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 | |
|---|---|---|---|---|---|---|
926
AerSale
ASLE
$396M
| $341K | ﹤0.01% |
+19,231
| New | +$341K |
|
927
Synopsys
SNPS
$81.4B
| $341K | ﹤0.01% |
+928
| New | +$341K |
|
928
Jamf
JAMF
$1.4B
| $340K | ﹤0.01% |
+8,954
| New | +$340K |
|
929
Zions Bancorporation
ZION
$8.56B
| $338K | ﹤0.01% |
+5,364
| New | +$338K |
|
|
JOAN
930
DELISTED
JOANN, Inc. Common Stock
JOAN
| $338K | ﹤0.01% |
+32,638
| New | +$338K |
|
931
Black Stone Minerals
BSM
$2.61B
| $337K | ﹤0.01% |
+32,716
| New | +$337K |
|
932
Caleres
CAL
$532M
| $336K | ﹤0.01% |
14,837
+12,404
| +510% | +$281K |
|
933
Jefferies Financial Group
JEF
$13.5B
| $336K | ﹤0.01% |
+9,081
| New | +$336K |
|
934
Rackspace Technology
RXT
$357M
| $335K | ﹤0.01% |
24,912
+22,104
| +787% | +$297K |
|
935
Travelers Companies
TRV
$61.3B
| $335K | ﹤0.01% |
+2,144
| New | +$335K |
|
|
CKPT
936
DELISTED
Checkpoint Therapeutics
CKPT
| $334K | ﹤0.01% |
10,747
+9,501
| +763% | +$295K |
|
937
National Storage Affiliates Trust
NSA
$2.49B
| $333K | ﹤0.01% |
+4,826
| New | +$333K |
|
|
XM
938
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $332K | ﹤0.01% |
9,403
-17,472
| -65% | -$617K |
|
|
ARCH
939
DELISTED
Arch Resources, Inc.
ARCH
| $332K | ﹤0.01% |
3,636
+3,317
| +1,040% | +$303K |
|
940
MRC Global
MRC
$1.24B
| $330K | ﹤0.01% |
+47,997
| New | +$330K |
|
941
Payoneer
PAYO
$2.39B
| $329K | ﹤0.01% |
44,775
-9,016
| -17% | -$66.2K |
|
942
Welltower
WELL
$112B
| $329K | ﹤0.01% |
+3,846
| New | +$329K |
|
943
Global X FinTech ETF
FINX
$301M
| $328K | ﹤0.01% |
8,198
+7,449
| +995% | +$298K |
|
944
GameStop
GME
$11.1B
| $328K | ﹤0.01% |
8,844
-73,972
| -89% | -$2.74M |
|
945
Lufax Holding
LU
$2.62B
| $327K | ﹤0.01% |
+14,521
| New | +$327K |
|
946
Appian
APPN
$2.3B
| $324K | ﹤0.01% |
4,976
+467
| +10% | +$30.4K |
|
947
Targa Resources
TRGP
$35.2B
| $324K | ﹤0.01% |
6,206
-21,394
| -78% | -$1.12M |
|
|
MGI
948
DELISTED
MoneyGram International, Inc. New
MGI
| $324K | ﹤0.01% |
41,079
-61,417
| -60% | -$484K |
|
949
Real Estate Select Sector SPDR Fund
XLRE
$7.84B
| $323K | ﹤0.01% |
+6,252
| New | +$323K |
|
950
Molina Healthcare
MOH
$10.2B
| $322K | ﹤0.01% |
+1,014
| New | +$322K |
|