# EDGAR Filing Document

**Accession Number:** 0001609809
**File Stem:** 0001193125-23-002405
**Filing Date:** 2023-1
**Character Count:** 5539
**Document Hash:** 0fe74193815ecdd79623fb017c045e37
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-002405.hdr.sgml**: 20230105

**ACCESSION NUMBER**: 0001193125-23-002405

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20230104

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**FILED AS OF DATE**: 20230105

**DATE AS OF CHANGE**: 20230105

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Seres Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001609809
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 274326290
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37465
- **FILM NUMBER:** 23511494

**BUSINESS ADDRESS:**
- **STREET 1:** 200 SIDNEY STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
- **BUSINESS PHONE:** 617 945 9626

**MAIL ADDRESS:**
- **STREET 1:** 200 SIDNEY STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Seres Health, Inc.
- **DATE OF NAME CHANGE:** 20140603

?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):January 4, 2023

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## SERES THERAPEUTICS, INC.

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

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| | | |
|:---|:---|:---|
| **Delaware** | **001-37465** | **27-4326290** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification No.)** |

---

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| | |
|:---|:---|
| **200 Sidney Street - 4th Floor** |  |
| **Cambridge, MA** | **02139** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

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#### Registrant's telephone number, including area code: (617) 945-9626

#### 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 (see 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, par value $0.001 per share | MCRB | The Nasdaq Stock Market LLC<br>(Nasdaq Global Select 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 (§ 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 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On January 4, 2023, the Board of Directors (the "Board") of Seres Therapeutics, Inc. (the "Company") increased its size to provide for a total of ten directors authorized to serve on the Board and appointed Claire Fraser, Ph.D. as a Class II director of the Company. Dr. Fraser has been appointed to serve on the Audit Committee of the Board (the "Audit Committee").

Dr. Fraser will participate in the Company's standard compensation program for non-employee directors, including an annual retainer of $45,000, an annual retainer for service on the Audit Committee of $10,000 and an initial award of an option to purchase 48,000 shares of the Company's common stock (the "Initial Award"). The Initial Award has an exercise price equal to $5.47, the closing price per share of the Company's common stock on the date of grant, and will vest and become exercisable in equal installments on each of the first four anniversaries of the date of grant or in full immediately prior to the occurrence of a change in control, subject to continued service on the Board through each such vesting date.

Dr. Fraser has also entered into the Company's standard indemnification agreement for directors and officers.

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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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| | | |
|:---|:---|:---|
|  | SERES THERAPEUTICS, INC. | SERES THERAPEUTICS, INC. |
| Date: January 5, 2023 | By: | /s/ Thomas J. DesRosier |
|  | Name: | Thomas J. DesRosier |
|  | Title: | Executive Vice President and Chief Legal Officer |

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