What if you'd held ARM?
A $1,000 investment in Arm Holdings plc (ARM) at the month-end close of 2023-09 would be worth $4,659 at the close of 2026-08 — +365.9% total return, dividends reinvested. The same $1,000 in the S&P 500 would be worth $1,798.
Your scenario
Result
If you'd bought $1,000 at the start of each year
Value of $1,000 invested on January 1 of each year, held to 2026-08, dividends included. Click any year for the full story.
Every year, $1,000 from 2023
| Year | Value of $1,000 | Year return |
|---|---|---|
| 2023 | $1,000 | — |
| 2024 | $1,642 | +64.2% |
| 2025 | $1,455 | -11.4% |
| 2026 | $3,318 | +128.1% |
Best and worst month-end to buy
The best single month-end close to have bought ARM was 2023-10 ($49.29): $1,000 then is $5,059 today. The worst was 2026-06 ($355): $1,000 then is $703.
FAQ
What would $1,000 in ARM be worth today?
A $1,000 investment in Arm Holdings plc (ARM) at the start of 2023 would be worth about $4,659 today, a total return of +365.9%. Dividends are reinvested in these figures.
What were the best and worst years for ARM?
Arm Holdings plc (ARM)'s strongest calendar year since 2023 was 2026, a +128.1% return — $1,000 held through that year became about $2,281 by year-end. Its weakest year was 2025, at -11.4%.
Does the calculator include dividends and splits?
Yes where available. Prices are adjusted for both stock splits and reinvested dividends (total return), the same measure brokerages use.
How much would $100 per month in ARM have grown?
Investing $100 at the end of every month since 2023-09 would have grown to about $7,447 on $3,600 invested.
Did ARM beat the S&P 500?
Over the same period, $1,000 in the S&P 500 index would be worth $1,798. ARM beat the S&P 500 by +159.2% in total return.
Is this investment advice?
No. What If I'd Held is an entertainment and education tool. Every number is a historical calculation, not a prediction, and past performance never guarantees future results.
Methodology
Arm Holdings plc (ARM) historical total-return data from 2023-09 to 2026-08, reduced to month-end closes for the tables above.
Returns use adjusted close prices from Yahoo Finance historical data — adjusted for stock splits and reinvested dividends — the same convention used by major brokerages. A "year" scenario invests $1,000 at the prior December's month-end close and values it at the latest available month-end close.
Month-end resolution means intra-month extremes are not captured in tables; the calculator uses exact trading-day closes where daily data is available. Figures ignore taxes, fees, and the currency effects of non-USD listings. History is not a forecast. What If I'd Held is entertainment, not investment advice.
What if you'd held…
Data: adjusted close prices via Yahoo Finance. As of 2026-08. Not financial advice.