Citadel Discloses 5.1% Stake in Semler Scientific (SMLR) on Schedule 13G

Citadel-related entities and Kenneth Griffin report beneficial ownership of Semler Scientific (SMLR) common stock totaling approximately 697,427 shares, representing 5.1% of the class.

Rhea-AI Filing Summary

Citadel-related entities and Kenneth Griffin report beneficial ownership of Semler Scientific (SMLR) common stock totaling approximately 697,427 shares, representing 5.1% of the class. The filing is a joint Schedule 13G covering Citadel Securities GP LLC, Citadel Securities LLC, Citadel Securities Group LP, Citadel Advisors LLC, Citadel Advisors Holdings LP, Citadel GP LLC, and Kenneth Griffin. Ownership totals per entity range from 570 shares to 697,997 shares for Mr. Griffin. The groups report no sole voting or dispositive power; all reported voting and dispositive power is shared. The percentages are calculated on 13,688,405 shares outstanding as of June 30, 2025.

Positive

• Material institutional disclosure: Citadel-related reporting persons disclose a combined 5.1% stake, meeting SEC transparency thresholds
• Clarity on holdings: Filing provides exact share counts and the share-outstanding basis (13,688,405) used to calculate percentages

Negative

• No sole voting or dispositive power: All reported authority is shared, indicating limited unilateral governance influence
• Passive filing (13G): The statement indicates holdings are reported as passive rather than an active intent to change control

Insights

Financial Analyst

TL;DR: Citadel-linked parties disclose a >5% passive stake in SMLR, indicating a notable institutional position without sole control.

The joint Schedule 13G shows institutional accumulation equivalent to 5.1% of Semler Scientific's outstanding common stock. For investors, a >5% passive filing signals that sizeable liquidity and trading flows may be associated with these desks and funds. The filing discloses shared voting and dispositive power rather than sole control, consistent with passive or investment-management positions rather than an activist intent. The base of 13,688,405 shares outstanding provides the context for the 5.1% figure. This is material ownership disclosure but does not change governance dynamics given the lack of sole control.

Corporate Governance Expert

TL;DR: Ownership crosses the 5% disclosure threshold but shows no unilateral control; governance impact appears limited.

The Schedule 13G identifies multiple affiliated reporting persons and shows shared voting and dispositive power across Citadel entities and Mr. Griffin. Because the filing is a 13G rather than a 13D and indicates shared rather than sole authority, it reflects a passive or investment-management position rather than a coordinated effort to influence corporate control. From a governance standpoint, this means Semler Scientific should note the institutional holder but does not face an immediate change in control or activist pressure based on this filing alone.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many SMLR shares do Citadel entities and Kenneth Griffin report owning?

The filing reports 697,427 shares (5.1% of class) for certain Citadel entities and 697,997 shares (5.1%) for Kenneth Griffin, based on 13,688,405 shares outstanding as of June 30, 2025.

Does this Schedule 13G indicate an attempt to control Semler Scientific (SMLR)?

No. The filing is a Schedule 13G and reports shared voting and dispositive power, indicating a passive investment rather than an effort to change or influence control.

Which Citadel entities filed this Schedule 13G for SMLR?

The reporting persons are Citadel Securities GP LLC, Citadel Securities LLC, Citadel Securities Group LP, Citadel Advisors LLC, Citadel Advisors Holdings LP, Citadel GP LLC, and Kenneth Griffin.

What voting and disposition powers are reported in the filing?

All reporting persons report 0 sole voting and dispositive power and instead report shared voting and shared dispositive power for the disclosed shares.

What share count was used to calculate the ownership percentages?

The percentages are based on 13,688,405 shares outstanding as of June 30, 2025, per the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/14/2025 - 04:32 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Semler Scientific, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share (the "Shares")

(Title of Class of Securities)

81684M104

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel Securities GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 697,427.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 697,427.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

697,427.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

HC, OO

Comment for Type of Reporting Person: The percentages reported in this Schedule 13G are based upon 13,688,405 Shares outstanding as of June 30, 2025 (according to the issuer's Form 8-K as filed with the Securities and Exchange Commission on August 4, 2025).

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel Securities LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 635,373.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 635,373.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

635,373.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.6 %

12

Type of Reporting Person (See Instructions)

BD, OO

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel Securities Group LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 697,427.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 697,427.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

697,427.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

HC, PN

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel Advisors LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 570.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 570.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

570.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

IA, HC, OO

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel Advisors Holdings LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 570.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 570.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

570.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

HC, PN

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Citadel GP LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 570.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 570.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

570.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13G

CUSIP No. 81684M104

1

Names of Reporting Persons

Kenneth Griffin

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 697,997.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 697,997.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

697,997.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Semler Scientific, Inc.
(b)	Address of issuer's principal executive offices: 51 E Campbell Ave, Suite 107-D, Campbell, CA, 95008
Item 2.
(a)	Name of person filing: This Schedule 13G is being jointly filed by Citadel Securities GP LLC ("CSGP"), Citadel Securities LLC ("Citadel Securities"), Citadel Securities Group LP ("CALC4"), Citadel Advisors LLC ("Citadel Advisors"), Citadel Advisors Holdings LP ("CAH"), Citadel GP LLC ("CGP"), and Mr. Kenneth Griffin (collectively with CSGP, Citadel Securities, CALC4, Citadel Advisors, CAH, and CGP, the "Reporting Persons") with respect to the Shares of the above-named issuer owned by Citadel Securities, Citadel Multi-Strategy Equities Master Fund Ltd., a Cayman Islands company ("CM"), and CRBU Holdings LLC, a Delaware limited liability company ("CRBH"). Such owned Shares may include other instruments exercisable for or convertible into Shares. CALC4 is the non-member manager of Citadel Securities and CRBH. CSGP is the general partner of CALC4. Citadel Advisors is the portfolio manager for CM. CAH is the sole member of Citadel Advisors. CGP is the general partner of CAH. Mr. Griffin is the President and Chief Executive Officer of CGP, and owns a controlling interest in CGP and CSGP. The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any).
(b)	Address or principal business office or, if none, residence: The address of each of the Reporting Persons is 830 Brickell Plaza, Miami, Florida 33131.
(c)	Citizenship: Each of CSGP, Citadel Securities, Citadel Advisors, and CGP is organized as a limited liability company under the laws of the State of Delaware. Each of CALC4 and CAH is organized as a limited partnership under the laws of the State of Delaware. Mr. Griffin is a U.S. citizen.
(d)	Title of class of securities: Common Stock, par value $0.001 per share (the "Shares")
(e)	CUSIP No.: 81684M104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1. Citadel Securities LLC may be deemed to beneficially own 635,373 Shares. 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own 697,427 Shares. 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own 570 Shares 4. Mr. Griffin may be deemed to beneficially own 697,997 Shares.
(b)	Percent of class: 1. The number of Shares that Citadel Securities LLC may be deemed to beneficially own constitutes 4.6% of the Shares outstanding. 2. The number of Shares that each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own constitutes 5.1% of the Shares outstanding. 3. The number of Shares that each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own constitutes 0.0% of the Shares outstanding. 4. The number of Shares that Mr. Griffin may be deemed to beneficially own constitutes 5.1% of the Shares outstanding.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1. Citadel Securities LLC: 0 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 4. Mr. Griffin: 0
	(ii) Shared power to vote or to direct the vote: 1. Citadel Securities LLC: 635,373 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 697,427 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 570 4. Mr. Griffin: 697,997
	(iii) Sole power to dispose or to direct the disposition of: 1. Citadel Securities LLC: 0 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0 4. Mr. Griffin: 0
	(iv) Shared power to dispose or to direct the disposition of: 1. Citadel Securities LLC: 635,373 2. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 697,427 3. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 570 4. Mr. Griffin: 697,997
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

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.

Citadel Securities GP LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Citadel Securities LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Citadel Securities Group LP

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Citadel Advisors LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Citadel Advisors Holdings LP

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Citadel GP LLC

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, Authorized Signatory
Date:	08/14/2025

Kenneth Griffin

Signature:	/s/ Seth Levy
Name/Title:	Seth Levy, attorney-in-fact*
Date:	08/14/2025

Comments accompanying signature: * Seth Levy is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for Allakos Inc. on October 13, 2023.

Exhibit Information

Exhibit 99.1 - Joint Filing Agreement