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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
PUT
Citigroup
C
$216B
| $1.36M | 0.09% |
6,512
-668
| -9% | -$30.4K |
|
|
202
PUT
SPDR Gold Trust
GLD
$132B
| $1.35M | 0.09% |
5,122
-4,071
| -44% | -$519K |
|
203
ProShares UltraShort Yen
YCS
$34.2M
| $1.33M | 0.09% |
87,608
+75,872
| +646% | +$1.18M |
|
|
WWAV
204
DELISTED
The WhiteWave Foods Company
WWAV
| $1.33M | 0.09% |
24,370
-28,942
| -54% | -$1.59M |
|
205
American Airlines Group
AAL
$10.1B
| $1.31M | 0.09% |
+35,895
| New | +$1.27M |
|
206
CALL
Mastercard
MA
$476B
| $1.31M | 0.09% |
1,829
-610
| -25% | -$58.5K |
|
|
ARIA
207
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $1.28M | 0.09% |
93,693
-84,223
| -47% | -$846K |
|
208
Radware
RDWR
$1.28B
| $1.28M | 0.09% |
93,280
+57,624
| +162% | +$750K |
|
209
PUT
McKesson
MCK
$97.3B
| $1.25M | 0.09% |
316
+41
| +15% | +$7.64K |
|
|
X
210
CALL
DELISTED
US Steel
X
| $1.25M | 0.08% |
4,150
-1,117
| -21% | -$23.1K |
|
211
CALL
ConocoPhillips
COP
$143B
| $1.24M | 0.08% |
4,536
-1,204
| -21% | -$50K |
|
|
X
212
PUT
DELISTED
US Steel
X
| $1.24M | 0.08% |
7,110
+1,536
| +28% | +$31.7K |
|
213
PUT
GoPro
GPRO
$125M
| $1.24M | 0.08% |
5,157
+3,797
| +279% | +$52.1K |
|
214
Teck Resources
TECK
$27.8B
| $1.23M | 0.08% |
67,952
-31,860
| -32% | -$508K |
|
215
Pan American Silver
PAAS
$18.7B
| $1.22M | 0.08% |
+69,509
| New | +$1.3M |
|
216
Delek US
DK
$4.12B
| $1.2M | 0.08% |
69,663
+49,131
| +239% | +$753K |
|
217
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $1.19M | 0.08% |
85,600
-7,900
| -8% | -$65K |
|
218
iShares Semiconductor ETF
SOXX
$46.3B
| $1.17M | 0.08% |
31,197
+29,337
| +1,577% | +$1.02M |
|
|
ITCI
219
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.16M | 0.08% |
1,246
+1,010
| +428% | +$40.8K |
|
|
220
PUT
Booking.com
BKNG
$139B
| $1.15M | 0.08% |
19,575
-16,125
| -45% | -$899K |
|
|
BBBY
221
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.15M | 0.08% |
26,694
+7,066
| +36% | +$314K |
|
222
Aon
AON
$76.8B
| $1.13M | 0.08% |
10,082
+1,806
| +22% | +$199K |
|
223
Puma Biotechnology
PBYI
$422M
| $1.13M | 0.08% |
16,918
+8,770
| +108% | +$443K |
|
224
PUT
Goldman Sachs
GS
$320B
| $1.13M | 0.08% |
5,248
-590
| -10% | -$95.9K |
|
225
Signet Jewelers
SIG
$3.51B
| $1.13M | 0.08% |
+15,187
| New | +$1.28M |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.