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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
+2.14%
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
$860M
AUM Growth
+$34.4M
Cap. Flow
-$17.8M
Cap. Flow %
-2.07%
Top 10 Hldgs %
14.96%
Holding
6,670
New
1,973
Increased
1,386
Reduced
1,513
Closed
1,643

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$40.1M
2
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$12.5M
3
BABA icon
Alibaba
BABA
+$10.5M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$9.89M
5
INTC icon
Intel
INTC
+$9.83M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$35.7M
2
GILD icon
Gilead Sciences
GILD
+$32.3M
3
AMZN icon
Amazon
AMZN
+$29M
4
BKNG icon
Booking.com
BKNG
+$28.4M
5
BIDU icon
Baidu
BIDU
+$13.3M

Sector Composition

Rank Sector Weight
1 Communication Services 7.76%
2 Consumer Discretionary 7.62%
3 Healthcare 7.24%
4 Technology 6.95%
5 Financials 4.83%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GTE icon
4476
Gran Tierra Energy
GTE
$260M
$1K ﹤0.01%
+37
New +$1K
GVA icon
4477
PUT
Granite Construction
GVA
$5.45B
$1K ﹤0.01%
+6
New +$208
GYRE icon
4478
Gyre Therapeutics
GYRE
$662M
$1K ﹤0.01%
+1
New +$2.07K
GYRE icon
4479
PUT
Gyre Therapeutics
GYRE
$662M
– –
0
– –
H icon
4480
CALL
Hyatt Hotels
H
$17.6B
$1K ﹤0.01%
17
-15
-47% -$877
HACK icon
4481
CALL
Amplify Cybersecurity ETF
HACK
$2.63B
$1K ﹤0.01%
+13
New +$356
HAIN icon
4482
PUT
Hain Celestial
HAIN
$47.8M
$1K ﹤0.01%
43
-65
-60% -$3.85K
HBI
4483
PUT
DELISTED
Hanesbrands
HBI
$1K ﹤0.01%
87
+51
+142% +$1.54K
HEES
4484
PUT
DELISTED
H&E Equipment Services
HEES
$1K ﹤0.01%
5
-11
-69% -$247
HLT icon
4485
PUT
Hilton Worldwide
HLT
$74B
$1K ﹤0.01%
17
-29
-63% -$2.4K
HMY icon
4486
PUT
Harmony Gold Mining
HMY
$9.92B
$1K ﹤0.01%
7
-50
-88% -$121
HOG icon
4487
CALL
Harley-Davidson
HOG
$2.68B
$1K ﹤0.01%
5
– –
HQY icon
4488
CALL
HealthEquity
HQY
$7.91B
$1K ﹤0.01%
+10
New +$217
HRL icon
4489
CALL
Hormel Foods
HRL
$13.9B
$1K ﹤0.01%
+14
New +$383
HRTX icon
4490
PUT
Heron Therapeutics
HRTX
$86.3M
$1K ﹤0.01%
+76
New +$857
HST icon
4491
PUT
Host Hotels & Resorts
HST
$16.8B
$1K ﹤0.01%
9
-10
-53% -$223
IBN icon
4492
PUT
ICICI Bank
IBN
$106B
$1K ﹤0.01%
46
-702
-94% -$7.29K
IMNN icon
4493
Imunon
IMNN
$6.35M
– –
0
– –
INFY icon
4494
PUT
Infosys
INFY
$45B
$1K ﹤0.01%
324
-212
-40% -$1.87K
IPG
4495
CALL
DELISTED
Interpublic Group of Companies
IPG
$1K ﹤0.01%
5
– –
ITW icon
4496
PUT
Illinois Tool Works
ITW
$81.4B
$1K ﹤0.01%
19
-2
-10% -$193
JBL icon
4497
Jabil
JBL
$32.8B
$1K ﹤0.01%
+72
New +$1.57K
JLL icon
4498
CALL
Jones Lang LaSalle
JLL
$15.1B
$1K ﹤0.01%
1
-13
-93% -$2.05K
OPLN
4499
PUT
Openlane
OPLN
$4.17B
$1K ﹤0.01%
69
-31
-31% -$420
KBH icon
4500
KB Home
KBH
$3.48B
$1K ﹤0.01%
74
-58,036
-100% -$810K
178 179
180
181 182

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Simplex Trading's Q1 2015 Portfolio in Review

As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.

By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.

  • Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
  • Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
  • Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
  • Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
  • Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
  • Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
  • Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.

Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.