**You’re right about the immediate cash flow:** when one investor sells existing shares to another, the company normally receives none of that money. A falling share price does not, by itself, drain the company’s bank account.

But the iPhone analogy misses an important difference: **a share is an ownership stake in the company.** The buyer and seller are therefore directly connected to it as owners. Shares carry claims on the company’s assets and profits, and usually voting rights. [Investor.gov’s explanation of stock](https://www.investor.gov/introduction-investing/investing-basics/glossary/stock)

That gives companies several reasons to care:

- **Future fundraising.** A company may want to issue more shares later. Suppose it needs $100 million: at $100 per share, it would need to sell 1 million new shares; at $10, it would need to sell 10 million. The lower price means giving up more ownership to raise the same amount, diluting existing shareholders more.

- **Buying other companies.** A company can pay for an acquisition with its own shares. A higher valuation generally lets it offer the same purchase value using fewer shares.

- **Employee and executive compensation.** Many employees receive shares or stock options. A falling price can reduce the value of their compensation, making recruitment and retention harder. It also affects managers’ personal wealth when they own stock. For example, Garmin uses shares for options, restricted stock awards, and its employee share purchase plan. [Garmin annual report](https://www.sec.gov/Archives/edgar/data/1121788/000095017025057074/grmn-ars-20241228.pdf)

- **Ownership and management control.** Shareholders can vote to elect directors, who oversee management. Dissatisfied owners can push for changes, and a low valuation can make acquiring control more affordable—although voting structures and other protections matter. [Investor.gov’s explanation of shareholder voting](https://www.investor.gov/shareholder-voting)

There is also a basic distinction between **the company’s cash** and **its owners’ wealth**. Management runs the business on behalf of its owners, so it has reason to care about the value of their investment even when no cash enters or leaves the company.

Your intuition still holds in a limited case: a financially independent company that needs no new equity, makes no share-funded acquisitions, and pays no stock compensation could experience relatively little immediate operational effect from price fluctuations. **Share price matters, but every daily movement does not necessarily matter to the business.**