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 | |
|---|---|---|---|---|---|---|
|
TBIO
926
DELISTED
Translate Bio, Inc. Common Stock
TBIO
| $254K | ﹤0.01% |
13,834
+395
| +3% | +$7.25K |
|
927
Middleby
MIDD
$7.03B
| $253K | ﹤0.01% |
+1,963
| New | +$253K |
|
928
Philips
PHG
$27.2B
| $252K | ﹤0.01% |
+5,549
| New | +$252K |
|
929
AutoNation
AN
$8.42B
| $251K | ﹤0.01% |
+3,607
| New | +$251K |
|
|
CALA
930
DELISTED
Calithera Biosciences, Inc
CALA
| $251K | ﹤0.01% |
+2,562
| New | +$251K |
|
931
Palomar
PLMR
$3.18B
| $250K | ﹤0.01% |
2,821
+2,406
| +580% | +$213K |
|
932
Openlane
KAR
$3.12B
| $249K | ﹤0.01% |
13,430
-7,466
| -36% | -$138K |
|
933
Liquidity Services
LQDT
$845M
| $249K | ﹤0.01% |
15,710
+5,111
| +48% | +$81K |
|
|
MGIC
934
Magic Software Enterprises
MGIC
$1.01B
| $249K | ﹤0.01% |
15,918
+5,190
| +48% | +$81.2K |
|
935
Power Integrations
POWI
$2.5B
| $249K | ﹤0.01% |
3,051
+2,671
| +703% | +$218K |
|
|
CD
936
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $249K | ﹤0.01% |
+10,426
| New | +$249K |
|
937
Corning
GLW
$64.6B
| $248K | ﹤0.01% |
6,900
-4,395
| -39% | -$158K |
|
938
Mine Safety
MSA
$6.63B
| $248K | ﹤0.01% |
1,662
+1,380
| +489% | +$206K |
|
939
Tower Semiconductor
TSEM
$7.57B
| $248K | ﹤0.01% |
9,623
-21,611
| -69% | -$557K |
|
940
Teekay Tankers
TNK
$1.79B
| $247K | ﹤0.01% |
22,474
+6,220
| +38% | +$68.4K |
|
941
BRF SA
BRFS
$5.99B
| $246K | ﹤0.01% |
58,579
+18,722
| +47% | +$78.6K |
|
|
CONE
942
DELISTED
CyrusOne Inc Common Stock
CONE
| $246K | ﹤0.01% |
+3,371
| New | +$246K |
|
943
Host Hotels & Resorts
HST
$12.1B
| $243K | ﹤0.01% |
16,636
-53,927
| -76% | -$788K |
|
|
ZEPP
944
Zepp Health
ZEPP
$744M
| $243K | ﹤0.01% |
5,133
+3,643
| +244% | +$172K |
|
945
Vistra
VST
$69.1B
| $242K | ﹤0.01% |
12,324
+6,936
| +129% | +$136K |
|
946
Merit Medical Systems
MMSI
$5.34B
| $240K | ﹤0.01% |
4,327
+188
| +5% | +$10.4K |
|
947
Opko Health
OPK
$1.12B
| $240K | ﹤0.01% |
60,899
-10,226
| -14% | -$40.3K |
|
948
AAR Corp
AIR
$2.66B
| $236K | ﹤0.01% |
+6,524
| New | +$236K |
|
949
Dynavax Technologies
DVAX
$1.14B
| $236K | ﹤0.01% |
53,195
+21,676
| +69% | +$96.2K |
|
950
WisdomTree India Earnings Fund ETF
EPI
$2.94B
| $236K | ﹤0.01% |
+8,110
| New | +$236K |
|