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
| 1 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
XLNX
201
DELISTED
Xilinx Inc
XLNX
| $483K | 0.06% |
+11,437
| New | +$483K |
|
|
CIE
202
DELISTED
Cobalt International Energy, Inc
CIE
| $482K | 0.06% |
3,422
-768
| -18% | -$108K |
|
203
ProShares UltraShort QQQ
QID
$274M
| $470K | 0.05% |
+159
| New | +$470K |
|
|
SUNE
204
DELISTED
SUNEDISON, INC COM
SUNE
| $464K | 0.05% |
19,365
-49,566
| -72% | -$1.19M |
|
205
Hershey
HSY
$37.6B
| $463K | 0.05% |
+4,594
| New | +$463K |
|
206
Viatris
VTRS
$12B
| $463K | 0.05% |
7,816
+285
| +4% | +$16.9K |
|
207
Fossil Group
FOSL
$184M
| $462K | 0.05% |
5,610
+4,113
| +275% | +$339K |
|
208
Consolidated Edison
ED
$35.3B
| $461K | 0.05% |
7,569
+3,790
| +100% | +$231K |
|
209
Ambarella
AMBA
$3.44B
| $457K | 0.05% |
+6,040
| New | +$457K |
|
210
Amicus Therapeutics
FOLD
$2.47B
| $456K | 0.05% |
42,001
+28,561
| +213% | +$310K |
|
|
POM
211
DELISTED
PEPCO HOLDINGS, INC.
POM
| $456K | 0.05% |
+17,005
| New | +$456K |
|
212
Northern Trust
NTRS
$24.7B
| $455K | 0.05% |
6,545
+4,788
| +273% | +$333K |
|
213
AutoZone
AZO
$70.8B
| $453K | 0.05% |
+665
| New | +$453K |
|
214
Herbalife
HLF
$1.04B
| $450K | 0.05% |
21,072
+20,772
| +6,924% | +$444K |
|
215
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$29.6B
| $450K | 0.05% |
+3,700
| New | +$450K |
|
216
Restaurant Brands International
QSR
$20.4B
| $446K | 0.05% |
+11,621
| New | +$446K |
|
217
Toyota
TM
$258B
| $445K | 0.05% |
+3,185
| New | +$445K |
|
|
BITA
218
DELISTED
Bitauto Holdings Limited
BITA
| $435K | 0.05% |
8,550
+7,640
| +840% | +$389K |
|
219
CF Industries
CF
$13.6B
| $433K | 0.05% |
7,640
-30,005
| -80% | -$1.7M |
|
220
Best Buy
BBY
$16.3B
| $429K | 0.05% |
11,377
+9,902
| +671% | +$373K |
|
221
Middleby
MIDD
$7.19B
| $428K | 0.05% |
+4,177
| New | +$428K |
|
|
MCF
222
DELISTED
Contango Oil & Gas Co.
MCF
| $427K | 0.05% |
19,419
-1,493
| -7% | -$32.8K |
|
|
BHI
223
DELISTED
Baker Hughes
BHI
| $426K | 0.05% |
6,704
-5,953
| -47% | -$378K |
|
|
ZINC
224
DELISTED
HORSEHEAD HLDG CORP COM STK (DE)
ZINC
| $425K | 0.05% |
33,633
+31,848
| +1,784% | +$402K |
|
225
Jazz Pharmaceuticals
JAZZ
$7.77B
| $424K | 0.05% |
2,456
+2,335
| +1,930% | +$403K |
|