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 | |
|---|---|---|---|---|---|---|
1226
Starwood Property Trust
STWD
$7.52B
| $26K | ﹤0.01% |
+1,145
| New | +$26K |
|
1227
Invesco Solar ETF
TAN
$726M
| $26K | ﹤0.01% |
930
+296
| +47% | +$8.28K |
|
1228
Urban Edge Properties
UE
$2.66B
| $26K | ﹤0.01% |
1,507
+875
| +138% | +$15.1K |
|
1229
Energous
WATT
$11.3M
| $26K | ﹤0.01% |
10
+2
| +25% | +$5.2K |
|
1230
Wendy's
WEN
$1.84B
| $26K | ﹤0.01% |
+1,354
| New | +$26K |
|
1231
TruBridge
TBRG
$302M
| $26K | ﹤0.01% |
954
-1,121
| -54% | -$30.6K |
|
|
FLG
1232
Flagstar Financial, Inc.
FLG
$5.27B
| $26K | ﹤0.01% |
+884
| New | +$26K |
|
|
EPZM
1233
DELISTED
Epizyme, Inc
EPZM
| $26K | ﹤0.01% |
+2,097
| New | +$26K |
|
|
RESN
1234
DELISTED
Resonant Inc.
RESN
| $26K | ﹤0.01% |
11,271
-548
| -5% | -$1.26K |
|
|
LORL
1235
DELISTED
Loral Space and Communications, Inc.
LORL
| $26K | ﹤0.01% |
772
+285
| +59% | +$9.6K |
|
|
AKCA
1236
DELISTED
Akcea Therapeutics, Inc. Common Stock
AKCA
| $26K | ﹤0.01% |
1,117
-194
| -15% | -$4.52K |
|
1237
Gentex
GNTX
$6.25B
| $25K | ﹤0.01% |
1,044
+186
| +22% | +$4.45K |
|
1238
FerroAtlántica
GSM
$773M
| $25K | ﹤0.01% |
14,948
-28,559
| -66% | -$47.8K |
|
1239
NETGEAR
NTGR
$831M
| $25K | ﹤0.01% |
1,003
-1,849
| -65% | -$46.1K |
|
1240
US Physical Therapy
USPH
$1.22B
| $25K | ﹤0.01% |
208
+54
| +35% | +$6.49K |
|
|
ENLC
1241
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $25K | ﹤0.01% |
+2,543
| New | +$25K |
|
|
DF
1242
DELISTED
Dean Foods Company
DF
| $25K | ﹤0.01% |
+27,314
| New | +$25K |
|
1243
CrossAmerica Partners
CAPL
$774M
| $24K | ﹤0.01% |
1,517
+404
| +36% | +$6.39K |
|
1244
Cannae Holdings
CNNE
$1.11B
| $24K | ﹤0.01% |
+855
| New | +$24K |
|
1245
e.l.f. Beauty
ELF
$7.67B
| $24K | ﹤0.01% |
1,736
-1,722
| -50% | -$23.8K |
|
1246
iShares MSCI Pacific ex Japan ETF
EPP
$1.85B
| $24K | ﹤0.01% |
+512
| New | +$24K |
|
1247
iRhythm Technologies
IRTC
$5.78B
| $24K | ﹤0.01% |
307
-13,761
| -98% | -$1.08M |
|
1248
Companhia Siderúrgica Nacional
SID
$2.01B
| $24K | ﹤0.01% |
5,607
-3,337
| -37% | -$14.3K |
|
1249
ProShares Ultra S&P500
SSO
$7.39B
| $24K | ﹤0.01% |
788
-4,272
| -84% | -$130K |
|
1250
ProShares Ultra Russell2000
UWM
$386M
| $24K | ﹤0.01% |
698
-4,014
| -85% | -$138K |
|