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 | |
|---|---|---|---|---|---|---|
1251
Mammoth Energy Services
TUSK
$115M
| $26K | ﹤0.01% |
+1,597
| New | +$26K |
|
1252
ProShares Ultra Real Estate
URE
$61.4M
| $26K | ﹤0.01% |
+353
| New | +$26K |
|
|
XHR
1253
Xenia Hotels & Resorts
XHR
$1.41B
| $26K | ﹤0.01% |
+1,230
| New | +$26K |
|
1254
Zevra Therapeutics
ZVRA
$446M
| $26K | ﹤0.01% |
1,009
+911
| +930% | +$23.5K |
|
|
PGNX
1255
DELISTED
Progenics Pharmaceuticals Inc
PGNX
| $26K | ﹤0.01% |
+5,618
| New | +$26K |
|
|
SORL
1256
DELISTED
SORL Auto Parts, Inc.
SORL
| $26K | ﹤0.01% |
9,191
+5,014
| +120% | +$14.2K |
|
1257
Alto Ingredients
ALTO
$89.8M
| $25K | ﹤0.01% |
26,110
+25,818
| +8,842% | +$24.7K |
|
1258
Clean Energy Fuels
CLNE
$555M
| $25K | ﹤0.01% |
8,159
+7,017
| +614% | +$21.5K |
|
1259
Deluxe
DLX
$889M
| $25K | ﹤0.01% |
+579
| New | +$25K |
|
1260
Pegasystems
PEGA
$9.94B
| $25K | ﹤0.01% |
778
+472
| +154% | +$15.2K |
|
|
GNMK
1261
DELISTED
GenMark Diagnostics, Inc
GNMK
| $25K | ﹤0.01% |
+3,610
| New | +$25K |
|
|
PFNX
1262
DELISTED
Pfenex Inc.
PFNX
| $25K | ﹤0.01% |
+4,144
| New | +$25K |
|
1263
VanEck Gaming ETF
BJK
$27.8M
| $24K | ﹤0.01% |
658
-490
| -43% | -$17.9K |
|
1264
Coca-Cola Europacific Partners
CCEP
$40.9B
| $24K | ﹤0.01% |
+471
| New | +$24K |
|
1265
Choice Hotels
CHH
$5.33B
| $24K | ﹤0.01% |
316
-30
| -9% | -$2.28K |
|
1266
NeoGenomics
NEO
$1.08B
| $24K | ﹤0.01% |
+1,211
| New | +$24K |
|
1267
RBC Bearings
RBC
$12.2B
| $24K | ﹤0.01% |
+191
| New | +$24K |
|
|
XNET
1268
Xunlei
XNET
$470M
| $24K | ﹤0.01% |
6,651
-2,362
| -26% | -$8.52K |
|
1269
Advanced Energy
AEIS
$6.02B
| $23K | ﹤0.01% |
+471
| New | +$23K |
|
1270
Atara Biotherapeutics
ATRA
$85.4M
| $23K | ﹤0.01% |
23
-90
| -80% | -$90K |
|
1271
Invesco DB Commodity Index Tracking Fund
DBC
$1.27B
| $23K | ﹤0.01% |
1,507
| – | – |
|
|
EXK
1272
Endeavour Silver
EXK
$1.78B
| $23K | ﹤0.01% |
+9,240
| New | +$23K |
|
1273
IDEX
IEX
$12.4B
| $23K | ﹤0.01% |
+158
| New | +$23K |
|
1274
Innoviva
INVA
$1.22B
| $23K | ﹤0.01% |
+1,674
| New | +$23K |
|
1275
Ring Energy
REI
$211M
| $23K | ﹤0.01% |
4,073
+2,339
| +135% | +$13.2K |
|