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 |
Financial Select Sector SPDR Fund
XLF
|
+$42.3M |
| 2 |
Shopify
SHOP
|
+$37.4M |
| 3 |
Verizon
VZ
|
+$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Merck
MRK
|
+$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
+$38.3M |
| 2 |
Carnival Corp
CCL
|
+$37.6M |
| 3 |
GE Aerospace
GE
|
+$33M |
| 4 |
Advanced Micro Devices
AMD
|
+$30.6M |
| 5 |
Micron Technology
MU
|
+$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1101
Fortuna Silver Mines
FSM
$2.59B
| $242K | ﹤0.01% |
62,144
-83,882
| -57% | -$327K |
|
1102
Gartner
IT
$18.3B
| $241K | ﹤0.01% |
721
-5,152
| -88% | -$1.72M |
|
|
WLL
1103
DELISTED
Whiting Petroleum Corporation
WLL
| $241K | ﹤0.01% |
3,736
+2,308
| +162% | +$149K |
|
1104
Aurora
AUR
$10.3B
| $240K | ﹤0.01% |
+21,402
| New | +$240K |
|
1105
Origin Materials
ORGN
$81.4M
| $240K | ﹤0.01% |
37,220
+6,938
| +23% | +$44.7K |
|
1106
Constellation Brands
STZ
$25.2B
| $240K | ﹤0.01% |
+959
| New | +$240K |
|
|
CLR
1107
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $239K | ﹤0.01% |
+5,356
| New | +$239K |
|
1108
Puma Biotechnology
PBYI
$229M
| $238K | ﹤0.01% |
78,512
+75,870
| +2,872% | +$230K |
|
1109
Vanguard Total International Stock ETF
VXUS
$105B
| $238K | ﹤0.01% |
3,759
+2,411
| +179% | +$153K |
|
|
TRVG
1110
trivago
TRVG
$230M
| $237K | ﹤0.01% |
21,792
-7,180
| -25% | -$78.1K |
|
1111
Wheels Up
UP
$1.51B
| $236K | ﹤0.01% |
+5,092
| New | +$236K |
|
1112
Arcturus Therapeutics
ARCT
$489M
| $235K | ﹤0.01% |
6,371
+5,569
| +694% | +$205K |
|
1113
TAL Education Group
TAL
$6.54B
| $235K | ﹤0.01% |
59,936
-296,646
| -83% | -$1.16M |
|
|
VLTA
1114
DELISTED
Volta Inc.
VLTA
| $235K | ﹤0.01% |
+32,105
| New | +$235K |
|
1115
Olo Inc
OLO
$1.74B
| $234K | ﹤0.01% |
11,283
-131,947
| -92% | -$2.74M |
|
1116
Rigel Pharmaceuticals
RIGL
$678M
| $234K | ﹤0.01% |
8,838
+2,933
| +50% | +$77.7K |
|
1117
Safe & Green Holdings
SGBX
$3.94M
| $234K | ﹤0.01% |
+13,321
| New | +$234K |
|
1118
Civista Bancshares
CIVB
$407M
| $233K | ﹤0.01% |
+9,562
| New | +$233K |
|
1119
Kodak
KODK
$464M
| $233K | ﹤0.01% |
49,920
+47,521
| +1,981% | +$222K |
|
1120
Natural Resource Partners
NRP
$1.35B
| $233K | ﹤0.01% |
+6,985
| New | +$233K |
|
|
CNR
1121
Core Natural Resources, Inc.
CNR
$3.74B
| $233K | ﹤0.01% |
+10,260
| New | +$233K |
|
|
SUNL
1122
DELISTED
Sunlight Financial Holdings, Inc.
SUNL
| $233K | ﹤0.01% |
+2,441
| New | +$233K |
|
1123
Genco Shipping & Trading
GNK
$763M
| $232K | ﹤0.01% |
14,534
+8,447
| +139% | +$135K |
|
1124
Ingles Markets
IMKTA
$1.29B
| $232K | ﹤0.01% |
+2,693
| New | +$232K |
|
1125
Beyond Air
XAIR
$11.8M
| $232K | ﹤0.01% |
+1,231
| New | +$232K |
|