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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
+3.1%
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
$149B
AUM Growth
-$28.3B
Cap. Flow
-$18.1B
Cap. Flow %
-12.12%
Top 10 Hldgs %
51.08%
Holding
10,500
New
2,156
Increased
2,652
Reduced
3,926
Closed
1,574

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$168M
2
NVDA icon
NVIDIA
NVDA
+$141M
3
TSM icon
TSMC
TSM
+$121M
4
META icon
Meta Platforms (Facebook)
META
+$107M
5
GLD icon
SPDR Gold Trust
GLD
+$103M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$174M
2
WDC icon
Western Digital
WDC
+$87.7M
3
AVGO icon
Broadcom
AVGO
+$62.2M
4
SOXL icon
Direxion Daily Semiconductor Bull 3X ETF
SOXL
+$52M
5
NFLX icon
Netflix
NFLX
+$44.6M

Sector Composition

Rank Sector Weight
1 Technology 0.62%
2 Communication Services 0.22%
3 Consumer Discretionary 0.21%
4 Healthcare 0.2%
5 Industrials 0.1%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CEVA icon
9151
CEVA Inc
CEVA
$1.12B
– –
-6,061
Closed -$127K
CFFN icon
9152
Capitol Federal Financial
CFFN
$1.07B
– –
-75
Closed -$534
CFG icon
9153
Citizens Financial Group
CFG
$30.6B
– –
-57,493
Closed -$3.53M
CFLT
9154
CALL
DELISTED
Confluent
CFLT
– –
-986,200
Closed -$29.8M
CFLT
9155
DELISTED
Confluent
CFLT
– –
-358,415
Closed -$10.8M
CFLT
9156
PUT
DELISTED
Confluent
CFLT
– –
-289,100
Closed -$8.74M
CG icon
9157
Carlyle Group
CG
$15.9B
– –
-33,129
Closed -$1.83M
CFR icon
9158
Cullen/Frost Bankers
CFR
$10.2B
– –
-1
Closed -$138
CGC
9159
Canopy Growth
CGC
$384M
– –
-487,670
Closed -$537K
CHD icon
9160
Church & Dwight Co
CHD
$23B
– –
-1,102
Closed -$106K
CHDN icon
9161
PUT
Churchill Downs
CHDN
$5.72B
– –
-400
Closed -$45.5K
CHCT
9162
Community Healthcare Trust
CHCT
$524M
– –
-735
Closed -$12.4K
CHEF icon
9163
CALL
Chefs' Warehouse
CHEF
$3.83B
– –
-100
Closed -$6.23K
CHH icon
9164
Choice Hotels
CHH
$4.91B
– –
-60
Closed -$6.24K
CHMI
9165
PUT
Cherry Hill Mortgage Investment Corp
CHMI
$86M
– –
-100
Closed -$254
CIBR icon
9166
First Trust NASDAQ Cybersecurity ETF
CIBR
$13.9B
– –
-994
Closed -$71K
CIEN icon
9167
Ciena
CIEN
$56.2B
– –
-8,836
Closed -$2.7M
CIM
9168
Chimera Investment
CIM
$1.05B
– –
-14,499
Closed -$189K
CIO
9169
CALL
DELISTED
City Office REIT
CIO
– –
-1,000
Closed -$6.99K
CIO
9170
DELISTED
City Office REIT
CIO
– –
-1,114
Closed -$7.79K
CIO
9171
PUT
DELISTED
City Office REIT
CIO
– –
-200
Closed -$1.4K
CION icon
9172
CALL
CION Investment
CION
$300M
– –
-100
Closed -$967
CIVI
9173
CALL
DELISTED
Civitas Resources
CIVI
– –
-43,100
Closed -$1.17M
CIVI
9174
DELISTED
Civitas Resources
CIVI
– –
-2,578
Closed -$69.8K
CIVI
9175
PUT
DELISTED
Civitas Resources
CIVI
– –
-22,800
Closed -$618K
365 366
367
368 369

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Simplex Trading's Q1 2026 Portfolio in Review

As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.

Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.

By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Amazon worth $159M.

  • Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
  • Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
  • Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
  • Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
  • Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
  • Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
  • Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.