(Reuters) -The world's largest technology companies are tapping debt markets, raising almost $100 billion through recent bond offerings, as they seek to bolster their artificial intelligence infrastructure.

This marks a shift for Silicon Valley firms that typically relied on cash to fund their investments.

Tech giants, including Amazon ( AMZN ), Microsoft ( MSFT ), Google, Oracle, and Meta, are set to nearly double last year's investment by spending $400 billion on data centers despite mounting fears of an AI bubble. Alphabet CEO Sundar Pichai has warned that no company will escape the fallout if the boom collapses.

Deutsche Bank estimates that global AI-related investment could reach $4 trillion by 2030, reflecting investors' insatiable appetite to commercialize a technology that surged in popularity three years after ChatGPT's debut.

AMAZON ( AMZN )

On November 17, Amazon ( AMZN ) said it plans to raise $15 billion through its first U.S. dollar bond sale in three years.

The six-part offering drew $80 billion in demand, according to Bloomberg News. 

Particulars Value

Debt outstanding $69.29 billion

Cash and cash $66.92 billion

equivalents

Next bond $1.25 billion due on

payment December 1 2025

ORACLE

In September, Oracle filed to raise about $18 billion in debt in a six-part offering to fund AI infrastructure, following billions already invested this year.

Particulars Value

Debt outstanding $101.25 billion

Cash and cash $10.45 billion

equivalents

Next bond $2.75 billion due on March

payment 25 2026

VERIZON

On November 12, Verizon filed to raise about $11 billion in the corporate bond market to help fund its $20 billion acquisition of Frontier Communications.

Particulars Value

Debt outstanding $139.62 billion

Cash and cash $7.71 billion

equivalents

Next bond $205.66 million due on March

payment 20, 2026

ALPHABET

On November 3, Google-parent Alphabet filed to raise $17.50 billion in debt in the U.S., and 6.5 billion euros ($7.49 billion) in Europe, for general corporate purposes, including the payment of outstanding debt, the company said.

Particulars Value

Debt $48.78 billion

outstanding

Cash balance $23.09 billion

Next bond $2 billion due on August

payment 15, 2026

META PLATFORMS ( META )

On October 30, Meta Platforms ( META ) filed for its largest bond offering ever, up to $30 billion, to finance a costly AI infrastructure expansion.

The Facebook-parent has been navigating significant cost pressures from AI investments, with capital expenditure expected to be "notably larger" next year.

Meta recently secured a $27 billion private capital deal for its "Hyperion" data center and is aggressively hiring AI talent, contributing to increased compensation costs.

Particulars Value

Debt outstanding $59 billion 

Cash balance $10.19 billion

Next bond $2.66 billion due on August

payment 15 2027

SOURCE: Data compiled by LSEG; SEC filings

($1 = 0.8679 euros)