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
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
Huntsman Corp
HUN
$1.91B
| $439K | ﹤0.01% |
+42,180
| New | +$439K |
|
|
MSTZ
652
T-Rex 2X Inverse MSTR Daily Target ETF
MSTZ
$113M
| $439K | ﹤0.01% |
105,158
+104,465
| +15,074% | +$436K |
|
653
Ingersoll Rand
IR
$32.1B
| $438K | ﹤0.01% |
+5,268
| New | +$438K |
|
654
Dayforce
DAY
$10.9B
| $436K | ﹤0.01% |
7,877
+5,264
| +201% | +$291K |
|
655
AeroVironment
AVAV
$11.7B
| $433K | ﹤0.01% |
1,522
-7,542
| -83% | -$2.15M |
|
656
B&G Foods
BGS
$363M
| $433K | ﹤0.01% |
102,546
+68,485
| +201% | +$289K |
|
657
Cimpress
CMPR
$1.49B
| $433K | ﹤0.01% |
9,229
-2,456
| -21% | -$115K |
|
658
Capri Holdings
CPRI
$2.52B
| $426K | ﹤0.01% |
24,088
-136,920
| -85% | -$2.42M |
|
659
Titan Machinery
TITN
$477M
| $425K | ﹤0.01% |
21,482
+1,370
| +7% | +$27.1K |
|
660
Old Republic International
ORI
$9.9B
| $424K | ﹤0.01% |
+11,031
| New | +$424K |
|
661
Fomento Económico Mexicano
FMX
$30.1B
| $423K | ﹤0.01% |
4,112
+3,329
| +425% | +$342K |
|
662
Boot Barn
BOOT
$5.64B
| $421K | ﹤0.01% |
2,775
-9,956
| -78% | -$1.51M |
|
663
Cadiz
CDZI
$290M
| $420K | ﹤0.01% |
140,474
+89,645
| +176% | +$268K |
|
664
Transocean
RIG
$3.01B
| $420K | ﹤0.01% |
162,430
-71,800
| -31% | -$186K |
|
665
Pathward Financial
CASH
$1.76B
| $416K | ﹤0.01% |
+5,270
| New | +$416K |
|
666
Sabesp
SBS
$15.8B
| $416K | ﹤0.01% |
18,977
+18,827
| +12,551% | +$413K |
|
667
VanEck Uranium + Nuclear Energy ETF
NLR
$2.49B
| $413K | ﹤0.01% |
3,716
+669
| +22% | +$74.4K |
|
668
iShares Semiconductor ETF
SOXX
$13.9B
| $410K | ﹤0.01% |
+1,718
| New | +$410K |
|
669
CAE Inc
CAE
$8.49B
| $408K | ﹤0.01% |
+13,945
| New | +$408K |
|
670
Lands' End
LE
$487M
| $407K | ﹤0.01% |
38,062
+36,280
| +2,036% | +$388K |
|
671
First Interstate BancSystem
FIBK
$3.42B
| $406K | ﹤0.01% |
+14,102
| New | +$406K |
|
672
GeoPark
GPRK
$328M
| $406K | ﹤0.01% |
62,270
+52,355
| +528% | +$341K |
|
673
Larimar Therapeutics
LRMR
$345M
| $405K | ﹤0.01% |
140,424
+140,160
| +53,091% | +$404K |
|
674
Evolent Health
EVH
$1.12B
| $404K | ﹤0.01% |
35,918
+32,142
| +851% | +$362K |
|
675
Ambarella
AMBA
$3.62B
| $403K | ﹤0.01% |
+6,103
| New | +$403K |
|