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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
401
Enovis
ENOV
$1.84B
| $499K | ﹤0.01% |
+9,781
| New | +$499K |
|
402
AXIS Capital
AXS
$7.62B
| $494K | ﹤0.01% |
9,022
-3,947
| -30% | -$216K |
|
403
Spectrum Brands
SPB
$1.38B
| $494K | ﹤0.01% |
+9,033
| New | +$494K |
|
404
General Motors
GM
$55.5B
| $493K | ﹤0.01% |
13,298
+12,319
| +1,258% | +$457K |
|
405
StoneCo
STNE
$4.63B
| $493K | ﹤0.01% |
+12,006
| New | +$493K |
|
406
United Parks & Resorts
PRKS
$2.99B
| $493K | ﹤0.01% |
+19,169
| New | +$493K |
|
|
WUBA
407
DELISTED
58.COM INC
WUBA
| $492K | ﹤0.01% |
7,496
+4,556
| +155% | +$299K |
|
408
Upland Software
UPLD
$70.5M
| $491K | ﹤0.01% |
11,607
+10,722
| +1,212% | +$454K |
|
|
BBBY
409
Bed Bath & Beyond, Inc.
BBBY
$567M
| $490K | ﹤0.01% |
35,724
-85,297
| -70% | -$1.17M |
|
410
Designer Brands
DBI
$231M
| $489K | ﹤0.01% |
+22,043
| New | +$489K |
|
411
Occidental Petroleum
OXY
$45.2B
| $487K | ﹤0.01% |
+7,369
| New | +$487K |
|
|
ACIA
412
DELISTED
Acacia Communications, Inc. Common Stock
ACIA
| $484K | ﹤0.01% |
+8,440
| New | +$484K |
|
413
Essent Group
ESNT
$6.29B
| $483K | ﹤0.01% |
11,134
+11,061
| +15,152% | +$480K |
|
|
KRA
414
DELISTED
Kraton Corporation
KRA
| $483K | ﹤0.01% |
+15,017
| New | +$483K |
|
415
KBR
KBR
$6.4B
| $482K | ﹤0.01% |
+25,273
| New | +$482K |
|
416
iShares MSCI Saudi Arabia ETF
KSA
$577M
| $478K | ﹤0.01% |
+14,375
| New | +$478K |
|
417
Madrigal Pharmaceuticals
MDGL
$9.65B
| $476K | ﹤0.01% |
3,802
-5
| -0.1% | -$626 |
|
418
Blackstone
BX
$133B
| $475K | ﹤0.01% |
13,596
-35,986
| -73% | -$1.26M |
|
|
MDCO
419
DELISTED
Medicines Co
MDCO
| $475K | ﹤0.01% |
+17,013
| New | +$475K |
|
420
Best Buy
BBY
$16.1B
| $472K | ﹤0.01% |
+6,645
| New | +$472K |
|
421
iShares US Home Construction ETF
ITB
$3.35B
| $471K | ﹤0.01% |
13,386
-57,225
| -81% | -$2.01M |
|
422
Appian
APPN
$2.26B
| $470K | ﹤0.01% |
13,664
+2,046
| +18% | +$70.4K |
|
|
CSFL
423
DELISTED
CenterState Bank Corporation Common Stock
CSFL
| $470K | ﹤0.01% |
19,766
-10,880
| -36% | -$259K |
|
|
TCF
424
DELISTED
TCF Financial Corporation Common Stock
TCF
| $469K | ﹤0.01% |
+11,404
| New | +$469K |
|
425
Laureate Education
LAUR
$4.1B
| $465K | ﹤0.01% |
+31,088
| New | +$465K |
|