# EDGAR Filing Document

**Accession Number:** 0001117003
**File Stem:** 0001415889-25-019573
**Filing Date:** 2025-7
**Character Count:** 7369
**Document Hash:** 26fb2005921f4e15dedd3d9716f9059d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001415889-25-019573.hdr.sgml**: 20250709

**ACCESSION NUMBER**: 0001415889-25-019573

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250707

**FILED AS OF DATE**: 20250709

**DATE AS OF CHANGE**: 20250709

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** MCGUIRE TERRANCE
- **CENTRAL INDEX KEY:** 0001117003

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39747
- **FILM NUMBER:** 251113709

**MAIL ADDRESS:**
- **STREET 1:** C/O POLARIS VENTURE PARTNERS LP
- **STREET 2:** 1000 WINTER STREET, SUITE 3350
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02154
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Seer, Inc.
- **CENTRAL INDEX KEY:** 0001726445
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 821153150
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3800 BRIDGE PARKWAY, SUITE 102
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94065
- **BUSINESS PHONE:** 650-453-0000

**MAIL ADDRESS:**
- **STREET 1:** 3800 BRIDGE PARKWAY, SUITE 102
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94065

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Seer Biosciences, Inc.
- **DATE OF NAME CHANGE:** 20171226

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>MCGUIRE TERRANCE<br><sub>(Last) (First) (Middle)</sub><br>C/O SEER, INC.<br>3800 BRIDGE PARKWAY<br><sub>(Street)</sub><br>REDWOOD CITY, CA 94065<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-07-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Seer, Inc. [ SEER ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A Common Stock | 2025-07-07 |  | A |  | 20500<sup>(1)</sup> | A | $0 | 112066 | D |  |
| Class A Common Stock |  |  |  |  |  |  |  | 210982 | I | See footnote<sup>(2)</sup> |
| Class A Common Stock |  |  |  |  |  |  |  | 78947 | I | See footnote<sup>(3)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Option (right to buy) | $2.18 | 2025-07-07 |  | A |  | 30500 |  | <sup>(4)</sup> | 2035-07-07 | Class A Common Stock | 30500 | $0 | 30500 | D |  |

---

### Footnotes:

(1) The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

(2) The reported shares are held of record by Strong Bridge, LLC for which the Reporting Person serves as an operating manager.

(3) The reported shares are held of record by Polaris Founders Capital Fund I, L.P. ("PFCF I"). Polaris Founders Capital Management Co. I, L.L.C. ("PFCM"), is the general partner of PFCF I. The Reporting Person and Jonathan A. Flint ("Flint") are the managing members of PFCM. Each of the Reporting Person and Flint in their respective capacities with respect to PFCM may be deemed to have shared voting and dispositive power with respect to the shares held by PFCF I. Each of PFCM, Flint, and the Reporting Person disclaims beneficial ownership of securities held by PFCF I, and this report shall not be deemed an admission that the Reporting Person, Flint, or PFCM is the beneficial owner of these securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

(4) Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

**Signature:** /s/ David Horn, by power of attorney  
**Date:** 2025-07-09

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**