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 |
Amazon
AMZN
|
+$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$26.1M |
| 4 |
Booking.com
BKNG
|
+$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$42.8M |
| 2 |
Amgen
AMGN
|
+$32.3M |
| 3 |
Baidu
BIDU
|
+$21.9M |
| 4 |
Micron Technology
MU
|
+$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
+$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
Alaunos Therapeutics
TCRT
$4.83M
| $193K | 0.01% |
+210
| New | +$193K |
|
652
Direxion Daily Energy Bull 2X Shares
ERX
$217M
| $192K | 0.01% |
642
-2,389
| -79% | -$714K |
|
|
EBSB
653
DELISTED
Meridian Bancorp, Inc.
EBSB
| $192K | 0.01% |
10,298
+5,362
| +109% | +$100K |
|
|
WLL
654
DELISTED
Whiting Petroleum Corporation
WLL
| $192K | 0.01% |
117
+8
| +7% | +$13.1K |
|
655
Guess, Inc.
GES
$880M
| $191K | 0.01% |
+11,257
| New | +$191K |
|
|
CHU
656
DELISTED
China Unicom (HONG KONG) Limited
CHU
| $191K | 0.01% |
13,640
-17,833
| -57% | -$250K |
|
657
Hartford Financial Services
HIG
$36.7B
| $190K | 0.01% |
3,435
-10,226
| -75% | -$566K |
|
658
Fox Factory Holding Corp
FOXF
$1.24B
| $189K | 0.01% |
4,407
+4,018
| +1,033% | +$172K |
|
659
Ryder
R
$7.67B
| $189K | 0.01% |
2,238
+1,554
| +227% | +$131K |
|
660
Shake Shack
SHAK
$3.93B
| $189K | 0.01% |
5,704
+3,298
| +137% | +$109K |
|
|
AVP
661
DELISTED
Avon Products, Inc.
AVP
| $189K | 0.01% |
+81,408
| New | +$189K |
|
|
AMID
662
DELISTED
American Midstream Partners, LP
AMID
| $189K | 0.01% |
13,885
-2,229
| -14% | -$30.3K |
|
663
Vanda Pharmaceuticals
VNDA
$269M
| $188K | 0.01% |
+10,550
| New | +$188K |
|
|
ATRS
664
DELISTED
Antares Pharma, Inc.
ATRS
| $188K | 0.01% |
58,295
+8,664
| +17% | +$27.9K |
|
665
Essent Group
ESNT
$6.21B
| $187K | 0.01% |
4,630
-3,197
| -41% | -$129K |
|
666
Intrepid Potash
IPI
$390M
| $187K | 0.01% |
4,296
+1,436
| +50% | +$62.5K |
|
667
Global X MSCI Greece ETF
GREK
$304M
| $185K | 0.01% |
6,524
+2,644
| +68% | +$75K |
|
668
Pegasystems
PEGA
$9.84B
| $185K | 0.01% |
6,444
+484
| +8% | +$13.9K |
|
669
Wolfspeed
WOLF
$285M
| $185K | 0.01% |
6,597
-5,448
| -45% | -$153K |
|
670
Varex Imaging
VREX
$485M
| $184K | 0.01% |
+5,443
| New | +$184K |
|
|
JJC
671
DELISTED
iPath Bloomberg Copper Subindex Total Return ETN due October 22, 2037
JJC
| $184K | 0.01% |
5,486
+5,009
| +1,050% | +$168K |
|
672
Brink's
BCO
$4.79B
| $183K | 0.01% |
2,181
-1,012
| -32% | -$84.9K |
|
673
iShares Russell Mid-Cap Growth ETF
IWP
$20.6B
| $183K | 0.01% |
3,242
-462
| -12% | -$26.1K |
|
|
PGNX
674
DELISTED
Progenics Pharmaceuticals Inc
PGNX
| $182K | 0.01% |
24,812
+22,544
| +994% | +$165K |
|
675
Odyssey Marine Exploration
OMEX
$72.3M
| $181K | 0.01% |
41,718
+39,213
| +1,565% | +$170K |
|