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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
+4.79%
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
$179B
AUM Growth
+$8.24B
Cap. Flow
+$1.08B
Cap. Flow %
0.6%
Top 10 Hldgs %
48.72%
Holding
10,008
New
1,520
Increased
3,222
Reduced
3,616
Closed
1,504

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$552M
2
MSTR icon
Strategy Inc
MSTR
+$85.8M
3
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
+$48.1M
4
INTC icon
Intel
INTC
+$45.4M
5
UBER icon
Uber
UBER
+$43M

Top Sells

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$133M
2
PDD icon
Pinduoduo
PDD
+$82.6M
3
BA icon
Boeing
BA
+$49.8M
4
KWEB icon
KraneShares CSI China Internet ETF
KWEB
+$45.1M
5
MSFT icon
Microsoft
MSFT
+$41M

Sector Composition

Rank Sector Weight
1 Technology 0.68%
2 Consumer Discretionary 0.23%
3 Healthcare 0.19%
4 Financials 0.13%
5 Communication Services 0.11%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DGRO icon
8701
iShares Core Dividend Growth ETF
DGRO
$42.5B
– –
-1,680
Closed -$105K
DGS icon
8702
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.7B
– –
-8,686
Closed -$466K
DHI icon
8703
D.R. Horton
DHI
$40.7B
– –
-41,837
Closed -$6.99M
DIBS icon
8704
CALL
1stdibs.com
DIBS
$145M
– –
-46,100
Closed -$203K
DIVO icon
8705
Amplify CWP Enhanced Dividend Income ETF
DIVO
$7.41B
– –
-4,734
Closed -$194K
DJP icon
8706
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$817M
– –
-100
Closed -$3.18K
DLB icon
8707
Dolby
DLB
$4.72B
– –
-40
Closed -$3.05K
DLNG icon
8708
PUT
Dynagas LNG Partners
DLNG
$136M
– –
-5,000
Closed -$18K
DLO icon
8709
dLocal
DLO
$4.26B
– –
-64,303
Closed -$647K
DLX icon
8710
Deluxe
DLX
$1.2B
– –
-348
Closed -$7.47K
DMAC icon
8711
DiaMedica Therapeutics
DMAC
$366M
– –
-3,662
Closed -$17.3K
DMLP icon
8712
Dorchester Minerals
DMLP
$1.34B
– –
-3,419
Closed -$112K
DNB
8713
DELISTED
Dun & Bradstreet
DNB
– –
-2,013
Closed -$24.1K
DNB
8714
PUT
DELISTED
Dun & Bradstreet
DNB
– –
-5,200
Closed -$59K
DNLI icon
8715
Denali Therapeutics
DNLI
$3.65B
– –
-3,475
Closed -$89K
DNLI icon
8716
PUT
Denali Therapeutics
DNLI
$3.65B
– –
-12,500
Closed -$364K
DNOW icon
8717
DNOW Inc
DNOW
$2.63B
– –
-823
Closed -$11.1K
DNOW icon
8718
PUT
DNOW Inc
DNOW
$2.63B
– –
-500
Closed -$6K
DOC icon
8719
CALL
Healthpeak Properties
DOC
$15.4B
– –
-1,100
Closed -$25K
DOCN icon
8720
DigitalOcean
DOCN
$14.5B
– –
-31,836
Closed -$1.25M
DOCU
8721
DocuSign
DOCU
$9.58B
– –
-35,412
Closed -$2.83M
DOUG icon
8722
Douglas Elliman
DOUG
$156M
– –
-7,463
Closed -$14.3K
DRH icon
8723
Diamondrock Hospitality Co
DRH
$2.63B
$0 ﹤0.01%
69
-101
-59% -$922
DRIO icon
8724
DarioHealth
DRIO
$53.5M
$0 ﹤0.01%
64
-6
-9% -$104
DRIP icon
8725
Direxion Daily S&P Oil & Gas Exp. & Prod. Bear 2X ETF
DRIP
$102M
$0 ﹤0.01%
+9
New +$941
347 348
349
350 351

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Simplex Trading's Q4 2024 Portfolio in Review

As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.

Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.

By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
  • Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
  • Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
  • Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
  • Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
  • Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
  • Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.

Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.