A rival bid showed up, and onsemi cut its Synaptics deal to $5.7 billion in cash

Two chip companies renegotiated a merger on Thursday evening, and both stocks went up. That does not happen often, and the reason is worth unpacking.

onsemi and Synaptics announced an amendment to their June 25, 2026 merger agreement. Under the revised terms, onsemi acquires Synaptics for $123 per share in cash — an aggregate value of approximately $5.7 billion, compared with roughly $7 billion under the original deal. The amendment came after what both companies described as an unsolicited competing proposal received from a third party. Synaptics' board unanimously supported the amended transaction.

Lower headline value, cleaner structure

The aggregate number fell, but the form of the consideration changed at the same time: the revised agreement is all cash, where the prior one was not. onsemi also withdrew its S-4 registration statement, the filing a company needs when it is issuing stock as part of the consideration. For Synaptics shareholders, that trade is price certainty against a lower nominal headline — no exchange-ratio risk between signing and closing, and no exposure to onsemi's own share price in the interim.

The financing is committed. Morgan Stanley has provided up to $2.45 billion in senior secured term-loan commitments to fund part of the merger consideration and related fees, subject to customary conditions, with the balance from cash on hand. The companies note that financing is not a condition to closing.

Why both tickers rose

Synaptics shares jumped about 14.5% in Friday pre-market trading, quoted near $121.50 — just under the $123 cash price, which is how an arbitrage spread normally looks once a deal is seen as likely to close. Thursday's regular session had already closed at $106.15, up 4.68%.

onsemi was up about 6.4% at around $85.21 in Friday's early trade on roughly four times average relative volume, after closing Thursday at $80.08, up 4.18%. Acquirers usually trade down on a takeover announcement. Here the acquirer is paying roughly $1.3 billion less than it had agreed to, in a structure that avoids issuing dilutive stock, for an asset it has already cleared with the Federal Trade Commission. That reads as a better deal for onsemi than the one it signed in June — which is exactly what a competing bidder appearing and failing to prevail implies.

What onsemi says it gets

onsemi expects the transaction to be immediately accretive to its non-GAAP earnings per share. Beyond the $200 million of annual run-rate synergies disclosed with the original agreement, the company has identified incremental revenue-synergy and production-insourcing opportunities, which it expects to materialize after the first 18 months following close.

Production insourcing is the strategically interesting piece. Synaptics designs human-interface and connectivity silicon — touch, display and IoT wireless parts — that is largely built by outside foundries. onsemi runs its own fabs. Moving a portion of that volume into owned capacity is both a cost lever and a utilization lever, and utilization is what determines margins in an analog and mixed-signal business through a cycle.

The deal calendar from here

• Timing: closing is still expected by mid-2027.
• Approvals outstanding: Synaptics shareholder approval, plus regulatory clearances outside the United States. The FTC has already approved the transaction and other jurisdictions are reviewing it.
• Structure risk: with financing committed and not a closing condition, and consideration in cash, the main remaining variables are the shareholder vote and non-US regulators.

A shareholder vote on lower nominal consideration is not automatic, even with a unanimous board recommendation. The counterargument available to onsemi and the Synaptics board is that the competing proposal was examined and that cash certainty at $123 was judged superior to the prior structure's paper value — an argument the proxy will have to make in detail.

The wider context

This is the second consecutive session in which semiconductor consolidation set the tone for the group, and it lands in a week when chip names were among the few sectors leading an otherwise yield-dominated tape. Thursday's session saw information technology among the leading sectors as chip stocks climbed.

Analog and mixed-signal consolidation has its own logic separate from the AI-accelerator story that dominates headlines: these are scale businesses where the acquirer's fab footprint, not model training demand, determines whether a deal pays. The structure of this amendment — cash, committed debt, insourcing synergies, accretive on day one — is the clearest statement of that logic this quarter.

What to watch

Watch the proxy for how the competing proposal is described, including price and bidder characterization; watch onsemi's leverage profile once the $2.45 billion term loan is drawn; and watch whether other analog and interface-chip names re-rate on the read-through that strategic buyers are willing to put committed cash on the table at this point in the cycle.

Figures are from the onsemi and Synaptics joint announcement and onsemi's related 8-K filing of October 1, 2026, with share prices from Thursday's close and Friday's pre-market session. Invested Alpha does not hold positions in the securities discussed.