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
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1101
Sonoco
SON
$4.71B
| $113K | ﹤0.01% |
2,229
+2,083
| +1,427% | +$106K |
|
1102
Simpson Manufacturing
SSD
$7.85B
| $113K | ﹤0.01% |
673
+585
| +665% | +$98.2K |
|
1103
Medallion Financial
MFIN
$245M
| $112K | ﹤0.01% |
+14,627
| New | +$112K |
|
1104
AXT Inc
AXTI
$168M
| $111K | ﹤0.01% |
32,882
+1,544
| +5% | +$5.21K |
|
1105
Global X Cybersecurity ETF
BUG
$1.13B
| $111K | ﹤0.01% |
3,773
-3,953
| -51% | -$116K |
|
1106
Diageo
DEO
$56.5B
| $111K | ﹤0.01% |
+882
| New | +$111K |
|
1107
Public Storage
PSA
$51.3B
| $111K | ﹤0.01% |
+389
| New | +$111K |
|
1108
Banco Santander
SAN
$149B
| $111K | ﹤0.01% |
+24,139
| New | +$111K |
|
1109
AbCellera Biologics
ABCL
$1.34B
| $110K | ﹤0.01% |
37,185
-16,289
| -30% | -$48.2K |
|
1110
Carlisle Companies
CSL
$15.6B
| $110K | ﹤0.01% |
+273
| New | +$110K |
|
1111
Kulicke & Soffa
KLIC
$2.01B
| $110K | ﹤0.01% |
2,241
+2,155
| +2,506% | +$106K |
|
1112
Kilroy Realty
KRC
$5.11B
| $110K | ﹤0.01% |
3,555
+2,978
| +516% | +$92.1K |
|
|
ACRE
1113
Ares Commercial Real Estate
ACRE
$266M
| $108K | ﹤0.01% |
16,262
-339
| -2% | -$2.25K |
|
|
SRTA
1114
Strata Critical Medical, Inc. Class A Common Stock
SRTA
$353M
| $108K | ﹤0.01% |
31,249
+21,088
| +208% | +$72.9K |
|
1115
Flywire
FLYW
$1.63B
| $108K | ﹤0.01% |
+6,647
| New | +$108K |
|
1116
Moelis & Co
MC
$5.54B
| $108K | ﹤0.01% |
1,909
+1,300
| +213% | +$73.5K |
|
1117
NBT Bancorp
NBTB
$2.27B
| $108K | ﹤0.01% |
2,801
+1,647
| +143% | +$63.5K |
|
1118
Rekor Systems
REKR
$153M
| $108K | ﹤0.01% |
+70,002
| New | +$108K |
|
1119
Fulton Financial
FULT
$3.54B
| $107K | ﹤0.01% |
6,314
+3,422
| +118% | +$58K |
|
1120
Flutter Entertainment
FLUT
$49.5B
| $107K | ﹤0.01% |
+591
| New | +$107K |
|
1121
Alector
ALEC
$278M
| $106K | ﹤0.01% |
23,431
-5,701
| -20% | -$25.8K |
|
1122
Boise Cascade
BCC
$3.2B
| $106K | ﹤0.01% |
+893
| New | +$106K |
|
1123
GraniteShares 2x Short NVDA Daily ETF
NVD
$46.8M
| $105K | ﹤0.01% |
1,904
+1,902
| +95,100% | +$105K |
|
1124
Endava
DAVA
$537M
| $103K | ﹤0.01% |
3,536
-1,060
| -23% | -$30.9K |
|
1125
Defiance Nasdaq 100 Enhanced Options Income ETF
QQQY
$189M
| $103K | ﹤0.01% |
2,311
+978
| +73% | +$43.6K |
|