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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
626
First Financial Bankshares
FFIN
$5.13B
| $500K | ﹤0.01% |
13,530
+6,740
| +99% | +$249K |
|
627
Comerica
CMA
$8.9B
| $497K | ﹤0.01% |
+8,302
| New | +$497K |
|
628
Fortive
FTV
$16.2B
| $493K | ﹤0.01% |
+6,254
| New | +$493K |
|
629
Invesco Mortgage Capital
IVR
$515M
| $491K | ﹤0.01% |
52,361
+12,713
| +32% | +$119K |
|
630
Zimmer Biomet
ZBH
$20.3B
| $490K | ﹤0.01% |
4,543
-12,627
| -74% | -$1.36M |
|
631
WD-40
WDFC
$2.85B
| $487K | ﹤0.01% |
1,889
-1,271
| -40% | -$328K |
|
632
Bumble
BMBL
$682M
| $477K | ﹤0.01% |
74,894
+27,914
| +59% | +$178K |
|
633
iShares Core US Aggregate Bond ETF
AGG
$132B
| $476K | ﹤0.01% |
+4,707
| New | +$476K |
|
634
Vanguard Real Estate ETF
VNQ
$34.4B
| $473K | ﹤0.01% |
4,858
-17,827
| -79% | -$1.74M |
|
635
Hallador Energy
HNRG
$763M
| $472K | ﹤0.01% |
50,118
+19,243
| +62% | +$181K |
|
636
Simpson Manufacturing
SSD
$7.97B
| $471K | ﹤0.01% |
2,463
+1,790
| +266% | +$342K |
|
637
Corsair Gaming
CRSR
$929M
| $467K | ﹤0.01% |
67,235
+50,213
| +295% | +$349K |
|
638
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.67B
| $466K | ﹤0.01% |
8,686
+6,411
| +282% | +$344K |
|
639
Illinois Tool Works
ITW
$76.5B
| $461K | ﹤0.01% |
+1,762
| New | +$461K |
|
640
C4 Therapeutics
CCCC
$188M
| $458K | ﹤0.01% |
80,499
+38,398
| +91% | +$218K |
|
641
W.W. Grainger
GWW
$47.5B
| $458K | ﹤0.01% |
+441
| New | +$458K |
|
642
Centrus Energy
LEU
$3.99B
| $458K | ﹤0.01% |
8,361
-66
| -0.8% | -$3.62K |
|
643
Amplify Energy
AMPY
$161M
| $457K | ﹤0.01% |
69,988
+32,877
| +89% | +$215K |
|
644
Boise Cascade
BCC
$3.21B
| $457K | ﹤0.01% |
3,247
+2,354
| +264% | +$331K |
|
645
Sprout Social
SPT
$816M
| $457K | ﹤0.01% |
15,750
+2,175
| +16% | +$63.1K |
|
646
Grindr
GRND
$2.96B
| $456K | ﹤0.01% |
+38,247
| New | +$456K |
|
647
Civitas Resources
CIVI
$3.13B
| $454K | ﹤0.01% |
8,971
+8,338
| +1,317% | +$422K |
|
648
Aurora
AUR
$10B
| $453K | ﹤0.01% |
76,639
+44,358
| +137% | +$262K |
|
649
Ecopetrol
EC
$19.4B
| $453K | ﹤0.01% |
+50,821
| New | +$453K |
|
650
Sandstorm Gold
SAND
$3.4B
| $447K | ﹤0.01% |
74,563
-3,168
| -4% | -$19K |
|