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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
+6.46%
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
$122B
AUM Growth
+$7.84B
Cap. Flow
-$3.39B
Cap. Flow %
-2.78%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,350
Reduced
3,913
Closed
1,517

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$53.9M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$52.9M
3
NVDA icon
NVIDIA
NVDA
+$47.1M
4
PYPL icon
PayPal
PYPL
+$41.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$28.4M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$51.4M
2
WMT icon
Walmart Inc
WMT
+$46.4M
3
OIH icon
VanEck Oil Services ETF
OIH
+$34.2M
4
ADBE icon
Adobe
ADBE
+$33.5M
5
SBUX icon
Starbucks
SBUX
+$26.8M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Healthcare 0.21%
3 Consumer Discretionary 0.21%
4 Communication Services 0.2%
5 Financials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FRME icon
8401
PUT
First Merchants
FRME
$2.72B
$2K ﹤0.01%
+100
New +$2.84K
FTEK icon
8402
CALL
Fuel Tech
FTEK
$48M
$2K ﹤0.01%
1,900
-1,200
-39% -$1.57K
FTHM icon
8403
Fathom Holdings
FTHM
$28.2M
$2K ﹤0.01%
346
-5,456
-94% -$30.5K
FULT icon
8404
CALL
Fulton Financial
FULT
$4.7B
$2K ﹤0.01%
200
-10,500
-98% -$127K
GABC icon
8405
CALL
German American Bancorp
GABC
$1.82B
$2K ﹤0.01%
+100
New +$2.91K
GASS icon
8406
CALL
StealthGas
GASS
$328M
$2K ﹤0.01%
+600
New +$1.82K
GB
8407
DELISTED
Global Blue Group Holding
GB
$2K ﹤0.01%
454
-1,136
-71% -$6.05K
GGR icon
8408
Gogoro
GGR
$70.3M
$2K ﹤0.01%
30
+23
+329% +$1.51K
GIC icon
8409
Global Industrial
GIC
$1.34B
$2K ﹤0.01%
+90
New +$2.33K
GIC icon
8410
PUT
Global Industrial
GIC
$1.34B
$2K ﹤0.01%
+100
New +$2.59K
GOEX icon
8411
Global X Gold Explorers ETF NEW
GOEX
$106M
$2K ﹤0.01%
100
– –
GP
8412
PUT
GreenPower Motor Co
GP
$10.5M
$2K ﹤0.01%
100
-10
-9% -$264
GWH icon
8413
PUT
ESS Tech
GWH
$22.1M
$2K ﹤0.01%
127
+20
+19% +$361
HCAT icon
8414
PUT
Health Catalyst
HCAT
$154M
$2K ﹤0.01%
200
-100
-33% -$1.19K
HOUS
8415
CALL
DELISTED
Anywhere Real Estate
HOUS
$2K ﹤0.01%
300
-100
-25% -$599
ICAD
8416
DELISTED
iCAD Inc
ICAD
$2K ﹤0.01%
1,704
+956
+128% +$1.28K
ICF icon
8417
iShares Select U.S. REIT ETF
ICF
$2.12B
$2K ﹤0.01%
43
– –
IDT icon
8418
IDT Corp
IDT
$1.6B
$2K ﹤0.01%
+113
New +$3.49K
IGIC icon
8419
CALL
International General Insurance
IGIC
$1.23B
$2K ﹤0.01%
300
-19,400
-98% -$167K
III icon
8420
CALL
Information Services Group
III
$185M
$2K ﹤0.01%
400
-2,800
-88% -$14.5K
IMTX icon
8421
PUT
Immatics
IMTX
$1.24B
$2K ﹤0.01%
+200
New +$1.87K
INCR
8422
Intercure
INCR
$55.2M
$2K ﹤0.01%
1,611
+1,511
+1,511% +$3.31K
INVE icon
8423
Identive
INVE
$64.6M
$2K ﹤0.01%
+354
New +$2.42K
JBGS
8424
JBG SMITH
JBGS
$846M
$2K ﹤0.01%
160
-15,877
-99% -$231K
JRVR icon
8425
James River Group Holdings
JRVR
$218M
$2K ﹤0.01%
+150
New +$2.99K
335 336
337
338 339

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Simplex Trading's Q2 2023 Portfolio in Review

As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
  • Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
  • Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
  • Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
  • Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
  • Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.

Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.