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
|
+$92M |
| 2 |
Walt Disney
DIS
|
+$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$12.8M |
| 4 |
Baidu
BIDU
|
+$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
+$61.4M |
| 2 |
Amazon
AMZN
|
+$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$35.5M |
| 4 |
Apple
AAPL
|
+$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
+$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.01% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
AKCA
1176
DELISTED
Akcea Therapeutics, Inc. Common Stock
AKCA
| $37K | ﹤0.01% |
+1,311
| New | +$37K |
|
1177
e.l.f. Beauty
ELF
$7.82B
| $36K | ﹤0.01% |
3,458
+909
| +36% | +$9.46K |
|
1178
Mine Safety
MSA
$6.74B
| $36K | ﹤0.01% |
351
-544
| -61% | -$55.8K |
|
1179
Companhia Siderúrgica Nacional
SID
$1.99B
| $36K | ﹤0.01% |
8,944
-20,920
| -70% | -$84.2K |
|
1180
ProShares Ultra Gold
UGL
$740M
| $36K | ﹤0.01% |
3,924
+2,772
| +241% | +$25.4K |
|
|
VRN
1181
DELISTED
Veren
VRN
| $36K | ﹤0.01% |
11,400
-30,842
| -73% | -$97.4K |
|
|
PRCP
1182
DELISTED
Perceptron Inc
PRCP
| $36K | ﹤0.01% |
4,800
+4,726
| +6,386% | +$35.4K |
|
1183
ProShares Ultra Bloomberg Natural Gas
BOIL
$123M
| $35K | ﹤0.01% |
2
| – | – |
|
1184
Dorchester Minerals
DMLP
$1.21B
| $35K | ﹤0.01% |
+1,943
| New | +$35K |
|
1185
EXL Service
EXLS
$7.07B
| $35K | ﹤0.01% |
2,985
+1,135
| +61% | +$13.3K |
|
|
FENG
1186
Phoenix New Media
FENG
$31.5M
| $35K | ﹤0.01% |
1,391
+1,313
| +1,683% | +$33K |
|
1187
Flex
FLEX
$21.8B
| $35K | ﹤0.01% |
4,729
+2,431
| +106% | +$18K |
|
1188
GeoPark
GPRK
$331M
| $35K | ﹤0.01% |
+2,066
| New | +$35K |
|
1189
Marcus Corp
MCS
$501M
| $35K | ﹤0.01% |
+888
| New | +$35K |
|
1190
Red Robin
RRGB
$120M
| $35K | ﹤0.01% |
1,232
-416
| -25% | -$11.8K |
|
|
BECN
1191
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $35K | ﹤0.01% |
1,090
-1,937
| -64% | -$62.2K |
|
|
RESN
1192
DELISTED
Resonant Inc.
RESN
| $35K | ﹤0.01% |
11,819
+9,448
| +398% | +$28K |
|
1193
China Yuchai International
CYD
$1.44B
| $34K | ﹤0.01% |
2,146
+1,027
| +92% | +$16.3K |
|
1194
iShares S&P GSCI Commodity-Indexed Trust
GSG
$995M
| $34K | ﹤0.01% |
2,192
-287
| -12% | -$4.45K |
|
1195
Natera
NTRA
$23.7B
| $34K | ﹤0.01% |
1,681
+952
| +131% | +$19.3K |
|
1196
NatWest
NWG
$58.1B
| $34K | ﹤0.01% |
4,982
-6,289
| -56% | -$42.9K |
|
|
INVX
1197
Innovex International, Inc.
INVX
$1.15B
| $34K | ﹤0.01% |
+746
| New | +$34K |
|
|
TCO
1198
DELISTED
Taubman Centers Inc.
TCO
| $34K | ﹤0.01% |
645
-1,599
| -71% | -$84.3K |
|
|
CHU
1199
DELISTED
China Unicom (HONG KONG) Limited
CHU
| $34K | ﹤0.01% |
2,699
+2,617
| +3,191% | +$33K |
|
1200
Donnelley Financial Solutions
DFIN
$1.54B
| $33K | ﹤0.01% |
2,228
-10,243
| -82% | -$152K |
|