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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
+5.12%
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
$1.5B
AUM Growth
+$242M
Cap. Flow
+$178M
Cap. Flow %
11.93%
Top 10 Hldgs %
18.61%
Holding
7,153
New
1,586
Increased
2,321
Reduced
1,709
Closed
1,363

Top Buys

Rank Stock Value
1
LNKD
LinkedIn Corporation
LNKD
+$21.4M
2
GLD icon
SPDR Gold Trust
GLD
+$17.3M
3
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
+$15M
4
BIIB icon
Biogen
BIIB
+$14.9M
5
V icon
Visa
V
+$14.1M

Top Sells

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$36.7M
2
GOOG icon
Alphabet (Google) Class C
GOOG
+$20.1M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$15.8M
4
C icon
Citigroup
C
+$14.7M
5
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$13.1M

Sector Composition

Rank Sector Weight
1 Communication Services 6.61%
2 Healthcare 6.55%
3 Technology 6.45%
4 Consumer Discretionary 4.54%
5 Financials 4.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
KBR icon
6126
CALL
KBR
KBR
$4.68B
– –
-75
Closed -$4K
KBR icon
6127
PUT
KBR
KBR
$4.68B
– –
-20
Closed -$1K
KEP icon
6128
PUT
Korea Electric Power
KEP
$15.5B
– –
-10
Closed -$4K
KEX icon
6129
CALL
Kirby Corp
KEX
$7.95B
– –
-25
Closed -$3K
KEYS icon
6130
CALL
Keysight
KEYS
$54.5B
– –
-20
Closed -$1K
KFRC icon
6131
Kforce
KFRC
$983M
– –
-559
Closed -$10.4K
KFY icon
6132
Korn Ferry
KFY
$3.98B
– –
-307
Closed -$8.4K
KIE icon
6133
State Street SPDR S&P Insurance ETF
KIE
$619M
– –
-15,837
Closed -$365K
TBHC
6134
DELISTED
The Brand House Collective
TBHC
– –
-1,617
Closed -$24.3K
KLAC icon
6135
KLA
KLAC
$275B
– –
-43,300
Closed -$310K
KLIC icon
6136
Kulicke & Soffa
KLIC
$5.3B
– –
-1,204
Closed -$14K
KMI icon
6137
Kinder Morgan
KMI
$73.1B
– –
-1,828
Closed -$32.6K
KMT icon
6138
Kennametal
KMT
$2.68B
– –
-7,987
Closed -$188K
KMX icon
6139
CarMax
KMX
$8.27B
– –
-7,560
Closed -$388K
KOLD icon
6140
ProShares UltraShort Bloomberg Natural Gas
KOLD
$110M
– –
-5
Closed -$3K
KOP icon
6141
Koppers
KOP
$966M
– –
-19
Closed -$492
KOPN icon
6142
Kopin
KOPN
$663M
– –
-771
Closed -$1.49K
KPTI icon
6143
CALL
Karyopharm Therapeutics
KPTI
$168M
– –
-4
Closed -$1K
KPTI icon
6144
Karyopharm Therapeutics
KPTI
$168M
– –
-135
Closed -$17.5K
KRNY icon
6145
CALL
Kearny Financial
KRNY
$592M
– –
-100
Closed -$2K
KRO icon
6146
KRONOS Worldwide
KRO
$761M
– –
-591
Closed -$3K
KTOS icon
6147
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
– –
-207
Closed -$14K
KTOS icon
6148
PUT
Kratos Defense & Security Solutions
KTOS
$8.88B
– –
-40
Closed -$1K
KYN icon
6149
Kayne Anderson Energy Infrastructure Fund
KYN
$2.52B
– –
-11,490
Closed -$208K
KYN icon
6150
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.52B
– –
-67
Closed -$2K
244 245
246
247 248

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Simplex Trading's Q2 2016 Portfolio in Review

As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.

By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.

On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.

  • Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
  • Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
  • Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
  • Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
  • Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
  • Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.

Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.