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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
-4.36%
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
CUBE icon
8676
CubeSmart
CUBE
$9.53B
– –
-123
Closed -$5.14K
CUE icon
8677
CALL
Cue Biopharma
CUE
$135M
– –
-113
Closed -$3K
CULP icon
8678
Culp Inc
CULP
$45M
– –
-641
Closed -$3K
CURE icon
8679
Direxion Daily Healthcare Bull 3X ETF
CURE
$178M
– –
-1,683
Closed -$155K
CURV icon
8680
Torrid Holdings
CURV
$247M
– –
-25,469
Closed -$153K
CURV icon
8681
PUT
Torrid Holdings
CURV
$247M
– –
-185,700
Closed -$971K
CVBF icon
8682
CVB Financial
CVBF
$3.98B
– –
-101
Closed -$2.01K
CVEO icon
8683
CALL
Civeo
CVEO
$379M
– –
-13,300
Closed -$302K
CVI icon
8684
CVR Energy
CVI
$3.36B
– –
-9,577
Closed -$187K
CVX icon
8685
Chevron
CVX
$388B
– –
-70,250
Closed -$11M
CWAN
8686
DELISTED
Clearwater Analytics
CWAN
– –
-10,482
Closed -$294K
CWCO icon
8687
CALL
Consolidated Water Co
CWCO
$469M
– –
-200
Closed -$5K
CXT icon
8688
CALL
Crane NXT
CXT
$3.04B
– –
-600
Closed -$34K
CXW icon
8689
CoreCivic
CXW
$3.1B
– –
-88,457
Closed -$1.78M
HELP
8690
Cybin Inc
HELP
$472M
– –
-17,563
Closed -$152K
DAVE icon
8691
Dave Inc
DAVE
$5.12B
– –
-2,944
Closed -$276K
DB icon
8692
Deutsche Bank
DB
$66.3B
– –
-15,713
Closed -$330K
DBC icon
8693
Invesco DB Commodity Index Tracking Fund
DBC
$1.73B
– –
-21,055
Closed -$467K
DBB icon
8694
Invesco DB Base Metals Fund
DBB
$306M
– –
-220
Closed -$4.24K
DBMF icon
8695
iMGP DBi Managed Futures Strategy ETF
DBMF
$3.95B
– –
-226
Closed -$5K
DBMF icon
8696
PUT
iMGP DBi Managed Futures Strategy ETF
DBMF
$3.95B
– –
-300
Closed -$7K
DBX icon
8697
Dropbox
DBX
$6.81B
– –
-35,963
Closed -$1.05M
DCBO
8698
Docebo
DCBO
$492M
– –
-2
Closed -$76
DCOM icon
8699
Dime Commercial Bancshares
DCOM
$1.75B
– –
-70
Closed -$2.12K
DDM icon
8700
ProShares Ultra Dow30
DDM
$531M
– –
-1,002
Closed -$47K
346 347
348
349 350

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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.