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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2101
CNA Financial
CNA
$14.5B
| $71K | ﹤0.01% |
+1,352
| New | +$71.2K |
|
2102
Cohu
COHU
$2.39B
| $71K | ﹤0.01% |
3,257
-2,931
| -47% | -$69.9K |
|
2103
PUT
Everest Group
EG
$15.2B
| $71K | ﹤0.01% |
139
-87
| -38% | -$19.6K |
|
2104
CALL
Essent Group
ESNT
$6.06B
| $71K | ﹤0.01% |
170
+127
| +295% | +$5.53K |
|
2105
PUT
Medtronic
MDT
$107B
| $71K | ﹤0.01% |
1,126
-278
| -20% | -$22.3K |
|
2106
Natera
NTRA
$37.5B
| $71K | ﹤0.01% |
7,938
+99
| +1% | +$1.07K |
|
2107
Ring Energy
REI
$322M
| $71K | ﹤0.01% |
+5,136
| New | +$69K |
|
|
SAGE
2108
PUT
DELISTED
Sage Therapeutics
SAGE
| $71K | ﹤0.01% |
643
+246
| +62% | +$23.9K |
|
2109
VEON
VEON
$3.53B
| $71K | ﹤0.01% |
744
-171
| -19% | -$16.7K |
|
2110
Workiva
WK
$2.94B
| $71K | ﹤0.01% |
+3,352
| New | +$73.7K |
|
|
EGRX
2111
PUT
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $71K | ﹤0.01% |
267
+93
| +53% | +$5.18K |
|
|
ADXS
2112
PUT
DELISTED
Advaxis Inc
ADXS
| $71K | ﹤0.01% |
14
-2
| -13% | -$101 |
|
|
KSU
2113
PUT
DELISTED
Kansas City Southern
KSU
| $71K | ﹤0.01% |
419
+301
| +255% | +$32.1K |
|
|
GPOR
2114
PUT
DELISTED
Gulfport Energy Corp.
GPOR
| $71K | ﹤0.01% |
367
+22
| +6% | +$293 |
|
|
BFYT
2115
CALL
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $71K | ﹤0.01% |
129
-344
| -73% | -$7.69K |
|
|
OAK
2116
PUT
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $71K | ﹤0.01% |
320
+197
| +160% | +$8.71K |
|
|
ACRE
2117
Ares Commercial Real Estate
ACRE
$252M
| $70K | ﹤0.01% |
+5,432
| New | +$72.2K |
|
2118
Teucrium Corn Fund
CORN
$190M
| $70K | ﹤0.01% |
+4,188
| New | +$71.5K |
|
2119
PUT
MiMedx Group
MDXG
$626M
| $70K | ﹤0.01% |
954
-259
| -21% | -$3.16K |
|
2120
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $70K | ﹤0.01% |
927
+708
| +323% | +$31.8K |
|
2121
CALL
Rio Tinto
RIO
$148B
| $70K | ﹤0.01% |
161
-551
| -77% | -$26.9K |
|
2122
PUT
Smith & Wesson
SWBI
$655M
| $70K | ﹤0.01% |
435
+305
| +235% | +$3.3K |
|
2123
CALL
Toll Brothers
TOL
$14B
| $70K | ﹤0.01% |
256
+134
| +110% | +$6.17K |
|
|
TRVG
2124
PUT
trivago
TRVG
$386M
| $70K | ﹤0.01% |
147
+129
| +717% | +$5.29K |
|
|
EPZM
2125
PUT
DELISTED
Epizyme, Inc
EPZM
| $70K | ﹤0.01% |
+512
| New | +$7.44K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.