The structure is what makes this one worth reading closely. On June 28, 2026, Rocket Lab Corporation signed an Agreement and Plan of Merger to acquire Iridium Communications Inc., and both companies laid out the terms in 8-Ks filed June 29. Iridium holders are set to receive $27.00 in cash for each share plus a slug of Rocket Lab stock — a cash-and-stock deal that folds a global low-Earth-orbit satellite-communications operator into a company built around launch and space systems.

What separates this from a plain cash bid is the collar on the stock leg. The filing defines an “Exchange Ratio” that moves with Rocket Lab’s share price: 0.4000 Rocket Lab shares per Iridium share if Rocket Lab’s reference price is $67.50 or less; 0.2400 shares if that price is $112.50 or more; and, in between, “the quotient obtained by dividing $27.00 by the Rocket Lab Common Stock Price, rounded to four decimal places.” The reference price itself is a mechanical figure — the volume-weighted average price of Rocket Lab stock on the Nasdaq Global Select Market over the ten consecutive trading days ending on the second full trading day before closing.

Run the arithmetic the collar sets up and the intent becomes legible. Inside the band, because the ratio is $27.00 divided by the price, the stock consideration is worth a fixed $27.00 per Iridium share regardless of where Rocket Lab trades — pairing with the $27.00 cash for $54.00 of value. Below $67.50, the ratio locks at 0.4000, so the stock leg is worth 0.4000 times the price, i.e. less than $27.00 and falling with the stock. Above $112.50, the ratio locks at 0.2400, so the stock leg is worth more than $27.00 and rises with it. The collar hands Iridium holders a fixed dollar amount across a wide middle range and only lets the value float once Rocket Lab moves outside a roughly $67.50–$112.50 corridor. The 8-K bodies stop there: they do not disclose an aggregate equity or enterprise value, so any headline number is not in this record.

How the deal is wired

Mechanically this is a two-step, or double-dummy, merger. A Rocket Lab subsidiary, Ion Merger Sub I, first merges into Iridium, which survives as an indirect wholly owned subsidiary; that entity then merges into a second subsidiary, Ion Merger Sub II, which survives. The two steps together are “the Transaction.” The design has a tax purpose stated plainly in the filing: the deal is “generally intended to qualify as a tax-free reorganization” so long as the value of the stock consideration relative to the cash meets the conditions for that treatment — and if it does not, the second merger simply does not occur and the reorganization is not tax-free. That contingency is the reason the stock/cash mix matters beyond price: it governs whether the exchange lands as tax-free to holders.

Iridium’s equity awards travel with the deal rather than cashing out. Outstanding restricted stock units and performance units are assumed by Rocket Lab and converted into Rocket Lab RSUs using an Equity Award Exchange Ratio equal to the cash consideration divided by Rocket Lab’s reference price plus the Exchange Ratio, with performance conditions deemed met at target and full vesting if a holder is terminated without cause within twelve months of closing. Once the first merger closes, Iridium common stock is delisted from Nasdaq and deregistered.

The deal-protection terms

For anyone weighing how locked-in this is, the protection package is where the filing earns its keep. Iridium is bound by customary “no-shop” restrictions, is required to hold a stockholder vote on the merger, and its directors — in their capacity as stockholders — signed a Support Agreement on June 28, 2026 agreeing to vote their shares for the deal and against any competing proposal. Those directors beneficially own roughly 1.6% of Iridium’s outstanding shares, so the support agreement is a signal of board alignment, not a lock on the outcome; the deal still turns on a vote of the broader holder base.

The price of walking is spelled out precisely.

The Merger Agreement provides for the payment of a termination fee of $223.62 million by Iridium to Rocket Lab upon termination of the Merger Agreement under specified circumstances— Rocket Lab Corporation, Form 8-K (Item 1.01), filed June 29, 2026, sec.gov

That $223.62 million fee is payable by Iridium — not Rocket Lab — in defined scenarios, chiefly if Iridium terminates to accept a Superior Proposal or if its board withdraws its recommendation. The 8-K bodies describe no reverse termination fee running the other way. The timeline is bounded by an outside date of June 28, 2027, which can be extended to September 28, 2027 and December 28, 2027 under the agreement’s terms — extension hooks that typically exist to accommodate a longer regulatory review. Closing is conditioned on Iridium stockholder adoption, regulatory approvals and other customary conditions.

Reading the strategic logic without leaving the filing

Strip the transaction to what the documents actually say and it is a consolidation across two adjacent layers of the orbital economy: a company whose business is putting hardware into orbit acquiring one whose business is operating a constellation already there. Iridium runs a global LEO satellite-communications network; Rocket Lab builds and launches spacecraft and space systems. The filing does not editorialize on synergies, and neither will we — the joint press release and investor presentation furnished under Item 7.01 sit outside the binding Item 1.01 disclosure, and the operative facts are the terms above.

What the 8-Ks do establish is a fully executed, board-approved agreement with a collared exchange ratio, a director support agreement, a nine-figure break fee and a hard outside date — the architecture of a deal built to close. The variables still in play are the ones the filing itself flags: the stockholder vote, regulatory clearances, and where Rocket Lab’s stock sits in that ten-day window before closing, which determines both the share count Iridium holders receive and whether the tax-free step survives. The receipts to watch from here are the proxy, the regulatory filings, and Rocket Lab’s trading relative to the $67.50 and $112.50 rails that bound the collar.