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 | |
|---|---|---|---|---|---|---|
101
Teva Pharmaceuticals
TEVA
$36.5B
| $4.23M | 0.17% |
240,285
+198,965
| +482% | +$4.48M |
|
102
Honeywell
HON
$72.8B
| $4.11M | 0.17% |
+32,065
| New | +$3.98M |
|
|
103
Baidu
BIDU
$36.8B
| $4.06M | 0.17% |
16,391
-88,635
| -84% | -$19.3M |
|
|
XYZ
104
Block Inc
XYZ
$47.8B
| $4M | 0.16% |
138,698
+29,313
| +27% | +$767K |
|
|
APC
105
DELISTED
Anadarko Petroleum
APC
| $3.99M | 0.16% |
81,642
+8,073
| +11% | +$356K |
|
106
iShares Biotechnology ETF
IBB
$9.37B
| $3.86M | 0.16% |
34,680
+20,496
| +145% | +$2.19M |
|
107
Humana
HUM
$48.5B
| $3.84M | 0.16% |
15,777
+3,927
| +33% | +$962K |
|
108
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.42B
| $3.75M | 0.15% |
57,777
-87,108
| -60% | -$4.86M |
|
109
General Motors
GM
$71.7B
| $3.67M | 0.15% |
90,832
-126,525
| -58% | -$4.62M |
|
110
First Solar
FSLR
$22.1B
| $3.63M | 0.15% |
+79,053
| New | +$3.67M |
|
|
PXD
111
DELISTED
Pioneer Natural Resource Co.
PXD
| $3.55M | 0.15% |
24,086
+16,479
| +217% | +$2.37M |
|
112
CALL
Visa
V
$677B
| $3.44M | 0.14% |
3,900
+236
| +6% | +$23.9K |
|
113
CALL
Gilead Sciences
GILD
$162B
| $3.44M | 0.14% |
8,216
+1,027
| +14% | +$78.5K |
|
114
Aptiv
APTV
$12.3B
| $3.35M | 0.14% |
34,058
+22,103
| +185% | +$2.09M |
|
115
Yelp
YELP
$1.42B
| $3.35M | 0.14% |
77,390
-64,961
| -46% | -$2.51M |
|
116
Hewlett Packard
HPE
$61.9B
| $3.32M | 0.14% |
+225,580
| New | +$3.08M |
|
|
117
PUT
Teva Pharmaceuticals
TEVA
$36.5B
| $3.32M | 0.14% |
3,905
+449
| +13% | +$10.1K |
|
118
PUT
Meta Platforms (Facebook)
META
$1.63T
| $3.31M | 0.14% |
13,929
+1,144
| +9% | +$191K |
|
|
LNW
119
DELISTED
Light & Wonder
LNW
| $3.3M | 0.13% |
+71,933
| New | +$2.51M |
|
120
PUT
NetEase
NTES
$82.9B
| $3.29M | 0.13% |
9,060
+1,140
| +14% | +$65.5K |
|
121
Advanced Micro Devices
AMD
$888B
| $3.18M | 0.13% |
249,220
-267,517
| -52% | -$3.49M |
|
122
CALL
Mastercard
MA
$476B
| $3.17M | 0.13% |
2,205
-889
| -29% | -$118K |
|
123
CALL
Microsoft
MSFT
$2.95T
| $3.16M | 0.13% |
8,032
-2,148
| -21% | -$157K |
|
124
Radware
RDWR
$1.26B
| $3.15M | 0.13% |
186,663
+60,464
| +48% | +$1.05M |
|
125
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$233M
| $3.13M | 0.13% |
+12
| New | +$4.61M |
|
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.