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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
+6.28%
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
$91.9B
AUM Growth
+$3.47B
Cap. Flow
+$1.91B
Cap. Flow %
2.08%
Top 10 Hldgs %
34.1%
Holding
11,206
New
1,219
Increased
3,365
Reduced
4,370
Closed
1,942

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$170M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$71.3M
3
T icon
AT&T
T
+$44.2M
4
META icon
Meta Platforms (Facebook)
META
+$37.1M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$34.4M

Top Sells

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$94.3M
2
JPM icon
JPMorgan Chase
JPM
+$68.2M
3
C icon
Citigroup
C
+$62.8M
4
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$50.9M
5
GLD icon
SPDR Gold Trust
GLD
+$46.3M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.38%
2 Technology 0.35%
3 Communication Services 0.24%
4 Healthcare 0.2%
5 Consumer Staples 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
G icon
9576
PUT
Genpact
G
$5.3B
– –
-300
Closed -$13K
GANX icon
9577
Gain Therapeutics
GANX
$74.6M
– –
-100
Closed –
GASS icon
9578
PUT
StealthGas
GASS
$328M
– –
-8,000
Closed -$20K
GBCI icon
9579
Glacier Bancorp
GBCI
$6.55B
– –
-27
Closed -$1.46K
GBTG icon
9580
American Express Global Business Travel
GBTG
$4.91B
– –
-8,884
Closed -$48.9K
GBX icon
9581
The Greenbrier Companies
GBX
$1.61B
– –
-11,073
Closed -$369K
GCT icon
9582
GigaCloud Technology
GCT
$1.35B
$0 ﹤0.01%
165
-369
-69% -$2.22K
GDDY icon
9583
GoDaddy
GDDY
$12.3B
– –
-1,039
Closed -$77.9K
GDXJ icon
9584
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
– –
-252,237
Closed -$7.43M
GDYN icon
9585
CALL
Grid Dynamics Holdings
GDYN
$476M
– –
-8,500
Closed -$159K
GDYN icon
9586
PUT
Grid Dynamics Holdings
GDYN
$476M
– –
-300
Closed -$5K
GERN icon
9587
Geron
GERN
$911M
– –
-181,914
Closed -$408K
GHI icon
9588
CALL
Greystone Housing Impact Investors LP
GHI
$121M
– –
-925
Closed -$15K
GHI icon
9589
PUT
Greystone Housing Impact Investors LP
GHI
$121M
– –
-103
Closed -$1K
GIL icon
9590
Gildan
GIL
$9.25B
– –
-1,592
Closed -$46.2K
GKOS icon
9591
Glaukos
GKOS
$9.02B
– –
-3,738
Closed -$184K
GL icon
9592
PUT
Globe Life
GL
$13.5B
– –
-500
Closed -$49K
GLAD icon
9593
Gladstone Capital
GLAD
$425M
– –
-1,845
Closed -$35.4K
GLD icon
9594
SPDR Gold Trust
GLD
$131B
– –
-287,272
Closed -$46.3M
GLOB icon
9595
Globant
GLOB
$1.35B
– –
-308
Closed -$54.5K
DMRA
9596
Damora Therapeutics, Inc. Ordinary Shares
DMRA
$1.77B
– –
-384
Closed -$18K
GMAB icon
9597
CALL
Genmab
GMAB
$17.7B
– –
-100
Closed -$3K
GMED icon
9598
PUT
Globus Medical
GMED
$10.4B
– –
-100
Closed -$5K
GNE icon
9599
PUT
Genie Energy
GNE
$378M
– –
-600
Closed -$5K
GNL icon
9600
Global Net Lease
GNL
$1.87B
– –
-5,866
Closed -$72.7K
382 383
384
385 386

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Simplex Trading's Q4 2022 Portfolio in Review

As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.

Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
  • Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
  • Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
  • Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
  • Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
  • Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
  • Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.

Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.