# EDGAR Filing Document

**Accession Number:** 0001650664
**File Stem:** 0001650664-25-000156
**Filing Date:** 2025-11
**Character Count:** 158308
**Document Hash:** 47512a927eaa1475fe4d247549d1f45f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001650664-25-000156.hdr.sgml**: 20251110

**ACCESSION NUMBER**: 0001650664-25-000156

**CONFORMED SUBMISSION TYPE**: 10-Q

**PUBLIC DOCUMENT COUNT**: 71

**CONFORMED PERIOD OF REPORT**: 20250930

**FILED AS OF DATE**: 20251110

**DATE AS OF CHANGE**: 20251110

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Editas Medicine, Inc.
- **CENTRAL INDEX KEY:** 0001650664
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 464097528
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-Q
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37687
- **FILM NUMBER:** 251466136

**BUSINESS ADDRESS:**
- **STREET 1:** 11 HURLEY ST.
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02141
- **BUSINESS PHONE:** 617-401-9000

**MAIL ADDRESS:**
- **STREET 1:** 11 HURLEY ST.
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02141

?xml version='1.0' encoding='ASCII'? edit-20250930

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

_______________________________

**FORM 10-Q**

_______________________________

**(Mark One)**

**☒** **QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the quarterly period ended September 30, 2025**

**OR**

**☐** **TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

**For the transition period from ____________ to ________**

**Commission File Number 001-37687**

_______________________________

**EDITAS MEDICINE, INC.**

**(Exact name of registrant as specified in its charter)**

_______________________________

---

| | |
|:---|:---|
| **Delaware**<br>**(State or other jurisdiction of**<br>**incorporation or organization)** | **46-4097528**<br>**(I.R.S. Employer**<br>**Identification No.)** |
| **11 Hurley Street**<br>**Cambridge, Massachusetts**<br>**(Address of principal executive offices)** | **02141**<br>**(Zip Code)** |

---

**(617) 401-9000**

**(Registrant's telephone number, including area code)**

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock, $0.0001 par value per share | EDIT | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☐ | Accelerated filer | ☐ |
| Non-accelerated filer | ☒ | Smaller reporting company | ☒ |
| | | Emerging growth company | ☐ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

The number of shares of Common Stock outstanding as of October 31, 2025 was 97,618,660.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**TABLE OF CONTENTS**

---

| | | |
|:---|:---|:---|
| | | **Page** |
| **<u>[PART I. FINANCIAL INFORMATION](#if0cf22f484b84387b6b961dcf6091bed_10)</u>** | **<u>[PART I. FINANCIAL INFORMATION](#if0cf22f484b84387b6b961dcf6091bed_10)</u>** | [3](#if0cf22f484b84387b6b961dcf6091bed_10) |
| <u>[Item 1.](#if0cf22f484b84387b6b961dcf6091bed_13)</u> | <u>[Financial Statements (unaudited)](#if0cf22f484b84387b6b961dcf6091bed_13)</u> | [3](#if0cf22f484b84387b6b961dcf6091bed_13) |
|  | <u>[Condensed Consolidated Balance Sheets as of](#if0cf22f484b84387b6b961dcf6091bed_16)September 30, 2025[and](#if0cf22f484b84387b6b961dcf6091bed_16)December 31, 2024</u> | [3](#if0cf22f484b84387b6b961dcf6091bed_16) |
|  | <u>[Condensed Consolidated Statements of Operations for the](#if0cf22f484b84387b6b961dcf6091bed_19)three and nine[months ended](#if0cf22f484b84387b6b961dcf6091bed_19)September 30, 2025[and](#if0cf22f484b84387b6b961dcf6091bed_19)2024</u> | [4](#if0cf22f484b84387b6b961dcf6091bed_19) |
|  | <u>[Condensed Consolidated Statements of Comprehensive Loss for the](#if0cf22f484b84387b6b961dcf6091bed_22)three and nine[months ended](#if0cf22f484b84387b6b961dcf6091bed_22)September 30, 2025[and](#if0cf22f484b84387b6b961dcf6091bed_22)2024</u> | [5](#if0cf22f484b84387b6b961dcf6091bed_22) |
|  | <u>[Condensed Consolidated Statements of Stockholders' Equity for the](#if0cf22f484b84387b6b961dcf6091bed_25)three and nine months ended September 30, 2025 and 2024</u> | [6](#if0cf22f484b84387b6b961dcf6091bed_25) |
|  | <u>[Condensed Consolidated Statements of Cash Flows for the](#if0cf22f484b84387b6b961dcf6091bed_28)nine[months ended](#if0cf22f484b84387b6b961dcf6091bed_28)September 30, 2025[and](#if0cf22f484b84387b6b961dcf6091bed_28)2024</u> | [7](#if0cf22f484b84387b6b961dcf6091bed_28) |
|  | <u>[Notes to Condensed Consolidated Financial Statements](#if0cf22f484b84387b6b961dcf6091bed_34)</u> | [9](#if0cf22f484b84387b6b961dcf6091bed_34) |
| <u>[Item 2.](#if0cf22f484b84387b6b961dcf6091bed_79)</u> | <u>[Management's Discussion and Analysis of Financial Condition and Results of Operations](#if0cf22f484b84387b6b961dcf6091bed_79)</u> | [20](#if0cf22f484b84387b6b961dcf6091bed_79) |
| <u>[Item 3.](#if0cf22f484b84387b6b961dcf6091bed_100)</u> | <u>[Quantitative and Qualitative Disclosures About Market Risk](#if0cf22f484b84387b6b961dcf6091bed_100)</u> | [33](#if0cf22f484b84387b6b961dcf6091bed_100) |
| <u>[Item 4.](#if0cf22f484b84387b6b961dcf6091bed_103)</u> | <u>[Controls and Procedures](#if0cf22f484b84387b6b961dcf6091bed_103)</u> | [34](#if0cf22f484b84387b6b961dcf6091bed_103) |
| **<u>[PART II. OTHER INFORMATION](#if0cf22f484b84387b6b961dcf6091bed_106)</u>** | **<u>[PART II. OTHER INFORMATION](#if0cf22f484b84387b6b961dcf6091bed_106)</u>** | [35](#if0cf22f484b84387b6b961dcf6091bed_106) |
| <u>[Item 1.](#if0cf22f484b84387b6b961dcf6091bed_109)</u> | <u>[Legal Proceedings](#if0cf22f484b84387b6b961dcf6091bed_109)</u> | [35](#if0cf22f484b84387b6b961dcf6091bed_109) |
| <u>[Item 1A.](#if0cf22f484b84387b6b961dcf6091bed_112)</u> | <u>[Risk Factors](#if0cf22f484b84387b6b961dcf6091bed_112)</u> | [35](#if0cf22f484b84387b6b961dcf6091bed_112) |
| <u>[Item 5.](#if0cf22f484b84387b6b961dcf6091bed_115)</u> | <u>[Other Information](#if0cf22f484b84387b6b961dcf6091bed_115)</u> | [37](#if0cf22f484b84387b6b961dcf6091bed_115) |
| <u>[Item 6.](#if0cf22f484b84387b6b961dcf6091bed_118)</u> | <u>[Exhibits](#if0cf22f484b84387b6b961dcf6091bed_118)</u> | [38](#if0cf22f484b84387b6b961dcf6091bed_118) |
| <u>[Signatures](#if0cf22f484b84387b6b961dcf6091bed_121)</u> | <u>[Signatures](#if0cf22f484b84387b6b961dcf6091bed_121)</u> | [39](#if0cf22f484b84387b6b961dcf6091bed_121) |

---

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**PART I. FINANCIAL INFORMATION**

**Item 1. Financial Statements.**

**Editas Medicine, Inc.**

**Condensed Consolidated Balance Sheets**

**(unaudited)**

**(amounts in thousands, except share and per share data)**

---

| | | |
|:---|:---|:---|
| | **September 30,<br>2025** | **December 31,<br>2024** |
| **ASSETS** | | |
| Current assets: |  |  |
| &nbsp;&nbsp;Cash and cash equivalents | $165648 | $131541 |
| &nbsp;&nbsp;Marketable securities |  | 138372 |
| &nbsp;&nbsp;Accounts receivable | 8130 | 16266 |
| &nbsp;&nbsp;Prepaid expenses and other current assets | 3113 | 3136 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total current assets | 176891 | 289315 |
| Property and equipment, net | 4287 | 14497 |
| Right-of-use assets | 17583 | 32554 |
| Restricted cash and other non-current assets | 2990 | 5223 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total assets | $201751 | $341589 |
| **LIABILITIES AND STOCKHOLDERS' EQUITY** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;Accounts payable | $3163 | $5493 |
| &nbsp;&nbsp;Accrued expenses | 47522 | 45859 |
| &nbsp;&nbsp;Liability for sale of future revenues, current | 5000 | 5000 |
| &nbsp;&nbsp;Deferred revenue, current |  | 6221 |
| &nbsp;&nbsp;Operating lease liabilities | 6088 | 14652 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total current liabilities | 61773 | 77225 |
| Operating lease liabilities, net of current portion | 13564 | 20380 |
| Liability for sale of future revenues - non-current | 54069 | 52434 |
| Deferred revenue, net of current portion | 54204 | 54204 |
| Other non-current liabilities | 4688 | 3072 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities | 188298 | 207315 |
| Stockholders' equity |  |  |
| &nbsp;&nbsp;Preferred stock, $0.0001 par value per share: 5,000,000 shares authorized; no shares issued or outstanding |  |  |
| &nbsp;&nbsp;Common stock, $0.0001 par value per share: 390,000,000 and 195,000,000 shares authorized at September 30, 2025 and December 31, 2024, respectively; 93,264,421 and 82,734,696 shares issued and outstanding at September 30, 2025 and December 31, 2024, respectively | 9 | 8 |
| &nbsp;&nbsp;Additional paid-in capital | 1636327 | 1602441 |
| &nbsp;&nbsp;Accumulated other comprehensive income |  | 268 |
| &nbsp;&nbsp;Accumulated deficit | (1622883) | (1468443) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total stockholders' equity | 13453 | 134274 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total liabilities and stockholders' equity | $201751 | $341589 |

---

The accompanying notes are an integral part of the condensed consolidated financial statements.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**Condensed Consolidated Statements of Operations**

**(unaudited)**

**(amounts in thousands, except share and per share data)**

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** | **2025** | **2024** |
| Collaboration and other research and development revenues | $7543 | $61 | $15779 | $1710 |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;Research and development | 19775 | 47639 | 62549 | 150636 |
| &nbsp;&nbsp;General and administrative | 12316 | 18088 | 38550 | 55633 |
| &nbsp;&nbsp;Restructuring and impairment charges |  |  | 66935 |  |
| &nbsp;&nbsp;Total operating expenses | 32091 | 65727 | 168034 | 206269 |
| Operating loss | (24548) | (65666) | (152255) | (204559) |
| Other (expense) income, net: |  |  |  |  |
| &nbsp;&nbsp;Interest expense related to sale of future revenues | (2399) |  | (6635) |  |
| &nbsp;&nbsp;Interest income, net | 1831 | 3530 | 6634 | 12861 |
| &nbsp;&nbsp;Other expense, net | (1) | (5) | (2184) |  |
| &nbsp;&nbsp;Total other (expense) income, net | (569) | 3525 | (2185) | 12861 |
| Net loss | $(25117) | $(62141) | $(154440) | $(191698) |
| Net loss per share, basic and diluted | $(0.28) | $(0.75) | $(1.80) | $(2.33) |
| Weighted-average common shares outstanding, basic and diluted | 90090397 | 82485199 | 85878325 | 82245679 |

---

The accompanying notes are an integral part of the condensed consolidated financial statements.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**Condensed Consolidated Statements of Comprehensive Loss**

**(unaudited)**

**(amounts in thousands)**

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** | **2025** | **2024** |
| Net loss | $(25117) | $(62141) | $(154440) | $(191698) |
| Other comprehensive gain (loss): |  |  |  |  |
| &nbsp;&nbsp;Unrealized gain (loss) on marketable debt securities | (15) | 964 | (268) | 324 |
| Comprehensive loss | $(25132) | $(61177) | $(154708) | $(191374) |

---

The accompanying notes are an integral part of the condensed consolidated financial statements.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**Condensed Consolidated Statements of Stockholders' Equity**

**(unaudited)**

**(amounts in thousands, except share data)**

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Common Stock** | **Common Stock** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Income (Loss)** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| | **Shares** | **Amount** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Income (Loss)** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| **Balance at December 31, 2024** | 82734696 | $8 | $1602441 | $268 | $(1468443) | $134274 |
| Issuance of common stock from at-the-market equity offering, net | 706236 |  | 1435 |  |  | $1435 |
| Vesting of restricted common stock awards | 268604 |  |  |  |  |  |
| Stock-based compensation expense |  |  | 2979 |  |  | 2979 |
| Unrealized loss on marketable debt securities |  |  |  | (180) |  | (180) |
| Net loss |  |  |  |  | (76088) | (76088) |
| **Balance at March 31, 2025** | 83709536 | $8 | $1606855 | $88 | $(1544531) | $62420 |
| Issuance of common stock from at-the-market equity offering, net | 3419836 | 1 | 7184 |  |  | 7185 |
| Stock-based compensation expense |  |  | 2664 |  |  | 2664 |
| Vesting of restricted common stock awards | 102894 |  |  |  |  |  |
| Issuance of common stock under employee stock purchase plan | 156159 |  | 228 |  |  | 228 |
| Unrealized loss on marketable debt securities |  |  |  | (73) |  | (73) |
| Net loss |  |  |  |  | (53235) | (53235) |
| **Balance at June 30, 2025** | 87388425 | $9 | $1616931 | $15 | $(1597766) | $19189 |
| Issuance of common stock from at-the-market equity offering, net | 5799178 |  | 17147 |  |  | 17147 |
| Exercise of stock options | 12130 |  | 21 |  |  | 21 |
| Stock-based compensation expense |  |  | 2228 |  |  | 2228 |
| Vesting of restricted common stock awards | 64688 |  |  |  |  |  |
| Unrealized loss on marketable debt securities |  |  |  | (15) |  | (15) |
| Net loss |  |  |  |  | (25117) | (25117) |
| **Balance at September 30, 2025** | 93264421 | $9 | $1636327 | $— | $(1622883) | $13453 |

---

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Common Stock** | **Common Stock** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Loss** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| | **Shares** | **Amount** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Loss** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| **Balance at December 31, 2023** | 81767263 | $8 | $1580241 | $198 | $(1231350) | $349097 |
| Exercise of stock options | 21975 |  | 192 |  |  | 192 |
| Vesting of restricted common stock awards | 445713 |  |  |  |  |  |
| Stock-based compensation expense |  |  | 7585 |  |  | 7585 |
| Unrealized loss on marketable debt securities |  |  |  | (524) |  | (524) |
| Net loss |  |  |  |  | (61950) | (61950) |
| **Balance at March 31, 2024** | 82234951 | $8 | $1588018 | $(326) | $(1293300) | $294400 |
| Stock-based compensation expense |  |  | 5010 |  |  | 5010 |
| Vesting of restricted common stock awards | 121643 |  |  |  |  |  |
| Issuance of common stock under employee stock purchase plan | 72920 |  | 322 |  |  | 322 |
| Unrealized loss on marketable debt securities |  |  |  | (116) |  | (116) |
| Net loss |  |  |  |  | (67607) | (67607) |
| **Balance at June 30, 2024** | 82429514 | $8 | $1593350 | $(442) | $(1360907) | $232009 |
| Vesting of restricted common stock awards | 109110 |  |  |  |  |  |
| Stock-based compensation expense |  |  | 4802 |  |  | 4802 |
| Unrealized gain on marketable debt securities |  |  |  | 964 |  | 964 |
| Net loss |  |  |  |  | (62141) | (62141) |
| **Balance at September 30, 2024** | 82538624 | $8 | $1598152 | $522 | $(1423048) | $175634 |

---

The accompanying notes are an integral part of the condensed consolidated financial statements.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**Condensed Consolidated Statements of Cash Flows**

**(unaudited)**

**(amounts in thousands)**

---

| | | |
|:---|:---|:---|
| | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** |
| **Cash flow from operating activities** |  |  |
| Net loss | $(154440) | $(191698) |
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
| &nbsp;&nbsp;Stock-based compensation expense | 7871 | 17397 |
| &nbsp;&nbsp;Depreciation | 4472 | 4428 |
| &nbsp;&nbsp;Loss on disposal of fixed assets | 2193 | 139 |
| &nbsp;&nbsp;Net accretion of discounts on marketable securities | (902) | (4922) |
| &nbsp;&nbsp;Interest related to sale of future revenues | 6635 |  |
| &nbsp;&nbsp;Impairment of held for sale assets | 3724 |  |
| &nbsp;&nbsp;Other non-cash items | (390) | (415) |
| Changes in operating assets and liabilities: |  |  |
| &nbsp;&nbsp;Accounts receivable | 8136 | 10061 |
| &nbsp;&nbsp;Prepaid expenses and other current assets | 175 | 1607 |
| &nbsp;&nbsp;Right-of-use assets | 10122 | (2048) |
| &nbsp;&nbsp;Other non-current assets | 1026 | 3306 |
| &nbsp;&nbsp;Accounts payable | (2330) | 4713 |
| &nbsp;&nbsp;Accrued expenses | 1728 | (5523) |
| &nbsp;&nbsp;Accrued interest on sale of future revenues | (2128) |  |
| &nbsp;&nbsp;Deferred revenue | (6221) |  |
| &nbsp;&nbsp;Operating lease liabilities | (10531) | 1952 |
| &nbsp;&nbsp;Other non-current liabilities | 2006 | 1481 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash used in operating activities | $(128854) | $(159522) |
| **Cash flow from investing activities** |  |  |
| Purchases of property and equipment | (547) | (8286) |
| Proceeds from the sale of equipment | 151 |  |
| Purchases of marketable securities |  | (86221) |
| Proceeds from maturities of marketable securities | 139006 | 225695 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash provided by investing activities | $138610 | $131188 |
| **Cash flow from financing activities** |  |  |
| Repayment on sale of future revenues | (2872) |  |
| Proceeds from issuance of common stock from at-the-market equity offering, net | 25767 |  |
| Proceeds from exercise of stock options | 21 | 192 |
| Proceeds from issuance of common stock under employee stock purchase plan | 228 | 322 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net cash provided by financing activities | $23144 | $514 |
| Net increase (decrease) in cash, cash equivalents, and restricted cash | 32900 | (27820) |
| Cash, cash equivalents, and restricted cash, beginning of period | 135418 | 127529 |
| Cash, cash equivalents, and restricted cash, end of period | $168318 | $99709 |
| Cash and cash equivalents, end of period | 165648 | 95832 |
| Restricted cash<sup>1</sup> | 2670 | 3877 |
| Cash, cash equivalents, and restricted cash, end of period | $168318 | $99709 |

---

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

---

| | | |
|:---|:---|:---|
| <sup>1</sup> As of September 30, 2025 and September 30, 2024, restricted cash of $2,670 and $3,877 was included in Restricted cash and other non-current assets on the Consolidated Balance Sheet, respectively. | <sup>1</sup> As of September 30, 2025 and September 30, 2024, restricted cash of $2,670 and $3,877 was included in Restricted cash and other non-current assets on the Consolidated Balance Sheet, respectively. | <sup>1</sup> As of September 30, 2025 and September 30, 2024, restricted cash of $2,670 and $3,877 was included in Restricted cash and other non-current assets on the Consolidated Balance Sheet, respectively. |
| **Supplemental disclosure of cash and non-cash activities:** |  |  |
| Fixed asset additions included in accounts payable and accrued expenses | $— | $134 |
| Cash paid in connection with operating lease liabilities | $12992 | $12565 |
| Remeasurement of operating lease liabilities and right-of-use assets due to lease modification | $766 | $794 |
| Commencement of right-of-use asset | $— | $7844 |
| Modification of right-of-use asset | $— | $1954 |
| Non-cash termination of right-of-use asset | $4849 | $— |

---

The accompanying notes are an integral part of the condensed consolidated financial statements.

------

<u>[**Table of Contents**](#if0cf22f484b84387b6b961dcf6091bed_7)</u>

**Editas Medicine, Inc.**

**Notes to Condensed Consolidated Financial Statements**

**(unaudited)**

**1. Nature of Business**

Editas Medicine, Inc. (the "Company") is a pioneering gene editing company dedicated to developing transformative genomic medicines to treat a broad range of serious diseases. The Company was incorporated in the state of Delaware in September 2013. Its principal offices are in Cambridge, Massachusetts.

Since its inception, the Company has devoted substantially all of its efforts to business planning, research and development, recruiting management and technical staff, and raising capital. The Company has primarily financed its operations through various equity financings, payments received under a research collaboration with the Bristol-Myers Squibb Company ("BMS"), through its wholly owned subsidiary Juno Therapeutics, Inc. ("Juno Therapeutics"), payments received under its former strategic alliance with Allergan Pharmaceuticals International Limited (together with its affiliates, "Allergan"), which was terminated in August 2020, payments received under a purchase and sale agreement with DRI Healthcare Acquisitions LP ("DRI"), and payments received under the Company's license agreement with Vertex Pharmaceuticals, Inc ("Vertex", and such agreement, the "Vertex License Agreement").

The Company is subject to risks common to companies in the biotechnology industry, including but not limited to, risks of failure of preclinical studies and clinical trials, the need to obtain marketing approval for any drug product candidate that it may identify and develop, the need to successfully commercialize and gain market acceptance of its product candidates, dependence on key personnel, protection of proprietary technology, compliance with government regulations, development by competitors of technological innovations and ability to transition from pilot-scale manufacturing to large-scale production of products.

***Liquidity***

As of September 30, 2025, the Company has raised an aggregate of $1.0 billion in net proceeds through the sale of shares of its common stock in public offerings and at-the-market offerings. The Company also has funded its business from payments received under its purchase and sale agreement with DRI, payments received under the Vertex License Agreement, its research collaboration with BMS through its wholly owned subsidiary Juno Therapeutics and its former strategic alliance with Allergan (which was terminated in August 2020). As of September 30, 2025, the Company had cash, cash equivalents and marketable securities of $165.6 million.

In May 2021, the Company entered into a common stock sales agreement with TD Securities (USA) LLC (as successor to Cowen and Company, LLC) ("TD Cowen"), under which the Company from time to time can issue and sell shares of the Company's common stock through TD Cowen in at-the-market offerings for aggregate gross sale proceeds of up to $300.0 million. The Company amended the common stock sales agreement with TD Cowen in February 2024 in connection with filing a new registration statement. In March 2025, the Company further amended its common stock sales agreement with TD Cowen in connection with amending its existing shelf registration statement following the loss of the Company's status as a "well-known seasoned issuer" (as defined under Rule 405 of the Securities Act of 1933, as amended), reducing the amount of shares of common stock the Company may issue and sell through TD Cowen to aggregate gross sale proceeds of up to $150.0 million (the "ATM Facility"). As of September 30, 2025, the Company has sold 9,925,250 shares of common stock under the ATM Facility for gross proceeds of $26.4 million and has $123.6 million of shares of common stock remaining available for issuance and sale under the ATM Facility.

The Company has incurred annual net operating losses in every year since its inception. As of November 10, 2025, the issuance date of the condensed consolidated financial statements, the Company expects that its existing cash and cash equivalents will be sufficient to fund its operating expenses and capital expenditure requirements into the third quarter of 2027. The Company had an accumulated deficit of $1.6 billion at September 30, 2025, and will require substantial additional capital to fund its operations. The Company has never generated any product revenue. There can be no assurance that the Company will be able to obtain additional debt or equity financing or generate product revenue or revenues from collaborative partners, on terms acceptable to the Company, on a timely basis or at all. The failure of the Company to obtain sufficient funds on acceptable terms when needed could have a material adverse effect on the Company's business, results of operations, and financial condition.

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**2. Summary of Significant Accounting Policies**

***Unaudited Interim Financial Information***

The condensed consolidated financial statements of the Company included herein have been prepared, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the "SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States of America have been condensed or omitted from this report, as is permitted by such rules and regulations. Accordingly, these condensed consolidated financial statements should be read in conjunction with the financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the "Annual Report").

The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries, Editas Securities Corporation and Editas Medicine, LLC. All intercompany transactions and balances of the subsidiaries have been eliminated in consolidation. In the opinion of management, the information furnished reflects all adjustments, all of which are of a normal and recurring nature, necessary for a fair presentation of the results for the reported interim periods. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. The three months ended September 30, 2025 and 2024 are referred to as the third quarter of 2025 and 2024, respectively. The results of operations for interim periods are not necessarily indicative of results to be expected for the full year or any other interim period.

***Summary of Significant Accounting Policies***

The Company's significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies," to the consolidated financial statements included in the Annual Report. There have been no material changes to the significant accounting policies previously disclosed in the Annual Report with the exception of the following:

***Restructuring*** 

The Company records liabilities for costs associated with restructuring activities in the period in which the liability is incurred. Typical costs associated with restructuring activities include, employee termination benefits, contract termination costs and on-going contract costs for which there is no economic benefit. For costs associated with employee terminations in which the employee is subject to an existing benefit arrangement, the post-employment benefits are recognized when probable and estimable. Other employee termination costs are measured and recognized on the communication date, unless there is a required future service period, in which case, the expense is recognized over the service period. Contract termination costs are recognized upon termination of the contract and costs for on-going contracts for which there is no future benefit, are recognized at fair value on the cease-use date.

The Company has made estimates and judgments regarding the amount and timing of its restructuring expense and liability, including current and future period termination benefits and other exit costs to be incurred when related actions take place. Restructuring charges are reflected in the Company's condensed consolidated statements of operations. Actual results may differ from these estimates. Refer to Note 12, "Restructuring and Impairment Charges" for further information.

***Recently Adopted Accounting Pronouncements***

In December 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2023-09 *Income Taxes (Topic 740): Improvements to Income Tax Disclosures*. This guidance is intended to enhance the transparency and decision-usefulness of income tax disclosures. The amendments in ASU 2023-09 address investor requests for enhanced income tax information primarily through changes to disclosure regarding rate reconciliation and income taxes paid both in the United States and in foreign jurisdictions. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024 on a prospective basis, with the option to apply the standard retrospectively. Early adoption is permitted. The Company will incorporate the changes in disclosure requirements in its financial statements included in its 2025 Annual Report.

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***Recently Issued Accounting Pronouncements***

In November 2024, the FASB issued ASU 2024-03 *Income Statement - Reporting Comprehensive Income -Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses*, which is intended to improve the disclosure of expenses by providing more detailed information about the types of expenses in commonly presented expense captions. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2026, and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments can be applied either prospectively or retrospectively. The Company has not early adopted this ASU and is currently evaluating the impact of this new standard on its consolidated financial statements and related disclosures.

**3. Cash Equivalents and Marketable Securities** 

Cash equivalents consisted of the following at September 30, 2025 (in thousands):

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **Amortized<br>Cost** | **Allowance<br>for Credit<br>Losses** | **Gross<br>Unrealized<br>Gains** | **Gross<br>Unrealized<br>Losses** | **Fair<br>Value** |
| Cash equivalents: |  |  |  |  |  |
| &nbsp;&nbsp;Money market funds | 165648 |  |  |  | 165648 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total | $165648 | $— | $— | $— | $165648 |

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Cash equivalents and marketable securities consisted of the following at December 31, 2024 (in thousands):

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **Amortized<br>Cost** | **Allowance<br>for Credit<br>Losses** | **Gross<br>Unrealized<br>Gains** | **Gross<br>Unrealized<br>Losses** | **Fair<br>Value** |
| Cash equivalents and marketable securities: |  |  |  |  |  |
| &nbsp;&nbsp;Money market funds | 131541 |  |  |  | 131541 |
| &nbsp;&nbsp;Corporate notes/bonds | 6522 |  |  | (21) | 6501 |
| &nbsp;&nbsp;U.S. Treasuries | 131582 |  | 289 |  | 131871 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total | $269645 | $— | $289 | $(21) | $269913 |

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There were no realized gains or losses on available-for-sale securities during the nine months ended September 30, 2025 or 2024.

**4. Fair Value Measurements**

Assets measured at fair value on a recurring basis as of September 30, 2025 were as follows (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **September 30,<br>2025** | **Quoted Prices<br>in Active<br>Markets for<br>Identical Assets<br>(Level 1)** | **Significant<br>Other<br>Observable<br>Inputs<br>(Level 2)** | **Significant<br>Unobservable<br>Inputs<br>(Level 3)** |
| Cash equivalents: |  |  |  |  |
| &nbsp;&nbsp;Money market funds | $165648 | $165648 | $— | $— |
| Restricted cash and other non-current assets: |  |  |  |  |
| &nbsp;&nbsp;Money market funds | 2670 | 2670 |  |  |
| &nbsp;&nbsp;Total financial assets | $168318 | $168318 | $— | $— |

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Assets measured at fair value on a recurring basis as of December 31, 2024 were as follows (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **December 31,<br>2024** | **Quoted Prices<br>in Active<br>Markets for<br>Identical Assets<br>(Level 1)** | **Significant<br>Other<br>Observable<br>Inputs<br>(Level 2)** | **Significant<br>Unobservable<br>Inputs<br>(Level 3)** |
| Cash equivalents: |  |  |  |  |
| &nbsp;&nbsp;Money market funds | $131541 | $131541 | $— | $— |
| Marketable securities: |  |  |  |  |
| &nbsp;&nbsp;Corporate notes/bonds | 6501 |  | 6501 |  |
| &nbsp;&nbsp;U.S. Treasuries | 131871 | 131871 |  |  |
| Restricted cash and other non-current assets: |  |  |  |  |
| &nbsp;&nbsp;Money market funds | 3877 | 3877 |  |  |
| &nbsp;&nbsp;Total financial assets | $273790 | $267289 | $6501 | $— |

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The fair value of the Company's liability for sale of future revenues approximates the amount recorded on the Company's balance sheet as of September 30, 2025 and December 31, 2024, which represents a level 3 fair value measurement.

**5. Accrued Expenses**

Accrued expenses consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **September 30,<br>2025** | **December 31,<br>2024** |
| External research and development expenses | $5669 | $11630 |
| Employee related expenses | 6158 | 11516 |
| Sublicense and license fees | 516 | 6609 |
| Intellectual property and patent related fees | 1543 | 1471 |
| Professional service expenses | 467 | 1593 |
| Employee termination benefits | 3782 | 10475 |
| Contract termination costs | 29082 | 1757 |
| Other expenses | 305 | 808 |
| &nbsp;&nbsp;Total accrued expenses | $47522 | $45859 |

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**6. Property and Equipment, net**

Property and equipment, net consisted of the following (in thousands):

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| | | |
|:---|:---|:---|
| | **September 30,<br>2025** | **December 31,<br>2024** |
| Laboratory and manufacturing equipment | $21418 | $29128 |
| Leasehold improvements | 8403 | 11749 |
| Computer equipment | 1399 | 1490 |
| Construction-in-progress | 79 | 827 |
| Furniture and office equipment | 191 | 264 |
| Software | 344 | 2687 |
| Total property and equipment | 31834 | 46145 |
| Less: accumulated depreciation | (27547) | (31648) |
| &nbsp;&nbsp;Property and equipment, net | $4287 | $14497 |

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**7. Commitments and Contingencies**

The Company is a party to a number of license agreements under which the Company licenses patents, patent applications and other intellectual property from third parties. As such, the Company is obligated to pay licensors for various costs including upfront license fees, annual license fees, certain licensor expense reimbursements, success payments, research funding payments, and milestones triggerable upon certain development, regulatory, and commercial events as well as royalties on future product sales. These contracts are generally cancellable, with notice, at the Company's option and do not have significant cancellation penalties. The terms and conditions as well as the accounting analysis for the Company's significant commitments and contingencies are described in Note 8, "Commitments and Contingencies" to the consolidated financial statements included in the Annual Report. There have been no material changes to the terms and conditions, or the accounting conclusions, previously disclosed in the Annual Report.

***Licensor Expense Reimbursement***

The Company is obligated to reimburse The Broad Institute, Inc. ("Broad") and the President and Fellows of Harvard College ("Harvard") for expenses incurred by each of them associated with the prosecution and maintenance of the patent rights that the Company licenses from them pursuant to the Amended and Restated Cas9-I License Agreement by and among the Company, Broad and Harvard, including the interference and opposition proceedings involving patents licensed to the Company under the license agreement, and other license agreements between the Company and Broad. As such, the Company anticipates that it has a substantial commitment in connection with these proceedings until such time as these proceedings have been resolved, but the amount of such commitment is not determinable. The Company incurred an aggregate of $3.2 million and $7.4 million in expenses during the three and nine months ended September 30, 2025. The Company incurred an aggregate of $2.1 million and $6.6 million in expense during the three and nine months ended September 30, 2024, respectively, for such reimbursement.

***Lease Termination***

In 2023, the Company entered into a license and service agreement pursuant to which it leased manufacturing space for its continued research and development activities. The lease commenced April 1, 2024. In September 2024, the Company entered into a modification of the lease, and as a result of the modification the lease payments decreased and the notification period for the termination of the license and service agreement increased from 12 months' prior written notice to 18 months' prior written notice. In January 2025, the Company gave its termination notice on the license and service agreement, which resulted in the end of the term of the agreement being July 2026, and $8.9 million of remaining payments owed. In April 2025, the Company entered into a further modification to the lease providing that the lease would terminate on April 30, 2025 with a final fixed payment of $3.7 million.

**8. Collaboration Agreements** 

The Company has entered into multiple collaborations, out-licenses and strategic alliances with third parties that typically involve payments to or from the Company, including up-front payments, payments for research and development services, option payments, milestone payments and royalty payments to or from the Company. The terms and conditions as well as the accounting analysis for the Company's significant collaborations, out-licenses and strategic alliances are described in Note 9, "Collaboration Agreements" to the consolidated financial statements included in the Annual Report.

There have been no other material changes to the terms and conditions, or the accounting conclusions, previously disclosed in the Annual Report.

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***Collaboration Revenue***

As of September 30, 2025, the Company's contract liabilities were primarily related to the Company's collaboration with BMS. The following table presents changes in the Company's accounts receivable and contract liabilities for the nine months ended September 30, 2025 (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Balance at December 31, 2024** | **Additions** | **Deductions** | **Balance at September 30, 2025** |
| Accounts receivable | $16266 | $9821 | $(17957) | $8130 |
| Contract liabilities: |  |  |  |  |
| &nbsp;&nbsp;Deferred revenue | $60425 | $— | $(6221) | $54204 |

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During the three and nine months ended September 30, 2025 and 2024, the Company recognized the following collaboration revenue (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **September 30,<br>2025** | **September 30,<br>2025** | **September 30,<br>2024** | **September 30,<br>2024** |
| | **Three Months Ended** | **Nine Months Ended** | **Three Months Ended** | **Nine Months Ended** |
| Amounts included in deferred revenue at the beginning of the period | $— | $6221 | $— | $— |

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***Amendment to BMS Collaboration Agreement***

In March 2024, the Company entered into an amendment ("2024 Amendment") to the Second Amended and Restated Collaboration and License Agreement, dated as of November 11, 2019, by and between the Company and Juno Therapeutics (the "2019 Collaboration Agreement"), to extend the collaboration to November 2026, with options to extend the collaboration for up to an additional two years, and provided Juno Therapeutics the ability to select up to three new gene targets for research. The 2019 Collaboration Agreement, as amended by the 2024 Amendment, is herein referred to as the 2019 Amended Collaboration Agreement.

The Company's accounting assessment for the 2024 Amendment is described in Note 9, "Collaboration Agreements," to the consolidated financial statements included in the Annual Report.

During the three months ended September 30, 2025, the Company recognized $7.5 million of revenue related to a milestone achieved in the third quarter of 2025 from its collaboration with BMS, none of which was previously deferred. The Company did not recognize any revenue related to its collaboration with BMS during the three months ended September 30, 2024. As of September 30, 2025, there was no short-term deferred revenue and $50.2 million of long-term deferred revenue in the accompanying consolidated balance sheets.

**9. Stock-based Compensation**

Total compensation cost recognized for all stock-based compensation awards in the condensed consolidated statements of operations was as follows (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** | **2025** | **2024** |
| Research and development | $634 | $2048 | $2404 | $7081 |
| General and administrative | 1594 | 2754 | 5467 | 10316 |
| Total stock-based compensation expense | $2228 | $4802 | $7871 | $17397 |

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***Restricted Stock Unit Awards***

The following is a summary of restricted stock unit awards activity for the nine months ended September 30, 2025:

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| | | |
|:---|:---|:---|
| | **Shares** | **Weighted Average Grant Date Fair Value Per Share** |
| Unvested restricted stock unit awards as of December 31, 2024 | 2326523 | $9.78 |
| Issued | 1560 | $1.26 |
| Vested | (436186) | $10.30 |
| Forfeited | (1239630) | $9.99 |
| Unvested restricted stock unit awards as of September 30, 2025 | 652267 | $9.12 |

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There were no restricted stock units that contained performance-based vesting provisions granted in the nine months ended September 30, 2025. There was no expense related to the vesting of performance-based restricted stock units for the three and nine months ended September 30, 2025. There was no expense related to the vesting of performance-based restricted stock units for the three months ended September 30, 2024. Expense related to the vesting of performance-based restricted stock units was $3.5 million for the nine months ended September 30, 2024.

As of September 30, 2025, total unrecognized compensation expense related to unvested restricted stock unit awards was $3.2 million, which the Company expects to recognize over a remaining weighted-average period of 1.65 years.

***Stock Options***

The following is a summary of stock option activity for the nine months ended September 30, 2025:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Shares** | **Weighted Average<br>Exercise Price** | **Remaining<br>Contractual Life (years)** | **Aggregate Intrinsic<br>Value** |
| Outstanding at December 31, 2024 | 7656010 | $14.70 | 7.19 | $— |
| &nbsp;&nbsp;Granted | 5732792 | $1.74 |  |  |
| &nbsp;&nbsp;Exercised | (12130) | $1.72 |  |  |
| &nbsp;&nbsp;Cancelled | (4395961) | $9.91 |  |  |
| Outstanding at September 30, 2025 | 8980711 | $8.81 | 7.44 | $7553 |
| Exercisable at September 30, 2025 | 3941705 | $15.73 | 5.41 | $818 |

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As of September 30, 2025, total unrecognized compensation expense related to stock options was $11.3 million, which the Company expects to recognize over a remaining weighted-average period of 2.5 years.

**10. Net Loss per Share**

Basic net loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period, without consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted average number of shares of common stock and potentially dilutive securities outstanding for the period determined using the treasury stock and if converted methods. Contingently issuable shares are included in the calculation of basic loss per share as of the beginning of the period in which all the necessary conditions have been satisfied. Contingently issuable shares are included in diluted loss per share based on the number of shares, if any, that would be issuable under the terms of the arrangement if the end of the reporting period was the end of the contingency period, if the results are dilutive.

For purposes of the diluted net loss per share calculation, unvested restricted stock unit awards and outstanding stock options are considered to be common stock equivalents, but they were excluded from the Company's calculation of

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diluted net loss per share allocable to common stockholders because their inclusion would have been anti-dilutive. Therefore, basic and diluted net loss per share applicable to common stockholders were the same for all periods presented.

The following common stock equivalents were excluded from the calculation of diluted net loss per share allocable to common stockholders because their inclusion would have been anti-dilutive:

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| | | |
|:---|:---|:---|
| | **September 30,** | **September 30,** |
| | **2025** | **2024** |
| Unvested restricted stock unit awards | 652267 | 2540456 |
| Outstanding stock options | 8980711 | 8167944 |
| &nbsp;&nbsp;Total | 9632978 | 10708400 |

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**11. Debt** 

***Liability for the Sale of Future Revenues***

On October 3, 2024, the Company entered into a purchase and sale agreement (the "Purchase and Sale Agreement") with DRI under which it sold, transferred, assigned, and conveyed to DRI certain future license fees and other payments (the "Purchased Receivables") owed to the Company by Vertex under the terms of the Vertex License Agreement in exchange for an upfront cash payment by DRI to the Company of $57.0 million. Under the Purchase and Sale Agreement, DRI is purchasing up to 100% of certain future fixed and sales-based annual license fees owed to the Company under the Vertex License Agreement, which fees range from $5.0 million to $40.0 million per year (inclusive of certain sales-based annual license fee increases) and a mid-double-digit percentage of a $50.0 million contingent upfront payment that the Company may receive under the Vertex License Agreement, in each case after subtracting amounts that will be owed by the Company to Broad and Harvard (each term as defined in Note 8, respectively). The Company has retained rights to its portions of certain other sales-based annual license fees and the contingent upfront payment that may become due under the Vertex License Agreement, and the amounts that correspond to its licensor obligations.

In accordance with Accounting Standards Codification ("ASC") Topic 470, *Borrower's Accounting for Debt Modification*, the Company has accounted for the transaction as debt. The gross proceeds of $57.0 million were recorded as a liability for the sale of future revenues, net of transaction costs of $1.8 million, which will be amortized over the estimated life of the arrangement using the effective interest method.

The Company estimates the effective interest rate used to record non-cash interest expense under the Purchase and Sale Agreement based on the estimate of future revenue payments to be made to DRI. As of September 30, 2025, the estimated effective interest rate under the agreement was 15.0%. Over the life of the arrangement, the actual effective interest rate will be affected by the amount and timing of the payments made to DRI and changes in the Company's revenue forecasts. At each reporting date, the Company will reassess its estimate of total future payments to be made to DRI, and prospectively adjust the effective interest rate and amortization of the liability as necessary.

The following table presents the changes in the liability related to the sale of future revenues under the Purchase and Sale Agreement with DRI as of September 30, 2025 (in thousands):

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| | |
|:---|:---|
| | **September 30, 2025** |
| Deferred royalty obligation related to the sale of future revenues, net as of December 31, 2024 | $57434 |
| &nbsp;&nbsp;Payments for sale of future revenues | (5000) |
| &nbsp;&nbsp;Non-cash interest expense associated with sale of future revenues | 6454 |
| &nbsp;&nbsp;Amortization of issuance costs | 181 |
| Deferred royalty obligation related to the sale of future revenues, net as of September 30, 2025 | $59069 |

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**12. Restructuring and Impairment Charges**

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On December 11, 2024, the Company's board of directors approved the discontinuation of the clinical development of the Company's renizgamglogene autogedtemcel ("reni-cel") program to treat sickle cell disease and transfusion-dependent beta thalassemia (the "Discontinuation"). As a result of the Discontinuation, the Company ceased activities towards the filing of a biologic license application and potential commercialization of reni-cel. In connection with the Discontinuation, the Company's board of directors also approved a reduction in the Company's employee workforce by approximately 180 positions, or approximately 65% (the "Reduction").

The Company incurred the following restructuring and impairment charges in connection with the Discontinuation and Reduction for the three and nine months ended September 30, 2025, which are recorded in the consolidated statements of operations (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2025** |
| Employee termination benefits | $— | $4322 |
| Costs for ongoing contracts and terminated contracts |  | 52341 |
| Acceleration of expense for change in useful life estimate and lease termination | **—** | 6548 |
| Impairment charges |  | 3724 |
| Total restructuring and impairment charges | $— | $66935 |

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The actions associated with the Discontinuation and Reduction commenced in December 2024 and are expected to be substantially completed by the end of 2025.

***Employee Termination Benefits***

Employees affected by the Reduction received involuntary termination benefits pursuant to either a one-time benefit or arrangement or salary continuation for a set period of time in accordance with the Company's Amended and Restated Severance Benefit Plan (the "Benefit Plan"). For employees who were notified of their termination in December 2024 and had no requirements to provide future services or were subject to the Benefit Plan, the Company recognized the liability for the termination benefits in full at fair value in the fourth quarter of 2024. For employees who are required to render services beyond a minimum retention period to receive their one-time termination benefits or salary continuation, the Company is recognizing the termination benefits ratably over their future service periods. The service periods began in December 2024 and were completed by September 30, 2025.

The following table shows the liability related to employee termination benefits as of September 30, 2025 (in thousands):

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| | |
|:---|:---|
| | **Employee Termination Benefits** |
| Accrued employee termination benefits as of December 31, 2024 | $10475 |
| &nbsp;&nbsp;Employee termination benefits charges incurred during period | 4322 |
| &nbsp;&nbsp;Amounts paid or otherwise settled during the period | (11015) |
| Accrued employee termination benefits as of September 30, 2025 | $3782 |

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In total, the Company expects that it will incur approximately $15.0 million of employee termination benefit expense to implement the Reduction.

***Costs for Ongoing Contracts and Terminated Contracts***

The Discontinuation resulted in contract termination costs from vendor contracts before the end of their term, as well as costs that continue to be incurred under certain contracts with no future economic benefit to the Company. In accordance with ASC 420, the Company recognized these unavoidable contract costs when incurred for terminated contracts or at the cease-use date, as it relates to contract costs that continue to be incurred.

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The following table shows the liability related to costs for ongoing contracts and contract termination costs as of September 30, 2025 (in thousands):

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| | |
|:---|:---|
| | **Contract Costs** |
| Accrued contract costs as of December 31, 2024 | $1757 |
| &nbsp;&nbsp;Contract costs incurred during the period | 52341 |
| &nbsp;&nbsp;Amounts paid or otherwise settled during the period | (20809) |
| Accrued contract costs as of September 30, 2025 | $33289 |

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At September 30, 2025, $4.2 million of accrued contract costs was included in Other non-current liabilities on the Condensed Consolidated Balance Sheet.

These costs are subject to significant estimation based on the Company's expectation of the costs that will continue to be incurred on the contracts, as well as negotiation of contract changes and terminations with its vendors. Changes in this estimate will be made in the period the information is knowable and could be material.

***Impairment and Accelerated Depreciation Charges*** 

In conjunction with the Discontinuation, the Company committed to a plan to actively sell specific assets within its asset group, primarily certain of its laboratory and manufacturing equipment. At March 31, 2025, the laboratory and manufacturing equipment met all of the prescribed criteria required to classify it as held for sale. The Company recorded $0.3 million of held for sale assets at their fair value at March 31, 2025, resulting in a $3.7 million impairment charge during the three months ended March 31, 2025. The sale was completed in April 2025.

Additionally, the Company abandoned certain other leasehold improvements, software, and right of use assets in the second quarter of 2025, and as a result, the Company accelerated depreciation and rent expense and recorded the following in the condensed consolidated statements of operations (in thousands):

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| | | |
|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2025** |
| Accelerated depreciation related to leasehold improvements and software | $— | $1790 |
| Charges related to termination of lease |  | 4758 |
| &nbsp;&nbsp;Total | $— | $6548 |

---

**13. Segments**

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the Chief Operating Decision Maker ("CODM") or decision-making group in making decisions on how to allocate resources and assess performance. The Company's CODM is its CEO. The CEO views the Company's operations and manages the Company's business as one operating segment, which is the business of developing and commercializing genome editing technology.

The Company's CEO manages and allocates resources to the operations of the Company on a total company basis by assessing the overall level of resources available and how to best deploy these resources across functions and research and development projects that are in line with our long-term company-wide strategic goals. In making these decisions, the Company's CEO uses consolidated financial information for purposes of evaluating performance, forecasting future period financial results, allocating resources and setting incentive targets. The CODM performs this assessment based on the Company's consolidated net loss. Through this analysis, the CODM assesses performance by comparing actual consolidated net loss versus the budget, and then decides how to allocate resources to invest in the Company's research and development programs. The measure of segment assets is reported on the consolidated balance sheet as total assets.

The following table contains additional information on our consolidated revenue and net loss, including significant segment expenses (in thousands):

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** | **2025** | **2024** |
| Collaboration and other research and development revenues | $7543 | $61 | $15779 | $1710 |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development<sup>1</sup> |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee related expenses | 6468 | 14486 | 29210 | 41830 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;External research and development expenses | 6465 | 20058 | 66930 | 64670 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Facility expenses | 3254 | 7229 | 17228 | 19818 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation expenses | 634 | 2048 | 2404 | 7081 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sublicense and license fees | 1292 | 307 | 1404 | 7060 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other expenses<sup>2</sup> | 1662 | 3511 | 9447 | 10177 |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative<sup>3</sup> |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee related expenses | 2491 | 5902 | 11033 | 15594 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Professional service expenses | 1902 | 4121 | 7262 | 10929 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Intellectual property and patent related fees | 5279 | 3291 | 11836 | 11080 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation expenses | 1594 | 2754 | 5467 | 10316 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Facility and other expenses<sup>4</sup> | 1050 | 2020 | 5813 | 7714 |
| &nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 32091 | 65727 | 168034 | 206269 |
| Operating loss | (24548) | (65666) | (152255) | (204559) |
| Other (expense) income, net: |  |  |  |  |
| Interest expense related to sale of future revenues | (2399) |  | (6635) |  |
| Interest income, net | 1831 | 3530 | 6634 | 12861 |
| Other expense, net | (1) | (5) | (2184) |  |
| Total other (expense) income, net | (569) | 3525 | (2185) | 12861 |
| Net loss | $(25117) | $(62141) | $(154440) | $(191698) |
| <sup>1</sup> The nine months ended September 30, 2025 include $64,075 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>1</sup> The nine months ended September 30, 2025 include $64,075 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>1</sup> The nine months ended September 30, 2025 include $64,075 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>1</sup> The nine months ended September 30, 2025 include $64,075 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>1</sup> The nine months ended September 30, 2025 include $64,075 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. |
| <sup>2</sup> Other expenses primarily consists of impairment charges, consultant fees and office expenses.  | <sup>2</sup> Other expenses primarily consists of impairment charges, consultant fees and office expenses.  | <sup>2</sup> Other expenses primarily consists of impairment charges, consultant fees and office expenses.  | <sup>2</sup> Other expenses primarily consists of impairment charges, consultant fees and office expenses.  | <sup>2</sup> Other expenses primarily consists of impairment charges, consultant fees and office expenses.  |
| <sup>3</sup> The nine months ended September 30, 2025 include $2,860 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>3</sup> The nine months ended September 30, 2025 include $2,860 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>3</sup> The nine months ended September 30, 2025 include $2,860 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>3</sup> The nine months ended September 30, 2025 include $2,860 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. | <sup>3</sup> The nine months ended September 30, 2025 include $2,860 of restructuring and impairment charges. The three months ended September 30, 2025 and the three and nine months ended September 30, 2024 include no restructuring and impairment charges, respectively. |
| <sup>4</sup> Facility and other expenses primarily consists of rent expense, insurance premiums, depreciation expense, software licenses and office expenses.  | <sup>4</sup> Facility and other expenses primarily consists of rent expense, insurance premiums, depreciation expense, software licenses and office expenses.  | <sup>4</sup> Facility and other expenses primarily consists of rent expense, insurance premiums, depreciation expense, software licenses and office expenses.  | <sup>4</sup> Facility and other expenses primarily consists of rent expense, insurance premiums, depreciation expense, software licenses and office expenses.  | <sup>4</sup> Facility and other expenses primarily consists of rent expense, insurance premiums, depreciation expense, software licenses and office expenses.  |

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**Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.**

*The following discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes appearing elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, which was filed with the Securities and Exchange Commission ("SEC") on March 5, 2025 (the "Annual Report").*

*This Quarterly Report on Form 10-Q contains forward-looking statements that involve substantial risks and uncertainties. The words "anticipate," "believe," "estimate," "expect," "intend," "may," "plan," "predict," "project," "would" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. All statements addressing our future operating performance and development timelines that we expect or anticipate will occur in the future, as well as expectations for cash runway, are forward-looking statements. There are a number of important risks and uncertainties that could cause our actual results to differ materially from those indicated by forward-looking statements, including uncertainties inherent in the initiation and completion of pre-clinical studies and clinical development of our product candidates; availability and timing of results from pre-clinical studies; expectations for regulatory approvals to conduct trials or to market products and availability of funding sufficient for our foreseeable and unforeseeable operating expenses and capital expenditure requirements. These and other risks are described in greater detail in the Annual Report under the captions "Risk Factor Summary" and Part I, "Item 1A. Risk Factors," as updated by our subsequent filings with the SEC. We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments that we may make.*

*You should read this Quarterly Report on Form 10-Q and the documents that we have filed as exhibits to this Quarterly Report on Form 10-Q completely and with the understanding that our actual future results may be materially different from what we expect. The forward-looking statements contained in this Quarterly Report on Form 10-Q are made as of the date of this Quarterly Report on Form 10-Q, and we do not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.*

**Overview** 

We are a pioneering gene editing company dedicated to developing transformative genomic medicines to treat a broad range of serious diseases. We have developed a proprietary gene editing platform based on CRISPR technology and we continue to expand its capabilities. Our product development strategy is to target diseases where gene editing can be used to enable or enhance therapeutic outcomes for patients, while maximizing probability of technical, regulatory and commercial success. We are focused on the development of *in vivo* gene editing medicines utilizing functional upregulation, which aims to increase the expression and function of a normal gene copy and its normal protein function to treat diseases caused by genetic mutations that eliminate or disrupt normal function. We believe the ability to provide *in vivo* gene editing, in which the medicine is injected or infused into the patient to edit the cells inside their body, and functionally upregulate normal gene expression and normal protein function in the target tissues holds the potential to significantly expand the addressable therapeutic possibilities of CRISPR-based gene editing. To that end, our preclinical efforts are also focused on the creation of a "plug 'n play" lipid nanoparticle ("LNP") platform that enables delivery of the gene editing cargo to multiple cells and tissues, including the liver, hematopoietic stem cells ("HSCs"), and other cells and tissues.

In September 2025, we announced the nomination of our lead *in vivo* development candidate, EDIT-401, an experimental, potential best-in-class, one-time therapy to significantly reduce LDL-cholesterol ("LDL-C") through upregulation of the LDL receptor ("LDLR"). EDIT-401 is designed to treat hyperlipidemia by directly editing the LDLR gene to increase LDLR protein expression and reduce LDL-C levels. This targeted approach has demonstrated a favorable preclinical profile in both efficacy data and tolerability and supports the potential of EDIT-401 to deliver meaningful clinical outcomes for patients underserved by current lipid-lowering therapies. In October 2025, we reported *in vivo* preclinical proof-of-concept data for EDIT-401. In preclinical studies in non-human primates ("NHPs"), EDIT-401 achieved LDL-C reductions equal to or exceeding 90% within 48 hours of a single dose of EDIT-401. EDIT-401 also achieved LDL-C reductions equal to or exceeding 90% in mice with high baseline LDL-C and reduced LDLR function. The LDL-C reductions were achieved with an at least six-fold mean increase in LDLR protein in the NHP liver, requiring only approximately 10-40% functional editing of *LDLR* alleles in the liver. LDL-C reductions was maintained in mouse models in a three-month study, demonstrating the durability of effect. We plan to submit an investigational new drug

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application ("IND") or clinical trial application ("CTA") for EDIT-401 by mid-2026 with the goal of achieving initial *in vivo* human proof-of-concept data for EDIT-401 by the end of 2026.

We also previously demonstrated proof-of-concept of our functional upregulation strategy in our clinical trials of renizgamglogene autogedtemcel ("reni-cel"), an experimental *ex vivo* gene-edited medicine to treat sickle cell disease ("SCD") and transfusion-dependent beta thalassemia ("TDT"). Despite the robust and clinically meaningful improvements observed in these trials, we determined in December 2024 not to pursue commercialization for reni-cel in order to optimize our cost structure and accelerate our intent to achieve human proof of concept of our *in vivo* gene editing medicines. In January 2025, we announced *in vivo* preclinical proof of concept of editing HSCs in NHPs, and in June 2025 we shared new *in vivo* preclinical data demonstrating therapeutically relevant levels of HBG1/2 promoter editing in HSCs with a single dose of a novel targeted LNP in NHPs.

Our discovery and development efforts further include other cells and tissues. We previously announced *in vivo* delivery to two additional cell types in humanized mice using our proprietary LNP targeting platform. We additionally intend to continue work on optimizing candidates for our HSC program and to continue exploring other cell types and tissues for development, but plan to focus our resources on the advancement of our lead EDIT-401 program to human proof-of-concept.

We are pursuing the right combination of gene editing and targeted delivery tools through internal development and the in-licensing of complementary technologies to build our preclinical pipeline and accelerate the achievement of our goal of delivering lifesaving medicines to patients with previously untreatable diseases. Through in-licensing of complementary technologies, we can expand our existing gene editing platform and further drive the development of our *in vivo* pipeline. This was recently demonstrated with our entry in 2024 into a collaboration and license agreement to access LNPs targeting the liver, which we used in our achievement of *in vivo* editing of liver cells in NHPs. We also actively seek opportunities to out-license and partner our robust intellectual property portfolio to drive the development of CRISPR-based medicines in therapeutic areas outside of our core focus and to provide non-dilutive capital. For example, in cellular therapy medicines, we are leveraging partnerships to progress engineered cell medicines to treat various cancers, including in our collaboration with Bristol Myers Squibb Company ("BMS") through its wholly owned subsidiary, Juno Therapeutics, Inc. ("Juno Therapeutics"). This collaboration, which leverages our Cas9 and Cas12a platform technologies, seeks to advance alpha-beta T-cell experimental medicines for the treatment of solid and liquid tumors, and has resulted in 14 total programs to date.

In addition, in December 2023, we and Vertex Pharmaceuticals Incorporated ("Vertex") entered into a license agreement, under which Vertex obtained a non-exclusive license for our Cas9 gene editing technology for *ex vivo* gene editing medicines targeting the BCL11A gene in the fields of SCD and TDT, including Vertex's CASGEVY<sup>TM</sup> (exagamglogene autotemcel). We received a $50.0 million upfront cash payment in the fourth quarter of 2023 and the 2024 annual license fee of $10.0 million in the first quarter of 2024. The license agreement further provides for the payment by Vertex of a potential additional $50.0 million contingent upfront payment and further future fixed and sales-based annual license fees, ranging from $10.0 million to $40.0 million annually, inclusive of certain sales-based annual license fee increases, through 2034. We are required to pay The Broad Institute, Inc. ("Broad") and the President and Fellows of Harvard College ("Harvard") a mid-double-digit percentage of amounts payable to us from Vertex under the license agreement as it relates to Cas9 technology licensed by us from Broad and Harvard. In October 2024, we entered into an agreement (the "DRI Agreement") with a wholly owned subsidiary of DRI Healthcare Trust ("DRI") providing for an upfront cash payment by DRI to us of $57.0 million in exchange for the acquisition by DRI of up to 100% of certain of the annual license fees owed to us under the Vertex license agreement, which fees range from $5.0 million to $40.0 million per year (inclusive of certain sales-based annual license fees that may become due), and a mid-double-digit percentage of the $50.0 million contingent upfront payment, in each case after subtracting amounts owed by us to Broad and Harvard. We have retained rights to our portions of certain other sales-based annual license fees and the contingent upfront payment that may become due under the license agreement with Vertex, and the amounts that correspond to our licensor obligations.

Our operations to date have focused on organizing and staffing our company, business planning, raising capital, establishing our intellectual property portfolio, assembling our core capabilities in gene editing, seeking to identify potential product candidates, and undertaking preclinical studies and clinical trials. All of our ongoing research programs are still in the preclinical or research stage of development and the risk of failure of all of our research programs is high. We have not generated any revenue from product sales. We have primarily financed our operations through various equity financings, payments received under our research collaboration with BMS through its wholly owned subsidiary Juno Therapeutics, our former strategic alliance with Allergan Pharmaceuticals International Limited (together with its affiliates,

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"Allergan"), which was terminated in August 2020, payments received under the DRI Agreement in connection with our license agreement with Vertex, and payments under the Vertex license agreement.

We have incurred significant operating losses since inception. Our net losses were $154.4 million and $191.7 million for the nine months ended September 30, 2025 and 2024, respectively. As of September 30, 2025, we had an accumulated deficit of $1.6 billion. We expect to continue to incur significant expenses and operating losses for the foreseeable future. Our net losses may fluctuate significantly from quarter to quarter and from year to year. We anticipate that our expenses will increase as we continue our current research programs and our preclinical development activities; nominate development candidates and initiate clinical trials for our current preclinical programs; seek to identify additional research programs and additional product candidates; initiate preclinical testing for other product candidates we identify and develop; maintain, expand, and protect our intellectual property portfolio, including reimbursing our licensors for such expenses related to the intellectual property that we in-license from such licensors; further develop our gene editing platform; hire additional personnel; and incur additional costs associated with operating as a public company. We do not expect to be profitable for the year ending December 31, 2025 or the foreseeable future.

**Financial Operations Overview**

***Revenue***

To date, we have not generated any revenue from product sales, and we do not expect to generate any revenue from product sales for the foreseeable future. In connection with our collaboration with BMS, we have received an aggregate of $154.0 million in payments, which have primarily consisted of the initial upfront and amendment payments, development milestone payments, research funding support and certain opt-in fees. We no longer receive research funding support. During the three months ended September 30, 2025, we recognized $7.5 million of revenue related to our collaboration with BMS, none of which was previously deferred. We did not recognize any revenue related to our collaboration with BMS during the three months ended September 30, 2024. As of September 30, 2025, we had $50.2 million of deferred revenue in relation to our collaboration with BMS, all of which was classified as long-term deferred revenue on our consolidated balance sheet. Under this collaboration, we will recognize revenue upon delivery of option packages to BMS or upon receipt of development milestone payments. We expect that our revenue will fluctuate from quarter-to-quarter and year-to-year as a result of the timing of when we deliver such option packages or receive such milestone payments.

Pursuant to the license agreement with Vertex, we received a $50.0 million upfront cash payment in the fourth quarter of 2023 upon execution of the agreement and the 2024 and 2025 annual license fees of $10.0 million in each of the first quarters of 2024 and 2025. The license agreement further provides for the payment by Vertex of a potential additional $50.0 million contingent upfront payment and further annual license fees, ranging from $10.0 million to $40.0 million annually, inclusive of certain sales-based annual license fee increases, through 2034.

For additional information about our revenue recognition policy related to the Vertex license agreement and BMS collaboration, see Part II, "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Revenue Recognition" included in the Annual Report.

For the foreseeable future we expect substantially all of our revenue will be generated from our license agreement with Vertex, collaboration with BMS, and any other collaborations or license agreements we may enter into.

***Operating Expenses***

*Research and Development Expenses*

Research and development expenses consist primarily of costs incurred for our research, preclinical development, process and scale-up development, manufacture and clinical development of our product candidates, and the performance of development activities under our collaboration agreements. These costs are expensed as incurred and include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• employee-related expenses including salaries, benefits, and stock-based compensation expense;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs associated with our continued development of EDIT-401 as we progress EDIT-401 to IND or CTA submission;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs incurred as part of the discontinuation of our former reni-cel program;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs associated with conducting our other preclinical, process and scale-up development, manufacturing, quality, clinical and regulatory activities, including fees paid to third-party professional consultants, service providers and suppliers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs of purchasing lab supplies and non-capital equipment used in our preclinical activities and in manufacturing preclinical and clinical study materials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs incurred for the research and development activities under our collaboration agreements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• facility costs including rent, depreciation, and maintenance expenses; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• fees for acquiring and maintaining licenses under our third-party licensing agreements, including any sublicensing or success payments made to our licensors.

At this time, we cannot reasonably estimate or know the nature, timing, and estimated costs of the efforts that will be necessary to complete the development of any product candidates we may identify and develop. This is due to the numerous risks and uncertainties associated with developing such product candidates, including the uncertainty of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• successful completion of preclinical studies, IND-enabling studies and natural history studies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• successful initiation of, enrollment in, and completion of, clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• receipt of marketing approvals from applicable regulatory authorities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• establishing commercial manufacturing capabilities or making arrangements with third-party manufacturers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• obtaining and maintaining patent and trade secret protection and non-patent exclusivity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• launching commercial sales of a product, if and when approved, whether alone or in collaboration with others;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• acceptance of a product, if and when approved, by patients, the medical community, and third-party payors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• effectively competing with other therapies and treatment options;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a continued acceptable safety profile following approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• enforcing and defending intellectual property and proprietary rights and claims; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• achieving desirable medicinal properties for the intended indications.

A change in the outcome of any of these variables with respect to the development of any product candidates we develop would significantly change the costs, timing, and viability associated with the development of that product candidate.

Research and development activities are central to our business model. We expect research and development costs to increase for the foreseeable future as our development programs progress, including as we continue to support preclinical studies and prepare for the clinical development of our research programs.

*General and Administrative Expenses*

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation for personnel in executive, finance, investor relations, business development, legal, corporate affairs, information technology, facilities and human resource functions. Other significant costs include corporate facility costs not otherwise included in research and development expenses, legal fees related to intellectual property and corporate matters, and fees for accounting and consulting services.

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We anticipate that our general and administrative expenses will decrease or remain flat in the near future to support continued research and development activities. We anticipate that expenses associated with operating as a public company, including costs for audit, legal, regulatory, and tax-related services, director and officer insurance premiums, and investor relation costs will remain flat in the near future. With respect to reimbursement of third-party intellectual property-related expenses specifically, given the ongoing nature of the opposition and interference proceedings involving the patents licensed to us under our license agreement with Broad and Harvard, we anticipate general and administrative expenses associated with reimbursement of third-party intellectual property-related expense will continue to fluctuate as the opposition and interference proceedings continue.

*Restructuring and Impairment Charges*

In December 2024, our board of directors approved the discontinuation of the clinical development of our *ex vivo* reni-cel program (the "Discontinuation"). As part of the Discontinuation, our board approved a reduction in our employee workforce by approximately 180 positions, or by approximately 65% (the "Reduction"). Restructuring charges consist primarily of expenses in connection with the wind-down of various activities related to the clinical development of reni-cel, including contract termination costs, impairment charges and non-cash charges, and expenses related to the Reduction, primarily consisting of severance payments and employee benefit costs. We may also incur additional costs not currently contemplated due to events that may occur as a result of or that are associated with the Discontinuation and Reduction. We expect restructuring charges to be substantially incurred through the end of 2025, when the related activities are expected to be substantially complete.

*Other (Expense) Income, Net*

For the nine months ended September 30, 2025 and September 30, 2024, other (expense) income, net consisted primarily of interest income on cash and cash equivalents and interest accretion related to the liability for the sale of future revenues.

**Critical Accounting Policies and Estimates**

Our management's discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which have been prepared in accordance with United States generally accepted accounting principles. The preparation of our condensed consolidated financial statements requires us to make judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses, and the disclosure of contingent assets and liabilities in our condensed consolidated financial statements. We base our estimates on historical experience, known trends and events, and various other factors that we believe to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions. On an ongoing basis, we evaluate our judgments and estimates in light of changes in circumstances, facts, and experience. The effects of material revisions in estimates, if any, will be reflected in the condensed consolidated financial statements prospectively from the date of change in estimates.

During the nine months ended September 30, 2025, we had the following material change to our critical accounting estimates as described in Part II, "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates" in the Annual Report:

*Restructuring*

We record liabilities for costs associated with restructuring activities in the period in which the liability is incurred. Typical costs associated with restructuring activities include, employee termination benefits, contract termination costs and on-going contract costs for which there is no economic benefit. For costs associated with employee terminations in which the employee is subject to an existing benefit arrangement, the post-employment benefits are recognized when probable and estimable. Other employee termination costs are measured and recognized on the communication date, unless there is a required future service period, in which case, the expense is recognized over the service period. Contract termination costs are recognized upon termination of the contract and costs for on-going contracts for which there is no future benefit, are recognized at fair value on the cease-use date.

We have made estimates and judgments regarding the amount and timing of our restructuring expense and liability, including current and future period termination benefits and other exit costs to be incurred when related actions

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take place. Restructuring charges are reflected in our condensed consolidated statements of operations. Actual results may differ from these estimates.

**Results of Operations**

***Comparison of the Three Months ended September 30, 2025 and 2024***

The following table summarizes our results of operations for the three months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Collaboration and other research and development revenues | $7543 | $61 | $7482 | n/m |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development | 19775 | 47639 | (27864) | (58)% |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 12316 | 18088 | (5772) | (32)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Restructuring and impairment charges |  |  |  | 100% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 32091 | 65727 | (33636) | (51)% |
| Other (expense) income, net |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Other expense, net | (1) | (5) | 4 | (80)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest expense related to sale of future revenues | (2399) |  | (2399) | 100% |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest income, net | 1831 | 3530 | (1699) | (48)% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total other (expense) income, net | (569) | 3525 | (4094) | n/m |
| Net loss | $(25117) | $(62141) | $37024 | (60)% |

---

For our results of operations, we have included the respective percentage of changes, unless greater than 100% or less than (100)%, in which case we have denoted such changes as not meaningful (n/m).

*Collaboration and Other Research and Development Revenues*

Collaboration and other research and development revenues were $7.5 million for the three months ended September 30, 2025 compared to $0.1 million for the same period in 2024. The increase from the three months ended September 30, 2024 is primarily attributable to the recognition of revenue related to a milestone achieved in the third quarter of 2025 under our collaboration with BMS.

*Research and Development Expenses*

Research and development expenses decreased by $27.9 million to $19.8 million for the three months ended September 30, 2025 compared to $47.6 million for the same period in 2024. The following table summarizes our research and development expenses for the three months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Employee related expenses | $6468 | $14486 | $(8018) | (55)% |
| External research and development | 6465 | 20058 | (13593) | (68)% |
| Facility expenses | 3254 | 7229 | (3975) | (55)% |
| Stock-based compensation expenses | 634 | 2048 | (1414) | (69)% |
| Sublicense and license fees | 1292 | 307 | 985 | n/m |

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| | | | | |
|:---|:---|:---|:---|:---|
| Other expenses | 1662 | 3511 | (1849) | (53)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Total research and development expenses | $19775 | $47639 | $(27864) | (58)% |

---

The decrease in research and development expenses for the three months ended September 30, 2025 compared to the three months ended September 30, 2024 was primarily attributable to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $13.6 million in decreased external research and development expenses primarily resulting from reduced clinical and manufacturing costs due to the Discontinuation, partially offset by costs attributable to *in vivo* research and discovery;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $8.0 million in decreased employee-related expenses related to reduced headcount associated with the Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $4.0 million in decreased facility expense primarily due to the end of leases for manufacturing space;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $1.8 million in decreased other expenses related to professional services to support our reni-cel program due to the Discontinuation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $1.4 million in decreased stock-based compensation expense primarily related to reduction in the market price of our common stock year-over-year, resulting in a lower valuation of equity awards, along with reduced headcount as a result of the Reduction.

These decreases were partially offset by approximately $1.0 million in increased sublicense and license fees related to the achievement of certain milestones under our collaboration with BMS in the three months ended September 30, 2025 for which there was no similar activity in the three months ended September 30, 2024.

*General and Administrative Expenses*

General and administrative expenses decreased by $5.8 million to $12.3 million for the three months ended September 30, 2025 compared to $18.1 million for the three months ended September 30, 2024. The following table summarizes our general and administrative expenses for the three months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Three Months Ended<br>September 30,** | **Three Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Employee related expenses | $2491 | $5902 | $(3411) | (58)% |
| Professional service expenses | 1902 | 4121 | (2219) | (54)% |
| Intellectual property and patent related fees | 5279 | 3291 | 1988 | 60% |
| Stock-based compensation expenses | 1594 | 2754 | (1160) | (42)% |
| Facility and other expenses | 1050 | 2020 | (970) | (48)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Total general and administrative expenses | $12316 | $18088 | $(5772) | (32)% |

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The decrease in general and administrative expenses for the three months ended September 30, 2025 compared to the three months ended September 30, 2024 was primarily attributable to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $3.4 million in decreased employee related expenses related to reduced headcount associated with the Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $2.2 million in decreased professional service expenses related to reduced licensing and strategic business activities;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $1.2 million in decreased stock-based compensation expenses primarily related to reduction in the market price of our common stock year-over-year, resulting in a lower valuation of equity awards, along with reduced headcount as a result of the Reduction; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $1.0 million in decreased facility and other expenses related to the end of a lease.

These decreases were partially offset by approximately $2.0 million in increased intellectual property and patent related legal fees.

*Restructuring and Impairment Charges* 

During the three months ended September 30, 2025 and September 30, 2024, we recorded no expense related to restructuring and impairment, respectively, due to the Discontinuation and the Reduction.

*Other (Expense) Income, Net*

For the three months ended September 30, 2025, and September 30, 2024 other (expense) income, net was $(0.6) million and $3.5 million, respectively, which primarily relate to interest income and accretion of discounts and premiums associated with marketable securities and interest accretion related to the liability for the sale of future revenues. The decrease is attributable to interest accretion related to the DRI Purchase and Sale Agreement and reductions in investment income due to a decrease in our investments for the three months ended September 30, 2025 compared to the three months ended September 30, 2024.

***Comparison of the Nine Months ended September 30, 2025 and 2024***

The following table summarizes our results of operations for the nine months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Collaboration and other research and development revenues | $15779 | $1710 | $14069 | n/m |
| Operating expenses: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development | 62549 | 150636 | (88087) | (58)% |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 38550 | 55633 | (17083) | (31)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Restructuring and impairment charges | 66935 |  | 66935 | 100% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total operating expenses | 168034 | 206269 | (38235) | (19)% |
| Other (expense) income, net |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Other expense, net | (2184) |  | (2184) | 100% |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest expense related to sale of future revenues | (6635) |  | (6635) | 100% |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest income, net | 6634 | 12861 | (6227) | (48)% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total other (expense) income, net | (2185) | 12861 | (15046) | n/m |
| Net loss | $(154440) | $(191698) | $37258 | (19)% |

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*Collaboration and Other Research and Development Revenues*

Collaboration and other research and development revenues increased by $14.1 million to $15.8 million for the nine months ended September 30, 2025 compared to $1.7 million for the nine months ended September 30, 2024. The increase was primarily attributable to the recognition of the remaining deferred revenue upon the closing out of a collaboration agreement with a strategic partner, and the recognition of revenue related to specified deliverables under that collaboration agreement, as well as recognition of revenue related to a milestone achieved in the third quarter of 2025 under our collaboration with BMS.

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*Research and Development Expenses*

Research and development expenses decreased by $88.1 million to $62.5 million for the nine months ended September 30, 2025 compared to $150.6 million for the nine months ended September 30, 2024. The following table summarizes our research development expenses for the nine months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Employee related expenses | $25856 | $41830 | $(15974) | (38)% |
| External research and development expenses | 16530 | 64670 | (48140) | (74)% |
| Facility expenses | 12009 | 19818 | (7809) | (39)% |
| Stock-based compensation expenses | 2404 | 7081 | (4677) | (66)% |
| Sublicense and license fees | 1404 | 7060 | (5656) | (80)% |
| Other expenses | 4346 | 10177 | (5831) | (57)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Total research and development expenses | $62549 | $150636 | $(88087) | (58)% |

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The decrease in research and development expenses for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024 was primarily attributable to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $48.1 million in decreased external research and development expenses primarily resulting from reduced clinical and manufacturing costs due to the Discontinuation, partially offset by costs attributable to *in vivo* research and discovery;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $16.0 million in decreased employee-related expenses related to reduced headcount associated with the Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $7.8 million in decreased facility expenses primarily due to the end of leases for manufacturing space;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $5.8 million in decreased other expenses related to professional services to support our reni-cel program due to the Discontinuation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $5.7 million in decreased sublicense and license fees related to the achievement of certain milestones in the first quarter of 2024 for which there was no equivalent expense in 2025; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $4.7 million in decreased stock-based compensation expense primarily related to expense in connection with the achievement of certain performance-based vesting milestones for restricted stock units recognized in 2024 for which there was no equivalent expense in 2025, a reduction in the market price of our common stock year-over-year resulting in lower fair value and a reduction in headcount associated with the Reduction.

*General and Administrative Expenses*

General and administrative expenses decreased by $17.1 million to $38.6 million for the nine months ended September 30, 2025 compared to $55.6 million for the nine months ended September 30, 2024. The following table

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summarizes our general and administrative expenses for the nine months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Employee related expenses | $10065 | $15594 | $(5529) | (35)% |
| Professional service expenses | 7014 | 10929 | (3915) | (36)% |
| Intellectual property and patent related fees | 11836 | 11080 | 756 | 7% |
| Stock-based compensation expenses | 5467 | 10316 | (4849) | (47)% |
| Facility and other expenses | 4168 | 7714 | (3546) | (46)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Total general and administrative expenses | $38550 | $55633 | $(17083) | (31)% |

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The decrease in general and administrative expenses for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024 was primarily attributable to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $5.5 million in decreased employee related expenses related to reduced headcount associated with the Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $4.8 million in decreased stock-based compensation expense primarily related to expense in connection with the achievement of certain performance-based vesting milestones for restricted stock units recognized in 2024 for which there was no equivalent expense in 2025, a reduction in the market price of our common stock year-over-year resulting in lower fair value and a reduction in headcount associated with the Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $3.9 million in decreased professional service expenses related to reduced licensing and strategic business activities in 2025 relative to 2024; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approximately $3.5 million in decreased facility and other expense primarily related to the end of a lease.

The decreases were partially offset by approximately $0.8 million in increased intellectual property and patent related fees.

*Restructuring and Impairment Charges* 

Restructuring charges were $66.9 million for the nine months ended September 30, 2025, with no equivalent charges for the nine months ended September 30, 2024. The following table summarizes our restructuring charges for the nine months ended September 30, 2025 and 2024, together with the changes in those items in dollars (in thousands) and the respective percentages of change:

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| | | | | |
|:---|:---|:---|:---|:---|
| | **Nine Months Ended September 30,** | **Nine Months Ended September 30,** | **Dollar Change** | **Percentage Change** |
| | **2025** | **2024** | **Dollar Change** | **Percentage Change** |
| Employee termination benefits | $4322 | $— | $4322 | 100% |
| Costs for ongoing contracts and terminated contracts | 52341 |  | 52341 | 100% |
| Acceleration of expense for change in useful life estimate and lease termination | 6548 |  | 6548 | 100% |
| Impairment charges | 3724 |  | 3724 | 100% |
| &nbsp;&nbsp;&nbsp;Total restructuring and impairment charges | $66935 | $— | $66935 | 100% |

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During the nine months ended September 30, 2025, we recorded $4.3 million, $52.3 million, $6.5 million and $3.7 million related to employee termination benefits, reni-cel-related contract costs, acceleration in expense due to changes in

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useful life estimates for leasehold improvements, software and a right of use asset, and impairment charges, respectively, due to the Discontinuation and the Reduction.

*Other (Expense) Income, Net*

For the nine months ended September 30, 2025 and September 30, 2024, other (expense) income, net was $(2.2) million and $12.9 million, respectively, which primarily relates to interest income and accretion of discounts and premiums associated with marketable securities and interest accretion related to the liability for the sale of future revenues. The decrease for the nine months ended September 30, 2025 is attributable to the interest accretion related to the liability for the sale of future revenues and reductions in investment income due to a decrease in our investments.

**Liquidity and Capital Resources**

***Sources of Liquidity***

As of September 30, 2025, we have raised an aggregate of $1.0 billion in net proceeds through the sale of shares of our common stock in public offerings and at-the-market offerings. We also have funded our business from our research collaboration with BMS through its wholly owned subsidiary Juno Therapeutics, our former strategic alliance with Allergan (which was terminated in August 2020), payments received under the DRI Agreement in connection with our license agreement with Vertex, and payments under the Vertex license agreement. As of September 30, 2025, we had cash, cash equivalents and marketable securities of $165.6 million.

In May 2021, we entered into a common stock sales agreement with TD Securities (USA) LLC (as successor to Cowen and Company, LLC) ("TD Cowen"), under which we from time to time can issue and sell shares of our common stock through TD Cowen in at-the-market offerings for aggregate gross sale proceeds of up to $300.0 million. We amended the common stock sales agreement with TD Cowen in February 2024 in connection with filing a new registration statement. In March 2025, we further amended our common stock sales agreement with TD Cowen in connection with amending our existing shelf registration statement following the loss of our status as a "well-known seasoned issuer" (as defined under Rule 405 of the Securities Act of 1933, as amended), reducing the amount of shares of common stock we may issue and sell through TD Cowen to aggregate gross sale proceeds of up to $150.0 million (the "ATM Facility"). As of September 30, 2025, we have sold 9,925,250 shares of our common stock under the ATM Facility at a weighted average price of $2.66 per share for aggregate gross proceeds of $26.4 million and have $123.6 million of shares of our common stock remaining available for issuance and sale under the ATM Facility. As of November 10, 2025, the issuance date of the condensed consolidated financial statements, we have sold an incremental 4,327,483 shares of our common stock under the ATM Facility at a weighted average price of $4.00 per share for gross proceeds of $17.3 million and have $106.3 million of shares of our common stock remaining available for issuance and sale under the ATM Facility.

In addition to our existing cash, cash equivalents and marketable securities, we are eligible to earn milestone and other payments under our collaboration with BMS and our other collaboration and license agreements. Our ability to earn applicable milestone and other payments and the timing of earning these amounts are dependent upon the timing and outcome of development, regulatory and commercial activities and, as such, are uncertain at this time. As of September 30, 2025, our right to contingent payments under our collaboration agreement with BMS, as well as the retained portions of the contingent upfront payment and other amounts under our license agreement with Vertex, are our only significant committed potential external source of funds.

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*Cash Flows*

The following table provides information regarding our cash flows for the nine months ended September 30, 2025 and 2024 (in thousands):

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| | | |
|:---|:---|:---|
| | **Nine Months Ended<br>September 30,** | **Nine Months Ended<br>September 30,** |
| | **2025** | **2024** |
| Net cash (used in) provided by: |  |  |
| Operating activities | $(128854) | $(159522) |
| Investing activities | 138610 | 131188 |
| Financing activities | 23144 | 514 |
| Net increase (decrease) in cash, cash equivalents, and restricted cash | $32900 | $(27820) |

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*Net Cash Used in Operating Activities*

The use of cash in all periods resulted primarily from our net losses adjusted for non-cash charges and changes in components of working capital.

Net cash used in operating activities was approximately $128.9 million for the nine months ended September 30, 2025, which primarily consisted of operating expenses that related to our ongoing research and pre-clinical efforts, the wind-down of clinical and manufacturing activities in support of our former reni-cel program, and supporting business operations.

Net cash used in operating activities was approximately $159.5 million for the nine months ended September 30, 2024, which primarily consisted of operating expenses that related to increasing our research efforts, the focused progression of clinical and manufacturing activities in support of our former reni-cel program, and supporting business operations.

*Net Cash Provided by Investing Activities*

Net cash provided by investing activities was approximately $138.6 million for the nine months ended September 30, 2025, primarily related to the proceeds from the maturities of marketable securities of $139.0 million and proceeds from the sale of property and equipment of $0.2 million, partially offset by the purchase of property and equipment of $0.5 million.

Net cash provided by investing activities was approximately $131.2 million for the nine months ended September 30, 2024, primarily related to the proceeds from the maturities of marketable securities of $225.7 million, and partially offset by the purchase of marketable securities of $86.2 million and the purchase of property and equipment of $8.3 million.

*Net Cash Provided by Financing Activities*

Net cash provided by financing activities was approximately $23.1 million for the nine months ended September 30, 2025, primarily related to net proceeds from the issuance of common stock from our at-the-market offering program of $25.8 million and proceeds received from issuance of common stock under our employee stock purchase plan of $0.2 million. This was partially offset by the repayment of our liability for the sale of future revenues with DRI of $2.9 million.

Net cash provided by financing activities was approximately $0.5 million for the nine months ended September 30, 2024, related to the proceeds received from issuance of common stock under our employee stock purchase plan of $0.3 million and exercises of options for our common stock of $0.2 million.

***Funding Requirements***

We expect our expenses to increase for the foreseeable future as our development programs progress, including as we continue to support preclinical studies and prepare for the clinical development of EDIT-401; seek to identify product candidates and additional research programs; initiate preclinical testing and clinical trials for other product candidates we

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identify and develop; maintain, expand, and project our intellectual property portfolio, including reimbursing our licensors for expenses related to the intellectual property that we in-license from such licensors; and incur costs associated with operating as a public company. In addition, if we obtain marketing approval for any product candidate that we identify and develop, we expect to incur significant commercialization expenses related to product sales, marketing, manufacturing, and distribution to the extent that such sales, marketing, and distribution are not the responsibility of a collaborator. We do not expect to generate significant recurring revenue unless and until we obtain regulatory approval for and commercialize a product candidate. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on attractive terms, we would be forced to delay, reduce, or eliminate our research and development programs or future commercialization efforts.

We expect that our existing cash and cash equivalents on September 30, 2025, together with the proceeds of sales of shares of common stock under our ATM Facility after September 30, 2025 through the date of this report and the retained portions of the payments payable under our license agreement with Vertex, will enable us to fund our operating expenses and capital expenditure requirements into the third quarter of 2027. Our forecast of the period of time through which our existing cash and cash equivalents and investments will be adequate to support our operations is a forward-looking statement and involves significant risks and uncertainties. We have based this forecast on assumptions that may prove to be wrong, and actual results could vary materially from our expectations, which may adversely affect our capital resources and liquidity. We could utilize our available capital resources sooner than we currently expect. The amount and timing of future funding requirements, both near- and long-term, will depend on many factors, including, but not limited to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the restructuring costs associated with the Discontinuation and Reduction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope, progress, results, and costs of drug discovery, preclinical development, laboratory testing, and any clinical or natural history study trials for product candidates we develop;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs of preparing, filing, and prosecuting patent applications, maintaining and enforcing our intellectual property and proprietary rights, and defending intellectual property-related claims;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs, timing, and outcome of regulatory review of the product candidates we develop;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs of establishing and maintaining a supply chain for the development and manufacture of our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs of future activities, including product sales, medical affairs, marketing, manufacturing, and distribution, for any product candidates for which we receive regulatory approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the success of our collaboration with BMS, including whether BMS exercises any of its options to extend the research program term and/or to additional research programs under our collaboration;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to establish and maintain additional collaborations on favorable terms, if at all;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the extent to which we acquire or in-license other medicines and technologies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs of reimbursing our licensors for the prosecution and maintenance of the patent rights in-licensed by us; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to establish and maintain healthcare coverage and adequate reimbursement for any product candidates for which we receive regulatory approval.

Identifying potential product candidates and conducting preclinical studies and clinical trials is a time-consuming, expensive, and uncertain process that takes many years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, even if we successfully identify and develop product candidates that are approved, we will require significant additional amounts in order to launch and commercialize our product candidates and may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of genomic medicines that we do not expect to be commercially available for many years, if at all. Accordingly, we will need to continue to rely on additional financing to achieve our business objectives. Adequate additional financing may not be available to us on acceptable terms, or at all.

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Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of equity offerings, debt financings, collaborations, strategic alliances, and licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, our stockholders' ownership interests will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our stockholders. Debt financing, if available, would result in increased fixed payment obligations and may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures, or declaring dividends.

If we raise funds through additional collaborations, strategic alliances, or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs, or product candidates or to grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce, or terminate our product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

**Contractual Obligations**

As of September 30, 2025, we had operating leases with future minimum lease payments for a total of $22.4 million, of which $2.0 million will be payable in 2025. These minimum lease payments exclude our share of the facility operating expenses, real-estate taxes, and other costs that are reimbursable to the landlord under the leases.

In 2023, we entered into a license and service agreement pursuant to which we leased manufacturing space for our continued research and development activities. The lease commenced April 1, 2024. In September 2024, we modified the lease, and as a result of the modification the lease payments decreased and the notification period for the termination of the license and service agreement increased from 12 months' prior written notice to 18 months' prior written notice. In January 2025, we gave our termination notice on the license and service agreement, which resulted in the end of the term of the agreement being July 2026, and $8.9 million of remaining payments owed. In April 2025, we modified the lease to terminate on April 30, 2025 with a final fixed payment of $3.7 million.

Our agreements with certain institutions to license intellectual property include potential milestone payments and success fees, sublicense fees, royalty fees, licensing maintenance fees, and reimbursement of patent maintenance costs that we may be required to pay. Our agreements to license intellectual property include potential milestone payments that are dependent upon the development of products using the intellectual property licensed under the agreements and contingent upon the achievement of development or regulatory approval milestones, as well as commercial milestones. These potential obligations are contingent upon future events and the timing and likelihood of such potential obligations are not known with certainty. For further information regarding these agreements, please see Part I, "Item 1. Business—Our Collaborations and Licensing Strategy" in the Annual Report.

We also enter into contracts in the normal course of business with contract research organizations, contract manufacturing organizations and other vendors to assist in the performance of our research and development activities and other services and products for operating purposes. These contracts generally provide for termination at any time upon prior notice.

**Item 3. Quantitative and Qualitative Disclosures About Market Risk.**

We are exposed to market risk related to changes in interest rates. As of September 30, 2025, we had cash and cash equivalents of $165.6 million, primarily held in money market mutual funds. Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because our investments, including cash equivalents, are in the form, or may be in the form of, money market funds or marketable securities and are or may be invested in U.S. Treasury and U.S. government agency obligations. Due to the short-term maturities and low risk profiles of our investments, an immediate 100 basis point change in interest rates would not have a material effect on the fair market value of our investments.

While we contract with certain vendors and institutions internationally, substantially all of our total liabilities as of September 30, 2025 were denominated in the United States dollar and we believe that we do not have any material exposure to foreign currency exchange rate risk.

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**Item 4. Controls and Procedures.**

**Evaluation of Disclosure Controls and Procedures**

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of September 30, 2025. The term "disclosure controls and procedures," as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), means controls and other procedures of a company that are designed to ensure that information required to be disclosed by the company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company's management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Our management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of September 30, 2025, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

**Changes in Internal Control over Financial Reporting**

There were no changes in our internal control over financial reporting that occurred during the period covered by this Quarterly Report on Form 10-Q that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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**PART II. OTHER INFORMATION**

**Item 1. Legal Proceedings.**

From time to time, we may become involved in litigation or other legal proceedings relating to claims arising from the ordinary course of business. There can be no assurance that any proceedings that result from these third-party actions will be resolved in our favor. In addition, if they are not resolved in our favor, there can be no assurance that the result will not have a material adverse effect on our business, financial condition, results of operations, or prospects. Certain of our intellectual property rights, including ones licensed to us under our licensing agreements, are subject to, and from time to time may be subject to, priority and validity disputes. For additional information regarding these matters, see Part I, "Item 1A. Risk Factors—Risks Related to Our Intellectual Property" in our Annual Report on Form 10-K for the year ended December 31, 2024 (the "Annual Report"). Regardless of outcome, litigation or other legal proceedings can have an adverse impact on us because of defense and settlement costs, diversion of management resources, and other factors.

**Item 1A. Risk Factors.** 

Information set forth in this Quarterly Report on Form 10-Q, including below, and in the sections entitled "Summary of Risk Factors" and Part I, "Item 1A. Risk Factors" in the Annual Report, includes risks which could materially affect our business, financial condition, results of operations, or prospects. These risks, as well as other risks and uncertainties, could materially and adversely affect our business, results of operations and financial condition, which in turn could materially and adversely affect the trading price of shares of our common stock. Additional risks not currently known to us or that we currently deem to be immaterial may also harm our business.

***Some of our in-licensed patents are subject to priority and validity disputes. In addition, our owned and in-licensed patents, patent applications and other intellectual property may be subject to further priority and validity disputes, and other similar intellectual property proceedings including inventorship disputes. If we or our licensors are unsuccessful in any of these proceedings, we may be required to obtain licenses from third parties, which may not be available on commercially reasonable terms or at all, or to cease the development, manufacture, and commercialization of one or more of the product candidates we develop, which could have a material adverse impact on our business.***

Certain U.S. patents and a U.S. patent application directed to CRISPR/Cas9 that are co-owned by the Broad Institute and the Massachusetts Institute of Technology ("MIT"), and in some cases Harvard (collectively referred to as "Broad"), and in-licensed by us were involved in a first interference with a U.S. patent application that is co-owned by the University of California, the University of Vienna, and Emmanuelle Charpentier (collectively referred to "CVC"). An interference is a proceeding in USPTO before the Patent Trial and Appeal Board of the USPTO ("PTAB") to determine priority of invention of the subject matter of patent claims filed by different parties. In this first interference, the PTAB made a judgment of no interference-in-fact in favor of the Broad, which was upheld on appeal. This decision was final and bars any further interference between the same parties for claims to the same invention that was considered in the interference. As a result of this decision, the U.S. patents and application that we in-license from the Broad and others were not modified or revoked.

On June 24, 2019, the PTAB declared a second interference between certain pending U.S. patent applications that are co-owned by CVC and certain U.S. patents and a U.S. patent application that are co-owned by Broad and in-licensed by us. Most of the Broad U.S. patents and the patent application that are involved in the second interference were also part of the first interference. The invention that was considered in the first interference related to a method involving contacting a target DNA in a eukaryotic cell with certain defined CRISPR/Cas9 components for the purpose of cleaving or editing that target DNA molecule or modulating transcription of at least one gene encoded thereon. The second interference is directed to a different invention, namely a eukaryotic cell comprising a target DNA and certain defined CRISPR/Cas9 components including a single molecule guide RNA that are capable of cleaving or editing the target DNA molecule.

On September 10, 2020, the PTAB granted Broad's motion for priority benefit while denying CVC priority benefit to their two earliest provisional patent applications. As a result, Broad entered the priority phase of the interference as "Senior Party" while CVC remained the "Junior Party" for purposes of determining which entity was the first to invent the inventions at issue. On February 28, 2022, the PTAB issued a decision regarding the priority phase of the interference determining that Broad was the first entity to invent the claims at issue. This decision was appealed by CVC and the Broad cross-appealed. On May 12, 2025, the U.S. Court of Appeals for the Federal Circuit ("CAFC") affirmed-in-part and vacated-in-part the PTAB's previous decision and remanded it back to the PTAB for further review. This decision does not impact our ability to grant licenses or change existing licenses we have to certain issued U.S. patents and a U.S. patent

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application that are co-owned by Broad and in-licensed by us. It is uncertain when or in what manner the PTAB will ultimately render a decision.

On December 14, 2020, the PTAB, declared two new interferences involving a pending U.S. patent application that is owned by ToolGen, Inc. (the "ToolGen application"). One of the two interferences is between the ToolGen application and certain U.S. patents and U.S. patent applications that are co-owned by Broad and in-licensed by us. Most of the Broad U.S. patents and patent applications that are involved in the interference with ToolGen are also part of the second interference with CVC. The other ToolGen interference is between the same ToolGen application and the U.S. patent applications that are co-owned by CVC and involved in the second interference with Broad. The claims in ToolGen's patent application relate to a mammalian cell with a CRISPR/Cas system comprising a codon optimized nucleic acid encoding a Cas9 polypeptide with a nuclear localization signal and a single-molecule guide RNA that, together, are capable of forming a Cas9/RNA complex that mediates double stranded cleavage of a target nucleic acid sequence. On September 28, 2022, the PTAB suspended both of these interferences until the U.S. Court of Appeals for the Federal Circuit issues a mandate in the pending appeals related to the second interference between Broad and CVC.

On June 21, 2021, the PTAB declared two new interferences involving a pending U.S. patent application owned by Sigma-Aldrich (the "Sigma-Aldrich application"). One of the two new interferences is between the Sigma-Aldrich application and certain U.S. patents and U.S. patent applications that are co-owned by Broad and in-licensed by us. The other Sigma interference is between the same Sigma-Aldrich application and the U.S. patent applications that are co-owned by CVC. Most of the Broad U.S. patents and patent applications that are involved in the interference with Sigma-Aldrich are also part of the concurrent interferences with CVC and ToolGen. The claims in Sigma-Aldrich's application relate to a method for modifying a chromosomal sequence in a eukaryotic cell by integrating a donor sequence into that chromosomal sequence. These methods use a CRISPR/Cas9 system comprising a Cas9 polypeptide with a nuclear localization signal, a guide RNA, and a donor sequence that, together, are capable of mediating double stranded cleavage and repair of a target nucleic acid sequence leading to integration of the donor sequence into the chromosomal sequence. On December 14, 2022, the PTAB suspended both of these interferences until the U.S. Court of Appeals for the Federal Circuit issues a mandate in the pending appeals related to the second interference between Broad and CVC.

As a result of these declarations of interference, five parallel adversarial proceedings in the USPTO before the PTAB have been initiated – the patent interferences between Broad and CVC, Broad and ToolGen, CVC and ToolGen, Broad and Sigma-Aldrich, and CVC and Sigma-Aldrich. We cannot predict with any certainty how long each interference proceeding will take. It is also possible that other third parties may seek to become a party to these interferences.

Our owned and in-licensed patents and patent applications are, or may in the future become, subject to validity disputes in the USPTO and other foreign patent offices. For example, a request for ex parte re-examination was filed with the USPTO on February 16, 2016 against a U.S. patent that we have in-licensed from Broad, which is involved in certain of the interferences. The request for ex parte re-examination was granted on May 9, 2016 thereby initiating a re-examination procedure between the USPTO and Broad, acting on behalf of itself and MIT. The PTAB has suspended the re-examination noting that it has jurisdiction over any file that involves a patent involved in an interference. It is uncertain when the PTAB will lift the suspension. If Broad is unsuccessful during the re-examination, the patent in question may be revoked or narrowed, which could have a material adverse effect on the scope of our rights under such patent.

We or our licensors may also be subject to claims that former employees, collaborators, or other third parties have an interest in our owned or in-licensed patents or patent applications, or other intellectual property rights as an inventor or co-inventor. If we are unable to obtain an exclusive license to any such third-party co-owners' interest in such patents, patent applications or other intellectual property rights, such co-owners may be able to license their rights to other third parties, including our competitors. In addition, we may need the cooperation of any such co-owners to enforce any patents, including any patents that issue from patent applications, against third parties, and such cooperation may not be provided to us. Any of the foregoing could have a material adverse effect on the conduct of our business, financial condition, results of operations, and prospects.

We or our licensors are subject to and may in the future become a party to similar proceedings or priority disputes in Europe or other foreign jurisdictions. For example, certain European patents that we have in-licensed from Broad have been revoked in their entirety by the European Patent Office Opposition Division (the "Opposition Division"). Certain other European patents that we have in-licensed from Broad were maintained with amended patent claims. Certain of these decisions have been appealed by both Broad and the opposing party(s), and it is uncertain when or in what manner the Boards of Appeal will act on these appeals. The Opposition Division has also initiated opposition proceedings against certain other European patents that we have in-licensed from Broad. The European Patent Office opposition proceedings

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may involve issues including, but not limited to, procedural formalities related to filing the European patent application, priority, and the patentability of the involved claims. In view of certain arguments made by the third parties against the revoked patents and similar arguments made by the third parties against other in-licensed European patents under opposition, the opposition proceedings may lead to the revocation of certain additional in-licensed European patents. The loss of priority for, or the loss of, these European patents could have a material adverse effect on the conduct of our business. One or more of the third parties that have filed oppositions against these European patents or other third parties may file future oppositions against other European patents that we in-license or own. There may be other oppositions against these European patents that have not yet been filed or that have not yet been made available to the public.

If we or our licensors are unsuccessful in any patent related disputes, including interference proceedings, patent oppositions, re-examinations, or other priority, inventorship, or validity disputes to which we or they are subject (including any of the proceedings discussed above), we may lose valuable intellectual property rights through the loss of one or more patents owned or licensed or our owned or licensed patent claims may be narrowed, invalidated, or held unenforceable. In addition, if we or our licensors are unsuccessful in any inventorship disputes to which we or they are subject, we may lose valuable intellectual property rights, such as exclusive ownership of, or the exclusive right to use, our owned or in-licensed patents and patent applications. If we or our licensors are unsuccessful in any interference proceeding or other priority or inventorship dispute, we may be required to obtain and maintain licenses from third parties, including parties involved in any such interference proceedings or other priority or inventorship disputes. Such licenses may not be available on commercially reasonable terms or may be non-exclusive or may not be available at all. If we are unable to obtain and maintain such licenses, we may need to cease the development, manufacture, and commercialization of one or more of the product candidates we develop. The loss of exclusivity or the narrowing of our owned and in-licensed patent claims could limit our ability to stop others from using or commercializing similar or identical technology and products. Any of the foregoing could result in a material adverse effect on our business, financial condition, results of operations, or prospects. Even if we are successful in any interference proceeding or other priority, inventorship, or validity disputes, it could result in substantial costs and be a distraction to our management and other employees.

**Item 5. Other Information.**

*Director and Officer Trading Arrangements*

A portion of the compensation of our directors and officers (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) is in the form of equity awards and, from time to time, directors and officers may engage in open-market transactions with respect to the securities acquired pursuant to such equity awards or other of our securities, including to satisfy tax withholding obligations when equity awards vest or are exercised, and for diversification or other personal reasons.

Transactions in our securities by directors and officers are required to be made in accordance with our insider trading policy, which requires that the transactions be in accordance with applicable U.S. federal securities laws that prohibit trading while in possession of material nonpublic information. Rule 10b5-1 under the Exchange Act provides an affirmative defense that enables directors and officers to prearrange transactions in our securities in a manner that avoids concerns about initiating transactions while in possession of material nonpublic information.

None of our directors or officers adopted or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement (each as defined in Item 408(c) of Regulation S-K) during the quarterly period covered by this report.

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**Item 6. Exhibits** 

Exhibit Index

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| | |
|:---|:---|
| **Exhibit<br>Number** | **Description of Exhibit** |
| 31.1\* | <u>[Rule 13a-14(a) Certification of Principal Executive Officer](edit-20250930xex311.htm)</u> |
| 31.2\* | <u>[Rule 13a-14(a) Certification of Principal Financial Officer](edit-20250930xex312.htm)</u> |
| 32.1+ | <u>[Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. §1350](edit-20250930xex321.htm)</u> |
| 101\* | The following financial statements from the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, formatted in Inline XBRL (eXtensible Business Reporting Language): (i) Condensed Consolidated Balance Sheets (unaudited), (ii) Condensed Consolidated Statements of Operations (unaudited), (iii) Condensed Consolidated Statements of Comprehensive Loss (unaudited), (iv) Condensed Consolidated Statements of Stockholders' Equity (unaudited), (v) Condensed Consolidated Statements of Cash Flows (unaudited) and (vi) Notes to Condensed Consolidated Financial Statements (unaudited), tagged as blocks of text and including detailed tags. |
| 104\* | Cover Page Interactive Data File (Embedded within the Inline XBRL document and included in Exhibit 101) |

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\*Filed herewith

+&nbsp;&nbsp;&nbsp;&nbsp;The certifications furnished in Exhibit 32.1 that accompany this Quarterly Report on Form 10-Q are not deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended. Such certifications are not to be deemed to be incorporated by reference into any filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except to the extent that the registrant specifically incorporates them by reference.

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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| | | |
|:---|:---|:---|
| | **EDITAS MEDICINE, INC.** | **EDITAS MEDICINE, INC.** |
| Dated: November 10, 2025 | By: | /s/ Amy Parison |
|  |  | Amy Parison |
|  |  | Chief Financial Officer<br>(Principal Financial Officer) |

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## Exhibit 31.1

**Exhibit 31.1**

**CERTIFICATIONS**

I, Gilmore O'Neill, certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.I have reviewed this Quarterly Report on Form 10-Q of Editas Medicine, Inc.;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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| | | |
|:---|:---|:---|
| Date: November 10, 2025 | By: | /s/ Gilmore O'Neill |
|  |  | Gilmore O'Neill<br>Chief Executive Officer |
|  |  | (Principal Executive Officer) |

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## Exhibit 31.2

**Exhibit 31.2**

**CERTIFICATIONS**

I, Amy Parison, certify that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.I have reviewed this Quarterly Report on Form 10-Q of Editas Medicine, Inc.;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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| | | |
|:---|:---|:---|
| Date: November 10, 2025 | By: | /s/ Amy Parison |
|  |  | Amy Parison<br>Chief Financial Officer |
|  |  | (Principal Financial Officer) |

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## Exhibit 32.1

**Exhibit 32.1**

**CERTIFICATIONS OF CEO AND CFO PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with this Quarterly Report on Form 10-Q of Editas Medicine, Inc. (the "Company") for the period ended September 30, 2025, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned officers of the Company hereby certifies, pursuant to 18 U.S.C. (section) 1350, as adopted pursuant to (section) 906 of the Sarbanes-Oxley Act of 2002, that to the best of her or his knowledge:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

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| | | |
|:---|:---|:---|
| Date: November 10, 2025 | By: | /s/ Gilmore O'Neill |
|  |  | Gilmore O'Neill |
|  |  | Chief Executive Officer |
| Date: November 10, 2025 | By: | /s/ Amy Parison |
|  |  | Amy Parison |
|  |  | Chief Financial Officer |

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