SoftBank Group completed its $3.1 billion all-stock acquisition of DigitalBridge, ten months after first announcing the transaction, deepening the Japanese conglomerate's footprint in AI infrastructure.

The deal transfers a US-based digital infrastructure investor whose portfolio spans data centres, mobile towers, fibre networks and edge assets. DigitalBridge managed $10 billion in assets as of September 2025 and will continue to operate as a standalone platform under its current CEO Marc Ganzi.

What did SoftBank buy?

DigitalBridge holds the physical layer where AI workloads run. Its towers, fibre routes and data centre campuses serve hyperscalers, mobile operators and enterprises that depend on distributed compute capacity.

The investor has built exposure across the connectivity stack, with edge infrastructure complementing its core real estate holdings. That mix gives SoftBank direct access to capacity segments already running at high utilisation in major US markets, alongside international holdings that broaden the group's geographic reach.

Why does SoftBank need DigitalBridge?

SoftBank chair and CEO Masayoshi Son framed the transaction as an AI buildout. Son previously said the acquisition would bolster the group's AI abilities, pointing to a deeper presence in next-generation data centres and ambitions around superintelligence.

Owning tower and fibre assets alongside data centre exposure positions SoftBank across compute, connectivity and edge. That structure lets the group participate in multiple points of the AI supply chain rather than relying solely on model-layer bets.

What changes under SoftBank ownership?

DigitalBridge's results will appear in SoftBank's consolidated financial statements from 30 September. The unit will continue to function as a separate investment platform rather than a captive infrastructure arm within the Japanese parent.

Ganzi retains operational authority and his existing leadership team. He has predicted the tie-up will strengthen DigitalBridge's capacity to deploy capital over the long term, calling it a boost to long-term investment capabilities when the deal was first announced.

The all-stock structure means DigitalBridge shareholders received SoftBank equity rather than cash, swapping their stake in a specialist infrastructure investor for shares in a diversified technology group.

How does the deal fit SoftBank's wider strategy?

The acquisition extends a broader SoftBank AI investment programme that has previously included chip design stakes and large language model partnerships. The DigitalBridge purchase adds the underlying real estate, power agreements and fibre connectivity those systems require to operate at scale.

Son has framed superintelligence, defined as AI capability beyond current frontier models, as the long-term target. Infrastructure ownership gives the group a lever to control costs and capacity as those models demand ever-larger compute footprints.

What risks remain?

SoftBank shareholders now carry exposure to DigitalBridge's underlying asset performance, including lease renewal cycles at tower sites and power-availability constraints at data centre campuses. Consolidation accounting will weigh on reported margins in the coming quarters as the unit's results feed into group earnings.

For now, Son and Ganzi will continue to run their respective operations, with DigitalBridge's investment committee retaining autonomy over deal selection. Analysts will watch SoftBank's next quarterly filings to gauge whether the $10 billion asset base expands under the parent group's longer-dated capital.

SoftBank has signalled further infrastructure commitments as AI demand outpaces available capacity across major markets.