X0508 4 2026-03-11 0001101239 EQUINIX INC EQIX 0001795624 Fox-Martin Adaire C/O EQUINIX, INC. ONE LAGOON DRIVE REDWOOD CITY CA 94065 1 1 CEO and President 1 Common Stock 2026-03-11 4 M 0 2034 0 A 20659.661 D Common Stock 2026-03-12 4 S 0 40 958.14 D 20619.661 D Common Stock 2026-03-12 4 S 0 80 960.18 D 20539.661 D Common Stock 2026-03-12 4 S 0 40 961.19 D 20499.661 D Common Stock 2026-03-12 4 S 0 120 962.5533 D 20379.661 D Common Stock 2026-03-12 4 S 0 80 964.04 D 20299.661 D Common Stock 2026-03-12 4 S 0 515 968.1205 D 19784.661 D Common Stock 2026-03-12 4 S 0 170 968.9965 D 19614.661 D Common Stock 2026-03-12 4 S 0 41 969.9178 D 19573.661 D Restricted Stock Unit 0 2026-03-11 4 A 0 2034 0 A Common Stock 2034 2034 D Restricted Stock Unit 0 2026-03-11 4 M 0 2034 0 D Common Stock 2034 0 D Shares were sold pursuant to a 10b5-1 Trading Plan in order to raise funds to pay the required withholding tax pursuant to the vesting of RSUs. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $962.23 to $962.87, inclusive. The reporting person undertakes to provide to Equinix, Inc, any security holder of Equinix Inc, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes 3 through 6 to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $963.61 to $964.47 inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $967.66 to $968.63 inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $968.72 to $969.51 inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $969.83 to $969.92 inclusive. Under the 2025 Annual Incentive Plan, subject to meeting performance criteria, the reporting person was eligible to receive a bonus to be paid in the form of fully-vested restricted stock units. The Compensation Committee has determined that the performance criteria were attained, and therefore 100% of the award was granted on March 11, 2026 as reported in this Form 4. Restricted stock unit award expires upon reporting person's termination of service. /s/ Samantha Lagocki, POA 2026-03-13