The mechanism: The nuclear triad — ICBMs, submarines, bombers — is being rebuilt all at once for the first time since the Reagan era, and the two biggest line items just blew through their budgets in the same twelve months. Northrop's Sentinel ICBM program triggered a "critical" Nunn-McCurdy breach in January 2024, with unit costs projected 81% over baseline and total program cost near $141 billion, per the Pentagon's own review. General Dynamics' Columbia-class ballistic-missile submarine, built at Electric Boat, has slipped its lead-ship delivery from 2027 to 2028 and carries a class price tag north of $130 billion. Nunn-McCurdy forces a formal certify-or-cancel review, but the Pentagon has publicly bet the triad's land leg on Sentinel and the sea leg on Columbia — both were reaffirmed rather than killed. That's the tell: these programs are now too strategically load-bearing to lose funding outright, which means budget pressure gets displaced sideways, onto sustainment accounts, force-structure line items, and the other leg of the triad, rather than onto Sentinel or Columbia themselves.

Who cashes in:

  • NOC — Sentinel is Northrop's, full stop, on a sole-source, cost-plus contract structure that insulates it from the overrun itself; a program this politically irreversible (survived Nunn-McCurdy, is the literal land-based deterrent) means Northrop's backlog is durable even as costs run hot — cost growth on a cost-plus vehicle flows largely to the customer, not the shareholder.
  • GD — Electric Boat is the sole U.S. builder capable of Columbia-class construction; a schedule slip that would sink a commercial contractor instead pulls in more funding via the Navy's submarine industrial-base investment accounts, since the fix for "late" is more workers, more suppliers, more capital — all billed to the program.
  • HII — Huntington Ingalls builds the bow and stern modules for Columbia and is the only other yard with hull-integration expertise; any surge funding aimed at unclogging the submarine supply chain runs through both GD and HII simultaneously.
  • LHX — L3Harris supplies strategic-systems electronics and secure communications common to both the ICBM and SSBN legs, making it a rare name that profits regardless of which program wins the next dollar.