Data center campus · WingHaven development, O'Fallon, St. Charles County, Missouri
Mastercard Global Technology and Operations center, O'Fallon
Operating
as of Feb. 2026
Mastercard owns and runs its main technology and operations campus in O'Fallon's WingHaven development, which pairs three office wings with a three-story data center. Also known as: Mastercard GTO headquarters, WingHaven campus.
PowerNot statedNot reported in the records found
Who is behind it
ProjectMastercard Global Technology and Operations center, O'FallonAlso: Mastercard GTO headquarters, WingHaven campus
Developer and teamMastercard
End userMastercard
The record, newest first
Mastercard's 10-K for 2025 lists the O'Fallon center as its principal technology and operations site, which the company owns. (Mastercard Incorporated (SEC), Feb. 2026)
BD+C described the 550,000 sq ft O'Fallon campus, three four-story office wings joined to a three-story data center in WingHaven, as completed the previous September. (Building Design+Construction, Aug. 11, 2010)
Conflicts and open questions
- No MW figure appears in any opened source.
- Data center floor area not confirmed from an opened source (a 75,000 sq ft figure attributed to builder PARIC was not opened), so sqft is blank; BD+C gives 550,000 sq ft for the whole campus.
- BD+C's page is dated Aug. 2010 and says the campus was completed 'last September'; the page date may reflect an archive upload, so the completion year is not stated here.
- The 10-K calls it a technology and operations center and does not use the words data center; the data center itself rests on BD+C.
- No address in opened sources; coordinates approximate, at WingHaven in O'Fallon.
The full record
- Status note
- Mastercard's 2025 annual report says it owns its main technology and operations center in O'Fallon.
- Evidence
- Primary public records
- Size class
- Under 50 MW (outside main scope; kept for completeness)