100% Renewable Energy Vision and GreenAdvantage® Program Update MidAmerican Energy Company Overview

• Headquartered in Des Moines,

• 3,400 employees

• 1.6 million electric and natural gas customers in four Midwestern states

(1) • 11,188 MW of owned capacity

• Owned capacity by fuel type: (1) 12/31/19 12/31/00 – Wind(2) 57% 0% – Coal 25% 70% – Natural gas 12% 19% – Nuclear and other 6% 11%

(1) Net MW owned in operation and under construction as of December 31, 2019 (2) All or some of the renewable energy attributes associated with generation from these generating facilities may be: (a) used in future years to comply with renewable portfolio standards or other regulatory requirements or (b) sold to third parties in the form of renewable energy credits or other environmental commodities

2 Our Vision and Dream

3 100% Renewable Energy Vision

• MidAmerican Energy began investing in renewable energy in 2004 • Vision to provide 100% renewable energy for our customers • Launched GreenAdvantage program in 2017 to share benefits with customers • Transition to renewable energy provides many benefits to communities and customers including – affordable rates – economic growth – job creation • Sustainable future

4 Wind Energy in the U.S.

• 41 of 50 states have utility scale wind projects

5 6 Iowa’s Leadership in Renewables

MidAmerican Energy’s rates are 12 th lowest

in the nation Wind generation has been added at while its offering of no net cost to MidAmerican Energy’s renewables is on track customers to reach 100%

7 Owned Renewable Generation

8 Wind Resources

• Transmission line access and available capacity • Willing landowner participation • County regulations – Iowa tax abatement adopted by the county – Conducive zoning and permitting regulations • Project Studies – Environmental – Federal Aviation Administration – Geotechnical – Sound and shadow – Communications

9 Wind Resources

10 Wind Quick Facts

• in Iowa serves more than 2.4 million households • MidAmerican Energy owns 5.9% of total U.S. wind capacity • Each foundation requires approximately 430 cubic yard of concrete (delivered by 43 full cement trucks) • The tip of the blade can spin as fast as 200 mph • Each wind turbine requires 10 semi-trucks to deliver the turbine’s major components • First MidAmerican Energy turbine installed in 2004 • Tip height of 330 feet and a blade length of 113 feet • 2019: turbines had a tip height of 590 feet and a blade length of 242 feet

11 Evolution of Wind Technology

50%

45% 108m 150m 145m

40% 110m

108m 116m 35% 101m 93m 77m 30% 115m 107.5m 71m 105m 25% 95m 61m 80m 80m 80m 80m 80m 20% 65m 15% 60m

10%

5%

0% GE Mitsubishi GE Siemens Siemens Siemens Siemens GE Vestas Siemens 1.5MW S-type 1.0MW 1000A 1.5MW SLE-type SWT-2.3-93 SWT-2.3-101 SWT-2.346-108 SWT-2.415-108 - 2.3-116 V110-2.0MW V150-4.2MW Gamesa 4.8-145 Concrete 2004 2005 2006 2008 2011 2012 2015 2016 2017 2019 2020

12 13 GreenAdvantage® Renewable Percentage

61.3%

50.8% 51.4% 47.0%

38.0%

28.0%

6.1%

2013 2014 2015 2016 2017 2018 2019 Actual Actual Actual Actual Actual Actual Actual

14 The Impact of Investing in Wind

• MidAmerican Energy owns 5.9% of total U.S. wind capacity

• 2020 – 7,082.8 MW of wind capacity from 3,341 turbines at an investment of $12.9 billion

• 32 projects in 28 Iowa counties

• Thousands of temporary construction jobs created

• 300 permanent jobs created

• All completed while rates are approximately 31% below the national average

15 Benefits Within Iowa

• Approximately 10,000 direct and indirect jobs supported in Iowa • $19 billion in total capital investment in Iowa through 2019

• $68.7 million in annual lease payments

• To more than 3,000 landowners

• New tax revenue source to cities, counties, schools, hospitals and other eligible recipients

• Customers able to claim a verified renewable energy amount to reach sustainability goals

16 Your GreenAdvantage ®

• Customer demand for renewable energy is growing… MidAmerican is delivering! • Structure marketing and attraction efforts to include renewable energy as built in value – Maximize your partnership with MidAmerican Energy – Enhance communications strategies and incentive packages to elevate your community’s position in attracting new business • Business Retention and Expansion activity – Key benefits of doing business with MidAmerican Energy; capitalize on affordable rates and reach renewable energy goals – Tailored approach to meet customer needs • Sustainability – Investing in the future of MidAmerican Energy and sharing the benefits with our customers and communities

17 GreenAdvantage ® Resources

• Verification letter

• Plaque with trigon

• Renewable energy video at www.midamericanenergy.com/100-percent-vision

• Energy Source (how companies put GA to work) – GA video https://www.midamericanenergy.com/green-advantage

• Window clings

• Coming Soon: Social media tool kit (verify if this is an option)

• Send us your ideas!

18 GreenAdvantage®

19