icon
8975
PUT
Focus Universal
FCUV
$1.61M
– –
-99
Closed -$60K
357 358
359
360 361

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Simplex Trading's Q3 2023 Portfolio in Review

As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.

Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.

By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.

On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.

  • Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
  • Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
  • Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
  • Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
  • Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
  • Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
  • Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.

Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.