Hello. Thank you for holding, and welcome to Alliant Energy's First Quarter 2026 Earnings Conference Call. At this time, all lines are in a listen-only mode. Today's conference call is being recorded. I would now like to turn the call over to your host, Susan Gill, Investor Relations Manager at Alliant Energy.

Good morning, and thank you for joining Alliant Energy's First Quarter 2026 Financial Results Conference Call.

Joining me today are Lisa Barton, President and Chief Executive Officer, and Robert Durian, Executive Vice President and Chief Financial Officer. Following their prepared remarks, we will have time to take questions from the investment community. Last night, we issued a news release announcing our first quarter 2026 results and reaffirmed 2026 full-year earnings guidance. That release, along with our earnings presentation, will be referenced during today's call and is available on the investor section of our website at www.alliantenergy.com. Before we begin, please note that today's remarks and responses will include forward-looking statements. These statements are subject to risks and uncertainties that could cause actual results to differ materially. Those risks are described in last night's earnings release and interfilings with the Securities and Exchange Commission. We disclaim any obligation to update these forward-looking statements. In addition, this presentation contains references to ongoing earnings per share, which is a non-GAAP financial measure. Reconciliation to GAAP results are provided in the earnings release available on our website. At this point, I will turn the call over to Lisa.

Thank you, Sue. Good morning, everyone. I appreciate you joining us today. 2026 is off to an excellent start. First quarter, ongoing earnings delivered approximately 25% of the midpoint of our full-year guidance, despite very mild temperatures across our service territory. We remain firmly on track to achieve our 2026 earnings targets while executing on our strategic priorities. At Alliance Energy, our focus is straightforward, unlocking the potential of our customers and communities, prioritizing affordability while delivering long-term value for investors. As I have shared previously, we remain committed to driving economic development and prosperity across the states we serve. Today, I am pleased to share our progress on our two to four gigawatts of large load opportunities in april we executed a new 370 megawatt electric service agreement with a hyperscale customer in iowa with a full load ramp expected by the end of 2030. to support this growth we've entered into an agreement with a high quality counterparty to construct a simple cycle natural gas facility our third quarter Our update will include a refreshed Iowa resource plan reflecting any incremental load beyond the three gigawatts already in our plan, as well as the impact of updated MISO accreditation assumptions. We expect to finance these incremental investments with a balanced mix of equity and debt to maintain a resilient financial profile. We now have five fully executed data center agreements representing approximately 3.4 gigawatts of contracted demand, with three of these projects under active construction. Importantly, we have secured the generation resources needed to reliably serve this load, which represents now more than a 60% increase in our current peak demand. And looking ahead, we continue to make strong progress on the two to four gigawatts of future large load opportunities we first announced six months ago. Our commitment has remained consistent, creating wins for existing customers and communities, a win for new customers, and a win for our investors. We are strategically positioning our company and the states we serve for sustainable, long-term growth while keeping customer costs as low as possible. Our approach ensures we remain a trusted partner to customers and communities by delivering reliable, affordable energy solutions that support their long-term ambitions. Evidence of this strategy in action shone through last week when we joined the QTS leadership in Cedar Rapids to welcome U.S. Secretary of Energy Chris Wright and Iowa legislators to tour the site. This $10 billion development, the largest economic investment in Iowa's history, underscores our role in enabling innovation, job creation, and long-term economic diversification in the communities we serve. This is the Alliant Energy Advantage, a disciplined, solutions-oriented approach to growth. We guide data center customers to low-cost, transmission-ready sites in our service territories. And because our more recent electric service agreements are capacity-only, the investments required to serve this load are primarily energy storage and natural gas combustion turbines. This approach creates strong alignments between capital investments and revenue growth while preserving flexibility to serve future energy needs as demand for capacity and energy continues to evolve. Economic growth drives job creation, expands tax base, and strengthens communities. It also benefits customers by increasing load, which helps us maintain cost competitiveness for all customers. As electricity sales grow, we can spread fixed system costs over more kilowatt hours. In Iowa, our regulatory framework enables us to keep base electric rates stable through at least the end of the decade. That is at least four more years of no retail electric base rate reviews in Iowa. While earning our authorized return through retaining tax credits and energy margins from new generation investments. A foundational principle of utility regulation is cost responsibility. At Alliant Energy, our policy is clear. Customers driving large incremental demand are responsible for funding the infrastructure required to serve them. Through individual customer rates, large users fund transmission interconnections, system upgrades, and incremental investments. Protecting affordability for all customers. In closing, I want to thank our employees. Their dedication and solutions-oriented execution are the foundation of our operational excellence and the driving force behind the progress we continue to make. I would also like to recognize the outstanding efforts of our field teams in restoring service following recent storm activity across our service territory. Despite the heavy storm activity, we achieved strong reliability and safety statistics through the first part of 2026, which is a testament to the quality of the work by the field organization. I will now turn the call over to Robert for details on our financial results, financing plan, and regulatory activity.

Thank you, Lisa. Good morning, everyone. Yesterday, we announced solid first quarter 2026 gap and ongoing earnings of $0.87 and $0.82, respectively. As shown on slide five, our ongoing earnings year-over-year change was primarily due to higher revenue requirements and AFUDC from capital investments that are Iowa and Wisconsin utilities. These positive drivers were offset by higher operations and maintenance expenses related to new energy resources and planned maintenance at existing generating facilities, as well as higher depreciation and financing costs. Temperatures in the first quarter of 2026 reduced electric and gas margins by approximately $0.04 per share, compared to a reduction of $0.03 in the prior year. Excluding the impacts of temperatures, electric sales in the first quarter were essentially even year-over-year. First quarter ongoing earnings exclude a five-cent benefit from the remeasurement of deferred tax assets, reflecting updated state income tax apportionment assumptions driven by higher projected electric utility revenues from commercial and industrial customers, including data centers. We are reaffirming our 2026 earnings guidance, with slide six reflecting several of our key 2026 assumptions. Our longer-term earnings outlook remains intact, and based on our current plan, we expect our compound annual earnings growth rate across 2027 through 2029 to be 7% plus. We will continue to assess our long-term earnings growth potential as we execute our data center expansion and update our capital expenditure plans later this year. Turning to financing, as shown on slide seven, during the first quarter of 2026, we had parent level and Align Energy finance maturities of $1.1 billion, and we retired these maturities with available cash and new debt issuances, including a $400 million churn loan. Our remaining 2026 debt financing plans include up to $800 million of long-term issuances, consisting of up to $300 million at WPL and up to $500 million at IPL. We are continuously working to capture low-cost capital for new infrastructure investments to help lower costs for our customers and have two positive developments at IPL in the first quarter. First, we increased the capacity of our sales of the receivable program at IPL from $110 to $180 million. And second, Standard & Poor's upgraded IPL's credit rating from BBB plus to A minus. As a reminder, our four-year capital plan is funded through a balanced mix of cash flow operations, including proceeds from ongoing tax credit monetization, and new financings, including debt, I-Bet instruments, and common equity. As shown on slide 8, of the approximately $2.4 billion of expected common equity needs over the next four years, we have already raised approximately $1.3 billion through forward equity agreements. These forward equity agreements take care of planned equity needs through 2027. This leaves approximately $1 billion of remaining equity to be raised through 2029, excluding equity expected to be raised under our shared address. A new $1 billion at-the-market program was filed during the first quarter to enable issuance of this remaining equity. Our financing plan and proactive execution to date provides flexibility to support the efficient implementation of our strategy. Turning to our regulatory matters, our 2026 regulatory agenda remains closely aligned with our capital investment plans and individual rate applications for new large-load customers, numbers, as we have no active rate reviews planned in 2026, reducing regulatory uncertainty. As shown on slide 9, we recently received two constructive regulatory decisions for new wind projects at our utilities. In Iowa, the Iowa Utility Commission approved the settlement for advanced rate making principles for up to 1 gigawatt of new wind generation at a current blended ROE of 9.8%, which will be updated each year through IPL's base rate stabilization period. And in Wisconsin, we've received approval from the Public Service Commission of Wisconsin for the 153-megawatt Bentree North Wind Project. We expect these wind investments will allow our utility customers to avoid significant fuel costs and generate tax credits while supporting investment in cost-effective, responsible energy resources. Looking ahead, we currently have one active Iowa docket for a 720 megawatt natural gas combustion turbine project, which was filed earlier this week, and five active Wisconsin dockets, including the individual customer rate filing for the metadata center in Beaver Dam, and construction authority filings for LNG storage, additional wind, and increased fast decisions on these matters over the next 12 months. We expect to make additional filings throughout the year to support planned customer investments. In addition, we anticipate filing individual customer rate applications with the Iowa Utility Commission related to the second QTS data center and the recent 370 megawatt data center electric supply. I will now turn the call over to Lisa to provide closing remarks.

Lisa Walsh Thank you, Robert. Alliance Energy's consistent financial performance reflects our strategy to unlock the potential of customers and communities. This is what sets us apart and defines the Alliance Energy Advantage, being solutions-oriented, supporting growth, driving affordability for all customers, and delivering lasting value to our shareholders. Thank you for continued trust. We look forward to connecting with many of you at upcoming investor conferences. I will now turn the call back to the operator to open the line for questions.

Thank you, Ms. Barton. At this time, the company will open the call to questions from members of the investment community. If you would like to ask a question, please press star 1 on your telephone keypad. If you would like to withdraw your question, simply press star 1 again. Your first question comes from Shara Perusa with Wells Fargo. Your line is open.

Hey, guys. Good morning.

Morning, Shara.

Morning, Lisa. Just on the 370 megawatts ESA that was signed, I mean, obviously, you're calling out it provides upside to the current plan. These opportunities are starting to accrete. You have this two to four gigs out there that's very mature. Sounds like we'll get more disclosures. Are we thinking EPS disclosures, some sensitivities around the opportunities? And Lisa, do we ever get to a point where we could see a more definable EPS guidance range, given that you're already at the higher end of that 7% and visibility is improving Yeah, great question, Char.

So what we're going to do, similar to what we've said in the past, is every time we have an ESA, we will be announcing that on a quarterly basis. and our third quarter earnings call at EEI, we will be providing that full update of our resource plan, which would include providing the generation necessary to support the 370 megawatts and update on our EPS and growth trajectory. So looking forward to that call.

Got it. Got it. Okay, perfect. And then obviously there's been a lot of noise in Wisconsin between sort of local pushback and moratoriums on new data center developments. Can you just talk a little bit about, you know, where your conversations are directed with potential hyperscalers? Are they still looking at Wisconsin, or are they more focused on Iowa? I know you called out you had a lot of rural land that is zoned industrial in Iowa, so that's attractive for a data center. I just want to get a temperature gauge on where the conversations are going between the two states.

Sure. So, I mean, Iowa does, we have more landmass, if you think about it, in terms of our service territory. It's about twice the physical service territory in Iowa and very strong transmission interconnections. We still have very strong transmission interconnections and opportunities in Wisconsin as well. But as I think we've mentioned in the past, Iowa's got almost about 75% of the communities that we touch there versus 40% in Wisconsin. We are very much looking forward and awaiting a decision by the Wisconsin Public Utilities Commission with respect to our Beaver Dam facility. And, you know, there's rhetoric that's out there that I think is spillover, quite frankly, from PJM. We are actively addressing countering that. But as we mentioned in our remarks, we have our customer pledge, making sure that everybody knows that they are not paying for data centers, the cost of supporting data centers. So stay tuned on all of that, but conversations do continue in Wisconsin.

Got it. Perfect. I appreciate it, Lisa.

Congrats on the execution. your next question comes from nicolas campanella with barclays your line is open hey good morning thanks for the update morning hey so just sounds like you're going to do a 370 megawatt simple cycle for this build um for the esa that you just signed so just what's the right kind of dollar per kilowatt cost that you're seeing for those types of investments right now Sure.

So as we mentioned, we ventured into an agreement with a high-quality counterparty there to build it. We will be updating on the size of that. That unit will be sized according to our resource plan. And similar to what we've done in the past in Iowa, we're using a low, medium, and high logo trajectory.

Obviously, we continue to have discussions with hyperscalers and we'll be refreshing all of that at EEI we cannot disclose the cost due to confidentiality agreements but you can expect those to be in line with what you're seeing in the marketplace today okay okay and then you know it seems like you're definitely having success in working with the current customer base and you have visibility on the two to four gigs you signed another 370 today you know you you mentioned that each time you'll have an esa you'll announce those on a quarter basis so this is kind of like the run rate that we should kind of expect as we get to the second quarter and maybe you could kind of talk a little bit about of like the two to four gigs the how many customers are in there like could we see a one gigawatt deal when you do the next one for instance or should we continue to kind of see you put up these, you know, three to 500 megawatt call it deals. Thanks.

Yeah. So, you know, there really is no one specific answer to any of that. These represent conversations with all different size entities. I mean, what I can say about the two to four is remember, we hold ourselves to a very high standard. These are mature opportunities where we have a, you know, a higher level of confidence than may be out there we have made sure that they've got land control they are in active discussions with our team the transmission studies are either ongoing or complete we make sure that we have a firm understanding of the load ramp and that they have a firm understanding of the load ramp and that we've got the line of sight with respect to the timing of the transmission and upgrades and the generation. So, you know, that can take a little bit of time, but, you know, they really come in small, medium, and large, quite frankly, sizes.

Could I just ask one follow-up just on the 370? Is that something as it ramps into 2030 that could be increased and you can put that customer and do more of, and does that represent part of this two to four?

I'm just trying to – or is the 370 largely just locked and loaded today and that's a – well we're not going to talk really specifically about the 370 as you know we have confidentiality agreements in place for all of this uh i would just point you back to we've got these mature opportunities with a higher level of confidence in these and you know the two to four is in essence made up of uh new entities as well as you know entities you know that that might want to further expand okay thanks for the updates i really appreciate it thank you you're welcome your next question comes from paul zimbardo with jeffries your line is open hi good morning team thank you thank you and and just to follow quick on my my friend nick's question just for the 370 megawatts is there land and kind of zoning capability for that customer to expand if they so choose to in the future or is that more a constrained site so you know any of that information is really theirs to share rather than ours to share but what I can say is we are talking about Iowa what we have mentioned in the past I mean we've got great access to transmission we are not in other than Cedar Rapids really large population areas so you can make your assumptions as you wish.

Okay. Okay. And just going to more generically, even kind of for a demand of that size kind of with the reserve margin and kind of accreditation, just how much resources in terms of megawatts would you need to support that?

Well, that's why we're so thrilled to have that really flexible resource planning process that we have in both states. And we really see that us a strategic advantage to Alliance Energy. So what we will be doing this later on this year, basically filing a resource plan. It will take into account what we need in terms of reserve margins. It'll take into account any capacity that we need with respect to changes in the MISO accreditation process. It'll also take into account any generation needed to support additional ESAs that we may announce between now and the end of the year. So it really puts us in a very good position to be flexible and to grow at the pace of our customers, because quite frankly, that's what we have said from the very beginning. We need to make sure we've got a win-win-win, win for new customers, win for existing customers, win for investors. And that's foundational to our ability to grow at their pace.

Absolutely. That makes a lot of sense. And if I could sneak in one unrelated. Just checking, is there any update on the timeline for the FERC policy for those self-funded network interconnection upgrades? And I just assume the opportunity set for yourself would be larger, assuming that goes in one direction, just given how much new generation has been added. But just curious on the timeline there, if you have one. Thank you.

We are anxiously waiting, as are you, but no, no, I have a line of sight on that.

Okay. Okay. Thank you very much, team.

Thank you.

Your next question comes from Bill Apicelli with UBS. Your line is open.

Good morning, Bill.

Just a question. You've mentioned a couple of times, but the MISO accreditation assumption impact, I know they're shifting to this direct loss of load framework over time here, but how does that maybe differ from what your base plan assumes? or I would assume that there's sort of, you know, the net capacity value of the installed base would be somewhat less, and so does that require more generation? Or maybe you can just sort of speak through what the potential implications are of the accreditation assumptions?

So we take this into account in terms of all of our modeling. You know, we're certainly in a dynamic time where there's a lot of growth. So, you know, our modeling assumptions are going to have, you know, basically our load assumptions, how that's changing, what we need from a reliability standpoint, what do we need to serve other customers, any environmental changes, and so forth.

MISO is still working on some of that, and so we'll have a cleaner line of sight as we get closer to Q3. okay and then um the other question here is just um on the generation you sort of i know we're getting and trying to get in front of what you're going to up to in q3 but the the resource mix that you see um i mean is it really a sort of a full boat of you know uh capacity fixes in terms of storage and peakers or is it could be you know a mix is that going to include baseload potentially as well, or is it more around shaving the peaks and having the capacity resources there to satisfy the MISO requirements?

It's primarily batteries and peakers. Recall that we have focused on simple cycles that allows us to basically invest later in these facilities should we need the energy resources. As you may recall, Iowa in particular is very steep in wind resources that provides a lot of energy. And what we like about this solution is both batteries and your simple cycles allow us to really capture that speed to market. We're very fortunate to be in this region where we've got so many wind resources. That's very location-specific. Not everybody can do that.

Right. And then just lastly, the CT you referenced today, what's the size of that? Is that, you know, roughly the size of the load, or would I assume there be some reserve margin to that?

Yeah, so when it basically, you know, 1.1 megawatts.

Oh, okay. So the CT you're talking about today is 1,100 megawatts.

Up to.

Up to. Okay. All right. Helpful. Thank you.

Your next question comes from Paul Fremont with Leidenberg. Your line is open.

Great. Congratulations on a great quarter. In terms of the two to four gigawatts, can you give us a sense of how many potential developers are represented in that two to four?

No, all we can say really is that they are, you know, very high quality counterparties. Remember the threshold that we have when we talk about the two to four is that we have active negotiations in place. We've got transmission studies that are either completed or ongoing and land control. So, you know, think of it as a combination of hyperscalers as well as developers.

Great. And is all of the two to four in Iowa?

No, it's not.

And can you give us like any type of a distributional breakout of what would be Wisconsin versus Iowa?

You know, it's really fluid, Paul, so we can't. It's It's one of these things where it's always a moving target.

Great. And then you've given us sort of aggregate rate base. Is it fair to think about year-end 25 rate base as being sort of 6 billion Wisconsin and 11 billion Iowa?

Yeah, we provided that information in the slide that we've disclosed publicly, Paul. So you should be able to see that information.

Okay, because, I mean, you also provide like an aggregate 12% growth rate in rate-based, but the level of investment is obviously heavily skewed to Iowa. So is it possible to get a sense of how fast rate-based is going in Iowa standalone and Wisconsin standalone?

Yeah, we've also provided additional information and some of our supplemental information that we've shared publicly that's got the details uh we'll have susan follow up with you to share that information and point you to the right direction there great and then the last question for me the five to seven percent eps growth um what should we use as the base for that seven percent plus yeah we update it every year once we complete the year so you can use the 25 uh final number that we accomplished there and then we'll just keep on updating that each year after we complete the year.

So it's 25 actual. Thanks.

The next question comes from Andrew Waisel with Scotiabank. Your line is open.

Hey, Andrew.

Hi, good morning. Different question on the new CT. Are you able to share the service date? Would it be online by the end of 2030 to match the new ESA?

31.

Thank you. And then, wow, 1.1 gigawatt for a new CT seems quite large. You also reminded us that you have the 720 megawatt CT going through the approval process. My question is, help us understand the thinking behind pursuing simple cycles as opposed to bigger baseload CCGTs with higher run times, especially you've had such a, you know, fast growth in demand and you've got the two to four gigawatts that are potentially coming next. Is it a question of speed or cost? And then longer term for these assets, Could they be converted to CCGTs if demand justifies it? And would the hyperscalers pay for those upgrades?

Yeah, great question. So, you know, we are always, you know, very focused on, you know, certainly customer affordability and flexibility and making sure that we can move at the pace of our customers. And so what we have found is that these data center customers, these hyperscalers are very much interested in speed to market. And because of the very wind-rich area in which we operate, you know, just kind of that reminder in Iowa, there's about 6 gigawatts worth of load today between Mid-American and Alliant, and about 15 gigawatts of wind. So it pretty much means your energy is coming from wind, and so that's something that we can take advantage of. That's why batteries and simple cycles work really well for us. And what it also does is it allows us to, you know, when that energy market changes, when these data centers are interested in having that provided by us, we can also add, you know, basically the steam turbine to have the simple cycles converted into combined cycles. You know, one data point that I just want to mention on the 1.1, basically, you know, we've entered into a contract for up to the 1.1. That allows us to be very flexible. You're going to see all of those details in the ADEI third quarter earnings call where it reflects everything in our resource plan. Remember that very flexible resource planning process allows us to take into consideration a lot of different moving parts. We have a slice of system approach. So we're not building one plant for a data center. It's a slice of system. And so we're thinking about all of the needs that we have from an investment standpoint.

Okay. That's very helpful. So if the two to four gigawatts were to come to fruition, should we expect more CTs for capacity? And that would be more likely than CCGTs?

Yes. Yes. CTs, batteries. I mean, we've always had an all of the above. approach with respect to generation that's all a part of that resource planning process and again as I mentioned earlier we're basically tying it with you know low medium and high low growth opportunities right so that allows us to basically be very flexible in our process all of the above except CCGT sorry teasing just couldn't help myself thank you very much appreciate the help there again if you have a question it is star one on your telephone keypad your next question comes from steve dambresi with rbc capital markets your line is open

hi lisa and robert thanks very much for taking hey good morning thanks for taking my question um i just had a quick one you know when i look at slide four and it talks about the two to four gigawatts of upside load and the 370 megawatts that you just added in can you talk a little bit about what that does in iowa for your ability to potentially stay out longer than the five years you've agreed to, because, you know, when we look at our numbers, you know, we think it's just even in the base plan before adding these 370 megawatts, you were probably, you know, pretty, pretty able to keep rates flat and potentially provide benefits to customers. And so just want to hear how that kind of continues to shape up as you add more load and we go into the middle of the next decade.

So great question, Stephen. Yeah, that planning is very dynamic right now given the volume of kind of data center interest that we have right now and the changes we've seen, but think of it as incrementally it's going to be beneficial. When we go through the process of contracting these data center loads as well as the new generation needed to support it, we're always focused on ensuring that we capture some level of margin such that we'll be able to share back with the rest of the customers. the differential between the revenue stream from those data centers and the costs related to the generation. And so think of it as incrementally better, but we're not in a position right now to give you any kind of definitive timeframe as far as what that might do to the current stay out.

Steve, the one thing that I would add is that this is where the load ramp is also very critical in our ability to navigate that. again why we're really focusing on how do we how do we uh position ourselves to make sure we can move as quickly as possible okay that makes sense and then just on the cts uh or the potential ct you know you talked about 31 but you and you talked about speed to construction can you just give a flavor if like a ccgt takes four years to build like what's a typical ct build time It's about three to four years.

Thanks very much. Appreciate it. That's all I had.

Your next question comes from, my apologies, Ms. Gill. There are no further questions at this time.

With no more questions, this concludes our call. A replay will be available on our investor website. We thank you for your continued support of Alliant Energy and feel free to contact me with any follow-up questions.

This concludes today's conference call. Thank you for joining. You may now disconnect.