Editas Medicine, Inc. (NASDAQ:EDIT) Q1 2023 Earnings Call Transcript

Page 2 of 10

Samantha Semenkow: And then when you’re making that cutoff for those incremental additional two patients, what level of follow-up was the cut-off there? So I’m just curious, is it a couple of months, is it one month? Any information you can provide would be helpful.

Baisong Mei: Yes. We are — for these next two patients, we’ll have two months or more.

Gilmore O’Neill: Just a follow-up, one other thing, I think it’s important to understand that, obviously, we will, because the abstract, which will be published later, was based on data cut earlier, we will actually be presenting more data than in the abstract at the EHA Congress.

Baisong Mei: Yes. Thanks, Gilmore. And just kind of also follow-up on that, the abstract will be available on May 11th.

Operator: Next question is from Dae Gon Ha with Stifel.

Dae Gon Ha: Hey, great. Thanks so much for taking the question. And look forward to the data update next month. So, I guess, I was just kind of wondering about your strategy going forward. So, maybe if you can kind of walk us through how you’re thinking about next programs or priorities beyond EDIT-301? I think, Gilmore, you mentioned in vivo HSC editing. But curious, is delivery tech or less burdensome conditioning a stronger emphasis in your lineup, or is it advancing new programs? And if it’s the latter, I guess, would you continue to do other ex vivo HSC, or is it more of an in vivo? And in that case, would you also think about other organs? Then I’ve got a follow-up.

Gilmore O’Neill: Yes. Thanks very much, Dae Gon. We are — the large part of our discovery focus is actually on in vivo. I think that was a very important part and pivot of our strategy because we believe that it maximizes the — or maximizes our ability to exploit the powerful technology that we have available to us. From a point of HSCs, if you reduce the problem of in vivo to sort of three elements, selecting a robust effector molecule or enzyme, CRISPR enzyme, selecting a good target and then delivery, we believe that we have solved two of those problems, with very robust human data in the use of our Cas12a, CRISPR enzyme and the target of that specific HBG1/2 promoter. And so that reduces it to an in vivo delivery problem.

As I said in my earlier remarks, our discovery group is actually working on that, and we look forward to updating more at an appropriate time in the future. I will say that we are looking actually also beyond HSCs to other tissues. And again, we’ll give further updates in the future.

Dae Gon Ha: And then second question, I just wanted to follow up on Baisong’s commentary during prepared remarks. So, as you were going into the field and kind of gauging physicians’ take on EDIT-301, you expressed — or you commented on their high enthusiasm. Wondering if you could comment, I guess, what proportion of those docs you visited are also looking to administer CTX001? And I guess, has there been any kind of gauge or ascertainment from your part as to what their sort of motivation would be in taking CTX001? Like, are they lining up patients right now for CTX001? What kind of sentiment do you have? Are there any reservations on that approach? Any thoughts on that would be helpful. Thanks so much.

Baisong Mei: Yes. Thanks for the question. Yes, I visited quite a few number of study sites. Actually, many of them are being — participating in the previous gene editing trials. So, they are very enthusiastic about the approach we are taking, including the different targeting region for editing and the different enzymes to do. And so, actually, the benefit for us is those investigators have a lot of experience in this field.

Page 2 of 10