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 | |
|---|---|---|---|---|---|---|
1826
Madison Square Garden
MSGS
$9.54B
| $88K | ﹤0.01% |
+580
| New | +$87.7K |
|
1827
NWPX Infrastructure Inc
NWPX
$1.25B
| $88K | ﹤0.01% |
4,652
+3,912
| +529% | +$65.2K |
|
1828
Vanguard Mid-Cap ETF
VO
$106B
| $88K | ﹤0.01% |
+2,400
| New | +$86.6K |
|
|
ADXS
1829
PUT
DELISTED
Advaxis Inc
ADXS
| $88K | ﹤0.01% |
16
-3
| -16% | -$277 |
|
|
ANDV
1830
PUT
DELISTED
Andeavor
ANDV
| $88K | ﹤0.01% |
1,802
+183
| +11% | +$18K |
|
|
SFR
1831
DELISTED
Starwood Waypoint Homes
SFR
| $88K | ﹤0.01% |
+2,427
| New | +$86.7K |
|
1832
PUT
Accenture
ACN
$89.9B
| $87K | ﹤0.01% |
919
+719
| +360% | +$93.7K |
|
1833
Alarm.com
ALRM
$2.56B
| $87K | ﹤0.01% |
+1,934
| New | +$80K |
|
1834
Babcock & Wilcox
BW
$1.43B
| $87K | ﹤0.01% |
2,635
-179
| -6% | -$11K |
|
1835
PUT
Fortinet
FTNT
$112B
| $87K | ﹤0.01% |
1,755
+170
| +11% | +$1.29K |
|
1836
CALL
Generac Holdings
GNRC
$11.9B
| $87K | ﹤0.01% |
237
+202
| +577% | +$7.94K |
|
1837
CALL
Matador Resources
MTDR
$6.31B
| $87K | ﹤0.01% |
437
+60
| +16% | +$1.43K |
|
1838
CALL
Nutanix
NTNX
$14.9B
| $87K | ﹤0.01% |
431
+39
| +10% | +$853 |
|
1839
CALL
PPG Industries
PPG
$25.9B
| $87K | ﹤0.01% |
315
+182
| +137% | +$19.4K |
|
1840
Sony
SONY
$123B
| $87K | ﹤0.01% |
+11,730
| New | +$91.9K |
|
1841
CALL
TE Connectivity
TEL
$58.8B
| $87K | ﹤0.01% |
463
+445
| +2,472% | +$35.8K |
|
1842
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $87K | ﹤0.01% |
90
+55
| +157% | +$6.33K |
|
|
USG
1843
CALL
DELISTED
Usg
USG
| $87K | ﹤0.01% |
319
+63
| +25% | +$1.82K |
|
|
PEI
1844
DELISTED
Pennsylvania Real Estate Investment Trust
PEI
| $87K | ﹤0.01% |
557
-156
| -22% | -$25.6K |
|
|
CRESY
1845
Cresud
CRESY
$794M
| $86K | ﹤0.01% |
5,192
+1,843
| +55% | +$31.1K |
|
1846
Consolidated Water Co
CWCO
$469M
| $86K | ﹤0.01% |
+6,796
| New | +$84.9K |
|
1847
CALL
EQT Corp
EQT
$33.2B
| $86K | ﹤0.01% |
783
+557
| +246% | +$18.9K |
|
1848
CALL
Grand Canyon Education
LOPE
$3.71B
| $86K | ﹤0.01% |
34
+7
| +26% | +$561 |
|
1849
CALL
LPL Financial
LPLA
$26.3B
| $86K | ﹤0.01% |
241
-236
| -49% | -$10.9K |
|
1850
Manhattan Associates
MANH
$8.97B
| $86K | ﹤0.01% |
2,081
+1,663
| +398% | +$72.8K |
|
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.