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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
UTZ icon
9751
Utz Brands
UTZ
$1.25B
– –
-3,165
Closed -$43.5K
UVIX icon
9752
2x Long VIX Futures ETF
UVIX
$266M
– –
-34
Closed -$22.3K
UVSP icon
9753
Univest Financial
UVSP
$1.22B
– –
-87
Closed -$2K
UWM icon
9754
ProShares Ultra Russell2000
UWM
$261M
– –
-6,948
Closed -$290K
V icon
9755
Visa
V
$677B
– –
-3,027
Closed -$1.02M
VAW icon
9756
Vanguard Materials ETF
VAW
$2.99B
– –
-17
Closed -$3K
VCR icon
9757
Vanguard Consumer Discretionary ETF
VCR
$6.09B
– –
-98
Closed -$35.5K
VCTR icon
9758
Victory Capital Holdings
VCTR
$6.07B
– –
-45
Closed -$2K
VEGI icon
9759
iShares MSCI Agriculture Producers ETF
VEGI
$157M
– –
-854
Closed -$30K
VERA icon
9760
Vera Therapeutics
VERA
$2.59B
– –
-5,011
Closed -$161K
VFF icon
9761
Village Farms International
VFF
$248M
$0 ﹤0.01%
626
-1,532
-71% -$1.12K
VHT icon
9762
Vanguard Health Care ETF
VHT
$17.9B
– –
-31
Closed -$7K
VICI icon
9763
VICI Properties
VICI
$29.4B
– –
-144,600
Closed -$4.46M
VINP icon
9764
Vinci Compass Investments Ltd
VINP
$628M
$0 ﹤0.01%
+92
New +$925
VIOV icon
9765
Vanguard S&P Small-Cap 600 Value ETF
VIOV
$1.87B
– –
-40
Closed -$3K
VIRC icon
9766
CALL
Virco
VIRC
$94.2M
– –
-400
Closed -$4K
VIRC icon
9767
Virco
VIRC
$94.2M
– –
-1,697
Closed -$17K
VIRC icon
9768
PUT
Virco
VIRC
$94.2M
– –
-3,000
Closed -$30K
VIST icon
9769
Vista Energy
VIST
$7.45B
– –
-369
Closed -$19.1K
VNDA icon
9770
Vanda Pharmaceuticals
VNDA
$328M
– –
-16,659
Closed -$77.7K
VNET
9771
VNET Group
VNET
$2.23B
– –
-84,145
Closed -$772K
VNOM icon
9772
Viper Energy
VNOM
$8.84B
– –
-4,474
Closed -$211K
VNQI icon
9773
Vanguard Global ex-US Real Estate ETF
VNQI
$3.48B
– –
-1
Closed –
VNRX icon
9774
VolitionRx Ltd
VNRX
$12.5M
$0 ﹤0.01%
27
+8
+42% +$95
VOE icon
9775
Vanguard Mid-Cap Value ETF
VOE
$23.5B
– –
-199
Closed -$32K
389 390
391
392 393

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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.