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 |
Invesco QQQ Trust
QQQ
|
+$41.7M |
| 2 |
Mastercard
MA
|
+$33.6M |
| 3 |
Alibaba
BABA
|
+$33.4M |
| 4 |
Apple
AAPL
|
+$27.9M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$26M |
Top Sells
| 1 |
JPMorgan Chase
JPM
|
+$60M |
| 2 |
TSMC
TSM
|
+$49.5M |
| 3 |
iShares Silver Trust
SLV
|
+$26M |
| 4 |
Amazon
AMZN
|
+$25.2M |
| 5 |
Boeing
BA
|
+$22.1M |
Sector Composition
| 1 | Consumer Discretionary | 23.12% |
| 2 | Technology | 13.05% |
| 3 | Healthcare | 11.53% |
| 4 | Industrials | 7.38% |
| 5 | Communication Services | 6.71% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1226
Liberty Broadband Class C
LBRDK
$8.69B
| $124K | ﹤0.01% |
+787
| New | +$124K |
|
|
RESN
1227
DELISTED
Resonant Inc.
RESN
| $124K | ﹤0.01% |
47,139
+31,899
| +209% | +$83.9K |
|
1228
Gaming and Leisure Properties
GLPI
$13.6B
| $123K | ﹤0.01% |
+2,924
| New | +$123K |
|
1229
Technology Select Sector SPDR Fund
XLK
$86.5B
| $123K | ﹤0.01% |
949
-43,719
| -98% | -$5.67M |
|
|
EMWP
1230
DELISTED
Eros Media World PLC
EMWP
| $123K | ﹤0.01% |
3,401
-124
| -4% | -$4.49K |
|
1231
Protolabs
PRLB
$1.18B
| $122K | ﹤0.01% |
799
-3,307
| -81% | -$505K |
|
1232
Sibanye-Stillwater
SBSW
$6.16B
| $122K | ﹤0.01% |
7,737
-95,577
| -93% | -$1.51M |
|
|
ZIXI
1233
DELISTED
Zix Corporation
ZIXI
| $122K | ﹤0.01% |
14,203
-11,941
| -46% | -$103K |
|
|
AAWW
1234
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $122K | ﹤0.01% |
2,254
-2,041
| -48% | -$110K |
|
1235
Catalyst Pharmaceutical
CPRX
$2.45B
| $121K | ﹤0.01% |
+36,380
| New | +$121K |
|
1236
GoHealth
GOCO
$79.3M
| $121K | ﹤0.01% |
593
+254
| +75% | +$51.8K |
|
1237
LG Display
LPL
$4.46B
| $121K | ﹤0.01% |
+14,352
| New | +$121K |
|
1238
Schwab US TIPS ETF
SCHP
$14.1B
| $121K | ﹤0.01% |
3,916
+862
| +28% | +$26.6K |
|
1239
Invesco S&P 500 Equal Weight Health Care ETF
RSPH
$702M
| $120K | ﹤0.01% |
4,600
-980
| -18% | -$25.6K |
|
1240
Innovator IBD 50 ETF
FFTY
$80.6M
| $119K | ﹤0.01% |
2,900
-746
| -20% | -$30.6K |
|
1241
Ericsson
ERIC
$26.4B
| $118K | ﹤0.01% |
9,882
-63,725
| -87% | -$761K |
|
1242
Navient
NAVI
$1.28B
| $118K | ﹤0.01% |
12,071
-9,304
| -44% | -$91K |
|
1243
ROBO Global Robotics & Automation Index ETF
ROBO
$1.13B
| $118K | ﹤0.01% |
+1,950
| New | +$118K |
|
1244
Sundial Growers
SNDL
$618M
| $117K | ﹤0.01% |
+24,835
| New | +$117K |
|
1245
Empire State Realty Trust
ESRT
$1.34B
| $116K | ﹤0.01% |
12,504
-4,764
| -28% | -$44.2K |
|
1246
Federated Hermes
FHI
$4.16B
| $116K | ﹤0.01% |
+4,048
| New | +$116K |
|
1247
Kaiser Aluminum
KALU
$1.24B
| $116K | ﹤0.01% |
+1,178
| New | +$116K |
|
1248
CRH
CRH
$76.1B
| $115K | ﹤0.01% |
2,722
-4,488
| -62% | -$190K |
|
1249
Knight Transportation
KNX
$6.77B
| $115K | ﹤0.01% |
2,757
-1,410
| -34% | -$58.8K |
|
1250
Shutterstock
SSTK
$743M
| $115K | ﹤0.01% |
+1,612
| New | +$115K |
|