SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 10)

BIODESIX INC

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

09075X207

(CUSIP Number)

Jack W. Schuler
PO Box 531,
Lake Bluff, IL, 60044
(520) 906-2991

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

01/23/2026

(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 No.

09075X207

Name of reporting person

SCHULER JACK W

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 20,735.00
8	Shared Voting Power 2,313,210.00
9	Sole Dispositive Power 20,735.00
10	Shared Dispositive Power 2,313,210.00

Aggregate amount beneficially owned by each reporting person

2,333,945.00

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)

24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

(1) Sole voting and dispositive power includes 20,735 Shares (as defined herein) that the Reporting Person has the right to acquire within 60 days of the date of this filing. (2) Percent of class is calculated based on a total of 9,685,789 Shares outstanding, as provided by the Issuer on January 23, 2026, plus 20,735 Shares that the Reporting Person has the right to acquire within 60 days of the date of this filing.

SCHEDULE 13D

CUSIP No.

09075X207

Name of reporting person

Jack W. Schuler Living 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

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 1,563,210.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 1,563,210.00

Aggregate amount beneficially owned by each reporting person

1,563,210.00

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)

16.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

(1) Percent of class is calculated based on a total of 9,685,789 Shares outstanding, as provided by the Issuer on January 23, 2026.

SCHEDULE 13D

CUSIP No.

09075X207

Name of reporting person

Jack W. Schuler 2025 GRAT

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

ILLINOIS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 750,000.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 750,000.00

Aggregate amount beneficially owned by each reporting person

750,000.00

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)

7.7 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

(1) Percent of class is calculated based on a total of 9,685,789 Shares outstanding, as provided by the Issuer on January 23, 2026.

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Stock, par value $0.001 per share

(b)

Name of Issuer:

BIODESIX INC

(c)

Address of Issuer's Principal Executive Offices:

919 WEST DILLON RD, LOUISVILLE, COLORADO , 80027.

Item 1 Comment:

This Amendment No. 10 to Schedule 13D ("Amendment No. 10") is being filed by the undersigned, pursuant to section 240.13d-2(a), to amend and supplement the Schedule 13D filed with the U.S. Securities and Exchange Commission (the "SEC") on November 9, 2020 (the "Initial Schedule 13D"), as amended on January 28, 2022, on April 11, 2022, on November 23, 2022, on August 11, 2023, on April 9, 2024, on May 23, 2024, on May 20, 2025, on September 3, 2025, and on September 23, 2025 (collectively, the "Schedule 13D"), with respect to the common stock, par value $0.001 per share (the "Shares"), of Biodesix, Inc. (the "Issuer" or the "Company"), whose principal executive offices are located at 919 West Dillon Rd., Louisville, Colorado 80027.

Item 3.

Source and Amount of Funds or Other Consideration

Item 3 of the Schedule 13D is hereby amended and supplemented as follows: On January 22, 2026, Mr. Schuler, through the Trust, purchased 82,465 Shares in the open market, through a broker, in multiple transactions at prices ranging from $10.675 to $11.10, inclusive, with a weighted average price of $10.9569 per Share. On January 23, 2026, Mr. Schuler, through the Trust, purchased 80,000 Shares in the open market, through a broker, in multiple transactions at prices ranging from $11.225 to $12.05, inclusive, with a weighted average price of $11.8084 per Share. On January 26, 2026, Mr. Schuler, through the Trust, purchased 20,000 Shares in the open market, through a broker, in multiple transactions at prices ranging from $11.56 to $11.99, inclusive, with a weighted average price of $11.8032 per Share. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of Shares purchased at each separate price within the ranges set forth herein. The source of funds for the purchases reported herein was Mr. Schuler's personal funds.

Item 4.

Purpose of Transaction

Item 4 of the Schedule 13D is hereby amended and supplemented as follows: Mr. Schuler transitioned to the role of emeritus director of the Issuer at the Issuer's 2025 Annual Meeting of Stockholders held on May 20, 2025.

Item 5.

Interest in Securities of the Issuer

(a)

Item 5(a)-(c) of the Schedule 13D is hereby amended and restated as follows: As of the date hereof, Mr. Schuler may be deemed to beneficially own, in the aggregate, 2,333,945 Shares, which represents approximately 24.0% of the Shares outstanding. Mr. Schuler's beneficial ownership consists of (i) 4,156 Shares that Mr. Schuler has the right to acquire upon exercise of options exercisable within 60 days of the date of this filing, (ii) 16,579 Shares that Mr. Schuler has the right to acquire upon settlement of vested RSUs within 60 days of the date of this filing, (iii) 1,563,210 Shares held by the Trust, representing approximately 16.1% of the Shares outstanding, and (iv) 750,000 Shares held by the GRAT, representing approximately 7.7% of the Shares outstanding. The foregoing beneficial ownership percentages are based on a total of (i) 9,685,789 Shares outstanding, as provided by the Issuer on January 23, 2026, and, for purposes of calculating Mr. Schuler's beneficial ownership percentage, (ii) 20,735 Shares that Mr. Schuler has the right to acquire within 60 days of the date of this filing.

(b)

Mr. Schuler has the sole power to vote or direct the vote, and the sole power to dispose or direct the disposition of, the 20,735 Shares that Mr. Schuler has the right to acquire within 60 days of the date of this filing. As sole trustee of the Trust, Mr. Schuler shares with the Trust the power to vote or direct the vote, and the power to dispose or direct the disposition of, the 1,563,210 Shares beneficially owned by the Trust. As sole trustee of the GRAT, Mr. Schuler shares with the GRAT the power to vote or direct the vote, and the power to dispose or direct the disposition of, the 750,000 Shares beneficially owned by the GRAT.

(c)

The response to Item 3 of this Amendment No. 10 is incorporated by reference herein. Except as set forth in this Amendment No. 10, no transactions in the Shares have been effected by the Reporting Persons within the past 60 days.

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.

SCHULER JACK W

Signature:	/s/ Jack W. Schuler
Name/Title:	Jack W. Schuler
Date:	01/27/2026

Jack W. Schuler Living Trust

Signature:	/s/ Jack W. Schuler
Name/Title:	Jack W. Schuler, Trustee
Date:	01/27/2026

Jack W. Schuler 2025 GRAT

Signature:	/s/ Jack W. Schuler
Name/Title:	Jack W. Schuler, Trustee
Date:	01/27/2026

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