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 | |
|---|---|---|---|---|---|---|
801
CALL
Merck
MRK
$321B
| $388K | 0.02% |
2,866
-2,886
| -50% | -$175K |
|
|
GWPH
802
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $387K | 0.02% |
473
+299
| +172% | +$32K |
|
|
803
PUT
Amgen
AMGN
$197B
| $386K | 0.02% |
2,445
-830
| -25% | -$147K |
|
804
Qorvo
QRVO
$7.76B
| $386K | 0.02% |
5,467
-2,239
| -29% | -$156K |
|
|
TTM.RT
805
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $386K | 0.02% |
1,083
+96
| +10% | +$34.2K |
|
806
Edison International
EIX
$30.8B
| $385K | 0.02% |
4,993
+2,011
| +67% | +$159K |
|
807
Alkermes
ALKS
$8.82B
| $384K | 0.02% |
7,563
+5,103
| +207% | +$273K |
|
808
PUT
General Mills
GIS
$19.3B
| $383K | 0.02% |
1,559
-1,162
| -43% | -$63.7K |
|
|
AKAO
809
DELISTED
Achaogen Inc
AKAO
| $383K | 0.02% |
24,063
+22,763
| +1,751% | +$433K |
|
810
Clorox
CLX
$11.3B
| $382K | 0.02% |
2,898
-8,762
| -75% | -$1.18M |
|
811
Brinker International
EAT
$7.94B
| $381K | 0.02% |
11,963
+3,950
| +49% | +$135K |
|
|
GRMN
812
Garmin
GRMN
$46.2B
| $381K | 0.02% |
7,067
-14,671
| -67% | -$760K |
|
813
Tucows
TCX
$101M
| $381K | 0.02% |
6,521
-14,145
| -68% | -$768K |
|
|
PPLC
814
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $380K | 0.02% |
4,273
-1,661
| -28% | -$54.2K |
|
|
VSM
815
CALL
DELISTED
Versum Materials, Inc.
VSM
| $380K | 0.02% |
+859
| New | +$30.7K |
|
|
CALA
816
DELISTED
Calithera Biosciences, Inc
CALA
| $377K | 0.02% |
1,198
-703
| -37% | -$222K |
|
817
Cheesecake Factory
CAKE
$4.2B
| $376K | 0.02% |
8,929
+5,657
| +173% | +$252K |
|
818
Nutanix
NTNX
$14.4B
| $376K | 0.02% |
16,816
+15,966
| +1,878% | +$349K |
|
819
Akamai
AKAM
$17.8B
| $375K | 0.02% |
7,706
-17,156
| -69% | -$821K |
|
|
DISH
820
PUT
DELISTED
DISH Network Corp.
DISH
| $375K | 0.02% |
1,228
-501
| -29% | -$29.6K |
|
821
CALL
Corning
GLW
$136B
| $374K | 0.02% |
570
-675
| -54% | -$20K |
|
|
GPOR
822
DELISTED
Gulfport Energy Corp.
GPOR
| $373K | 0.02% |
26,069
+25,940
| +20,109% | +$337K |
|
|
EVHC
823
PUT
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $373K | 0.02% |
688
+531
| +338% | +$28.3K |
|
824
Vail Resorts
MTN
$5.11B
| $372K | 0.02% |
+1,631
| New | +$354K |
|
|
VSI
825
DELISTED
Vitamin Shoppe Inc.
VSI
| $372K | 0.02% |
+69,569
| New | +$537K |
|
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.