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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
FDC
1951
CALL
DELISTED
First Data Corporation
FDC
| $76K | ﹤0.01% |
917
-704
| -43% | -$12.8K |
|
1952
Ameren
AEE
$31.5B
| $75K | ﹤0.01% |
1,308
+864
| +195% | +$49.9K |
|
1953
PUT
HSBC
HSBC
$355B
| $75K | ﹤0.01% |
1,620
-791
| -33% | -$35K |
|
1954
Kaiser Aluminum
KALU
$2.67B
| $75K | ﹤0.01% |
+736
| New | +$70.9K |
|
1955
CALL
LGI Homes
LGIH
$1.4B
| $75K | ﹤0.01% |
148
-238
| -62% | -$10.6K |
|
1956
CALL
Intellia Therapeutics
NTLA
$1.5B
| $75K | ﹤0.01% |
139
-191
| -58% | -$3.6K |
|
1957
CALL
Philips
PHG
$25.4B
| $75K | ﹤0.01% |
386
+335
| +657% | +$9.75K |
|
1958
PUT
United Natural Foods
UNFI
$3.01B
| $75K | ﹤0.01% |
227
-252
| -53% | -$9.38K |
|
1959
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$746M
| $75K | ﹤0.01% |
415
-1,722
| -81% | -$40.9K |
|
1960
Veeco
VECO
$3.15B
| $75K | ﹤0.01% |
3,538
+2,239
| +172% | +$53.6K |
|
|
RBS.PRX
1961
CALL
DELISTED
ROYAL BK SCOTLAND GRP"XCAPS"-A
RBS.PRX
| $75K | ﹤0.01% |
1,218
-183
| -13% | -$11.3K |
|
1962
CALL
Enbridge
ENB
$124B
| $74K | ﹤0.01% |
655
-265
| -29% | -$10.8K |
|
|
EMBJ
1963
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $74K | ﹤0.01% |
347
-190
| -35% | -$4.05K |
|
1964
Nokia
NOK
$50.8B
| $74K | ﹤0.01% |
12,398
+7,506
| +153% | +$46.7K |
|
1965
CALL
Petrobras
PBR
$121B
| $74K | ﹤0.01% |
519
-229
| -31% | -$2.08K |
|
1966
Travelzoo
TZOO
$103M
| $74K | ﹤0.01% |
8,637
-20,184
| -70% | -$188K |
|
1967
Westlake Chemical Partners
WLKP
$777M
| $74K | ﹤0.01% |
3,270
+2,017
| +161% | +$48.6K |
|
|
CLR
1968
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $74K | ﹤0.01% |
570
-170
| -23% | -$5.77K |
|
|
GWPH
1969
CALL
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $74K | ﹤0.01% |
236
-166
| -41% | -$17.8K |
|
|
NLSN
1970
PUT
DELISTED
Nielsen Holdings plc
NLSN
| $74K | ﹤0.01% |
644
+211
| +49% | +$8.43K |
|
|
DISH
1971
CALL
DELISTED
DISH Network Corp.
DISH
| $74K | ﹤0.01% |
464
-98
| -17% | -$5.79K |
|
|
AXDX
1972
PUT
DELISTED
Accelerate Diagnostics
AXDX
| $73K | ﹤0.01% |
89
+81
| +1,013% | +$19.9K |
|
1973
AXIS Capital
AXS
$8.59B
| $73K | ﹤0.01% |
+1,279
| New | +$79K |
|
1974
CALL
Dillards
DDS
$8.87B
| $73K | ﹤0.01% |
324
+199
| +159% | +$12.3K |
|
1975
CALL
HCA Healthcare
HCA
$84.8B
| $73K | ﹤0.01% |
282
-381
| -57% | -$30.6K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.