We are live on ! Find out more
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
-4.36%
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
$156B
AUM Growth
-$22.4B
Cap. Flow
-$7.93B
Cap. Flow %
-5.08%
Top 10 Hldgs %
50.56%
Holding
10,070
New
1,566
Increased
3,139
Reduced
3,654
Closed
1,547

Top Buys

Rank Stock Value
1
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$272M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$99M
3
NVDA icon
NVIDIA
NVDA
+$89.9M
4
TSM icon
TSMC
TSM
+$87.7M
5
AMZN icon
Amazon
AMZN
+$61M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$518M
2
MSTR icon
Strategy Inc
MSTR
+$81.2M
3
BABA icon
Alibaba
BABA
+$66.7M
4
AMD icon
Advanced Micro Devices
AMD
+$44.3M
5
UBER icon
Uber
UBER
+$41.3M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Consumer Discretionary 0.22%
3 Healthcare 0.17%
4 Communication Services 0.15%
5 Financials 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DFAS icon
8701
Dimensional US Small Cap ETF
DFAS
$15.2B
– –
-100
Closed -$6K
DHT icon
8702
DHT Holdings
DHT
$2.97B
– –
-169,823
Closed -$1.83M
DHX icon
8703
DHI Group
DHX
$166M
$0 ﹤0.01%
67
-4,228
-98% -$9.59K
DIA icon
8704
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$45.8B
– –
-31,837
Closed -$13.8M
DIOD icon
8705
Diodes
DIOD
$4B
– –
-811
Closed -$43.8K
DIVI icon
8706
PUT
Franklin International Core Dividend Tilt Index ETF
DIVI
$2.64B
– –
-200
Closed -$2K
DKL icon
8707
Delek Logistics
DKL
$3.04B
– –
-7,419
Closed -$315K
DKS icon
8708
Dick's Sporting Goods
DKS
$18.4B
– –
-18,196
Closed -$4.06M
DLB icon
8709
CALL
Dolby
DLB
$4.72B
– –
-12,200
Closed -$952K
DLB icon
8710
PUT
Dolby
DLB
$4.72B
– –
-30,200
Closed -$2.36M
DLNG icon
8711
Dynagas LNG Partners
DLNG
$131M
– –
-592
Closed -$2.64K
DLHC icon
8712
CALL
DLH Holdings
DLHC
$73.8M
– –
-18,500
Closed -$148K
DLHC icon
8713
DLH Holdings
DLHC
$73.8M
– –
-2,573
Closed -$15.8K
DLTR icon
8714
Dollar Tree
DLTR
$23.1B
– –
-148,540
Closed -$10.6M
DMAC icon
8715
CALL
DiaMedica Therapeutics
DMAC
$363M
– –
-39,800
Closed -$216K
DMLP icon
8716
PUT
Dorchester Minerals
DMLP
$1.34B
– –
-11,900
Closed -$396K
DOMO icon
8717
Domo
DOMO
$166M
– –
-40,822
Closed -$327K
DOW icon
8718
Dow Inc
DOW
$21.6B
– –
-62,223
Closed -$2.39M
DOX icon
8719
Amdocs
DOX
$5.53B
– –
-65
Closed -$5.67K
DRH icon
8720
CALL
Diamondrock Hospitality Co
DRH
$2.63B
– –
-200
Closed -$1K
DRH icon
8721
Diamondrock Hospitality Co
DRH
$2.63B
– –
-69
Closed –
DRI icon
8722
Darden Restaurants
DRI
$22.5B
– –
-30,892
Closed -$5.96M
DRIP icon
8723
Direxion Daily S&P Oil & Gas Exp. & Prod. Bear 2X ETF
DRIP
$103M
– –
-9
Closed –
DRLL icon
8724
Strive US Energy ETF
DRLL
$298M
– –
-109
Closed -$2K
DRRX
8725
CALL
DELISTED
DURECT Corp
DRRX
– –
-2,600
Closed -$1K
347 348
349
350 351

Similar funds

Mitsubishi UFJ Asset Management
Mitsubishi UFJ Asset Management Tokyo, Japan $149B AUM 24.71% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $147B AUM 18.73% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Simplex Trading's Q1 2025 Portfolio in Review

As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.

Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.

Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.

  • Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
  • Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
  • Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
  • Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
  • Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
  • Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
  • Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.

Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.