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 | |
|---|---|---|---|---|---|---|
|
P
976
Everpure Inc
P
$25B
| $290K | 0.01% |
18,144
-9,040
| -33% | -$124K |
|
|
POT
977
DELISTED
Potash Corp Of Saskatchewan
POT
| $290K | 0.01% |
15,123
+12,027
| +388% | +$214K |
|
978
CALL
Hain Celestial
HAIN
$49.1M
| $289K | 0.01% |
897
-1,473
| -62% | -$60.9K |
|
|
ETP
979
PUT
DELISTED
Energy Transfer Partners, L.P.
ETP
| $289K | 0.01% |
1,108
+406
| +58% | +$7.88K |
|
980
PUT
Helmerich & Payne
HP
$3.5B
| $287K | 0.01% |
463
-22
| -5% | -$1.09K |
|
981
PUT
Advance Auto Parts
AAP
$3.22B
| $286K | 0.01% |
422
+111
| +36% | +$11.2K |
|
982
PUT
General Motors
GM
$73B
| $286K | 0.01% |
5,440
+1,236
| +29% | +$45.2K |
|
983
CALL
ProShares UltraShort Industrials
SIJ
$5.78M
| $286K | 0.01% |
230
+9
| +4% | +$2.99K |
|
984
CALL
Motorola Solutions
MSI
$67.6B
| $284K | 0.01% |
706
+590
| +509% | +$51.7K |
|
|
DVAX
985
CALL
DELISTED
Dynavax Technologies
DVAX
| $282K | 0.01% |
509
-1,174
| -70% | -$18.6K |
|
|
VTLE
986
DELISTED
Vital Energy
VTLE
| $282K | 0.01% |
1,094
+846
| +341% | +$205K |
|
|
BITA
987
CALL
DELISTED
Bitauto Holdings Limited
BITA
| $282K | 0.01% |
207
-183
| -47% | -$6.61K |
|
|
SCG
988
DELISTED
Scana
SCG
| $282K | 0.01% |
+5,816
| New | +$357K |
|
989
CALL
iShares Silver Trust
SLV
$27.8B
| $281K | 0.01% |
4,487
+2,028
| +82% | +$32.3K |
|
990
CRA International
CRAI
$1.08B
| $280K | 0.01% |
6,837
-11,990
| -64% | -$445K |
|
991
PUT
Ford
F
$56.4B
| $280K | 0.01% |
2,625
-320
| -11% | -$3.61K |
|
992
SBA Communications
SBAC
$18.5B
| $280K | 0.01% |
1,946
-1,593
| -45% | -$227K |
|
993
CALL
Seagate
STX
$207B
| $280K | 0.01% |
3,466
-22
| -0.6% | -$747 |
|
994
CALL
Philip Morris
PM
$298B
| $279K | 0.01% |
914
+57
| +7% | +$6.63K |
|
995
CALL
Prudential Financial
PRU
$40.9B
| $279K | 0.01% |
423
-247
| -37% | -$26.4K |
|
996
PUT
Skyworks Solutions
SWKS
$9.1B
| $278K | 0.01% |
1,262
-246
| -16% | -$25.5K |
|
|
PXD
997
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $278K | 0.01% |
476
-100
| -17% | -$14.4K |
|
998
SiriusXM
SIRI
$10.1B
| $277K | 0.01% |
5,027
+4,694
| +1,410% | +$260K |
|
999
CALL
Arista Networks
ANET
$222B
| $275K | 0.01% |
2,080
-1,776
| -46% | -$18.6K |
|
1000
CALL
Devon Energy
DVN
$52.2B
| $274K | 0.01% |
1,501
-838
| -36% | -$27.2K |
|
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.