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 | +$73.1M | |
| 2 | +$51.8M | |
| 3 | +$46M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| 1 | +$262M | |
| 2 | +$194M | |
| 3 | +$149M | |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| 1 | Technology | 29.67% |
| 2 | Consumer Discretionary | 10.7% |
| 3 | Healthcare | 10.12% |
| 4 | Industrials | 8.86% |
| 5 | Communication Services | 7.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
576
FIVE9
FIVN
$1.87B
| $714K | 0.02% |
35,629
+5,820
|
|
||
577
Dianthus Therapeutics
DNTH
$4.6B
| $714K | 0.02% |
17,333
+11,020
|
|
||
|
OPRA
578
Opera Ltd
OPRA
$1.67B
| $710K | 0.02% |
+50,151
|
|
||
579
Mobileye
MBLY
$8.88B
| $706K | 0.02% |
67,612
-134,427
|
|
||
580
Global E Online
GLBE
$5.52B
| $703K | 0.02% |
17,889
-46,596
|
|
||
581
Rubrik
RBRK
$15.8B
| $700K | 0.02% |
9,152
-36,276
|
|
||
582
Omnicom Group
OMC
$21.6B
| $700K | 0.02% |
+8,667
|
|
||
583
DraftKings
DKNG
$12.6B
| $696K | 0.02% |
20,210
-102,897
|
|
||
584
BBVA Argentina
BBAR
$3.63B
| $692K | 0.02% |
38,322
+24,275
|
|
||
585
Manchester United
MANU
$3.9B
| $685K | 0.02% |
43,015
+16,170
|
|
||
586
Consolidated Edison
ED
$38.4B
| $684K | 0.02% |
6,884
+2,735
|
|
||
587
Herc Holdings
HRI
$4.69B
| $683K | 0.02% |
+4,605
|
|
||
|
APLS
588
DELISTED
Apellis Pharmaceuticals
APLS
| $683K | 0.02% |
27,187
-26,714
|
|
||
589
Critical Metals Corp
CRML
$1.61B
| $680K | 0.02% |
97,916
-20,438
|
|
||
590
Adobe
ADBE
$104B
| $677K | 0.02% |
1,935
-30,312
|
|
||
591
Sweetgreen
SG
$876M
| $677K | 0.02% |
100,163
+9,386
|
|
||
592
Target Hospitality
TH
$1.67B
| $673K | 0.02% |
84,008
+39,691
|
|
||
593
Trip.com Group
TCOM
$30.3B
| $666K | 0.02% |
9,268
-11,976
|
|
||
594
BlueLinx
BXC
$402M
| $665K | 0.02% |
+10,833
|
|
||
595
Enovix
ENVX
$1.82B
| $662K | 0.02% |
90,575
-157,453
|
|
||
596
ProShares UltraShort Silver
ZSL
$110M
| $656K | 0.02% |
+12,289
|
|
||
597
Hercules Capital
HTGC
$2.91B
| $655K | 0.02% |
34,820
+16,544
|
|
||
598
MannKind Corp
MNKD
$1.09B
| $653K | 0.02% |
115,191
+2,054
|
|
||
599
Papa John's
PZZA
$1.06B
| $650K | 0.02% |
+16,889
|
|
||
600
Sanmina
SANM
$15B
| $650K | 0.02% |
+4,328
|
|