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 |
Apple
AAPL
|
$32.9M |
| 2 |
Gilead Sciences
GILD
|
$30.1M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$16.2M |
Top Sells
Sector Composition
| 1 | Consumer Discretionary | 23.68% |
| 2 | Technology | 19.11% |
| 3 | Healthcare | 14.31% |
| 4 | Energy | 9.3% |
| 5 | Communication Services | 8.24% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
AT&T
T
$212B
| $212K | 0.03% |
+8,374
| New | +$212K |
|
302
YPF
YPF
$12.1B
| $211K | 0.03% |
+7,984
| New | +$211K |
|
|
FUEL
303
DELISTED
Rocket Fuel Inc.
FUEL
| $211K | 0.03% |
+13,094
| New | +$211K |
|
304
Dover
DOV
$24.4B
| $210K | 0.03% |
+3,622
| New | +$210K |
|
305
Puma Biotechnology
PBYI
$253M
| $210K | 0.03% |
+1,109
| New | +$210K |
|
|
YOKU
306
DELISTED
YOUKU TUDOU INC.(CAYMAN ISLS)
YOKU
| $210K | 0.03% |
+11,781
| New | +$210K |
|
307
Boyd Gaming
BYD
$6.93B
| $209K | 0.03% |
+16,354
| New | +$209K |
|
308
Signet Jewelers
SIG
$3.85B
| $209K | 0.03% |
+1,586
| New | +$209K |
|
|
RPRX
309
DELISTED
Repros Therapeutics Inc.
RPRX
| $208K | 0.03% |
+20,902
| New | +$208K |
|
310
Celldex Therapeutics
CLDX
$1.52B
| $206K | 0.03% |
+751
| New | +$206K |
|
311
KLA
KLAC
$119B
| $206K | 0.03% |
+2,935
| New | +$206K |
|
312
iShares TIPS Bond ETF
TIP
$13.6B
| $206K | 0.03% |
+1,843
| New | +$206K |
|
|
ACHN
313
DELISTED
Achillion Pharmaceuticals, Inc.
ACHN
| $205K | 0.02% |
+16,766
| New | +$205K |
|
314
Abercrombie & Fitch
ANF
$4.49B
| $204K | 0.02% |
+7,124
| New | +$204K |
|
315
ICICI Bank
IBN
$113B
| $203K | 0.02% |
+19,345
| New | +$203K |
|
|
BGC
316
DELISTED
General Cable Corporation
BGC
| $201K | 0.02% |
+13,498
| New | +$201K |
|
317
Jones Lang LaSalle
JLL
$14.8B
| $199K | 0.02% |
+1,328
| New | +$199K |
|
|
GAP
318
The Gap, Inc.
GAP
$8.83B
| $199K | 0.02% |
+4,721
| New | +$199K |
|
319
CenterPoint Energy
CNP
$24.7B
| $197K | 0.02% |
+8,411
| New | +$197K |
|
320
DaVita
DVA
$9.86B
| $197K | 0.02% |
+2,606
| New | +$197K |
|
|
EBIX
321
DELISTED
Ebix Inc
EBIX
| $197K | 0.02% |
+11,615
| New | +$197K |
|
322
Jefferies Financial Group
JEF
$13.1B
| $195K | 0.02% |
+9,730
| New | +$195K |
|
323
Barclays
BCS
$69.1B
| $194K | 0.02% |
+13,902
| New | +$194K |
|
|
ALXN
324
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $194K | 0.02% |
+1,048
| New | +$194K |
|
|
MHR
325
DELISTED
MAGNUM HUNTER RESOURCES CORP (DEL)
MHR
| $193K | 0.02% |
+61,461
| New | +$193K |
|