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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
FMAO icon
8851
CALL
Farmers & Merchants Bancorp
FMAO
$418M
– –
-800
Closed -$22K
FMAT icon
8852
Fidelity MSCI Materials Index ETF
FMAT
$578M
– –
-45
Closed -$2K
FMC icon
8853
FMC
FMC
$1.46B
– –
-14,785
Closed -$863K
FOA icon
8854
Finance of America Companies
FOA
$200M
– –
-461
Closed -$8.21K
FOR icon
8855
CALL
Forestar Group
FOR
$1.42B
– –
-200
Closed -$6K
FR icon
8856
First Industrial Realty Trust
FR
$8.79B
– –
-792
Closed -$42K
FRBA icon
8857
First Bank
FRBA
$438M
– –
-12
Closed –
FRBA icon
8858
PUT
First Bank
FRBA
$438M
– –
-100
Closed -$1K
FRHC icon
8859
Freedom Holding
FRHC
$9.84B
– –
-299
Closed -$34.3K
FROG icon
8860
JFrog
FROG
$9.84B
– –
-7,427
Closed -$225K
FSLR icon
8861
First Solar
FSLR
$22.1B
– –
-25,931
Closed -$5.16M
FSS icon
8862
CALL
Federal Signal
FSS
$7.19B
– –
-100
Closed -$9K
FSTA icon
8863
Fidelity MSCI Consumer Staples Index ETF
FSTA
$1.38B
– –
-600
Closed -$30K
FSTR icon
8864
Foster
FSTR
$447M
– –
-127
Closed -$2K
FSTR icon
8865
PUT
Foster
FSTR
$447M
– –
-300
Closed -$6K
FTAG icon
8866
First Trust Exchange-Traded Fund II First Trust Indxx Global Agriculture ETF
FTAG
$14.4M
– –
-8
Closed –
FTCI icon
8867
FTC Solar
FTCI
$55.4M
$0 ﹤0.01%
70
-558
-89% -$2.54K
FTDR icon
8868
Frontdoor
FTDR
$4.95B
– –
-38,081
Closed -$2.06M
FTFT icon
8869
Future FinTech Group
FTFT
$2.35M
$0 ﹤0.01%
13
+11
+550% +$615
FTHM icon
8870
PUT
Fathom Holdings
FTHM
$28.2M
– –
-1,000
Closed -$2K
FTK icon
8871
Flotek Industries
FTK
$938M
– –
-4,268
Closed -$29K
FTK icon
8872
PUT
Flotek Industries
FTK
$938M
– –
-15,000
Closed -$74K
FTS icon
8873
CALL
Fortis
FTS
$29.8B
– –
-7,000
Closed -$318K
FTS icon
8874
Fortis
FTS
$29.8B
– –
-4,578
Closed -$208K
FTS icon
8875
PUT
Fortis
FTS
$29.8B
– –
-75,000
Closed -$3.41M
353 354
355
356 357

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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.