Ukraine says it has agreed a new package of Patriot interceptors, but Kyiv will not say from whom or how many, but Ukrainian President Volodymyr Zelenskiy admitted Kyiv was receiving fresh ammo in the single digits from some allies.

"Today we agreed, I won't say with whom, on a package of missiles for Patriot systems. An important decision, very important. There is a result,"  Zelenskiy told members of the Ukrainian community in the US, Ukrainska Pravda reported on September 24. He gave no numbers and no delivery date.

The announcement came hours after Russia fired three waves of ballistic missiles at Kyiv overnight on September 24, killing two people, injuring at least six and damaging a maternity hospital in the Podilskyi district.

The good news was Ukraine shot down 60% of the incoming ballistic missiles, Zelenskiy told journalists in New York, double the intercept rate of 29% in July, which means some of the new interceptors have already arrived and being put to good usue. 

The Patriot is still the only system in Ukraine's arsenal that reliably kills ballistic missiles, and the PAC-3 rounds it fires are built almost entirely in the US on production lines that are booked for years ahead. An undisclosed package buys Kyiv a few more nights of cover. It does nothing to close the gap between how fast Russia builds missiles and how fast the West builds interceptors, and that gap will decide how much of Russia's winter campaign to freeze Ukraine into submission gets through.

"Against ballistic missiles, only Patriot interceptors work for now, and they are needed practically every day," Zelenskiy said after meeting Nato Secretary-General Mark Rutte in New York, Kyiv Post reported. The two discussed how Ukraine's partners could assemble a winter air-defence package.

One or two at a time

Zelenskiy described the hunt for rounds as piecework. "We are collecting hundreds one or two missiles at a time," he said, adding that some requests have to be settled leader-to-leader because talks between officials go nowhere when stocks are this thin. Only the US has the capacity to help on a large scale, he said, and he has asked President Donald Trump for more.

The 60% figure is the good news. Zelenskiy admitted that in some raids this year Ukraine brought down only 10% of the ballistic missiles fired at it, and in others none at all. "It's not because someone lacks experience. Someone lacks missiles," he said. In early July Ukraine downed only four of 54 ballistic missiles in a single raid, and on August 5 Russia fired 24 ballistic missiles at Kyiv without one being intercepted.

The maths of ballistic defence

Patriot crews typically fire two interceptors at each incoming ballistic missile. Zelenskiy set out the ratio himself in July, saying Ukraine needed at least 140 Patriot rounds to see off about 70 ballistic missiles, Euronews reported. Russia has lately launched up to 30 ballistic missiles in a single night. At two rounds apiece, one such raid can consume 60 interceptors, a fifth of the roughly 300 Zelenskiy asked Washington to supply for the whole winter.

Even the improved rate still leaves four missiles in ten landing. And Russian output is rising: Ukraine's military intelligence says Moscow's production of key missiles is running 10-20% above target, with some models well above that.

Zelenskiy spent the summer sounding increasingly desperate as Ukraine's interceptor missiles ran dry, touring capitals in search of rounds that mostly did not exist.

America's production line

Lockheed Martin delivered a record 620 PAC-3 MSE interceptors in 2025 and, under a seven-year framework agreement signed with the Pentagon in January, aims to lift annual capacity from about 600 to 2,000 rounds. In July the US awarded Lockheed a contract worth up to $53.9bn to expand production, The Defense Post reported, with capacity due to triple by the end of 2030.

That is help for 2028, not for this winter. Demand has outrun supply since the US and its Gulf allies fired hundreds of interceptors in the opening days of the Iran war; the Center for Strategic and International Studies estimates Washington has used up around two-thirds of its Patriot stocks fighting Iran.

"The demand is outpacing supply, and we're going to have to really dig deep," US Ambassador to Nato Matthew Whitaker said on September 18, Radio Free Europe/Radio Liberty reported. Licensed production in Ukraine, he added, "is still not going to solve this winter's problem. It will solve the long-term problem."

Trump first offered Kyiv a Patriot licence at the Nato summit in Ankara in July, and the two leaders discussed it again in New York on September 22. The State Department says no final decision has been taken, and Raytheon and Lockheed have privately worried that Ukraine could end up building the missile faster and cheaper than they do.

Europe has money, not missiles

The European Commission approved Patriot purchases under the €90bn Ukraine Support Loan in mid-September, but spokesperson Balazs Ujvari said on September 18 that Brussels could not release the money until Kyiv submitted signed contracts, European Pravda reported. The US arms sale worth $2.68bn approved the same day contains no Patriot interceptors at all.

"We have missiles contracted for five years in advance, but they will be in five years," Yehor Chernev, chairman of the Ukrainian parliament's national security committee, said, Kyiv Post reported on September 21. He wants European governments to hand over the rounds sitting in their own warehouses now and refill them from future production.

So far they have trickled out in small batches, such as the five missiles Spain pledged in March. South Korea turned down a request for PAC-3 rounds in August. Germany is pressing Washington to allow PAC-3 production in Europe, though MBDA's German plant is gearing up to make the older PAC-2 GEM-T, which is built mainly for aircraft and cruise missiles. Poland has joined a European anti-ballistic coalition set up in July to develop a cheaper alternative to the Patriot, which is years from service.

What the package does not solve

The better intercept rate on September 24 suggests some rounds have already arrived, or that Ukraine is getting more out of substitutes, Kyiv Post noted. The new package adds to that. It does not tell Kyiv how many interceptors it will have in the depths of winter, when Russia has aimed its heaviest strikes at the power grid in past years.

The pieces that would change the balance are all on a longer clock: Lockheed's tripled output lands at the end of the decade, a Ukrainian licence is undecided, European PAC-3 lines need Washington's permission, and the European interceptor is still a design. Until then Ukraine's air defence depends on how many rounds Zelenskiy can prise out of other leaders' warehouses, one or two at a time.