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 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
151
iShares Silver Trust
SLV
$20.1B
| $2.05M | 0.01% |
135,595
+100,235
| +283% | +$1.52M |
|
152
CVS Health
CVS
$93.7B
| $2.03M | 0.01% |
31,554
-48,348
| -61% | -$3.11M |
|
153
Domino's
DPZ
$15.6B
| $2.02M | 0.01% |
+7,145
| New | +$2.02M |
|
154
Zoetis
ZTS
$67.9B
| $2.01M | 0.01% |
+23,576
| New | +$2.01M |
|
155
Aflac
AFL
$56.9B
| $2.01M | 0.01% |
46,642
+37,049
| +386% | +$1.59M |
|
|
SPLK
156
DELISTED
Splunk Inc
SPLK
| $2.01M | 0.01% |
+20,249
| New | +$2.01M |
|
157
Bread Financial
BFH
$3.07B
| $2M | 0.01% |
10,760
+10,380
| +2,732% | +$1.93M |
|
158
Costco
COST
$426B
| $1.98M | 0.01% |
+9,461
| New | +$1.98M |
|
159
Copa Holdings
CPA
$4.84B
| $1.97M | 0.01% |
20,780
+15,679
| +307% | +$1.48M |
|
160
DaVita
DVA
$9.84B
| $1.95M | 0.01% |
28,060
+8,802
| +46% | +$611K |
|
161
iShares Expanded Tech-Software Sector ETF
IGV
$9.78B
| $1.94M | 0.01% |
53,020
+4,055
| +8% | +$148K |
|
162
Vicor
VICR
$2.32B
| $1.9M | 0.01% |
43,628
+38,941
| +831% | +$1.69M |
|
163
Illumina
ILMN
$15.6B
| $1.88M | 0.01% |
6,934
-4,234
| -38% | -$1.15M |
|
164
MetLife
MET
$52.2B
| $1.88M | 0.01% |
43,192
-147,762
| -77% | -$6.44M |
|
|
SINA
165
DELISTED
Sina Corp
SINA
| $1.86M | 0.01% |
21,956
+7,369
| +51% | +$624K |
|
166
Zions Bancorporation
ZION
$8.35B
| $1.85M | 0.01% |
+35,112
| New | +$1.85M |
|
167
VanEck Junior Gold Miners ETF
GDXJ
$7.04B
| $1.83M | 0.01% |
55,979
+63
| +0.1% | +$2.06K |
|
168
IAC Inc
IAC
$2.96B
| $1.81M | 0.01% |
+66,597
| New | +$1.81M |
|
169
Carter's
CRI
$1.04B
| $1.8M | 0.01% |
16,640
+6,693
| +67% | +$725K |
|
170
eBay
EBAY
$42B
| $1.8M | 0.01% |
49,601
-11,519
| -19% | -$418K |
|
171
Charter Communications
CHTR
$35.4B
| $1.79M | 0.01% |
+6,092
| New | +$1.79M |
|
172
iShares MSCI EAFE ETF
EFA
$66.1B
| $1.79M | 0.01% |
+26,656
| New | +$1.79M |
|
173
Southwest Airlines
LUV
$16.3B
| $1.78M | 0.01% |
+35,076
| New | +$1.78M |
|
174
Fomento Económico Mexicano
FMX
$29.5B
| $1.78M | 0.01% |
20,220
-5,116
| -20% | -$449K |
|
175
Direxion Daily Energy Bull 2X Shares
ERX
$217M
| $1.76M | 0.01% |
+4,623
| New | +$1.76M |
|