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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1151
Amkor Technology
AMKR
$6.27B
| $36K | ﹤0.01% |
+5,600
| New | +$36K |
|
1152
Criteo
CRTO
$1.15B
| $36K | ﹤0.01% |
1,588
+1,000
| +170% | +$22.7K |
|
1153
Editas Medicine
EDIT
$244M
| $36K | ﹤0.01% |
1,610
-12,497
| -89% | -$279K |
|
1154
VanEck JP Morgan EM Local Currency Bond ETF
EMLC
$3.72B
| $36K | ﹤0.01% |
1,120
-4,688
| -81% | -$151K |
|
1155
Methode Electronics
MEI
$292M
| $36K | ﹤0.01% |
1,585
+1,257
| +383% | +$28.6K |
|
1156
ProShares Ultra Technology
ROM
$816M
| $36K | ﹤0.01% |
+3,656
| New | +$36K |
|
1157
CVR Partners
UAN
$903M
| $36K | ﹤0.01% |
+1,084
| New | +$36K |
|
1158
ProShares Ultra Russell2000
UWM
$393M
| $36K | ﹤0.01% |
1,390
+1,190
| +595% | +$30.8K |
|
1159
Accuray
ARAY
$179M
| $35K | ﹤0.01% |
10,554
-2,685
| -20% | -$8.9K |
|
1160
Cullen/Frost Bankers
CFR
$8.11B
| $35K | ﹤0.01% |
+409
| New | +$35K |
|
1161
Magnachip Semiconductor
MX
$110M
| $35K | ﹤0.01% |
5,706
+852
| +18% | +$5.23K |
|
1162
Enpro
NPO
$4.61B
| $35K | ﹤0.01% |
+595
| New | +$35K |
|
1163
Regency Centers
REG
$13.1B
| $35K | ﹤0.01% |
598
-3,878
| -87% | -$227K |
|
1164
Steel Dynamics
STLD
$19.5B
| $35K | ﹤0.01% |
+1,188
| New | +$35K |
|
|
TRVG
1165
trivago
TRVG
$230M
| $35K | ﹤0.01% |
+1,262
| New | +$35K |
|
1166
WIX.com
WIX
$9.44B
| $35K | ﹤0.01% |
+398
| New | +$35K |
|
|
CMBT
1167
CMB.TECH NV
CMBT
$2.72B
| $35K | ﹤0.01% |
+5,171
| New | +$35K |
|
|
MAXR
1168
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $35K | ﹤0.01% |
2,951
+1,447
| +96% | +$17.2K |
|
|
CBL
1169
DELISTED
CBL& Associates Properties, Inc.
CBL
| $35K | ﹤0.01% |
+18,520
| New | +$35K |
|
|
CTWS
1170
DELISTED
Connecticut Water Service Inc
CTWS
| $35K | ﹤0.01% |
534
+54
| +11% | +$3.54K |
|
1171
Anika Therapeutics
ANIK
$121M
| $34K | ﹤0.01% |
+1,029
| New | +$34K |
|
1172
iShares S&P GSCI Commodity-Indexed Trust
GSG
$992M
| $34K | ﹤0.01% |
2,479
-2,143
| -46% | -$29.4K |
|
1173
Knowles
KN
$1.85B
| $34K | ﹤0.01% |
+2,560
| New | +$34K |
|
1174
Invesco India ETF
PIN
$213M
| $34K | ﹤0.01% |
1,411
+716
| +103% | +$17.3K |
|
1175
TransUnion
TRU
$17.5B
| $34K | ﹤0.01% |
+606
| New | +$34K |
|