# EDGAR Filing Document

**Accession Number:** 0001652130
**File Stem:** 0001193125-25-250757
**Filing Date:** 2025-10
**Character Count:** 17577
**Document Hash:** e3e2319cd36c408ffcf67c0a4ebaac11
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-250757.hdr.sgml**: 20251027

**ACCESSION NUMBER**: 0001193125-25-250757

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251027

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251027

**DATE AS OF CHANGE**: 20251027

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Intellia Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001652130
- **STANDARD INDUSTRIAL CLASSIFICATION:** IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 364785571
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37766
- **FILM NUMBER:** 251417523

**BUSINESS ADDRESS:**
- **STREET 1:** 40 ERIE STREET
- **STREET 2:** SUITE 130
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
- **BUSINESS PHONE:** 857-285-6200

**MAIL ADDRESS:**
- **STREET 1:** 40 ERIE STREET
- **STREET 2:** SUITE 130
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 OR 15(d)

#### of The Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): October 27, 2025

## INTELLIA THERAPEUTICS, INC.

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

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-37766** | **36-4785571** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **40 Erie Street, Suite 130** |  |
| **Cambridge, Massachusetts** | **02139** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (857) 285-6200

#### Not Applicable

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| Common Stock (Par Value $0.0001) | NTLA | The Nasdaq Global Market |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

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. ☐

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---

| | |
|:---|:---|
| **Item 7.01** | **Regulation FD Disclosure.**  |

---

On October 27, 2025, Intellia Therapeutics, Inc. (the "Company or "Intellia") issued a press release titled "Intellia Therapeutics Provides Update on MAGNITUDE Clinical Trials of Nexiguran Ziclumeran (nex-z)." A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated into this Item 7.01 by reference.

The information in this Item 7.01, including Exhibit 99.1, is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

---

| | |
|:---|:---|
| **Item 8.01.** | **Other Events.**  |

---

On October 27, 2025, the Company announced it has temporarily paused dosing and screening in the MAGNITUDE and MAGNITUDE-2 Phase 3 clinical trials for nexiguran ziclumeran ("nex-z").

The MAGNITUDE trial is a randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of nex-z in adults with transthyretin ("ATTR") amyloidosis with cardiomyopathy ("ATTR-CM"). The MAGNITUDE-2 trial is a randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of nex-z in adults with hereditary ATTR amyloidosis with polyneuropathy ("ATTRv-PN").

This action follows a report on October 24, 2025 of Grade 4 liver transaminases and increased total bilirubin in a patient who was dosed with nex-z in the MAGNITUDE trial on September 30, 2025, meeting the trial's protocol-defined pausing criteria.

As of today, more than 650 patients with ATTR-CM are enrolled in MAGNITUDE, and 47 patients with ATTR-PN are enrolled in MAGNITUDE-2. Over 450 of these patients are estimated to have been dosed with nex-z.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits

---

| | |
|:---|:---|
| Exhibit<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No.  | Description |
| 99.1 | [Press Release dated October 27, 2025 titled "Intellia Therapeutics Provides Update on MAGNITUDE Clinical Trials of Nexiguran Ziclumeran (nex-z)"](d44351dex991.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

#### Forward-Looking Statements
This current report on Form 8-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. The words "may," "will," "could," "would," "should," "expect," "plan," "anticipate," "intend," "believe," "estimate," "predict," "project," "potential," "continue," "target" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. These forward-looking statements include, but are not limited to, express or implied statements regarding Intellia's beliefs and expectations regarding: the safety, tolerability, efficacy, success and advancement of its clinical programs for "nex-z" (also known as NTLA-2001), including the ability to resume and successfully complete its MAGNITUDE and MAGNITUDE-2 trials for nex-z. Any forward-looking statements in this current report on Form 8-K are based on management's current expectations and beliefs of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. These risks and uncertainties include, but are not

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limited to: uncertainties related to Intellia's ability to resume the MAGNITUDE and MAGNITUDE-2 trials, the implications of this event on the safety and efficacy of nex-z and further development of nex-z; regulatory agencies' evaluation of regulatory filings and other information related to our product candidates, including nex-z; uncertainties related to the authorization, initiation and conduct of studies and other development requirements for our product candidates, including uncertainties related to regulatory approvals to conduct clinical trials; the risk that any one or more of Intellia's product candidates, including nex-z, will not be successfully developed and commercialized; risks related to Intellia's ability to protect and maintain its intellectual property position; risks related to valid third party intellectual property; risks related to Intellia's relationship with third parties, including its licensors and licensees; risks related to the ability of its licensors to protect and maintain their intellectual property position; the risk that the results of preclinical studies or clinical studies will not be predictive of future results in connection with future studies for the same product candidate or Intellia's other product candidates; and risks related to Intellia's reliance on collaborations, including that its collaboration with Regeneron Pharmaceuticals, Inc. will not continue or will not be successful. For a discussion of these and other risks and uncertainties, and other important factors, any of which could cause Intellia's actual results to differ from those contained in the forward-looking statements, see the section entitled "Risk Factors" in Intellia's most recent annual report on Form 10-K and quarterly report on Form 10-Q, as well as discussions of potential risks, uncertainties, and other important factors in Intellia's other filings with the Securities and Exchange Commission. All information in this current report on Form 8-K is as of the date of the report, and Intellia undertakes no duty to update this information unless required by law.

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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 hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | Intellia Therapeutics, Inc. | Intellia Therapeutics, Inc. |
|  |  | (Registrant) |
| Date: October 27, 2025 | By: | /s/ John M. Leonard |
|  |  | Name: John M. Leonard |
|  |  | Title: Chief Executive Officer and President |

---

## Exhibit 99.1

**Exhibit 99.1**![LOGO](g44351dsp6.jpg)

**Intellia Therapeutics Provides Update on MAGNITUDE Clinical Trials of** 

**Nexiguran Ziclumeran (nex-z)** 

Conference call today at 8:30 a.m. ET

CAMBRIDGE, Mass., Oct. 27, 2025 – Intellia Therapeutics, Inc. (NASDAQ:NTLA), a leading clinical-stage gene editing company focused on revolutionizing medicine with CRISPR-based therapies, today announced that the company has temporarily paused patient dosing and screening for its MAGNITUDE and MAGNITUDE-2 Phase 3 clinical trials of nex-z for patients with transthyretin amyloidosis with cardiomyopathy (ATTR-CM) and polyneuropathy (ATTR-PN), respectively.

This action follows a report on October 24, 2025 of Grade 4 liver transaminases and increased total bilirubin in a patient who was dosed with nex-z in the MAGNITUDE trial on September 30, 2025, meeting the trial's protocol-defined pausing criteria. The patient was hospitalized, is being closely monitored and is receiving medical intervention. Intellia is consulting with experts, considering potential risk mitigation strategies and engaging with regulatory authorities.

"In line with our commitment to patient safety, we have taken immediate action to temporarily pause enrollment in MAGNITUDE and MAGNITUDE-2 as we investigate this recent event," said Intellia President and Chief Executive Officer John Leonard, M.D. "As we focus on ensuring the health of this patient, we also are engaging with regulatory authorities and other stakeholders globally to develop a strategy to resume enrollment as soon as appropriate."

As of today, more than 650 patients with ATTR-CM are enrolled in MAGNITUDE, and 47 patients with ATTR-PN are enrolled in MAGNITUDE-2. Over 450 of these patients are estimated to have been dosed with nex-z.

Page 1 of 3 intelliatx.com

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**Conference Call Information** 

The company will host a conference call and webcast today at 8.30 a.m. ET to discuss this update. To join the webcast, please visit the Events and Presentations page of the Investors & Media section on Intellia's website at intelliatx.com. To join by phone, U.S. callers should dial 1-833-316-0545 and international callers should dial 1-412-317-5726, approximately five minutes before the call. All participants should ask to be connected to the Intellia Therapeutics conference call. A replay of the webcast will be available at intelliatx.com for approximately 90 days.

**About Nex-z** 

Based on Nobel Prize-winning CRISPR/Cas9 gene editing technology, nex-z has the potential to become the first one-time treatment for transthyretin (ATTR) amyloidosis with cardiomyopathy (ATTR-CM) and/or polyneuropathy (ATTR-PN). Nex-z is designed to inactivate the TTR gene that encodes for the transthyretin (TTR) protein and is currently being investigated in MAGNITUDE and MAGNITUDE-2, Phase 3 clinical trials in ATTR-CM and ATTR-PN, respectively. Interim Phase 1 clinical data showed the administration of nex-z led to consistent, deep and long-lasting TTR reduction. Nex-z has received an Orphan Drug and RMAT Designation from the U.S. Food and Drug Administration (FDA) and an Orphan Drug Designation (ODD) from the European Commission. Intellia leads development and commercialization of nex-z as part of a multi-target discovery, development and commercialization collaboration with Regeneron Pharmaceuticals, Inc.

**About Intellia Therapeutics** 

Intellia Therapeutics, Inc. (NASDAQ:NTLA) is a leading clinical-stage gene editing company focused on revolutionizing medicine with CRISPR-based therapies. Since its inception, Intellia has focused on leveraging gene editing technology to develop novel, first-in-class medicines that address important unmet medical needs and advance the treatment paradigm for patients. Intellia's deep scientific, technical and clinical development experience, along with its people, is helping set the standard for a new class of medicine. To harness the full potential of gene editing, Intellia continues to expand the capabilities of its CRISPR-based platform with novel editing and delivery technologies. Learn more at intelliatx.com and follow us @intelliatx.

**Forward-Looking Statements** 

This press release contains "forward-looking statements" of Intellia Therapeutics, Inc. ("Intellia" or the "Company") within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, express or implied statements regarding Intellia's beliefs and expectations regarding: the safety, tolerability, efficacy, success and advancement of its clinical programs for "nex-z" (also known as NTLA-2001), including the ability to resume and successfully complete its MAGNITUDE and MAGNITUDE-2 trials for nex-z.

Any forward-looking statements in this press release are based on management's current expectations and beliefs of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to: uncertainties related to Intellia's ability to resume the MAGNITUDE and MAGNITUDE-2 trials, the implications of this event on the safety and efficacy of nex-z and

Page 2 of 3 intelliatx.com

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further development of nex-z; regulatory agencies' evaluation of regulatory filings and other information related to our product candidates, including nex-z; uncertainties related to the authorization, initiation and conduct of studies and other development requirements for our product candidates, including uncertainties related to regulatory approvals to conduct clinical trials; the risk that any one or more of Intellia's product candidates, including nex-z, will not be successfully developed and commercialized; risks related to Intellia's ability to protect and maintain its intellectual property position; risks related to valid third party intellectual property; risks related to Intellia's relationship with third parties, including its licensors and licensees; risks related to the ability of its licensors to protect and maintain their intellectual property position; the risk that the results of preclinical studies or clinical studies will not be predictive of future results in connection with future studies for the same product candidate or Intellia's other product candidates; and risks related to Intellia's reliance on collaborations, including that its collaboration with Regeneron Pharmaceuticals, Inc. will not continue or will not be successful. For a discussion of these and other risks and uncertainties, and other important factors, any of which could cause Intellia's actual results to differ from those contained in the forward-looking statements, see the section entitled "Risk Factors" in Intellia's most recent annual report on Form 10-K and quarterly report on Form 10-Q, as well as discussions of potential risks, uncertainties, and other important factors in Intellia's other filings with the Securities and Exchange Commission. All information in this press release is as of the date of the release, and Intellia undertakes no duty to update this information unless required by law.

***Intellia Contacts:***

**Investors:** 

Jason Fredette

Vice President, Investor Relations and Corporate Communications

Intellia Therapeutics, Inc.

jason.fredette@intelliatx.com

**Media:**

Matt Crenson

Ten Bridge Communications

media@intelliatx.com

mcrenson@tenbridgecommunications.com

\# \# \#

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