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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
TIGO icon
10151
Millicom
TIGO
$16.5B
– –
-42,040
Closed -$2.76M
TIGR
10152
UP Fintech Holding
TIGR
$860M
– –
-330,741
Closed -$2.69M
TILE icon
10153
CALL
Interface
TILE
$1.86B
– –
-500
Closed -$14K
TIPT icon
10154
Tiptree Inc
TIPT
$669M
– –
-33,069
Closed -$566K
TITN icon
10155
PUT
Titan Machinery
TITN
$446M
– –
-1,700
Closed -$25.6K
TKNO icon
10156
Alpha Teknova
TKNO
$284M
– –
-48
Closed -$135
TKR icon
10157
PUT
Timken Company
TKR
$9.34B
– –
-200
Closed -$16.8K
TKO icon
10158
TKO Group
TKO
$13.7B
– –
-8,347
Closed -$1.71M
TLPH icon
10159
Talphera
TLPH
$67M
– –
-85,799
Closed -$77.6K
TLS icon
10160
PUT
Telos
TLS
$342M
– –
-1,100
Closed -$5.61K
TLSA icon
10161
PUT
Tiziana Life Sciences
TLSA
$127M
– –
-2,900
Closed -$4.32K
TMCI icon
10162
Treace Medical Concepts
TMCI
$274M
– –
-25,929
Closed -$51.7K
TMCI icon
10163
PUT
Treace Medical Concepts
TMCI
$274M
– –
-58,900
Closed -$144K
TMFC icon
10164
Motley Fool 100 Index ETF
TMFC
$2.05B
– –
-720
Closed -$51.7K
TMHC icon
10165
CALL
Taylor Morrison
TMHC
$6.66B
– –
-500
Closed -$29.4K
TMUS icon
10166
T-Mobile US
TMUS
$206B
– –
-1,438
Closed -$295K
TMV icon
10167
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$177M
– –
-29,653
Closed -$1.1M
TNC icon
10168
CALL
Tennant Co
TNC
$1.46B
– –
-100
Closed -$7.37K
TNC icon
10169
Tennant Co
TNC
$1.46B
– –
-3
Closed -$221
TNC icon
10170
PUT
Tennant Co
TNC
$1.46B
– –
-1,300
Closed -$95.8K
TNK icon
10171
Teekay Tankers
TNK
$2.49B
– –
-519
Closed -$34.7K
TOI icon
10172
The Oncology Institute
TOI
$550M
– –
-1,806
Closed -$5.54K
TOWN icon
10173
Towne Bank
TOWN
$3.32B
– –
-17
Closed -$567
TOWN icon
10174
PUT
Towne Bank
TOWN
$3.32B
– –
-500
Closed -$16.7K
TPH
10175
DELISTED
Tri Pointe Homes
TPH
– –
-557
Closed -$22.7K
405 406
407
408 409

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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.