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 | |
|---|---|---|---|---|---|---|
101
Automatic Data Processing
ADP
$121B
| $2.14M | 0.01% |
12,970
+2,534
| +24% | +$419K |
|
102
Progressive
PGR
$145B
| $2.14M | 0.01% |
26,813
-21,973
| -45% | -$1.76M |
|
103
iShares Expanded Tech-Software Sector ETF
IGV
$9.77B
| $2.14M | 0.01% |
9,793
+5,788
| +145% | +$1.26M |
|
104
Prologis
PLD
$103B
| $2.13M | 0.01% |
26,618
+12,169
| +84% | +$975K |
|
105
Adient
ADNT
$1.97B
| $2.1M | 0.01% |
86,431
+73,940
| +592% | +$1.79M |
|
106
Cardinal Health
CAH
$36B
| $2.01M | 0.01% |
42,686
-6,810
| -14% | -$321K |
|
107
Eagle Materials
EXP
$7.27B
| $1.99M | 0.01% |
+21,436
| New | +$1.99M |
|
108
Ventas
VTR
$30.7B
| $1.98M | 0.01% |
28,999
+8,294
| +40% | +$567K |
|
109
iShares MSCI Emerging Markets ETF
EEM
$19B
| $1.98M | 0.01% |
46,186
+44,872
| +3,415% | +$1.92M |
|
110
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$10.7B
| $1.97M | 0.01% |
13,303
+2,892
| +28% | +$429K |
|
111
HDFC Bank
HDB
$181B
| $1.97M | 0.01% |
15,126
+13,326
| +740% | +$1.73M |
|
112
Lear
LEA
$5.77B
| $1.93M | 0.01% |
+13,834
| New | +$1.93M |
|
113
Lennar Class A
LEN
$34.7B
| $1.89M | 0.01% |
38,911
+36,640
| +1,613% | +$1.77M |
|
114
HEICO
HEI
$44.4B
| $1.87M | 0.01% |
13,971
+13,881
| +15,423% | +$1.86M |
|
115
Dell
DELL
$83.9B
| $1.86M | 0.01% |
+36,694
| New | +$1.86M |
|
116
Herbalife
HLF
$1.02B
| $1.86M | 0.01% |
43,577
+22,948
| +111% | +$981K |
|
117
Intuit
INTU
$187B
| $1.84M | 0.01% |
7,036
-6,282
| -47% | -$1.64M |
|
118
Cencora
COR
$57.2B
| $1.84M | 0.01% |
21,548
-20,941
| -49% | -$1.79M |
|
119
iShares Russell 2000 Value ETF
IWN
$11.7B
| $1.81M | ﹤0.01% |
15,028
+14,683
| +4,256% | +$1.77M |
|
120
Newmont
NEM
$82.8B
| $1.8M | ﹤0.01% |
+46,914
| New | +$1.8M |
|
|
ABMD
121
DELISTED
Abiomed Inc
ABMD
| $1.78M | ﹤0.01% |
+6,844
| New | +$1.78M |
|
122
Radware
RDWR
$1.06B
| $1.77M | ﹤0.01% |
71,720
+43,945
| +158% | +$1.09M |
|
123
Schlumberger
SLB
$52.2B
| $1.77M | ﹤0.01% |
+44,555
| New | +$1.77M |
|
124
ING
ING
$71B
| $1.74M | ﹤0.01% |
150,776
+3,026
| +2% | +$35K |
|
125
Kellanova
K
$27.5B
| $1.74M | ﹤0.01% |
+32,451
| New | +$1.74M |
|