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 | |
|---|---|---|---|---|---|---|
|
FOLD
2151
PUT
DELISTED
Amicus Therapeutics
FOLD
| $59K | ﹤0.01% |
751
+149
| +25% | +$1.97K |
|
2152
CALL
G-III Apparel Group
GIII
$1.47B
| $59K | ﹤0.01% |
371
+150
| +68% | +$3.95K |
|
2153
PUT
ICICI Bank
IBN
$106B
| $59K | ﹤0.01% |
1,898
+577
| +44% | +$5.27K |
|
2154
Lennar Class A
LEN
$20.4B
| $59K | ﹤0.01% |
1,183
-35,100
| -97% | -$1.75M |
|
2155
CALL
MPLX
MPLX
$59.5B
| $59K | ﹤0.01% |
886
+833
| +1,572% | +$28.8K |
|
2156
PUT
Norfolk Southern
NSC
$78.8B
| $59K | ﹤0.01% |
290
+100
| +53% | +$12.2K |
|
2157
CALL
PACCAR
PCAR
$69.6B
| $59K | ﹤0.01% |
480
+105
| +28% | +$4.74K |
|
2158
Universal Corp
UVV
$1.34B
| $59K | ﹤0.01% |
1,043
-1,438
| -58% | -$86K |
|
2159
Teucrium Wheat Fund
WEAT
$314M
| $59K | ﹤0.01% |
1,816
-2,723
| -60% | -$95.4K |
|
|
PETX
2160
DELISTED
Aratana Therapeutics, Inc.
PETX
| $59K | ﹤0.01% |
+9,760
| New | +$61.8K |
|
|
GGP
2161
PUT
DELISTED
GGP Inc.
GGP
| $59K | ﹤0.01% |
909
-418
| -31% | -$9.15K |
|
2162
PUT
Alaska Air
ALK
$5.15B
| $58K | ﹤0.01% |
240
+33
| +16% | +$2.7K |
|
2163
CALL
AMC Entertainment Holdings
AMC
$2.03B
| $58K | ﹤0.01% |
109
+99
| +990% | +$16.5K |
|
2164
Carvana
CVNA
$43.3B
| $58K | ﹤0.01% |
+19,810
| New | +$72.2K |
|
2165
CVS Health
CVS
$137B
| $58K | ﹤0.01% |
715
-58,473
| -99% | -$4.63M |
|
2166
Digimarc Corp
DMRC
$133M
| $58K | ﹤0.01% |
1,594
-385
| -19% | -$12K |
|
2167
Enerpac Tool Group
EPAC
$1.77B
| $58K | ﹤0.01% |
2,300
-15,710
| -87% | -$384K |
|
2168
iShares S&P Mid-Cap 400 Growth ETF
IJK
$10.8B
| $58K | ﹤0.01% |
+1,164
| New | +$57.4K |
|
2169
CALL
Kimberly-Clark
KMB
$36.4B
| $58K | ﹤0.01% |
668
+135
| +25% | +$16.5K |
|
2170
Mueller Industries
MLI
$14.1B
| $58K | ﹤0.01% |
6,680
+5,188
| +348% | +$39.8K |
|
2171
Morgan Stanley
MS
$337B
| $58K | ﹤0.01% |
+1,209
| New | +$56.1K |
|
2172
PUT
Newmont
NEM
$98.2B
| $58K | ﹤0.01% |
542
-2,552
| -82% | -$92.7K |
|
2173
CALL
Novartis
NVS
$295B
| $58K | ﹤0.01% |
240
-113
| -32% | -$8.53K |
|
2174
CALL
TD Synnex
SNX
$19.4B
| $58K | ﹤0.01% |
66
| – | – |
|
|
CTXS
2175
CALL
DELISTED
Citrix Systems Inc
CTXS
| $58K | ﹤0.01% |
305
-170
| -36% | -$13.2K |
|
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.