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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
$23.3M |
| 3 |
Pinduoduo
PDD
|
$17.3M |
| 4 |
Pfizer
PFE
|
$16.8M |
| 5 |
American Airlines Group
AAL
|
$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$38.1M |
| 3 |
AutoZone
AZO
|
$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$25.3M |
| 5 |
Apple
AAPL
|
$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
26
Trade Desk
TTD
$26.7B
| $10.1M | 0.02% | 15,439 +8,492 | +122% | +$5.53M |
|
|
SPLK
27
DELISTED
Splunk Inc
SPLK
| $9.98M | 0.02% | +73,641 | New | +$9.98M |
|
28
GE Aerospace
GE
$292B
| $9.45M | 0.02% | 719,925 +613,461 | +576% | +$8.05M |
|
29
TSMC
TSM
$1.2T
| $9.34M | 0.02% | 78,947 +57,613 | +270% | +$6.81M |
|
30
General Motors
GM
$55.8B
| $9.05M | 0.02% | 157,528 -198,114 | -56% | -$11.4M |
|
31
Pinterest
PINS
$24.9B
| $8.86M | 0.02% | +119,718 | New | +$8.86M |
|
32
ServiceNow
NOW
$190B
| $8.44M | 0.02% | 16,871 +14,428 | +591% | +$7.22M |
|
33
Southwest Airlines
LUV
$17.3B
| $8.4M | 0.02% | 137,557 -16,626 | -11% | -$1.02M |
|
34
Microsoft
MSFT
$3.77T
| $8.1M | 0.01% | 34,341 +34,291 | +68,582% | +$8.08M |
|
35
Intel
INTC
$107B
| $7.43M | 0.01% | 116,132 -13,466 | -10% | -$862K |
|
36
iShares Global Clean Energy ETF
ICLN
$1.56B
| $7.18M | 0.01% | 295,429 +285,685 | +2,932% | +$6.94M |
|
37
Skyworks Solutions
SWKS
$11.1B
| $7.17M | 0.01% | 39,073 +16,483 | +73% | +$3.02M |
|
38
Twilio
TWLO
$16.2B
| $7.06M | 0.01% | 20,704 +17,906 | +640% | +$6.1M |
|
39
Baidu
BIDU
$32.8B
| $7.05M | 0.01% | 32,397 +15,889 | +96% | +$3.46M |
|
40
Fiverr
FVRR
$870M
| $6.85M | 0.01% | 31,528 +18,624 | +144% | +$4.04M |
|
|
WORK
41
DELISTED
Slack Technologies, Inc.
WORK
| $6.82M | 0.01% | 167,959 +167,609 | +47,888% | +$6.81M |
|
42
iShares Expanded Tech-Software Sector ETF
IGV
$9.84B
| $6.79M | 0.01% | +19,894 | New | +$6.79M |
|
43
Ford
F
$46.8B
| $6.74M | 0.01% | 550,304 +500,304 | +1,001% | +$6.13M |
|
44
Colgate-Palmolive
CL
$67.9B
| $6.69M | 0.01% | 84,844 +34,702 | +69% | +$2.74M |
|
45
Li Auto
LI
$23.7B
| $6.64M | 0.01% | 265,627 -118,889 | -31% | -$2.97M |
|
46
Kohl's
KSS
$1.69B
| $6.49M | 0.01% | 108,878 -59,246 | -35% | -$3.53M |
|
47
Rocket Companies
RKT
$37.4B
| $6.48M | 0.01% | 280,550 +206,579 | +279% | +$4.77M |
|
48
Lucid Motors
LCID
$6.08B
| $6.39M | 0.01% | +275,781 | New | +$6.39M |
|
49
Intuitive Surgical
ISRG
$170B
| $6.02M | 0.01% | 8,152 +4,960 | +155% | +$3.66M |
|
50
ASML
ASML
$292B
| $5.93M | 0.01% | +9,613 | New | +$5.93M |
|