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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
CVGW
9251
DELISTED
Calavo Growers
CVGW
– –
-6,078
Closed -$152K
CVGW
9252
PUT
DELISTED
Calavo Growers
CVGW
– –
-4,700
Closed -$102K
CVEO icon
9253
Civeo
CVEO
$386M
– –
-1,897
Closed -$50.9K
CVEO icon
9254
PUT
Civeo
CVEO
$386M
– –
-11,500
Closed -$263K
CVI icon
9255
CVR Energy
CVI
$3.51B
– –
-10,374
Closed -$267K
CVLT icon
9256
Commault Systems
CVLT
$5.81B
– –
-1,860
Closed -$176K
CVLT icon
9257
PUT
Commault Systems
CVLT
$5.81B
– –
-4,500
Closed -$564K
CVNA icon
9258
Carvana
CVNA
$44.9B
– –
-19,615
Closed -$1.46M
CVRX icon
9259
PUT
CVRx
CVRX
$135M
– –
-100
Closed -$710
CW icon
9260
Curtiss-Wright
CW
$27.1B
– –
-697
Closed -$464K
CWEB icon
9261
Direxion Daily CSI China Internet Index Bull 2X ETF
CWEB
$222M
– –
-63,335
Closed -$2.54M
CWST icon
9262
CALL
Casella Waste Systems
CWST
$5.75B
– –
-2,300
Closed -$225K
CWST icon
9263
PUT
Casella Waste Systems
CWST
$5.75B
– –
-500
Closed -$49K
CX icon
9264
Cemex
CX
$18.4B
– –
-32,478
Closed -$387K
CYD icon
9265
CALL
China Yuchai International
CYD
$1.73B
– –
-5,000
Closed -$178K
CYBR
9266
CALL
DELISTED
CyberArk
CYBR
– –
-1,100
Closed -$491K
CYBR
9267
DELISTED
CyberArk
CYBR
– –
-593
Closed -$265K
CYBR
9268
PUT
DELISTED
CyberArk
CYBR
– –
-2,800
Closed -$1.25M
CYRX icon
9269
CryoPort
CYRX
$828M
– –
-15,292
Closed -$138K
DAKT icon
9270
CALL
Daktronics
DAKT
$932M
– –
-8,800
Closed -$174K
DAN icon
9271
Dana Inc
DAN
$3.02B
– –
-12,850
Closed -$402K
DBC icon
9272
Invesco DB Commodity Index Tracking Fund
DBC
$1.72B
– –
-12,246
Closed -$311K
DCO icon
9273
PUT
Ducommun
DCO
$2.63B
– –
-300
Closed -$28.5K
DCOM icon
9274
CALL
Dime Commercial Bancshares
DCOM
$1.74B
– –
-9,200
Closed -$277K
DEEP icon
9275
Acquirers Small and Micro Deep Value ETF
DEEP
$27.8M
– –
-3
Closed -$107
369 370
371
372 373

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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.