# EDGAR Filing Document

**Accession Number:** 0001726445
**File Stem:** 0000921895-26-000574
**Filing Date:** 2026-3
**Character Count:** 20839
**Document Hash:** ace1e41bc243ffbd0e8514beebb9a84c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000921895-26-000574.hdr.sgml**: 20260302

**ACCESSION NUMBER**: 0000921895-26-000574

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260302

**DATE AS OF CHANGE**: 20260302

**SUBJECT COMPANY**: 

**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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-91912
- **FILM NUMBER:** 26709437

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Radoff Bradley Louis
- **CENTRAL INDEX KEY:** 0001380585

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 2727 KIRBY DRIVE
- **STREET 2:** UNIT 29L
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77098

## Ex-2

Exhibit 2

**<u>Transactions in the Securities of the Issuer Since the Filing of the Schedule 13D</u>**

---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;<u>Nature of the Transaction</u> | &nbsp;&nbsp; Amount of Securities<br> <u>Purchased/(Sold)</u> | &nbsp;&nbsp;<u>Price ($)</u> | &nbsp;&nbsp; Date of<br> <u>Purchase/Sale</u> |

---

**<u>BRADLEY L. RADOFF</u>**

Purchase of Common Stock 500,000 2.0339 02/20/2026 <br> Purchase of Common Stock 10,232 1.7799 02/26/2026

**<u>JEC II ASSOCIATES, LLC</u>**

Purchase of Common Stock 117,296 2.0000 02/26/2026

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**Seer, Inc.**

*(Name of Issuer)*

**Class A Common Stock, par value $0.00001 per share**

*(Title of Class of Securities)*

**81578P106**

*(CUSIP Number)*

**BRADLEY L. RADOFF**<br>2727 Kirby Drive, Unit 29L<br>Houston TX 77098<br>713-482-2196

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**02/26/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Radoff Family Foundation** | Name of reporting person<br>**Radoff Family Foundation** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**TEXAS** | Citizenship or place of organization<br>**TEXAS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**500000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**500000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**500000.00** | Aggregate amount beneficially owned by each reporting person<br>**500000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.9%** | Percent of class represented by amount in Row (11)<br>**0.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Radoff Bradley Louis** | Name of reporting person<br>**Radoff Bradley Louis** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**2110232.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**500000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**2110232.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**500000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**2610232.00** | Aggregate amount beneficially owned by each reporting person<br>**2610232.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**4.6%** | Percent of class represented by amount in Row (11)<br>**4.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JEC II Associates, LLC** | Name of reporting person<br>**JEC II Associates, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1167296.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**1167296.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1167296.00** | Aggregate amount beneficially owned by each reporting person<br>**1167296.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**2.1%** | Percent of class represented by amount in Row (11)<br>**2.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**The MOS Trust** | Name of reporting person<br>**The MOS Trust** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**WYOMING** | Citizenship or place of organization<br>**WYOMING** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**215000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**215000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**215000.00** | Aggregate amount beneficially owned by each reporting person<br>**215000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.4%** | Percent of class represented by amount in Row (11)<br>**0.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**MOS PTC, LLC** | Name of reporting person<br>**MOS PTC, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**WYOMING** | Citizenship or place of organization<br>**WYOMING** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**215000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**215000.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**215000.00** | Aggregate amount beneficially owned by each reporting person<br>**215000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.4%** | Percent of class represented by amount in Row (11)<br>**0.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **81578P106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Torok Michael** | Name of reporting person<br>**Torok Michael** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**285000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**1382296.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**285000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**1382296.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1667296.00** | Aggregate amount beneficially owned by each reporting person<br>**1667296.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**3.0%** | Percent of class represented by amount in Row (11)<br>**3.0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A Common Stock, par value $0.00001 per share

**(b) Name of Issuer:**
Seer, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
3800 BRIDGE PARKWAY, SUITE 102, REDWOOD CITY, CA, 94065

**Item 4. Purpose of Transaction**

Item 4 is hereby amended to add the following:

The Reporting Persons are deeply concerned by the Board's recent decision to adopt the tax benefits preservation plan, dated February 26, 2026 (the "NOL Pill"), which the Reporting Persons believe was designed to insulate the current Board and to deter or gain an unfair advantage in any potential proxy contest. The Reporting Persons believe that the NOL Pill was implemented in order to thwart stockholders from acquiring 4.9% or more of the Shares, despite the Board's purported tax-related justifications. In the Reporting Persons' view, the NOL Pill is simply a means to prevent stockholders from gaining too much voting power in the event of a potential proxy contest given the fact that the Board adopted the NOL Pill only six days after the Reporting Persons filed the initial Schedule 13D.

We specifically call on the Board to provide stockholders with evidence justifying the adoption of the draconian NOL Pill and prove that it is not just another entrenchment device. For starters, how close is the Issuer to experiencing an "ownership change," as defined in Section 382 of the Internal Revenue Code of 1986, as amended?

As a reminder, this is the same Board that sought to delay the conversion of the Issuer's Class B common stock, which were primarily held by the Issuer's CEO and provided 10 votes per share, for five years, and only abandoned such plan after being informed that it would violate Nasdaq's listing standards.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5(a) is hereby amended and restated to read as follows:

The aggregate percentage of Shares reported owned by each person named herein is based on 56,219,599 Shares outstanding as of December 31, 2025, which is the total number of Shares outstanding as disclosed in Exhibit 99.1 to the Issuer's Current Report on Form 8-K filed with the Securities and Exchange Commission on February 26, 2026.

As of the date hereof, the Radoff Foundation directly beneficially owned 500,000 Shares, constituting approximately 0.9% of the Shares outstanding.

As of the date hereof, Mr. Radoff directly beneficially owned 2,110,232 Shares, constituting approximately 3.8% of the Shares outstanding. Mr. Radoff, as a director of the Radoff Foundation, may be deemed the beneficial owner of the 500,000 Shares owned by the Radoff Foundation, which together with the 2,110,232 Shares he directly owns, constitutes an aggregate of 2,610,232 Shares beneficially owned by Mr. Radoff, constituting approximately 4.6% of the Shares outstanding.

As of the date hereof, JEC II directly beneficially owned 1,167,296 Shares, constituting approximately 2.1% of the Shares outstanding.

As of the date hereof, MOS Trust directly beneficially owned 215,000 Shares, constituting approximately 0.4% of the Shares outstanding. MOS PTC, as the trustee of MOS Trust, may be deemed the beneficial owner of the 215,000 Shares owned by MOS Trust, constituting approximately 0.4% of the Shares outstanding.

As of the date hereof, Mr. Torok directly beneficially owned 285,000 Shares, constituting approximately 0.5% of the Shares outstanding. Mr. Torok, (i) as the Manager of JEC II, may be deemed the beneficial owner of the 1,167,296 Shares owned by JEC II, and (ii) as a Manager of MOS PTC, may be deemed the beneficial owner of the 215,000 Shares owned by MOS Trust, which together with the 285,000 Shares he directly owns, constitutes an aggregate of 1,667,296 Shares beneficially owned by Mr. Torok, constituting approximately 3.0% of the Shares outstanding.

Each Reporting Person may be deemed to be a member of a "group" with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, and such group may be deemed to beneficially own the 4,277,528 Shares owned in the aggregate by all of the Reporting Persons, constituting approximately 7.6% of the Shares outstanding. Each Reporting Person disclaims beneficial ownership of the Shares that he or it does not directly own.

**(b)**
—

**(c)**
Item 5(c) is hereby amended and restated to read as follows:

The transactions in securities of the Issuer by the Reporting Persons since the filing of the initial Schedule 13D are set forth in Exhibit 2 and are incorporated herein by reference. All of such transactions were effected in the open market unless otherwise noted therein.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Radoff Family Foundation

**Signature:** /s/ Bradley L. Radoff

**Name/Title:** Bradley L. Radoff, Director

**Date:** 03/02/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Radoff Bradley Louis

**Signature:** /s/ Bradley L. Radoff

**Name/Title:** Bradley L. Radoff

**Date:** 03/02/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JEC II Associates, LLC

**Signature:** /s/ Michael Torok

**Name/Title:** Michael Torok, Manager

**Date:** 03/02/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** The MOS Trust

**Signature:** /s/ Michael Torok

**Name/Title:** Michael Torok, Manager of MOS PTC, LLC, its Trustee

**Date:** 03/02/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** MOS PTC, LLC

**Signature:** /s/ Michael Torok

**Name/Title:** Michael Torok, Manager

**Date:** 03/02/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Torok Michael

**Signature:** /s/ Michael Torok

**Name/Title:** Michael Torok

**Date:** 03/02/2026