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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
726
Gerdau
GGB
$6.17B
| $155K | ﹤0.01% |
52,155
-27,011
| -34% | -$80.3K |
|
|
AMRS
727
DELISTED
Amyris Inc.
AMRS
| $155K | ﹤0.01% |
+46,613
| New | +$155K |
|
|
NFX
728
DELISTED
Newfield Exploration
NFX
| $155K | ﹤0.01% |
+10,624
| New | +$155K |
|
729
TG Therapeutics
TGTX
$5.05B
| $154K | ﹤0.01% |
+37,658
| New | +$154K |
|
|
PER
730
DELISTED
SANDRIDGE PERMIAN TRUST
PER
| $154K | ﹤0.01% |
81,677
+34,134
| +72% | +$64.4K |
|
|
USX
731
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $153K | ﹤0.01% |
27,293
+23,629
| +645% | +$132K |
|
|
VNTR
732
DELISTED
Venator Materials PLC
VNTR
| $153K | ﹤0.01% |
36,684
+21,936
| +149% | +$91.5K |
|
733
Applied Materials
AMAT
$130B
| $150K | ﹤0.01% |
4,608
-65,640
| -93% | -$2.14M |
|
734
Entegris
ENTG
$12B
| $149K | ﹤0.01% |
+5,343
| New | +$149K |
|
735
Atlassian
TEAM
$45.7B
| $149K | ﹤0.01% |
1,684
-22,758
| -93% | -$2.01M |
|
|
AEL
736
DELISTED
American Equity Investment Life Holding Company
AEL
| $149K | ﹤0.01% |
5,359
-3,454
| -39% | -$96K |
|
737
Kura Oncology
KURA
$709M
| $148K | ﹤0.01% |
10,598
+6,008
| +131% | +$83.9K |
|
738
ADT
ADT
$7.05B
| $147K | ﹤0.01% |
+24,472
| New | +$147K |
|
|
LMNX
739
DELISTED
Luminex Corp
LMNX
| $147K | ﹤0.01% |
6,387
-459
| -7% | -$10.6K |
|
740
Novavax
NVAX
$1.29B
| $146K | ﹤0.01% |
3,977
+2,780
| +232% | +$102K |
|
|
MEET
741
DELISTED
The Meet Group, Inc. Common Stock
MEET
| $146K | ﹤0.01% |
+31,578
| New | +$146K |
|
742
Banco Macro
BMA
$3.03B
| $145K | ﹤0.01% |
+3,283
| New | +$145K |
|
743
Banco Santander
SAN
$148B
| $145K | ﹤0.01% |
+33,910
| New | +$145K |
|
|
PENG
744
Penguin Solutions, Inc. Ordinary Shares
PENG
$1.34B
| $143K | ﹤0.01% |
9,652
-2,770
| -22% | -$41K |
|
745
Skyworks Solutions
SWKS
$10.9B
| $142K | ﹤0.01% |
2,131
-17,901
| -89% | -$1.19M |
|
746
Chemours
CC
$2.44B
| $140K | ﹤0.01% |
+4,987
| New | +$140K |
|
747
Invesco DB US Dollar Index Bullish Fund
UUP
$162M
| $140K | ﹤0.01% |
+5,516
| New | +$140K |
|
748
ProShares UltraShort Yen
YCS
$30.7M
| $140K | ﹤0.01% |
+7,616
| New | +$140K |
|
749
Apple Hospitality REIT
APLE
$2.97B
| $139K | ﹤0.01% |
+9,781
| New | +$139K |
|
750
Arrowhead Research
ARWR
$3.99B
| $139K | ﹤0.01% |
11,231
+4,257
| +61% | +$52.7K |
|