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 | |
|---|---|---|---|---|---|---|
4176
PUT
C.H. Robinson
CHRW
$20.5B
| $7K | ﹤0.01% |
621
-293
| -32% | -$23.9K |
|
4177
PUT
ClearSign Technologies
CLIR
$25.3M
| $7K | ﹤0.01% |
+6
| New | +$196 |
|
4178
CALL
Cirrus Logic
CRUS
$6.76B
| $7K | ﹤0.01% |
71
-86
| -55% | -$4.64K |
|
4179
Ducommun
DCO
$2.56B
| $7K | ﹤0.01% |
+281
| New | +$8.4K |
|
4180
PUT
DXC Technology
DXC
$1.91B
| $7K | ﹤0.01% |
+39
| New | +$3.15K |
|
4181
CALL
Enanta Pharmaceuticals
ENTA
$362M
| $7K | ﹤0.01% |
5
-15
| -75% | -$751 |
|
4182
CALL
Entegris
ENTG
$16.3B
| $7K | ﹤0.01% |
40
-274
| -87% | -$8.4K |
|
4183
iShares MSCI Pacific ex Japan ETF
EPP
$2.21B
| $7K | ﹤0.01% |
157
+27
| +21% | +$1.27K |
|
4184
Frontline
FRO
$8.71B
| $7K | ﹤0.01% |
1,730
-3,248
| -65% | -$18.2K |
|
4185
CALL
Genesis Energy
GEL
$1.82B
| $7K | ﹤0.01% |
+206
| New | +$4.77K |
|
4186
CALL
CGI
GIB
$15.4B
| $7K | ﹤0.01% |
+31
| New | +$1.65K |
|
4187
Global Industrial
GIC
$1.38B
| $7K | ﹤0.01% |
+233
| New | +$6.85K |
|
4188
PUT
Gogo Inc
GOGO
$525M
| $7K | ﹤0.01% |
415
-139
| -25% | -$1.48K |
|
|
GOOS
4189
PUT
Canada Goose Holdings
GOOS
$903M
| $7K | ﹤0.01% |
84
-126
| -60% | -$3.09K |
|
|
GRMN
4190
PUT
Garmin
GRMN
$56.9B
| $7K | ﹤0.01% |
161
-34
| -17% | -$1.99K |
|
4191
PUT
Guidewire Software
GWRE
$13.9B
| $7K | ﹤0.01% |
111
+42
| +61% | +$3.24K |
|
4192
CALL
Houlihan Lokey
HLI
$9.72B
| $7K | ﹤0.01% |
+63
| New | +$2.7K |
|
|
HPP
4193
CALL
Hudson Pacific Properties
HPP
$758M
| $7K | ﹤0.01% |
+22
| New | +$5.29K |
|
4194
CALL
IAMGOLD
IAG
$8.05B
| $7K | ﹤0.01% |
63
+2
| +3% | +$11 |
|
4195
PUT
ICICI Bank
IBN
$107B
| $7K | ﹤0.01% |
1,876
-22
| -1% | -$203 |
|
4196
CALL
InterDigital
IDCC
$6.75B
| $7K | ﹤0.01% |
123
+112
| +1,018% | +$8.37K |
|
4197
CALL
ING
ING
$92.9B
| $7K | ﹤0.01% |
268
+84
| +46% | +$1.54K |
|
4198
Lazard
LAZ
$3.96B
| $7K | ﹤0.01% |
+142
| New | +$6.8K |
|
4199
CALL
Grand Canyon Education
LOPE
$4.22B
| $7K | ﹤0.01% |
12
-22
| -65% | -$1.99K |
|
4200
LXP Industrial Trust
LXP
$3.52B
| $7K | ﹤0.01% |
162
-173
| -52% | -$8.89K |
|
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.