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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
Mettler-Toledo International
MTD
$26B
| $1.59M | 0.07% |
+2,706
| New | +$1.48M |
|
|
CYBR
227
DELISTED
CyberArk
CYBR
| $1.59M | 0.07% |
+31,840
| New | +$1.61M |
|
228
Direxion Daily Financial Bull 3x ETF
FAS
$2.38B
| $1.58M | 0.07% |
31,951
+27,486
| +616% | +$1.24M |
|
|
229
CALL
Amgen
AMGN
$199B
| $1.57M | 0.07% |
2,615
-820
| -24% | -$133K |
|
230
CALL
lululemon athletica
LULU
$12.8B
| $1.57M | 0.07% |
3,312
-538
| -14% | -$28K |
|
231
Clorox
CLX
$11.7B
| $1.55M | 0.07% |
11,660
+4,569
| +64% | +$617K |
|
232
PUT
ConocoPhillips
COP
$146B
| $1.55M | 0.07% |
5,392
+1,731
| +47% | +$80.7K |
|
|
TSRO
233
DELISTED
TESARO, Inc.
TSRO
| $1.54M | 0.07% |
11,038
-14,005
| -56% | -$2.03M |
|
234
Aflac
AFL
$63.3B
| $1.54M | 0.07% |
+39,650
| New | +$1.49M |
|
|
WCG
235
DELISTED
Wellcare Health Plans, Inc.
WCG
| $1.54M | 0.07% |
8,578
-1,595
| -16% | -$264K |
|
236
CALL
Salesforce
CRM
$135B
| $1.54M | 0.07% |
3,974
+292
| +8% | +$25.4K |
|
237
PUT
Halliburton
HAL
$28B
| $1.52M | 0.07% |
5,713
+1,933
| +51% | +$88.8K |
|
238
CALL
Trip.com Group
TCOM
$27.1B
| $1.52M | 0.07% |
2,221
+423
| +24% | +$22.4K |
|
239
CALL
JD.com
JD
$40.8B
| $1.5M | 0.07% |
6,248
+3,375
| +117% | +$127K |
|
240
Kinder Morgan
KMI
$72.7B
| $1.5M | 0.07% |
78,505
-38,571
| -33% | -$767K |
|
241
CALL
Western Digital
WDC
$192B
| $1.5M | 0.07% |
3,494
-58
| -2% | -$3.85K |
|
|
CBI
242
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.5M | 0.07% |
2,680
+1,688
| +170% | +$39.1K |
|
243
Ferrari
RACE
$65.7B
| $1.5M | 0.07% |
+17,405
| New | +$1.43M |
|
244
ManpowerGroup
MAN
$2.41B
| $1.48M | 0.06% |
13,219
+1,720
| +15% | +$178K |
|
245
CALL
Biogen
BIIB
$29.8B
| $1.47M | 0.06% |
1,543
+713
| +86% | +$189K |
|
246
Acuity Brands
AYI
$9.83B
| $1.47M | 0.06% |
+7,240
| New | +$1.28M |
|
|
247
CALL
Goldman Sachs
GS
$324B
| $1.47M | 0.06% |
4,049
+790
| +24% | +$176K |
|
248
Restaurant Brands International
QSR
$25.8B
| $1.47M | 0.06% |
23,526
+18,847
| +403% | +$1.11M |
|
249
iShares Biotechnology ETF
IBB
$9.34B
| $1.47M | 0.06% |
14,184
+13,623
| +2,428% | +$1.34M |
|
250
Cognizant
CTSH
$20.6B
| $1.46M | 0.06% |
+21,953
| New | +$1.39M |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.