NEW YORK, July 16, 2026, 12:06 p.m. EDT
- U.S. markets were open. Rocket Lab traded down 11.2% near midday.
- A full-duration Neutron upper-stage engine test lasted nearly 5.5 minutes.
- Iridium Communications NASDAQ:IRDM offered a 14.4% preliminary gross deal spread.
Rocket Lab Corporation NASDAQ:RKLB shares fell 11.2% to $67.63 around midday Thursday. They traded as low as $67.20, below the deal’s $67.50 lower collar.
That threshold is not merely technical. At or below it, Iridium Communications Inc. NASDAQ:IRDM holders receive 0.4 Rocket Lab shares and $27 cash. Every $1 below the floor removes 40 cents from the stock payout.
Inside the collar, a lower price raises the exchange ratio. That preserves $27 of stock value. Below $67.50, the protection ends and incremental risk shifts toward Iridium holders.
The final calculation uses a 10-day volume-weighted average price before closing. Thursday’s brief breach therefore does not set the final consideration.
Still, the line matters now. A preliminary estimate based on live market value puts Thursday’s Rocket Lab equity loss near $5.2 billion.
The spot-price comparison shows the collar’s asymmetry. Final consideration will use the specified closing VWAP.
| Measure | Value | Investor implication |
|---|---|---|
| Rocket Lab intraday low | $67.20 | $0.30 below the lower collar |
| Lower collar reference | $67.50 | Exchange ratio capped at 0.4000 |
| Illustrative value at the low | $53.88 per IRDM share | Preliminary: $27 cash plus $26.88 stock |
| Iridium midday price | $47.08 | $6.80, or 14.4%, gross spread |
The engine news was positive. Rocket Lab completed a full-duration AVac burn at NASA’s Stennis Space Center. The test lasted just under 5.5 minutes.
It cleared one propulsion milestone. Rocket Lab called it “critical preparation for Neutron’s first flight.” Its latest quarterly filing still targets a debut later in 2026. Space
That timetable remains an estimate. Rocket Lab warned that development complexity could cause further delays. First-quarter research spending rose 46% to $80.5 million.
Piper Sandler Companies NYSE:PIPR analyst Alexander Potter started coverage with a Neutral rating and an $83 target. His note favored AST SpaceMobile NASDAQ:ASTS, citing its “more palatable valuation” and clearer EBITDA path. TipRanks
The broader tape was weak. Invesco QQQ Trust NASDAQ:QQQ fell 1.0% as chip shares led losses. Rocket Lab underperformed it by about 10.3 percentage points.
Financing also looms. Rocket Lab has commitments for a $3.6 billion bridge facility. That equals 2.4 times its March cash and marketable securities.
Iridium supplies the financial offset. It reported $871.7 million of 2025 revenue and $495 million of company-defined OEBITDA. Those recurring cash flows underpin the acquisition case.
Risks remain. Neutron’s debut could slip, while approvals may delay the transaction. A qualifying VWAP below $67.50 would cut Iridium’s stock consideration. New equity financing could dilute Rocket Lab holders.
The price action suggests investors are treating Rocket Lab as merger currency first. For now, financing terms matter more than another successful engine burn.
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