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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
STKL
626
SunOpta
STKL
$735M
| $504K | ﹤0.01% |
93,348
+81,453
| +685% | +$440K |
|
627
iShares Global Clean Energy ETF
ICLN
$1.58B
| $501K | ﹤0.01% |
37,648
+15,516
| +70% | +$206K |
|
628
KBR
KBR
$6.42B
| $501K | ﹤0.01% |
+7,817
| New | +$501K |
|
629
Aptiv
APTV
$17.8B
| $500K | ﹤0.01% |
+7,103
| New | +$500K |
|
630
Global X Copper Miners ETF NEW
COPX
$2.17B
| $499K | ﹤0.01% |
+11,084
| New | +$499K |
|
631
nVent Electric
NVT
$15.3B
| $499K | ﹤0.01% |
6,516
-15,955
| -71% | -$1.22M |
|
632
Logitech
LOGI
$16B
| $498K | ﹤0.01% |
5,149
-839
| -14% | -$81.1K |
|
633
Rocket Lab Corporation Common Stock
RKLB
$22.3B
| $498K | ﹤0.01% |
103,848
+53,905
| +108% | +$259K |
|
634
Zai Lab
ZLAB
$3.16B
| $494K | ﹤0.01% |
28,530
-11,097
| -28% | -$192K |
|
635
Bumble
BMBL
$682M
| $493K | ﹤0.01% |
46,980
-12,351
| -21% | -$130K |
|
636
Manchester United
MANU
$2.81B
| $493K | ﹤0.01% |
30,584
-24,805
| -45% | -$400K |
|
637
Vipshop
VIPS
$8.85B
| $490K | ﹤0.01% |
+37,683
| New | +$490K |
|
638
Murphy Oil
MUR
$3.72B
| $489K | ﹤0.01% |
11,871
-25,371
| -68% | -$1.05M |
|
639
Opko Health
OPK
$1.12B
| $488K | ﹤0.01% |
390,507
+116,956
| +43% | +$146K |
|
640
Ferrari
RACE
$84.3B
| $488K | ﹤0.01% |
1,195
-7,240
| -86% | -$2.96M |
|
|
AZEK
641
DELISTED
The AZEK Co
AZEK
| $487K | ﹤0.01% |
+11,573
| New | +$487K |
|
642
iShares Mortgage Real Estate ETF
REM
$615M
| $487K | ﹤0.01% |
21,986
+15,688
| +249% | +$347K |
|
643
FIVE9
FIVN
$1.95B
| $486K | ﹤0.01% |
+11,037
| New | +$486K |
|
644
Sprout Social
SPT
$816M
| $484K | ﹤0.01% |
+13,575
| New | +$484K |
|
645
Vanguard High Dividend Yield ETF
VYM
$64.7B
| $482K | ﹤0.01% |
4,067
-2,273
| -36% | -$269K |
|
646
Materials Select Sector SPDR Fund
XLB
$5.44B
| $480K | ﹤0.01% |
+5,439
| New | +$480K |
|
647
Harrow
HROW
$1.44B
| $478K | ﹤0.01% |
+22,916
| New | +$478K |
|
|
HES
648
DELISTED
Hess
HES
| $477K | ﹤0.01% |
3,235
-3,349
| -51% | -$494K |
|
649
Patterson-UTI
PTEN
$2.11B
| $475K | ﹤0.01% |
+45,925
| New | +$475K |
|
650
Revvity
RVTY
$9.58B
| $473K | ﹤0.01% |
4,519
-3,852
| -46% | -$403K |
|