Simplex Trading Portfolio holdings
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.
Top Buys
| 1 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Northrop Grumman
NOC
$83.7B
| $945K | 0.11% |
+5,876
| New | +$945K |
|
|
PCP
102
DELISTED
PRECISION CASTPARTS CORP
PCP
| $942K | 0.11% |
+4,487
| New | +$942K |
|
|
QIHU
103
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $940K | 0.11% |
18,365
+7,030
| +62% | +$360K |
|
|
CS
104
DELISTED
Credit Suisse Group
CS
| $928K | 0.11% |
34,474
+24,798
| +256% | +$668K |
|
|
KITE
105
DELISTED
Kite Pharma, Inc.
KITE
| $925K | 0.11% |
16,044
+13,954
| +668% | +$805K |
|
|
RAI
106
DELISTED
Reynolds American Inc
RAI
| $914K | 0.11% |
13,277
+5,838
| +78% | +$402K |
|
107
Union Pacific
UNP
$132B
| $909K | 0.11% |
8,393
-9,687
| -54% | -$1.05M |
|
|
DTV
108
DELISTED
DIRECTV COM STK (DE)
DTV
| $903K | 0.11% |
10,622
+9,823
| +1,229% | +$835K |
|
|
BLUE
109
DELISTED
bluebird bio
BLUE
| $898K | 0.1% |
7,441
-1,719
| -19% | -$207K |
|
|
AGN
110
DELISTED
Allergan plc
AGN
| $893K | 0.1% |
3,003
-10,714
| -78% | -$3.19M |
|
111
Vanguard FTSE Europe ETF
VGK
$26.5B
| $860K | 0.1% |
15,866
-3,476
| -18% | -$188K |
|
112
Vanguard Real Estate ETF
VNQ
$34.1B
| $859K | 0.1% |
10,189
-7,922
| -44% | -$668K |
|
|
PRE
113
DELISTED
PARTNERRE LTD
PRE
| $857K | 0.1% |
+7,499
| New | +$857K |
|
114
Freeport-McMoran
FCX
$66.1B
| $852K | 0.1% |
44,978
+41,209
| +1,093% | +$781K |
|
|
ETFC
115
DELISTED
E*Trade Financial Corporation
ETFC
| $848K | 0.1% |
29,724
+6,546
| +28% | +$187K |
|
116
Accenture
ACN
$158B
| $825K | 0.1% |
+8,816
| New | +$825K |
|
117
American Tower
AMT
$93.9B
| $824K | 0.1% |
8,753
+7,133
| +440% | +$671K |
|
|
ATHN
118
DELISTED
Athenahealth, Inc.
ATHN
| $819K | 0.1% |
6,865
+4,422
| +181% | +$528K |
|
119
Zillow
ZG
$19.2B
| $814K | 0.09% |
+8,125
| New | +$814K |
|
|
SPLK
120
DELISTED
Splunk Inc
SPLK
| $814K | 0.09% |
13,752
+3,373
| +32% | +$200K |
|
121
Royal Bank of Canada
RY
$205B
| $813K | 0.09% |
13,478
+10,845
| +412% | +$654K |
|
122
SPDR S&P Homebuilders ETF
XHB
$1.91B
| $812K | 0.09% |
22,043
+20,085
| +1,026% | +$740K |
|
|
MNK
123
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $807K | 0.09% |
+6,372
| New | +$807K |
|
124
Molson Coors Class B
TAP
$9.91B
| $798K | 0.09% |
10,730
+3,299
| +44% | +$245K |
|
125
SPDR S&P Retail ETF
XRT
$429M
| $789K | 0.09% |
7,817
-14,766
| -65% | -$1.49M |
|