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 | |
|---|---|---|---|---|---|---|
226
CALL
Alnylam Pharmaceuticals
ALNY
$35.6B
| $1.71M | 0.07% |
632
+298
| +89% | +$25.4K |
|
227
State Street SPDR S&P Homebuilders ETF
XHB
$1.71B
| $1.69M | 0.07% |
+42,462
| New | +$1.63M |
|
228
Outfront Media
OUT
$5.6B
| $1.68M | 0.07% |
+67,770
| New | +$1.49M |
|
229
Cognizant
CTSH
$20.4B
| $1.67M | 0.07% |
23,071
+1,118
| +5% | +$78.5K |
|
|
APC
230
PUT
DELISTED
Anadarko Petroleum
APC
| $1.67M | 0.07% |
2,237
-42
| -2% | -$1.85K |
|
|
FL
231
DELISTED
Foot Locker
FL
| $1.65M | 0.07% |
46,821
-20,946
| -31% | -$881K |
|
232
HDFC Bank
HDB
$119B
| $1.64M | 0.07% |
68,024
+43,048
| +172% | +$1.02M |
|
233
PUT
Snap
SNAP
$7.62B
| $1.64M | 0.07% |
5,907
-4,124
| -41% | -$59.7K |
|
234
Children's Place
PLCE
$61.6M
| $1.64M | 0.07% |
+13,851
| New | +$1.49M |
|
235
Allstate
ALL
$64.8B
| $1.62M | 0.07% |
17,659
-6,429
| -27% | -$585K |
|
236
PUT
Bausch Health
BHC
$1.71B
| $1.62M | 0.07% |
5,397
-1,422
| -21% | -$21.5K |
|
|
ATVI
237
DELISTED
Activision Blizzard
ATVI
| $1.62M | 0.07% |
25,069
+15,406
| +159% | +$961K |
|
238
PUT
Deutsche Bank
DB
$68.2B
| $1.61M | 0.07% |
2,378
+251
| +12% | +$4.35K |
|
239
PUT
Microsoft
MSFT
$2.88T
| $1.61M | 0.07% |
7,696
-1,397
| -15% | -$102K |
|
240
The Mosaic Company
MOS
$7.27B
| $1.6M | 0.07% |
74,260
-28,113
| -27% | -$609K |
|
|
GG
241
DELISTED
Goldcorp Inc
GG
| $1.6M | 0.07% |
123,232
-42,322
| -26% | -$556K |
|
242
Incyte
INCY
$23.3B
| $1.59M | 0.07% |
13,647
-14,377
| -51% | -$1.82M |
|
243
PVH
PVH
$3.7B
| $1.58M | 0.06% |
12,575
-1,517
| -11% | -$185K |
|
244
Take-Two Interactive
TTWO
$43.4B
| $1.58M | 0.06% |
15,499
+1,993
| +15% | +$178K |
|
|
ZGNX
245
CALL
DELISTED
Zogenix, Inc.
ZGNX
| $1.58M | 0.06% |
1,299
+548
| +73% | +$7.44K |
|
246
Golar LNG
GLNG
$5.15B
| $1.57M | 0.06% |
69,575
+39,154
| +129% | +$860K |
|
|
SHPG
247
DELISTED
Shire pic
SHPG
| $1.57M | 0.06% |
+10,276
| New | +$1.61M |
|
|
CEO
248
DELISTED
CNOOC Limited
CEO
| $1.57M | 0.06% |
12,101
-2,699
| -18% | -$313K |
|
249
Intuitive Surgical
ISRG
$122B
| $1.56M | 0.06% |
13,464
-24,273
| -64% | -$2.64M |
|
|
SHNY
250
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $1.56M | 0.06% |
4,833
-580
| -11% | -$6.1K |
|
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.