# EDGAR Filing Document

**Accession Number:** 0001690585
**File Stem:** 0001193125-23-088185
**Filing Date:** 2023-3
**Character Count:** 22356
**Document Hash:** 79c0ccdcbe6aea75a39ac294106c9776
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-088185.hdr.sgml**: 20230331

**ACCESSION NUMBER**: 0001193125-23-088185

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20230331

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**ITEM INFORMATION**: Material Modifications to Rights of Security Holders

**ITEM INFORMATION**: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20230331

**DATE AS OF CHANGE**: 20230331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Magenta Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001690585
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38541
- **FILM NUMBER:** 23788486

**BUSINESS ADDRESS:**
- **STREET 1:** 100 TECHNOLOGY SQUARE
- **STREET 2:** 5TH FLOOR
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
- **BUSINESS PHONE:** 857-201-2700

**MAIL ADDRESS:**
- **STREET 1:** 100 TECHNOLOGY SQUARE
- **STREET 2:** 5TH FLOOR
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139

?xml version="1.0" encoding="utf-8" ? 8-K

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

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### FORM 8-K

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#### CURRENT REPORT

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

#### of The Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): March 31, 2023

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## MAGENTA THERAPEUTICS, INC.

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

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| | | |
|:---|:---|:---|
| **Delaware** | **001-38541** | **81-0724163** |
| **(State or other jurisdiction<br>of incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer**<br> **Identification No.)** |

---

#### 100 Technology Square

#### Cambridge, Massachusetts 02139

#### (Address of principal executive offices) (Zip Code)

#### Registrant's telephone number, including area code: (857) 242-0170

#### Not Applicable

#### (Former name or former address, if changed since last report)

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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 (<u>see</u> General Instruction A.2. below):

☐ 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:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>symbol(s)** | **Name of each exchange<br>on which registered** |
| Common Stock, $0.001 par value | MGTA | The Nasdaq Global Market |
| Preferred Stock Purchase Rights |  | The Nasdaq Global Market |

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

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 1.01. Entry into a Material Definitive Agreement.
On March 31, 2023, the Board of Directors of Magenta Therapeutics, Inc. (the "Company") adopted a stockholder rights plan, as set forth in the Stockholder Rights Agreement, dated March 31, 2023, between the Company and Computershare Trust Company, N.A., as Rights Agent (the "Rights Agreement"). The following description of the terms of the Rights Agreement does not purport to be complete and is qualified in its entirety by reference to the Rights Agreement, which is included as Exhibit 4.1 and is incorporated herein by reference.

Pursuant to the terms of the Rights Agreement, the Board of Directors declared a dividend distribution of one Preferred Stock Purchase Right (a "Right") for each outstanding share of common stock, par value $0.001 per share, of the Company (the "Common Stock"), to stockholders of record as of the close of business on April 11, 2023 (the "Record Date"). In addition, one Right will automatically attach to each share of Common Stock issued between the Record Date and the earlier of the Distribution Date (as defined below) and the expiration date of the Rights. Each Right entitles the registered holder thereof to purchase from the Company a unit consisting of one ten-thousandth of a share (a "Unit") of Series A Junior Participating Cumulative Preferred Stock, par value $0.001 per share, of the Company (the "Preferred Stock") at a cash exercise price of $3.75 per Unit (the "Exercise Price"), subject to adjustment, under certain conditions specified in the Rights Agreement and summarized below.

Initially, the Rights are not exercisable and are attached to and trade with all shares of Common Stock outstanding as of, and issued subsequent to, the Record Date. The Rights will separate from the Common Stock and will become exercisable upon the earlier of (i) the close of business on the tenth calendar day following the first public announcement that a person or group of affiliated or associated persons (an "Acquiring Person") has acquired beneficial ownership of 10% or more of the outstanding shares of Common Stock, other than as a result of repurchases of stock by the Company or certain inadvertent actions by a stockholder (the date of such announcement being referred to as the "Stock Acquisition Date"), or (ii) the close of business on the tenth business day (or such later day as the Board of Directors may determine) following the commencement of a tender offer or exchange offer that could result upon its consummation in a person or group becoming an Acquiring Person (the earlier of such dates being herein referred to as the "Distribution Date"). A person or group who beneficially owned 10% or more of the Company's outstanding Common Stock prior to the first public announcement by the Company of the adoption of the Rights Agreement will not trigger the Rights Agreement so long as they do not acquire beneficial ownership of any additional shares of Common Stock at a time when they still beneficially own 10% or more of such Common Stock, subject to certain exceptions as set forth in the Rights Agreement.

For purposes of the Rights Agreement, beneficial ownership is defined to include ownership of securities that are subject to a derivative transaction and acquired derivative securities. Swaps dealers unassociated with any control intent or intent to evade the purposes of the Rights Agreement are excepted from such imputed beneficial ownership.

In the event that a Stock Acquisition Date occurs, proper provision will be made so that each holder of a Right (other than an Acquiring Person or its associates or affiliates, whose Rights shall become null and void) will thereafter have the right to receive upon exercise, in lieu of a number of shares of Preferred Stock, that number of shares of Common Stock of the Company (or, in certain circumstances, including if there are insufficient shares of Common Stock to permit the exercise in full of the Rights, Units of Preferred Stock, other securities, cash or property, or any combination of the foregoing) having a market value of two times the Exercise Price of the Right (such right being referred to as the "Subscription Right"). In the event that, at any time following the Stock

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Acquisition Date, (i) the Company consolidates with, or merges with and into, any other person, and the Company is not the continuing or surviving corporation, (ii) any person consolidates with the Company, or merges with and into the Company and the Company is the continuing or surviving corporation of such merger and, in connection with such merger, all or part of the shares of Common Stock are changed into or exchanged for stock or other securities of any other person or cash or any other property, or (iii) 50% or more of the Company's assets or earning power is sold, mortgaged or otherwise transferred, each holder of a Right (other than an Acquiring Person or its associates or affiliates, whose Rights shall become null and void) will thereafter have the right to receive, upon exercise, common stock of the acquiring company having a market value equal to two times the Exercise Price of the Right (such right being referred to as the "Merger Right"). The holder of a Right will continue to have the Merger Right whether or not such holder has exercised the Subscription Right. Rights that are or were beneficially owned by an Acquiring Person may (under certain circumstances specified in the Rights Agreement) become null and void.

The Rights may be redeemed in whole, but not in part, at a price of $0.001 per Right (payable in cash, Common Stock or other consideration deemed appropriate by the Board of Directors) by the Board of Directors only until the earlier of (i) the time at which any person becomes an Acquiring Person or (ii) the expiration date of the Rights Agreement. Immediately upon the action of the Board of Directors ordering redemption of the Rights, the Rights will terminate and thereafter the only right of the holders of Rights will be to receive the redemption price.

The Rights Agreement may be amended by the Board of Directors in its sole discretion at any time prior to the time at which any person becomes an Acquiring Person. After such time the Board of Directors may, subject to certain limitations set forth in the Rights Agreement, amend the Rights Agreement only to cure any ambiguity, defect or inconsistency, to shorten or lengthen any time period, or to make changes that do not adversely affect the interests of Rights holders (excluding the interests of an Acquiring Person or its associates or affiliates).

Until a Right is exercised, the holder will have no rights as a stockholder of the Company (beyond those as an existing stockholder), including the right to vote or to receive dividends. While the distribution of the Rights will not be taxable to stockholders or to the Company, stockholders may, depending upon the circumstances, recognize taxable income in the event that the Rights become exercisable for shares of Common Stock, other securities of the Company, other consideration or for common stock of an acquiring company.

The Rights are not exercisable until the Distribution Date and will expire at the close of business on March 30, 2024, unless previously redeemed or exchanged by the Company.

The Rights Agreement provides the holders of the Common Stock with the ability to exempt an offer to acquire, or engage in another business combination transaction involving, the Company that is deemed a "Qualifying Offer" (as defined in the Rights Agreement) from the terms of the Rights Agreement. A Qualifying Offer is, in summary, an offer determined by a majority of the independent members of the Board to have specific characteristics that are generally intended to preclude offers that are coercive, abusive or highly contingent. Among those characteristics are that it be: (i) a fully financed all-cash tender offer or an exchange offer offering shares of common stock of the offeror, or a combination thereof, for any and all of the Common Stock; and (ii) an offer that is otherwise in the best interests of the Company's stockholders. The Rights Agreement provides additional characteristics necessary for an acquisition offer to be deemed a "Qualifying Offer," including if the consideration offered in a proposed transaction is stock of the acquiror.

Pursuant to the Rights Agreement, if the Company receives a Qualifying Offer and the Board has not redeemed the outstanding Rights or exempted such Qualifying Offer from the terms of the Rights Agreement or called a special meeting of stockholders (the "Special Meeting") for the purpose of voting on whether to exempt such Qualifying Offer from the terms of the Rights Agreement, in each case by the end of the 90 business day period following the commencement of such Qualifying Offer, provided such offer remains a Qualifying Offer during such period, the holders of 10% of the Common Stock may request that the Board call a Special Meeting to vote on a resolution authorizing the exemption of the Qualifying Offer from the terms of the Rights Agreement. If such a Special Meeting is not held by the 90th business day following the receipt of such a request from stockholders to call a Special Meeting, the Qualifying Offer will be deemed exempt from the terms of the Rights Agreement on the 10th business day thereafter.

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#### Item 3.03. Material Modification to Rights of Security Holders.
The information in response to Item 1.01 is incorporated by reference in response to this Item 3.03.

#### Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.
In connection with the adoption of the Rights Agreement described in Item 1.01 above, the Board of Directors of the Company approved a Certificate of Designations of Series A Junior Participating Cumulative Preferred Stock (the "Certificate of Designations"). The Certificate of Designations will be filed with the Secretary of State of Delaware on March 31, 2023. The Certificate of Designations is included as Exhibit 3.1 and is incorporated herein by reference. The description of the Series A Junior Participating Cumulative Preferred Stock in Item 1.01 is incorporated herein by reference.

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#### Item 8.01. Other Events.
On March 31, 2023, the Company issued a press release announcing the adoption of the Rights Agreement. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.

#### Item 9.01. Financial Statements and Exhibits.
(d) Exhibits

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| | |
|:---|:---|
| Exhibit No. | Description |
| 3.1 | [Certificate of Designations of Series A Junior Participating Cumulative Preferred Stock of Magenta Therapeutics, Inc. classifying and designating the Series A Junior Participating Cumulative Preferred Stock, filed as Exhibit 3.1 to the Company's Registration Statement on Form 8-A on March 31, 2023 and incorporated herein by reference](http://www.sec.gov/Archives/edgar/data/1690585/000119312523088078/d432235dex31.htm) |
| 4.1 | [Stockholder Rights Agreement, dated as of March 31, 2023, between Magenta Therapeutics, Inc. and Computershare Trust Company, N.A., as Rights Agent, filed as Exhibit 4.1 to the Company's Registration Statement on Form 8-A on March 31, 2023 and incorporated herein by reference](http://www.sec.gov/Archives/edgar/data/1690585/000119312523088078/d432235dex41.htm) |
| 99.1 | [Press Release issued by Magenta Therapeutics, Inc. dated March 31, 2023](d436260dex991.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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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.

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| | | |
|:---|:---|:---|
| | Magenta Therapeutics, Inc. | Magenta Therapeutics, Inc. |
| Date: March 31, 2023 | By: | /s/ Stephen Mahoney |
|  |  | Stephen Mahoney |
|  |  | President, Chief Financial and Operating Officer |

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## Exhibit 99.1

**Exhibit 99.1**![LOGO](g436260g0331023958527.jpg)

**Magenta Therapeutics Adopts Limited Duration Stockholder Rights Plan** 

Cambridge, MA – March 31, 2023 – Magenta Therapeutics, Inc. (Nasdaq: MGTA) ("Magenta" or the "Company") today announced that its Board of Directors (the "Board") has unanimously adopted a limited duration stockholder rights plan (the "Rights Plan"). The Rights Plan will give the Board sufficient time to conduct its previously announced comprehensive review of strategic alternatives focused on maximizing shareholder value. The Rights Plan has been adopted in order to protect the best interests of the Company and its shareholders, help ensure that all interested parties have the opportunity to participate fairly in the strategic review process, and provide the Board and shareholders time to make informed decisions. The Rights Plan is also intended to reduce the likelihood that any person or group gains control of the Company through open market accumulations or other tactics and reduce the likelihood that actions are taken by third parties that are not in the best interests of the Company and all of its shareholders.

The Rights Plan applies equally to all current and future shareholders and is not intended to deter offers or preclude the Board from considering offers that are fair and otherwise in the best interests of all the Company's shareholders.

The Rights Plan provides several recognized shareholder protections, such as the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Rights Plan will expire in one year, at the close of business on March 30, 2024.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Rights Plan has an exception for offers made for all shares of the Company that treat all shareholders
equally, including a qualifying offer clause that provides stockholders the ability to call a special meeting for purposes of exempting a "qualifying offer."

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Rights Plan does not contain any dead-hand, slow-hand, no-hand or
similar feature that would limit the ability of a future Board to redeem the rights.

**Additional Information on Stockholder Rights Plan** 

The Rights Plan is similar to plans adopted by other publicly traded companies. Pursuant to the Rights Plan, Magenta declared a dividend distribution of one preferred stock purchase right for each outstanding share of the Company's common stock, par value $0.001 per share (the "Common Stock"), to stockholders of record as of the close of business on April 11, 2023 (the "Record Date"). In addition, one right will automatically attach to each share of Common Stock issued between the Record Date and the earlier of the distribution date and the expiration date of the rights. Each right entitles the registered holder thereof to purchase from the Company a unit consisting of one ten-thousandth of a share (a "Unit") of Series A Junior Participating Cumulative Preferred Stock, par value $0.001 per share, of the Company (the "Preferred Stock") at a cash exercise price of $3.75 per Unit, subject to adjustment, under certain conditions specified in the Rights Plan and summarized below.

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The rights will become exercisable if an entity, person or group acquires beneficial ownership of 10% or more of the Company's outstanding Common Stock. In the event that the rights become exercisable due to the triggering ownership threshold being crossed, each right will entitle its holder (other than the person, entity or group triggering the Rights Plan, whose rights will become void and will not be exercisable) to receive shares of Common Stock having a market value equal to two times the exercise price of the right. In the event of a merger or similar change of control of the Company, each right will entitle its holder (other than the person, entity or group triggering the Rights Plan, whose rights will become void and will not be exercisable) to receive shares of common stock of the acquiring company having a market value equal to two times the exercise price of the right.

Under the Rights Plan, any person, entity or group that currently owns more than the triggering percentage may continue to own its shares of Common Stock but may not acquire any additional shares of Common Stock, or form a group with another owner of Common Stock, without triggering the Rights Plan.

A copy of the Rights Plan and a summary of its terms will be filed on a Form 8-K with the Securities and Exchange Commission.

**Advisors** 

Goodwin Procter LLP is serving as legal counsel for Magenta and Houlihan Lokey, Inc. is serving as financial advisor.

**Forward-Looking Statements** 

This press release contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995, as amended. These statements include, without limitation, implied and express statements relating to the anticipated benefits and expected consequences of the rights plan that Magenta has adopted. Words such as "anticipate," "believe," "continue," "could," "designed," "endeavor," "estimate," "expect," "intend," "may," "might," "plan," "potential," "predict," "project," "seek," "should," "target," "preliminary," "will," "would" and similar expressions are intended to identify forward-looking statements. The express or implied forward-looking statements included in this press release are based on current expectations, are only predictions and are subject to a number of risks, uncertainties and assumptions that could cause actual results to differ materially from those indicated, including, without limitation, the effectiveness of the rights plan in providing the Board of Directors with time to make informed decisions that are in the best long-term interests of Magenta and its stockholders. These and other risks are described in additional detail in Magenta's Annual Report on Form 10-K for the fiscal year ended December 31, 2022 and its other filings made with the Securities and Exchange Commission from time to time. Any forward-looking statements contained in this press release represent Magenta's views only as of today and should not be relied upon as representing its views as of any subsequent date. Magenta explicitly disclaims any obligation to update any forward-looking statements, except to the extent required by law.

**Contact:** 

<u>investor@magentatx.com</u>