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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
HBCP icon
8926
CALL
Home Bancorp
HBCP
$551M
– –
-100
Closed -$4K
HCAT icon
8927
Health Catalyst
HCAT
$151M
– –
-14,767
Closed -$104K
HCI icon
8928
CALL
HCI Group
HCI
$2.28B
– –
-200
Closed -$23K
HCOM
8929
DELISTED
Hartford Schroders Commodity Strategy ETF
HCOM
– –
-267
Closed -$3K
HCSG icon
8930
Healthcare Services Group
HCSG
$1.56B
– –
-11,910
Closed -$138K
HCSG icon
8931
PUT
Healthcare Services Group
HCSG
$1.56B
– –
-100
Closed -$1K
HEES
8932
DELISTED
H&E Equipment Services
HEES
– –
-667
Closed -$58K
HEI icon
8933
HEICO Corp
HEI
$48.4B
– –
-2,312
Closed -$549K
HEPS
8934
D-Market Electronic Services & Trading
HEPS
$1.02B
$0 ﹤0.01%
+70
New +$227
HES
8935
DELISTED
Hess
HES
– –
-354
Closed -$52K
HERO icon
8936
Global X Video Games & Esports ETF
HERO
$60.4M
$0 ﹤0.01%
22
-72
-77% -$1.82K
HGTY icon
8937
Hagerty
HGTY
$1.19B
– –
-2,240
Closed -$21.7K
HGTY icon
8938
PUT
Hagerty
HGTY
$1.19B
– –
-11,100
Closed -$107K
HI
8939
CALL
DELISTED
Hillenbrand
HI
– –
-300
Closed -$9K
HIMX
8940
Himax Technologies
HIMX
$2.19B
– –
-91,812
Closed -$849K
HIW icon
8941
Highwoods Properties
HIW
$3.68B
– –
-225
Closed -$6.57K
HLI icon
8942
Houlihan Lokey
HLI
$9.62B
– –
-375
Closed -$64.4K
HLI icon
8943
PUT
Houlihan Lokey
HLI
$9.62B
– –
-3,100
Closed -$538K
HLMN icon
8944
CALL
Hillman Solutions
HLMN
$1.55B
– –
-2,000
Closed -$19K
HLMN icon
8945
Hillman Solutions
HLMN
$1.55B
$0 ﹤0.01%
62
-454
-88% -$4.41K
HLMN icon
8946
PUT
Hillman Solutions
HLMN
$1.55B
– –
-1,500
Closed -$14K
HLNE icon
8947
PUT
Hamilton Lane
HLNE
$3.6B
– –
-2,500
Closed -$370K
MCHB
8948
Mechanics Bancorp
MCHB
$3.46B
– –
-2,202
Closed -$25K
MCHB
8949
PUT
Mechanics Bancorp
MCHB
$3.46B
– –
-16,300
Closed -$186K
HMY icon
8950
Harmony Gold Mining
HMY
$9.94B
– –
-8,130
Closed -$90.6K
356 357
358
359 360

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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.