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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
CCL icon
3476
PUT
Carnival Corporation Ltd
CCL
$37.1B
$5K ﹤0.01%
62
-187
-75% -$8.42K
CIVI
3477
PUT
DELISTED
Civitas Resources
CIVI
$5K ﹤0.01%
+1
New +$2.86K
CLF icon
3478
CALL
Cleveland-Cliffs
CLF
$6.99B
$5K ﹤0.01%
583
-329
-36% -$2.12K
COR icon
3479
PUT
Cencora
COR
$60.5B
$5K ﹤0.01%
49
+23
+88% +$2.31K
CQP icon
3480
Cheniere Energy
CQP
$30.5B
$5K ﹤0.01%
+196
New +$6.03K
DGX icon
3481
PUT
Quest Diagnostics
DGX
$25.6B
$5K ﹤0.01%
12
-62
-84% -$4.44K
DSS icon
3482
DSS Inc
DSS
$5.64M
$5K ﹤0.01%
+7
New +$6.04K
EA icon
3483
PUT
Electronic Arts
EA
$52.4B
$5K ﹤0.01%
89
-13
-13% -$701
EC icon
3484
CALL
Ecopetrol
EC
$32.5B
$5K ﹤0.01%
+11
New +$178
EPAM icon
3485
EPAM Systems
EPAM
$4.92B
$5K ﹤0.01%
+93
New +$5.05K
EPC icon
3486
PUT
Edgewell Personal Care
EPC
$1.28B
$5K ﹤0.01%
36
+31
+620% +$3.07K
EQT icon
3487
CALL
EQT Corp
EQT
$32.5B
$5K ﹤0.01%
11
-397
-97% -$16.8K
ERIC icon
3488
CALL
Ericsson
ERIC
$31.8B
$5K ﹤0.01%
68
+47
+224% +$588
ERIC icon
3489
PUT
Ericsson
ERIC
$31.8B
$5K ﹤0.01%
20
-3
-13% -$38
EVTC icon
3490
Evertec
EVTC
$1.88B
$5K ﹤0.01%
+234
New +$4.94K
EWV icon
3491
ProShares Trust UltraShort MSCI Japan
EWV
$5.88M
$5K ﹤0.01%
+28
New +$6.48K
FLEX icon
3492
CALL
Flex
FLEX
$42.5B
$5K ﹤0.01%
+23
New +$202
FLR icon
3493
CALL
Fluor
FLR
$7.22B
$5K ﹤0.01%
61
+3
+5% +$171
FLWS icon
3494
CALL
1-800-Flowers.com
FLWS
$245M
$5K ﹤0.01%
+35
New +$357
FNV icon
3495
CALL
Franco-Nevada
FNV
$41.4B
$5K ﹤0.01%
85
+66
+347% +$3.43K
FUN icon
3496
Cedar Fair
FUN
$1.8B
$5K ﹤0.01%
+91
New +$4.92K
GEOS icon
3497
CALL
Geospace Technologies
GEOS
$90M
$5K ﹤0.01%
+78
New +$1.62K
GT icon
3498
PUT
Goodyear
GT
$2.04B
$5K ﹤0.01%
70
-76
-52% -$1.99K
HRTX icon
3499
CALL
Heron Therapeutics
HRTX
$86.9M
$5K ﹤0.01%
+74
New +$834
HST icon
3500
CALL
Host Hotels & Resorts
HST
$17.1B
$5K ﹤0.01%
+24
New +$536
138 139
140
141 142

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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.