Mainstem LLC

The Contractor Shall Provide All Necessary Materials, Labor, Equipment and Facilities Incidental to the Performance of This Requirement in Accordance With the Terms of the Order.

Committed

$500

Paid to

Mainstem LLC

UEI SXHHGF88NPK4

51 Monroe ST Ste, Rockville, MD, 20850

Department of Defense

Missile Defense Agency

Missile Defense Agency (Mda)

Performance

Dec 29, 2025

Competition

Full and open competition

How to read these numbers

One award, start to finish: Everything here is this single award's whole record — signed, amended, paid — not a fiscal-year slice. The by-year charts elsewhere split an award across the years it was committed; this page keeps it whole.
Committed vs. ceiling: Committed is what the government has legally promised on this award so far. Contracts can also carry a ceiling — the maximum if every option is exercised. Unspent ceiling is headroom, not money owed.
Paid out: The cash actually disbursed against this award. The gap from committed is the disbursement pipeline: promised, not yet cashed.
The ledger: Each transaction is a signing event — an action that created or changed the award, dated the day it was signed — not a payment. Negative amounts are real: money de-committed at closeout or renegotiation.
The money bar: One bar, the award’s whole arithmetic: paid out, then committed, not yet paid, then .

Source

This award on USAspending.gov ↗

Federal contract vehicle · indefinite delivery / indefinite quantity

Department of Defense

Missile Defense Agency to

Mainstem LLC

The Contractor Shall Provide All Necessary Materials, Labor, Equipment and Facilities Incidental to the Performance of This Requirement in Accordance With the Terms of the Order.

Committed

$500

Paid to

Mainstem LLC

UEI SXHHGF88NPK4

51 Monroe ST Ste, Rockville, MD, 20850

Department of Defense

Missile Defense Agency

Missile Defense Agency (Mda)

Performance

Dec 29, 2025

Competition

Full and open competition

How to read these numbers

One award, start to finish: Everything here is this single award's whole record — signed, amended, paid — not a fiscal-year slice. The by-year charts elsewhere split an award across the years it was committed; this page keeps it whole.
Committed vs. ceiling: Committed is what the government has legally promised on this award so far. Contracts can also carry a ceiling — the maximum if every option is exercised. Unspent ceiling is headroom, not money owed.
Paid out: The cash actually disbursed against this award. The gap from committed is the disbursement pipeline: promised, not yet cashed.
The ledger: Each transaction is a signing event — an action that created or changed the award, dated the day it was signed — not a payment. Negative amounts are real: money de-committed at closeout or renegotiation.
The money bar: One bar, the award’s whole arithmetic: paid out, then committed, not yet paid, then .

Source

This award on USAspending.gov ↗