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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
476
Tesla
TSLA
$1.12T
| $394K | ﹤0.01% |
26,490
-55,245
| -68% | -$822K |
|
477
Knowles
KN
$1.85B
| $393K | ﹤0.01% |
21,475
+9,371
| +77% | +$171K |
|
478
Myriad Genetics
MYGN
$642M
| $393K | ﹤0.01% |
14,176
-2,788
| -16% | -$77.3K |
|
479
Beazer Homes USA
BZH
$758M
| $389K | ﹤0.01% |
+40,508
| New | +$389K |
|
480
Canadian National Railway
CNI
$57.7B
| $383K | ﹤0.01% |
4,148
+1,596
| +63% | +$147K |
|
481
Interactive Brokers
IBKR
$27.8B
| $381K | ﹤0.01% |
28,136
-18,568
| -40% | -$251K |
|
|
DFRG
482
DELISTED
Del Frisco's Restaurant Group, Inc. Common Stock
DFRG
| $381K | ﹤0.01% |
47,892
+44,263
| +1,220% | +$352K |
|
483
Cooper Companies
COO
$13.5B
| $379K | ﹤0.01% |
+4,504
| New | +$379K |
|
484
Roper Technologies
ROP
$55.2B
| $379K | ﹤0.01% |
+1,037
| New | +$379K |
|
485
Ambac
AMBC
$415M
| $376K | ﹤0.01% |
22,371
+18,168
| +432% | +$305K |
|
486
MSC Industrial Direct
MSM
$5.1B
| $376K | ﹤0.01% |
5,064
+1,594
| +46% | +$118K |
|
487
AstraZeneca
AZN
$251B
| $373K | ﹤0.01% |
+9,058
| New | +$373K |
|
488
3D Systems Corporation
DDD
$272M
| $372K | ﹤0.01% |
+40,956
| New | +$372K |
|
489
Genworth Financial
GNW
$3.51B
| $370K | ﹤0.01% |
99,843
+70,981
| +246% | +$263K |
|
|
CBAY
490
DELISTED
Cymabay Therapeutics
CBAY
| $369K | ﹤0.01% |
51,645
+46,496
| +903% | +$332K |
|
491
Amicus Therapeutics
FOLD
$2.45B
| $368K | ﹤0.01% |
+29,489
| New | +$368K |
|
492
Entergy
ETR
$39.5B
| $362K | ﹤0.01% |
7,036
-5,826
| -45% | -$300K |
|
493
Heron Therapeutics
HRTX
$195M
| $362K | ﹤0.01% |
19,523
+10,391
| +114% | +$193K |
|
|
S
494
DELISTED
Sprint Corporation
S
| $360K | ﹤0.01% |
+54,877
| New | +$360K |
|
495
SPDR S&P Oil & Gas Equipment & Services ETF
XES
$157M
| $358K | ﹤0.01% |
3,731
+2,312
| +163% | +$222K |
|
|
PXD
496
DELISTED
Pioneer Natural Resource Co.
PXD
| $358K | ﹤0.01% |
+2,327
| New | +$358K |
|
497
Factset
FDS
$13.7B
| $356K | ﹤0.01% |
+1,245
| New | +$356K |
|
|
REV
498
DELISTED
Revlon, Inc.
REV
| $355K | ﹤0.01% |
18,372
-3,675
| -17% | -$71K |
|
499
Appian
APPN
$2.3B
| $354K | ﹤0.01% |
9,823
-3,841
| -28% | -$138K |
|
500
Freshpet
FRPT
$2.61B
| $353K | ﹤0.01% |
7,765
+5,498
| +243% | +$250K |
|