WIXLIB

Appendix C: Green Building Projects11 Loyang Close, Jurong, SingaporeAdditional Information Provided by ManagementBCA Green Mark PerformanceGreen Mark for New Data Centre V2019/V213%Energy46%Savings(1)Water SavingsCertification awarded March 2020Platinum70.8Energy Efficiency43.8Water EfficiencySustainable Construction & Management 1.29Design PUE40.5 MW-IT5-Story Urban Data Center7.014.5Smart and Healthy Building4.0Advanced Green Effort1.5This newly-constructed data center is one of the first to beawarded BCA Green Mark for New Data Centre V2019/V2,Platinum certification. The facility has a design PowerUsage Effectiveness (“PUE”) of 1.291, a notable level ofperformance in a tropical climate. This is expected totranslate to energy savings of 79,800 MWh per year once atfull operation.The data center’s design also utilizes high efficiency singlemodule UPS systems with N 1 distributed redundancy tominimize redundant equipment. The UPS system usesadvanced lithium-ion batteries that are more power dense,lighter, and have 3X the operational service life compared totraditional VRLA2 batteries.The facility uses turbine generators that operate with loweremissions than reciprocating diesel generators due to morecomplete fuel combustion and higher mechanical efficiency.The project is also planning for a green future, with a solarready roof designed for easy installation.1. Compared to a baseline design at 100% load.2. VRLA Valve Regulated Lead AcidDIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 9

Appendix C: Green Building Projects21744 Sir Timothy Drive, Ashburn, VirginiaAdditional Information Provided by ManagementLEED Performance35%16%Construction MaterialSourced RegionallyEnergy Savingsvs. BaselineFor LEED Core and Shell (v2009)Certification awarded May 2019GoldSustainable sitesWater efficiency34%Potable WaterSavingsEnergy & atmosphereENERGY STAR Certified2019, 2020619/282/1029/37Material & resource7/13Indoor environmental quality7/12Innovation6/6Regional priority credits1/421744 Sir Timothy Drive encompasses 289,000 square feeton a campus in Ashburn, Virginia. Both data centers on thecampus have received LEED certification and have gone onto earn ENERGY STAR certification. In 2020, 21744 SirTimothy Drive achieved an exemplary ENERGY STARscore of 99 out of a possible 100.The data center is a leading energy efficient data center, asevidenced by its strong ENERGY STAR score. The datacenter utilizes an energy-efficient spinning massuninterruptible power system that does not rely on batteriesto provide temporary power in the event of a power gridoutage.The facility is supplied with municipal non-potable waterwhich reduces associated potable water demand by morethan 90%. In 2019 alone, the facility avoided the use of 37million gallons of potable water.The construction of the facility supported an estimated1,648 construction jobs and 153 full-time jobs.DIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 10

Appendix C: Green Building Projects44751 Round Table Plaza, Ashburn, VirginiaAdditional Information Provided by ManagementLEED Performance40%96%Potable WaterSavingsConstructionWaste DivertedFor LEED Core and Shell (v2009)Certification awarded May 2019GoldSustainable sitesWater efficiency100%Mercury-FreeLED LightingEnergy & atmosphereEV ChargingStations44751 Round Table Plaza, referred to as Building P, is a773,000 square foot, two-story LEED-Silver certified datacenter that was designed and constructed to be highlyenergy efficient and water-wise.6116/286/1017/37Material & resource6/13Indoor environmental quality8/12Innovation6/6Regional priority credits2/4The data center uses a cooling system that takesadvantage of energy-efficient free-air economization forlarge portions of the year. This system is highly modularand scalable which allows the data center to operate at highlevels of efficiency even when partially occupied. Thebuilding does not use water for cooling, an advantage in anarea experiencing high growth. The site utilizes municipalnon-potable water for landscape irrigation needs to reducedemand on potable water supplies.Lighting systems are high efficiency LED throughout thefacility, both interior and exterior. The data center useshealthy materials that support good indoor environmentalquality for building occupants, and the facility has carbondioxide sensors that monitor indoor CO2 concentrationsand adjust ventilation rates to ensure a healthy workplace.DIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 11

Appendix DEnergy Efficiency ProjectsAdditional Information Provided by ManagementData centers consume energy 24-7, and this energy isconsumed predominantly by customer IT equipment (computerservers, networking gear, and related equipment), followed byairflow and cooling systems that support reliable operation ofthe data center. Digital Realty’s operational efficiency initiativestarget cooling, airflow, and lighting systems to drive downoverall energy use, while supporting customer efforts tooptimize efficiency across their own IT equipment.Digital Realty’s Infrastructure Upgrade Energy ManagementProgram (EMP) supports energy and water conservationthrough implementation of best practices, operationalimprovements, retro-commissioning, and capital equipmentupgrades across the data center portfolio. This programsupports the identification, analysis, and implementation ofenergy-saving projects, part of an annual InfrastructureUpgrade investment program at operational data center sites.Digital Realty is a signatory to the European Union’s Code ofConduct for Energy Efficiency in Data Centers, a participant inthe U.S. Department of Energy Better Buildings Challenge, andhas received ENERGY STAR certification for 70% of its U.S.stabilized and managed portfolio by IT kW, more than any otherdata center provider.ENERGY STAR-certified data centers perform more efficientlythan 89 percent of data centers based on the EPA benchmark.Energy Efficiency Projects Summary 5 projects selected from the infrastructure upgrade energymanagement program portfolio for inclusion during theeligible period 2,079 MWh annualized energy savings; 9,539 MWhcumulative energy savings during the eligible period and21,586 MWh during the expected lifetime of theimprovements(2) 16% weighted average energy savings compared tobaseline energy usage Annual energy savings are comparable to the electricityneeds of 249 U.S. homes for a year(3) Example project types include: Replacing end-of-life UPSsystems with more efficient products, airflow optimizationand retrocommissioning in data halls, and LED lightingupgradesDigital Realty’s 31 ENERGY STAR-certified data centers areestimated to eliminate 678,000 metric tons of CO2 emissionsand save 959,000 megawatt hours annually relative to industryaverage data centers, enough electricity to power 115,000average U.S. homes for a year. Furthermore, Digital ergy.gov/partners/digital-realty-trustSee Appendix A for definition of eligible period. The expected lifetime of certain improvements may exceed the eligible period.Estimated based on U.S. EPA Greenhouse gas equivalency factorsDIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 12

Appendix EEligible Period Definitions and Green Building StandardsAdditional Information Provided by ManagementELIGIBLE PROJECTS & ELIGIBLE PERIOD DEFINITIONSCategoryEligible ProjectsAdditional NotesGreen buildingsSelected projects receivinggreen building certification fromJanuary 1, 2018 to December31, 2020Total development costsexcluding land. CumulativeImpacts (Appendix B) arecalculated from the date ofcertification through the term ofthe bond.Energy efficiencySelected projects completedfrom January 1, 2019 toDecember 31, 2020Cumulative Impacts (AppendixB) are calculated from the dateof project completion throughthe term of the bond or the endof the equipment useful life,whichever is shorter.20182019202020212022202320242025GREEN BUILDING STANDARDS(1)Leadership in Energy and Environmental Design (“LEED”) is avoluntary, third party building certification process developed by theU.S. Green Building Council (“USGBC”), a non-profit organization.The USGBC developed the LEED certification process to (i)evaluate the environmental performance from a whole-buildingperspective over a building’s life cycle, (ii) provide a definitivestandard for what constitutes a “green building,” (iii) enhanceenvironmental awareness among architects and buildingcontractors, and (iv) encourage the design and construction ofenergy-efficient, water-conserving buildings that use sustainable orgreen resources and materials.Building Research Establishment Environmental AssessmentMethodology (“BREEAM”) is a voluntary third-party buildingcertification process developed in 1990 by the U.K. BuildingResearch Establishment (“BRE”). BREEAM is one of the world’sleading environmental assessment method and rating systems forbuildings that sets standards for best practice in sustainablebuilding design, construction and operation. A BREEAMassessment uses recognized measures of performance set againstestablished benchmarks for (i) energy, (ii) water, (iii) the internalenvironment, (iv) pollution, (v) transport, (vi) materials, (vii) waste,(viii) ecology and (ix) management processes. 645 MMEnergy EfficiencyGreen Buildings1.BCA Green Mark is a voluntary green building assessment andcertification system developed in 2005 by the Building andConstruction Authority (“BCA”), an agency under the Ministry ofNational Development in Singapore, to support more environmentfriendly buildings. The BCA Green Mark certification processassesses environmental impacts related to (i) energy, (ii) water, (iii)environmental impact, and (iv) indoor environment quality.Refer also to the Listing ParticularsDIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 13

Appendix FData TablesAdditional Information Provided by ManagementCUMULATIVE IMPACTS DURING ELIGIBLE PERIOD(1)ANNUALIZED IMPACTSGreen BuildingsEnergy 297,0452,079299,12418,879,362-18,879,362Potable Water Savings59%-Total Water Savings55%-Construction WasteDiversion Rate93%-Green BuildingsEnergy 6,531Number of ProjectsCO2 Savings(MTCO2e)(2)Renewable energy(MWh)Energy Savings (MWh)Water Savings(gallons)Employment Impacts(jobs)5,567 Construction518 Permanent(3)38 Construction0 Permanent(4)CO2 Savings(MTCO2e)(2)Renewable energy(MWh)Energy Savings (MWh)Water Savings (gal)Allocation of Net Proceeds5,605 Construction518 PermanentProjects were selected based on the eligibility criteria identified in Digital Realty’s Green BondFramework. Allocation of the net proceeds from the January 17, 2020 issuance of 0.625%Guaranteed Notes due 2025, from the Green Bond Listing Particulars dated January 16, 2020,included in the Green Bond Allocation Statement, through December 31, 2020, were allocated toEligible Green Projects as set forth below, in accordance with the criteria set forth in Appendix A.Certain Eligible Green Projects may receive allocations from more than one green bond. This is donein a manner that ensures that there is no ‘double counting’ of eligible spend. Allocated values matchthe net proceeds of the 0.625% Guaranteed Notes due 2025, yielding a full allocation of the netproceeds as described in this Green Bond Allocation Statement.Exchange RatesThe exchange rate was determined based on the date of the issuance on January 17, 2020. Thisexchange rate value was subsequently applied to all projects not already denominated in Euros.1. See Appendix A for definition of eligible period.2. Estimated based on U.S. EPA Greenhouse gas equivalency factors3. Calculation is based on the total eligible investment allocated to the bond. Jobs data: https://www.uschamber.com/sites/default/files/ctec datacenterrpt lowres.pdf4. Jobs data: -opportunity.pdfDIGITAL REALTY GREEN BOND ALLOCATION STATEMENT 2021 14

sustainability program initiatives and project performance, economic, and social impacts. We believe our commitment to sustainability and our use of green bonds will encourage others in our industry to advance their own environmental commitments. In 2020 Digital Realty issued Euro-denominated green bonds, aligned with Digital Realty's Green Bond