A $5.7 billion cash bid has replaced a $7 billion stock-based agreement involving Synaptics, lifting shares of both companies on the day the revised structure became public. Synaptics surged 14%, while On Semiconductor (onsemi) climbed 8%.

What changed in the deal structure?

The headline number dropped by roughly $1.3 billion — about 19% — when the consideration shifted from stock to cash. Both stocks still rose sharply, which signals the market views the new terms as more attractive than the original equity swap, not less.

In a stock-for-stock transaction, the per-share value floats with each party's share price between signing and closing. A fixed cash bid removes that variable, a feature target shareholders typically reward with a tighter closing price.

Why did both stocks move higher together?

The conventional M&A pattern is straightforward. The target's stock rises on the takeover premium; the acquirer's falls on dilution and balance-sheet strain. Both climbing on the same headline is unusual and worth dissecting.

Synaptics' 14% gain is consistent with a premium being affirmed under the new cash terms. Onsemi's 8% rise suggests investors do not see $5.7 billion in cash as a capital-structure problem severe enough to offset the strategic value of the target.

What does the switch to cash actually signal?

A reversion to all-cash consideration typically means the acquirer has secured committed financing and is willing to absorb execution risk in exchange for closing certainty. The market's reception suggests that bet is paying off — at least on day one.

Stock-for-stock structures have dominated semiconductor M&A in recent years as a way to share post-close risk. Switching to cash mid-process is uncommon, and the share-price response reads as confidence, not pressure.

What remains undisclosed

The Yahoo Finance headline carries no management commentary, no premium-to-undisturbed-price disclosure, and no closing timeline. Without a definitive agreement filing or executive quotes, the mechanics of the revised transaction sit outside the public record.

Neither company has commented in the materials cited. The 8% and 14% one-day moves are the only verified data points the market has absorbed so far.

What happens next?

The next checkpoint is a definitive merger filing, which would set out the per-share cash consideration, the financing commitments backing the $5.7 billion, and any regulatory review schedule. Those documents will reset the premium math previously benchmarked to the $7 billion stock swap.

Until that filing lands, the share-price reaction is the market's sole verdict on the restructured deal. On this evidence, both sets of shareholders are treating the new terms as an upgrade — and pricing the closing-certainty premium accordingly.