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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
GUSH icon
9076
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
– –
-79,736
Closed -$2.96M
GVA icon
9077
Granite Construction
GVA
$5.45B
– –
-84
Closed -$3.41K
GWH icon
9078
PUT
ESS Tech
GWH
$22.1M
– –
-127
Closed -$2K
GWW icon
9079
W.W. Grainger
GWW
$65.3B
– –
-4,035
Closed -$2.92M
GXO icon
9080
GXO Logistics
GXO
$6.06B
– –
-51,149
Closed -$3.2M
HACK icon
9081
Amplify Cybersecurity ETF
HACK
$2.63B
– –
-272
Closed -$13K
HAS icon
9082
Hasbro
HAS
$12.6B
– –
-234
Closed -$15.5K
HBNC icon
9083
CALL
Horizon Bancorp
HBNC
$1.03B
– –
-6,000
Closed -$62K
HCAT icon
9084
CALL
Health Catalyst
HCAT
$154M
– –
-3,000
Closed -$37K
HCC icon
9085
Warrior Met Coal
HCC
$4.23B
– –
-782
Closed -$32.8K
HCM icon
9086
HUTCHMED
HCM
$1.89B
– –
-20
Closed -$286
HDV
9087
iShares Core High Dividend ETF
HDV
$14.4B
– –
-4,000
Closed -$80K
HEES
9088
PUT
DELISTED
H&E Equipment Services
HEES
– –
-900
Closed -$41K
HFFG icon
9089
CALL
HF Foods Group
HFFG
$82.9M
– –
-2,000
Closed -$9K
HFFG icon
9090
PUT
HF Foods Group
HFFG
$82.9M
– –
-3,700
Closed -$17K
HFWA icon
9091
Heritage Financial
HFWA
$1.24B
$0 ﹤0.01%
+25
New +$436
HGTY icon
9092
CALL
Hagerty
HGTY
$1.19B
– –
-5,400
Closed -$50K
HGTY icon
9093
Hagerty
HGTY
$1.19B
$0 ﹤0.01%
104
-9,928
-99% -$87K
HGV icon
9094
Hilton Grand Vacations
HGV
$3.84B
– –
-1,034
Closed -$45.6K
HGV icon
9095
PUT
Hilton Grand Vacations
HGV
$3.84B
– –
-100
Closed -$4K
HIBS icon
9096
Direxion Daily S&P 500 High Beta Bear 3X ETF
HIBS
$24.6M
– –
-119
Closed -$43K
HITI
9097
High Tide
HITI
$189M
– –
-42,661
Closed -$61K
HL icon
9098
Hecla Mining
HL
$10.2B
– –
-88,888
Closed -$426K
HLLY icon
9099
Holley
HLLY
$314M
– –
-3,360
Closed -$19K
HLNE icon
9100
PUT
Hamilton Lane
HLNE
$3.63B
– –
-100
Closed -$7K
362 363
364
365 366

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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.