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 | |
|---|---|---|---|---|---|---|
|
DNB
101
DELISTED
Dun & Bradstreet
DNB
| $1.96M | 0.01% |
13,753
-2,142
| -13% | -$306K |
|
102
PVH
PVH
$4.1B
| $1.96M | 0.01% |
21,075
+18,409
| +691% | +$1.71M |
|
103
MGM Resorts International
MGM
$10.4B
| $1.96M | 0.01% |
80,692
-59,075
| -42% | -$1.43M |
|
|
LSI
104
DELISTED
Life Storage, Inc.
LSI
| $1.93M | 0.01% |
31,062
+24,040
| +342% | +$1.49M |
|
105
iShares Preferred and Income Securities ETF
PFF
$14.4B
| $1.91M | 0.01% |
+55,884
| New | +$1.91M |
|
106
Yum! Brands
YUM
$40.1B
| $1.87M | 0.01% |
20,292
+7,248
| +56% | +$666K |
|
107
Coterra Energy
CTRA
$18.4B
| $1.83M | 0.01% |
82,027
+21,117
| +35% | +$472K |
|
108
Trade Desk
TTD
$26.3B
| $1.83M | 0.01% |
+157,510
| New | +$1.83M |
|
109
Ionis Pharmaceuticals
IONS
$9.64B
| $1.81M | 0.01% |
33,512
+17,823
| +114% | +$963K |
|
110
Freeport-McMoran
FCX
$66.3B
| $1.81M | 0.01% |
175,263
+8,132
| +5% | +$83.8K |
|
111
Kroger
KR
$45.1B
| $1.79M | 0.01% |
64,942
+57,066
| +725% | +$1.57M |
|
112
Vanguard Total Stock Market ETF
VTI
$524B
| $1.78M | 0.01% |
13,973
+9,430
| +208% | +$1.2M |
|
|
WP
113
DELISTED
Worldpay, Inc.
WP
| $1.77M | 0.01% |
23,184
+7,005
| +43% | +$535K |
|
114
Liberty Global Class C
LBTYK
$4.1B
| $1.75M | 0.01% |
84,938
+84,170
| +10,960% | +$1.74M |
|
115
Aon
AON
$80.6B
| $1.75M | 0.01% |
12,007
+5,135
| +75% | +$746K |
|
116
WisdomTree Japan Hedged Equity Fund
DXJ
$3.72B
| $1.74M | 0.01% |
37,555
+8,342
| +29% | +$387K |
|
|
CS
117
DELISTED
Credit Suisse Group
CS
| $1.74M | 0.01% |
160,064
+78,667
| +97% | +$854K |
|
118
VanEck Junior Gold Miners ETF
GDXJ
$6.91B
| $1.74M | 0.01% |
57,535
+9,425
| +20% | +$285K |
|
119
AGNC Investment
AGNC
$10.4B
| $1.72M | 0.01% |
98,143
+74,602
| +317% | +$1.31M |
|
120
Western Digital
WDC
$29.8B
| $1.71M | 0.01% |
61,326
-5,774
| -9% | -$161K |
|
121
Spotify
SPOT
$143B
| $1.71M | 0.01% |
15,073
-9,075
| -38% | -$1.03M |
|
122
Vornado Realty Trust
VNO
$7.55B
| $1.7M | 0.01% |
27,423
+12,759
| +87% | +$791K |
|
123
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$10.7B
| $1.7M | 0.01% |
306,240
+231,915
| +312% | +$1.29M |
|
124
Dropbox
DBX
$7.82B
| $1.67M | ﹤0.01% |
81,924
+68,293
| +501% | +$1.39M |
|
|
CDK
125
DELISTED
CDK Global, Inc.
CDK
| $1.64M | ﹤0.01% |
34,185
+3,257
| +11% | +$156K |
|