SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

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
2727 Kirby Drive, Unit 29L,
Houston, TX, 77098
713-482-2196

MICHAEL TOROK
68 Mazzeo Drive,
Randolph, MA, 02368
617-680-6709

RYAN NEBEL
OLSHAN FROME WOLOSKY LLP, 1325 Avenue of the Americas
New York, NY, 10019
212-451-2300

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

04/12/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

Radoff Family Foundation

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

TEXAS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 500,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 500,000.00

Aggregate amount beneficially owned by each reporting person

500,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.9 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

Radoff Bradley Louis

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

AF, PF

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 2,110,232.00
8	Shared Voting Power 500,000.00
9	Sole Dispositive Power 2,110,232.00
10	Shared Dispositive Power 500,000.00

Aggregate amount beneficially owned by each reporting person

2,610,232.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.6 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

JEC II Associates, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,167,296.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,167,296.00

Aggregate amount beneficially owned by each reporting person

1,167,296.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

2.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

The MOS Trust

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

WYOMING

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 215,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 215,000.00

Aggregate amount beneficially owned by each reporting person

215,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.4 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

MOS PTC, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

WYOMING

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 215,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 215,000.00

Aggregate amount beneficially owned by each reporting person

215,000.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0.4 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

81578P106

Name of reporting person

Torok Michael

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

AF, PF

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 285,000.00
8	Shared Voting Power 1,382,296.00
9	Sole Dispositive Power 285,000.00
10	Shared Dispositive Power 1,382,296.00

Aggregate amount beneficially owned by each reporting person

1,667,296.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

3.0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

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, CALIFORNIA , 94065.

Item 4.

Purpose of Transaction

Item 4 is hereby amended to add the following: On April 13, 2026, the Reporting Persons submitted a non-binding proposal to acquire 100% of the equity of the Issuer at a purchase price of $2.25 per Share in cash, representing a 33% premium to the Issuer's most recent closing price, plus a contingent value right representing the right for stockholders to receive 80% of the net proceeds received from any license, sale or other disposition of the Issuer's business and assets, including PrognomiQ (the "Proposal"). The Proposal is only subject to limited confirmatory due diligence and is based on the availability of at least $215 million of net cash and cash equivalents at closing and is not subject to any financing conditions. The Reporting Persons requested a response regarding the Issuer's board of directors' (the "Board") willingness and availability to discuss the Proposal no later than 5:00pm ET on April 22, 2026, at which point the Proposal will expire. Also on April 13, 2026, Mr. Radoff delivered a letter to the Issuer nominating Howard H. Berman, Joshua S. Horowitz and Luis E. Rinaldini (the "Nominees") for election to the Board at the Issuer's 2026 annual meeting of stockholders (the "Annual Meeting"). Also on April 13, 2026, the Reporting Persons issued a press release (the "Press Release"), which included a copy of the Proposal delivered to the Board and announced the nomination of the Nominees for election to the Board at the Annual Meeting. The foregoing descriptions of the Proposal and the Press Release do not purport to be complete and are qualified in their entirety by reference to the full text of the Press Release, which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 5.

Interest in Securities of the Issuer

(c)

Item 5(c) is hereby amended and restated to read as follows: There have been no transactions in the securities of the Issuer by the Reporting Persons since the filing of Amendment No. 1 to the Schedule 13D.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer

Item 6 is hereby amended to add the following: On April 12, 2026, (a) Radoff (as defined in the initial Schedule 13D), (b) JEC (as defined in the initial Schedule 13D) and (c) Dr. Berman and Messrs. Horowitz and Rinaldini (collectively, the "New Parties") entered into an amended and restated group agreement (the "Amended and Restated Group Agreement") with respect to the Issuer pursuant to which, among other things, (i) that certain group agreement, dated February 20, 2026, between Radoff and JEC was superseded in its entirety, (ii) the parties agreed to the joint filing on behalf of each of them of statements on Schedule 13D with respect to the securities of the Issuer to the extent required by applicable law, (iii) the parties agreed to solicit proxies for the election of certain persons nominated for election to the Board at the Annual Meeting (including those nominated by or on behalf of Radoff or JEC), (iv) the parties agreed not to transact in securities of the Issuer without the prior written consent of Radoff and JEC for so long as the Issuer's tax benefit preservation plan, dated as of February 26, 2026 (the "NOL Pill"), remains in effect; provided, that each New Party further agreed not to enter into any transactions in the securities of the Issuer without the prior written consent of Radoff and JEC notwithstanding any potential termination of the NOL Pill and (v) Radoff and JEC agreed to jointly pay all expenses and costs (including all legal fees) incurred in connection with the group's activities on a pro rata basis based on the number of Shares beneficially owned in the aggregate by such party. The Amended and Restated Group Agreement is attached hereto as Exhibit 99.2 and is incorporated herein by reference. Each of the Nominees has granted Mr. Radoff a power of attorney (each, a "Power of Attorney") to execute certain SEC filings and other documents in connection with the solicitation of proxies at the Annual Meeting. A form of the Power of Attorney is attached hereto as Exhibit 99.3 and is incorporated herein by reference.

Item 7.

Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibits: 99.1 - Press Release, dated April 13, 2026. 99.2 - Amended and Restated Group Agreement, dated April 12, 2026. 99.3 - Form of Power of Attorney.

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.

Radoff Family Foundation

Signature:	/s/ Bradley L. Radoff
Name/Title:	Bradley L. Radoff, Director
Date:	04/13/2026

Radoff Bradley Louis

Signature:	/s/ Bradley L. Radoff
Name/Title:	Bradley L. Radoff
Date:	04/13/2026

JEC II Associates, LLC

Signature:	/s/ Michael Torok
Name/Title:	Michael Torok, Manager
Date:	04/13/2026

The MOS Trust

Signature:	/s/ Michael Torok
Name/Title:	Michael Torok, Manager of MOS PTC, LLC, its Trustee
Date:	04/13/2026

MOS PTC, LLC

Signature:	/s/ Michael Torok
Name/Title:	Michael Torok, Manager
Date:	04/13/2026

Torok Michael

Signature:	/s/ Michael Torok
Name/Title:	Michael Torok
Date:	04/13/2026

Amendment: SEC Form SCHEDULE 13D/A filed by Seer Inc.