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 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
LAC
426
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $1.37M | ﹤0.01% |
46,980
-32,195
| -41% | -$937K |
|
427
Nerdy
NRDY
$160M
| $1.37M | ﹤0.01% |
+303,596
| New | +$1.37M |
|
428
Hasbro
HAS
$11B
| $1.37M | ﹤0.01% |
+13,419
| New | +$1.37M |
|
|
CNR
429
DELISTED
Cornerstone Building Brands, Inc.
CNR
| $1.36M | ﹤0.01% |
78,082
+23,317
| +43% | +$406K |
|
|
SPWR
430
DELISTED
SunPower Corporation Common Stock
SPWR
| $1.36M | ﹤0.01% |
+65,113
| New | +$1.36M |
|
431
Banco Santander
SAN
$145B
| $1.36M | ﹤0.01% |
412,527
+159,397
| +63% | +$524K |
|
|
NSTG
432
DELISTED
NanoString Technologies, Inc.
NSTG
| $1.34M | ﹤0.01% |
31,843
+30,884
| +3,220% | +$1.3M |
|
433
Groupon
GRPN
$930M
| $1.34M | ﹤0.01% |
57,763
+42,331
| +274% | +$980K |
|
434
Vanguard Energy ETF
VDE
$7.21B
| $1.34M | ﹤0.01% |
17,238
+16,153
| +1,489% | +$1.25M |
|
435
Invesco Solar ETF
TAN
$729M
| $1.33M | ﹤0.01% |
17,270
-6,524
| -27% | -$502K |
|
436
Sociedad Química y Minera de Chile
SQM
$11.8B
| $1.33M | ﹤0.01% |
+26,318
| New | +$1.33M |
|
437
iShares MSCI Germany ETF
EWG
$2.4B
| $1.33M | ﹤0.01% |
40,473
+14,484
| +56% | +$475K |
|
|
OTLY
438
Oatly Group
OTLY
$529M
| $1.33M | ﹤0.01% |
8,331
+7,595
| +1,032% | +$1.21M |
|
439
Vermilion Energy
VET
$1.13B
| $1.32M | ﹤0.01% |
105,096
+24,814
| +31% | +$312K |
|
440
Magnite
MGNI
$3.47B
| $1.32M | ﹤0.01% |
+75,473
| New | +$1.32M |
|
441
Clean Energy Fuels
CLNE
$544M
| $1.32M | ﹤0.01% |
214,619
-116,055
| -35% | -$711K |
|
442
Bloomin' Brands
BLMN
$588M
| $1.3M | ﹤0.01% |
61,947
+46,362
| +297% | +$972K |
|
443
Motorola Solutions
MSI
$79.6B
| $1.29M | ﹤0.01% |
4,755
+4,184
| +733% | +$1.14M |
|
444
iShares MSCI Malaysia ETF
EWM
$242M
| $1.29M | ﹤0.01% |
+51,429
| New | +$1.29M |
|
445
SiTime
SITM
$6.43B
| $1.29M | ﹤0.01% |
+4,402
| New | +$1.29M |
|
446
Methanex
MEOH
$2.99B
| $1.28M | ﹤0.01% |
32,416
+25,324
| +357% | +$1M |
|
447
GitLab
GTLB
$8.03B
| $1.28M | ﹤0.01% |
+14,725
| New | +$1.28M |
|
448
ReNew
RNW
$2.78B
| $1.27M | ﹤0.01% |
+163,298
| New | +$1.27M |
|
|
JOYY
449
JOYY Inc. American Depositary Shares
JOYY
$3.28B
| $1.26M | ﹤0.01% |
+27,842
| New | +$1.26M |
|
450
Under Armour Class C
UA
$2.09B
| $1.26M | ﹤0.01% |
69,923
-12,333
| -15% | -$222K |
|