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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+8.29%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$114B
AUM Growth
+$21.9B
Cap. Flow
-$49.6M
Cap. Flow %
-0.04%
Top 10 Hldgs %
37.97%
Holding
10,803
New
1,536
Increased
3,663
Reduced
3,631
Closed
1,728

Top Buys

Rank Stock Value
1
WMT icon
Walmart Inc
WMT
+$43.6M
2
AAPL icon
Apple
AAPL
+$40.9M
3
OIH icon
VanEck Oil Services ETF
OIH
+$37.7M
4
C icon
Citigroup
C
+$34.2M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$32.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$189M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
3
NVDA icon
NVIDIA
NVDA
+$115M
4
TSLA icon
Tesla
TSLA
+$52M
5
META icon
Meta Platforms (Facebook)
META
+$49M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.51%
2 Technology 0.42%
3 Consumer Discretionary 0.2%
4 Healthcare 0.17%
5 Industrials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
HPE icon
9451
Hewlett Packard
HPE
$69B
– –
-106,521
Closed -$1.67M
HPQ icon
9452
HP
HPQ
$29.4B
– –
-36,977
Closed -$1.06M
HR icon
9453
Healthcare Realty
HR
$6.55B
– –
-67,884
Closed -$1.37M
HROW icon
9454
PUT
Harrow
HROW
$1.44B
– –
-24,500
Closed -$361K
HRTG icon
9455
Heritage Insurance Holdings
HRTG
$1.01B
– –
-17,106
Closed -$44.6K
HRZN icon
9456
Horizon Technology Finance
HRZN
$324M
– –
-3,563
Closed -$42.5K
HTLD icon
9457
Heartland Express
HTLD
$962M
– –
-156
Closed -$2.54K
HTOO icon
9458
Fusion Fuel Green
HTOO
$17.8M
– –
-1,261
Closed -$158K
HUBB icon
9459
PUT
Hubbell
HUBB
$24.3B
– –
-1,600
Closed -$375K
HUBG icon
9460
HUB Group
HUBG
$2.24B
– –
-1,990
Closed -$86.8K
HUMA icon
9461
Humacyte
HUMA
$168M
– –
-3,171
Closed -$9.02K
AGIG
9462
Abundia Global Impact Group
AGIG
$51.2M
– –
-58
Closed -$1.91K
HVT icon
9463
CALL
Haverty Furniture Companies
HVT
$445M
– –
-600
Closed -$17K
HVT icon
9464
PUT
Haverty Furniture Companies
HVT
$445M
– –
-100
Closed -$2K
HWM icon
9465
Howmet Aerospace
HWM
$103B
– –
-157
Closed -$6.43K
HYMB icon
9466
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
HYMB
$3.42B
– –
-9,580
Closed -$234K
IART icon
9467
CALL
Integra LifeSciences
IART
$1.3B
– –
-4,000
Closed -$224K
IART icon
9468
Integra LifeSciences
IART
$1.3B
– –
-6,844
Closed -$383K
IART icon
9469
PUT
Integra LifeSciences
IART
$1.3B
– –
-700
Closed -$39K
IBIO icon
9470
iBio
IBIO
$84.2M
– –
-235
Closed -$6.05K
IBN icon
9471
ICICI Bank
IBN
$109B
– –
-52,876
Closed -$1.1M
IBOC icon
9472
CALL
International Bancshares
IBOC
$4.47B
– –
-100
Closed -$4K
IBP icon
9473
Installed Building Products
IBP
$6.34B
– –
-110
Closed -$9K
IBP icon
9474
PUT
Installed Building Products
IBP
$6.34B
– –
-1,800
Closed -$154K
ICAD
9475
DELISTED
iCAD Inc
ICAD
$0 ﹤0.01%
748
-893
-54% -$1.85K
377 378
379
380 381

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Simplex Trading's Q1 2023 Portfolio in Review

As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.

By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
  • Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
  • Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
  • Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
  • Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
  • Simplex Trading opened 1,536 new positions and closed 1,728 in Q1 2023.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.

Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.