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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
351
Exelixis
EXEL
$10.2B
| $386K | 0.03% |
+30,210
| New | +$386K |
|
|
JOYY
352
JOYY Inc. American Depositary Shares
JOYY
$3.21B
| $384K | 0.03% |
7,212
-2,115
| -23% | -$113K |
|
|
MNDT
353
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $383K | 0.03% |
26,017
-71,625
| -73% | -$1.05M |
|
354
Acadia Healthcare
ACHC
$2.19B
| $381K | 0.03% |
7,691
-7,307
| -49% | -$362K |
|
355
Travelers Companies
TRV
$62B
| $381K | 0.03% |
3,327
+2,147
| +182% | +$246K |
|
|
ZEN
356
DELISTED
ZENDESK INC
ZEN
| $380K | 0.03% |
12,391
+1,606
| +15% | +$49.3K |
|
357
Fomento Económico Mexicano
FMX
$29.6B
| $378K | 0.03% |
+4,114
| New | +$378K |
|
|
FGL
358
DELISTED
Fidelity & Guaranty Life
FGL
| $376K | 0.03% |
16,230
+4,827
| +42% | +$112K |
|
359
Galicia Financial Group
GGAL
$6.44B
| $375K | 0.03% |
+12,074
| New | +$375K |
|
|
DD
360
DELISTED
Du Pont De Nemours E I
DD
| $375K | 0.03% |
5,603
+3,103
| +124% | +$208K |
|
361
Tronox
TROX
$710M
| $374K | 0.03% |
39,976
-16,070
| -29% | -$150K |
|
362
Cencora
COR
$56.7B
| $373K | 0.03% |
4,619
+634
| +16% | +$51.2K |
|
|
DST
363
DELISTED
DST Systems Inc.
DST
| $373K | 0.03% |
6,338
-10,472
| -62% | -$616K |
|
364
VanEck Agribusiness ETF
MOO
$625M
| $372K | 0.03% |
+7,447
| New | +$372K |
|
|
LL
365
DELISTED
LL Flooring Holdings, Inc.
LL
| $372K | 0.03% |
+18,945
| New | +$372K |
|
366
Eldorado Gold
EGO
$5.31B
| $371K | 0.03% |
18,919
+14,567
| +335% | +$286K |
|
|
SVU
367
DELISTED
SUPERVALU Inc.
SVU
| $365K | 0.02% |
10,473
+5,084
| +94% | +$177K |
|
368
Hologic
HOLX
$14.8B
| $363K | 0.02% |
9,365
-3,125
| -25% | -$121K |
|
369
iShares Russell 1000 Growth ETF
IWF
$117B
| $363K | 0.02% |
3,490
+3,302
| +1,756% | +$343K |
|
370
American Electric Power
AEP
$57.8B
| $362K | 0.02% |
5,644
-320
| -5% | -$20.5K |
|
371
Precigen
PGEN
$1.3B
| $361K | 0.02% |
+13,020
| New | +$361K |
|
|
ATVI
372
DELISTED
Activision Blizzard Inc.
ATVI
| $361K | 0.02% |
+8,151
| New | +$361K |
|
373
RH
RH
$4.7B
| $357K | 0.02% |
+10,345
| New | +$357K |
|
|
KITE
374
DELISTED
Kite Pharma, Inc.
KITE
| $357K | 0.02% |
+6,394
| New | +$357K |
|
375
VEON
VEON
$3.8B
| $356K | 0.02% |
4,099
+3,305
| +416% | +$287K |
|