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 | |
|---|---|---|---|---|---|---|
176
ProShares UltraPro Dow 30
UDOW
$715M
| $1.35M | ﹤0.01% |
26,204
+8,058
| +44% | +$414K |
|
177
Vodafone
VOD
$28.5B
| $1.34M | ﹤0.01% |
+81,816
| New | +$1.34M |
|
178
Invesco S&P 500 Low Volatility ETF
SPLV
$7.99B
| $1.34M | ﹤0.01% |
24,280
+8,273
| +52% | +$455K |
|
179
Southern Company
SO
$101B
| $1.3M | ﹤0.01% |
23,594
-57,578
| -71% | -$3.18M |
|
180
Teva Pharmaceuticals
TEVA
$21.7B
| $1.3M | ﹤0.01% |
+140,792
| New | +$1.3M |
|
|
TIVO
181
DELISTED
Tivo Inc
TIVO
| $1.3M | ﹤0.01% |
176,189
+133,732
| +315% | +$985K |
|
182
AGNC Investment
AGNC
$10.8B
| $1.29M | ﹤0.01% |
76,837
+9,831
| +15% | +$165K |
|
183
PTC
PTC
$25.6B
| $1.29M | ﹤0.01% |
+14,377
| New | +$1.29M |
|
|
CLDR
184
DELISTED
Cloudera, Inc.
CLDR
| $1.28M | ﹤0.01% |
243,235
+61,830
| +34% | +$325K |
|
|
NLSN
185
DELISTED
Nielsen Holdings plc
NLSN
| $1.28M | ﹤0.01% |
56,608
+50,038
| +762% | +$1.13M |
|
186
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$133M
| $1.27M | ﹤0.01% |
1,100
+558
| +103% | +$642K |
|
|
SMAR
187
DELISTED
Smartsheet Inc.
SMAR
| $1.26M | ﹤0.01% |
26,063
-21,520
| -45% | -$1.04M |
|
|
188
SPDR S&P 500 ETF Trust
SPY
$660B
| $1.26M | ﹤0.01% |
4,300
-141,160
| -97% | -$41.3M |
|
189
Stitch Fix
SFIX
$737M
| $1.26M | ﹤0.01% |
39,317
+32,893
| +512% | +$1.05M |
|
190
CrowdStrike
CRWD
$105B
| $1.25M | ﹤0.01% |
+18,364
| New | +$1.25M |
|
191
Chevron
CVX
$310B
| $1.25M | ﹤0.01% |
+10,044
| New | +$1.25M |
|
192
United States Oil Fund
USO
$939M
| $1.25M | ﹤0.01% |
+12,965
| New | +$1.25M |
|
193
Arrowhead Research
ARWR
$4.02B
| $1.24M | ﹤0.01% |
46,978
+38,102
| +429% | +$1.01M |
|
194
SPDR S&P China ETF
GXC
$483M
| $1.24M | ﹤0.01% |
+13,010
| New | +$1.24M |
|
195
Pampa Energía
PAM
$3.7B
| $1.23M | ﹤0.01% |
+35,509
| New | +$1.23M |
|
196
iShares US Transportation ETF
IYT
$605M
| $1.23M | ﹤0.01% |
+26,100
| New | +$1.23M |
|
197
Restaurant Brands International
QSR
$20.7B
| $1.22M | ﹤0.01% |
17,507
-36,000
| -67% | -$2.5M |
|
198
iShares MSCI Chile ETF
ECH
$726M
| $1.2M | ﹤0.01% |
+29,413
| New | +$1.2M |
|
|
LSI
199
DELISTED
Life Storage, Inc.
LSI
| $1.2M | ﹤0.01% |
18,923
-3,315
| -15% | -$210K |
|
200
B&G Foods
BGS
$374M
| $1.19M | ﹤0.01% |
57,285
+42,324
| +283% | +$880K |
|