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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
-17.92%
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
$94.1B
AUM Growth
-$15.3B
Cap. Flow
+$11.3B
Cap. Flow %
12.02%
Top 10 Hldgs %
40.12%
Holding
11,810
New
1,405
Increased
4,027
Reduced
4,289
Closed
1,792

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$286M
2
VOO icon
Vanguard S&P 500 ETF
VOO
+$82.3M
3
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$72.6M
4
GOOG icon
Alphabet (Google) Class C
GOOG
+$64.2M
5
INTC icon
Intel
INTC
+$52.9M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$51.5M
2
SLV icon
iShares Silver Trust
SLV
+$41.8M
3
F icon
Ford
F
+$26.3M
4
UAL icon
United Airlines
UAL
+$22.7M
5
XOM icon
ExxonMobil
XOM
+$22.3M

Sector Composition

Rank Sector Weight
1 Technology 0.84%
2 Communication Services 0.32%
3 Consumer Discretionary 0.32%
4 Financials 0.28%
5 Healthcare 0.2%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
INNV icon
10451
PUT
InnovAge Holding
INNV
$1.57B
– –
-300
Closed -$1K
INOD icon
10452
Innodata
INOD
$1.83B
– –
-1,902
Closed -$12.3K
INOD icon
10453
PUT
Innodata
INOD
$1.83B
– –
-2,200
Closed -$15K
INTT icon
10454
CALL
inTEST
INTT
$173M
– –
-2,200
Closed -$23K
INTT icon
10455
inTEST
INTT
$173M
– –
-970
Closed -$7.66K
INVE icon
10456
Identive
INVE
$64.6M
– –
-171
Closed -$2.14K
INVE icon
10457
PUT
Identive
INVE
$64.6M
– –
-100
Closed -$1K
IONQ icon
10458
IonQ
IONQ
$12.3B
– –
-33,042
Closed -$234K
IOT icon
10459
Samsara
IOT
$19.3B
– –
-2,092
Closed -$25.2K
IOVA icon
10460
Iovance Biotherapeutics
IOVA
$2.23B
– –
-26,505
Closed -$347K
IPAY icon
10461
Amplify Mobile Payments ETF
IPAY
$154M
$0 ﹤0.01%
23
-100
-81% -$4.49K
IPGP icon
10462
IPG Photonics
IPGP
$3.89B
– –
-1,565
Closed -$155K
IQ icon
10463
iQIYI
IQ
$1.18B
– –
-47,465
Closed -$191K
IRDM icon
10464
Iridium Communications
IRDM
$4.85B
– –
-841
Closed -$31.4K
IRIX icon
10465
CALL
IRIDEX
IRIX
$15.5M
– –
-12,700
Closed -$58K
IRIX icon
10466
IRIDEX
IRIX
$15.5M
– –
-450
Closed -$1.53K
IRIX icon
10467
PUT
IRIDEX
IRIX
$15.5M
– –
-800
Closed -$3K
IRM icon
10468
Iron Mountain
IRM
$38.2B
– –
-2,633
Closed -$139K
IRON icon
10469
Disc Medicine
IRON
$2.83B
$0 ﹤0.01%
+17
New +$752
ISPO
10470
DELISTED
Inspirato
ISPO
– –
-1,262
Closed -$145K
ISRG icon
10471
Intuitive Surgical
ISRG
$121B
– –
-12,153
Closed -$2.85M
ITRI icon
10472
CALL
Itron
ITRI
$3.73B
– –
-5,400
Closed -$284K
ITRI icon
10473
Itron
ITRI
$3.73B
– –
-390
Closed -$19.3K
IUSV icon
10474
iShares Core S&P US Value ETF
IUSV
$27.2B
– –
-65
Closed -$4K
IVOG icon
10475
CALL
Vanguard S&P Mid-Cap 400 Growth ETF
IVOG
$1.63B
– –
-200
Closed -$27K
417 418
419
420 421

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Simplex Trading's Q2 2022 Portfolio in Review

As of Q2 2022, Simplex Trading held 11,810 positions worth $94.1B, down 14% from $109B the previous quarter. Its ten largest holdings account for 40% of the portfolio.

Simplex Trading deployed $11.3B of net new capital in Q2 2022, opening 1,405 new positions and adding to 4,027 existing holdings. Its largest new stake was Alphabet (Google) Class C: 543,540 shares worth $59.4M.

By sector, the portfolio is most concentrated in Technology at 0.84% of assets, up from 0.67% a quarter earlier, followed by Communication Services and Consumer Discretionary.

On the sell side, the largest reduction was United Airlines, an estimated $22.7M trimmed.

  • Simplex Trading's largest Q2 2022 buy was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
  • Simplex Trading added most to Apple in Q2 2022, an estimated $286M increase.
  • Simplex Trading's biggest Q2 2022 reduction was United Airlines, cutting an estimated $22.7M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2022, selling an estimated $51.5M.
  • Simplex Trading's ten largest holdings make up 40% of its $94.1B portfolio in Q2 2022.
  • Simplex Trading opened 1,405 new positions and closed 1,792 in Q2 2022.
  • Simplex Trading's portfolio value fell 14% quarter-over-quarter to $94.1B.

Based on Simplex Trading's 13F filing for Q2 2022, filed 3 Aug 2022.