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 | |
|---|---|---|---|---|---|---|
|
XL
3051
PUT
DELISTED
XL Group Ltd.
XL
| $23K | ﹤0.01% |
353
+335
| +1,861% | +$14.3K |
|
|
VEDL
3052
DELISTED
Vedanta Limited American Depostary Shares (Each representing four equity shares)
VEDL
| $23K | ﹤0.01% |
1,235
-3,649
| -75% | -$67.3K |
|
|
AL
3053
CALL
DELISTED
Air Lease Corp
AL
| $22K | ﹤0.01% |
205
-112
| -35% | -$4.47K |
|
3054
CALL
Avery Dennison
AVY
$12.3B
| $22K | ﹤0.01% |
12
-95
| -89% | -$8.94K |
|
3055
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $22K | ﹤0.01% |
599
+208
| +53% | +$1.06K |
|
3056
CALL
Cardinal Health
CAH
$53.4B
| $22K | ﹤0.01% |
339
-284
| -46% | -$20.1K |
|
3057
PUT
Chubb
CB
$140B
| $22K | ﹤0.01% |
109
+78
| +252% | +$11.3K |
|
|
FL
3058
CALL
DELISTED
Foot Locker
FL
| $22K | ﹤0.01% |
247
-43
| -15% | -$1.81K |
|
3059
PUT
Henry Schein
HSIC
$9.74B
| $22K | ﹤0.01% |
236
+200
| +556% | +$13.6K |
|
3060
CALL
Inovio Pharmaceuticals
INO
$79.8M
| $22K | ﹤0.01% |
26
-9
| -26% | -$670 |
|
3061
CALL
Koppers
KOP
$966M
| $22K | ﹤0.01% |
53
+42
| +382% | +$1.63K |
|
|
MAG
3062
PUT
DELISTED
MAG Silver
MAG
| $22K | ﹤0.01% |
168
+54
| +47% | +$682 |
|
3063
PUT
Motorola Solutions
MSI
$69.4B
| $22K | ﹤0.01% |
170
-196
| -54% | -$17.2K |
|
3064
Nordic American Tanker
NAT
$1.37B
| $22K | ﹤0.01% |
4,306
-3,696
| -46% | -$20.3K |
|
3065
PUT
Palisade Bio
PALI
$339M
| – | – |
0
| – | – |
|
3066
RE/MAX Holdings
RMAX
$200M
| $22K | ﹤0.01% |
358
+183
| +105% | +$11K |
|
3067
CALL
Rapid7
RPD
$634M
| $22K | ﹤0.01% |
637
+29
| +5% | +$482 |
|
3068
Sanmina
SANM
$11.2B
| $22K | ﹤0.01% |
595
-846
| -59% | -$31.6K |
|
3069
SPX Corp
SPXC
$11B
| $22K | ﹤0.01% |
+753
| New | +$19.8K |
|
3070
PUT
STMicroelectronics
STM
$46B
| $22K | ﹤0.01% |
1,023
+593
| +138% | +$10.2K |
|
3071
PUT
Sunoco
SUN
$14.2B
| $22K | ﹤0.01% |
364
+239
| +191% | +$7.44K |
|
3072
PUT
Teladoc Health
TDOC
$1.58B
| $22K | ﹤0.01% |
+104
| New | +$3.41K |
|
|
TGI
3073
DELISTED
Triumph Group
TGI
| $22K | ﹤0.01% |
+752
| New | +$21.5K |
|
3074
CALL
Vericel Corp
VCEL
$2.3B
| $22K | ﹤0.01% |
+170
| New | +$652 |
|
3075
CALL
Voya Financial
VOYA
$8.94B
| $22K | ﹤0.01% |
128
+56
| +78% | +$2.15K |
|
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.