Not an SEC registrant

Polyphase System INC

Customers

1 prime contractor

Suppliers

None disclosed

Largest customer

—

No % disclosed

Named-customer revenue

—

No estimate available

Band height is the estimated dollar value: the disclosed share × the discloser's revenue for that period (latest full year where available) or federal dollars obligated. Each side is scaled on its own; dashed outlines are named without a figure. Click a band to open its source.

Federal subcontracts received 1

Prime contractors that subcontracted federal work to this company. From USAspending.gov subaward reports; amounts are as reported by the prime contractor, latest report per subaward, $500K+ a year.

Company	Subawards	Fiscal year	Count	Trend	Largest subaward
Granite-obayashi 2, A Joint Venture	$1.9M	FY 2026	2	$14.5M → $1.9M	N6274225F9998
PROVIDE PLUMBING AND HVAC SYSTEM FOR THE FOLLOWING... SWITCHGEAR BUILDING PLUMBING, SWITCHGEAR BUILDING HVAC, FIRE PUMP BUILDING PLUMBING, FIRE PUMP BUILDING HVAC, SECURITY FORCES OFFICE PLUMBING, SECURITY FORCES OFFICE HVAC, ADDITIONAL HVAC UNITS, TAB AND DALT REVALIDATED PRICE Prime award N6274225F9998 on USAspending.gov ↗ Subaward 09.07.11: $942.5K · Department of Defense (DOD)

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