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 |
Amazon
AMZN
|
+$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$57.4M |
| 4 |
Citigroup
C
|
+$23.4M |
| 5 |
Goldman Sachs
GS
|
+$23M |
Top Sells
| 1 |
Apple
AAPL
|
+$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$42.2M |
| 4 |
Micron Technology
MU
|
+$26.1M |
| 5 |
Adobe
ADBE
|
+$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
726
Madrigal Pharmaceuticals
MDGL
$9.67B
| $232K | ﹤0.01% |
+1,085
| New | +$232K |
|
727
Lattice Semiconductor
LSCC
$9.22B
| $230K | ﹤0.01% |
+28,796
| New | +$230K |
|
728
SiriusXM
SIRI
$8.03B
| $230K | ﹤0.01% |
3,651
-1,655
| -31% | -$104K |
|
|
AAWW
729
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $230K | ﹤0.01% |
+3,623
| New | +$230K |
|
730
Kroger
KR
$44.6B
| $229K | ﹤0.01% |
+7,876
| New | +$229K |
|
731
Cimpress
CMPR
$1.48B
| $228K | ﹤0.01% |
1,671
-3,235
| -66% | -$441K |
|
|
USG
732
DELISTED
Usg
USG
| $228K | ﹤0.01% |
+5,284
| New | +$228K |
|
733
Ares Capital
ARCC
$15.9B
| $225K | ﹤0.01% |
+13,102
| New | +$225K |
|
734
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.81B
| $225K | ﹤0.01% |
+7,144
| New | +$225K |
|
735
uniQure
QURE
$973M
| $224K | ﹤0.01% |
6,179
-6,932
| -53% | -$251K |
|
|
CCXI
736
DELISTED
ChemoCentryx, Inc.
CCXI
| $224K | ﹤0.01% |
17,754
+9,030
| +104% | +$114K |
|
737
ProShares Short VIX Short-Term Futures ETF
SVXY
$253M
| $223K | ﹤0.01% |
7,570
-26,489
| -78% | -$780K |
|
738
Groupon
GRPN
$922M
| $222K | ﹤0.01% |
2,957
+2,349
| +386% | +$176K |
|
739
Oppenheimer Holdings
OPY
$783M
| $221K | ﹤0.01% |
7,023
+4,633
| +194% | +$146K |
|
740
WEX
WEX
$5.92B
| $221K | ﹤0.01% |
1,103
+861
| +356% | +$173K |
|
741
Cintas
CTAS
$82.3B
| $220K | ﹤0.01% |
4,468
-5,076
| -53% | -$250K |
|
742
Zscaler
ZS
$44.5B
| $219K | ﹤0.01% |
+5,371
| New | +$219K |
|
743
Public Storage
PSA
$51.2B
| $217K | ﹤0.01% |
+1,078
| New | +$217K |
|
744
RBC Bearings
RBC
$12B
| $217K | ﹤0.01% |
+1,447
| New | +$217K |
|
745
Bunge Global
BG
$16.4B
| $216K | ﹤0.01% |
3,155
-6,393
| -67% | -$438K |
|
|
ENBL
746
DELISTED
ENABLE MIDSTREAM PARTNERS, LP
ENBL
| $215K | ﹤0.01% |
12,804
+12,375
| +2,885% | +$208K |
|
|
MBT
747
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $215K | ﹤0.01% |
25,262
+24,497
| +3,202% | +$208K |
|
748
RadNet
RDNT
$5.56B
| $213K | ﹤0.01% |
14,168
+13,972
| +7,129% | +$210K |
|
|
SAVE
749
DELISTED
Spirit Airlines, Inc.
SAVE
| $213K | ﹤0.01% |
4,554
+722
| +19% | +$33.8K |
|
|
ZEN
750
DELISTED
ZENDESK INC
ZEN
| $213K | ﹤0.01% |
3,010
-1,077
| -26% | -$76.2K |
|