[SCHEDULE 13G] SI-BONE, Inc. SEC Filing

Rhea-AI Filing Summary

Champlain Investment Partners, LLC reported beneficial ownership of 2,140,074 shares of SI-BONE, Inc. common stock, representing 5.0% of the outstanding class. The filing states Champlain is organized in Vermont and acts as an investment adviser.

The report breaks down voting and dispositive power: 1,368,619 shares are listed as sole voting power and 2,140,074 shares as sole dispositive power. The filer certifies the holdings were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Beneficial ownership disclosed: Champlain reports 2,140,074 shares (5.0%), providing investor transparency
• Clear authority breakdown: Filing specifies 1,368,619 sole voting power and 2,140,074 sole dispositive power
• Certification of passive intent: States holdings were acquired and are held in the ordinary course and not to influence control

Negative

• None.

Insights

Financial Analyst

TL;DR: Champlain discloses a passive 5.0% stake in SI-BONE with full dispositive control and significant sole voting power.

The filing is a routine Schedule 13G disclosure showing a 2,140,074-share position equal to 5.0% of the class. As an investment adviser reporting under the passive 13G regime, the filing signals a material but non-controlling economic interest. The split between 1,368,619 sole voting shares and 2,140,074 sole dispositive shares clarifies governance versus disposal authority. This is informational for holders and market participants but does not indicate an intent to change control.

Corporate Governance Expert

TL;DR: Disclosure improves transparency; ownership size merits monitoring but does not alone imply activist intent.

The statement includes the required certification that the securities are held in the ordinary course and not to influence control, consistent with Schedule 13G treatment. Ownership at exactly 5.0% is a regulatory threshold that triggers visibility; governance implications depend on future activity, votes, or additional acquisitions. For now, the filing documents voting and dispositive authority without alleging coordination with other holders or group formation.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

SI-BONE, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

825704109

(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. 825704109

1

Names of Reporting Persons

Champlain Investment Partners, 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

VERMONT

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,368,619.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,140,074.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,140,074.00

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)

5.0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: SI-BONE, Inc.
(b)	Address of issuer's principal executive offices: 471 EL CAMINO REAL, SUITE 101, SANTA CLARA, CALIFORNIA, 95050
Item 2.
(a)	Name of person filing: Champlain Investment Partners, LLC
(b)	Address or principal business office or, if none, residence: 180 Battery St., Burlington, Vermont 05401
(c)	Citizenship: Vermont
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 825704109
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: 2,140,074.00
(b)	Percent of class: 5.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,368,619.00
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,140,074.00
	(iv) Shared power to dispose or to direct the disposition of: 0
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. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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.

Champlain Investment Partners, LLC

Signature:	Matthew Garcia
Name/Title:	Chief Compliance Officer
Date:	08/12/2025

FAQ

How many SI-BONE (SIBN) shares does Champlain Investment Partners report owning?

Champlain reports beneficial ownership of 2,140,074 shares of SI-BONE common stock.

What percentage of SI-BONE does Champlain own according to the Schedule 13G?

The filing states Champlain owns 5.0% of the outstanding class of SI-BONE common stock.

How much voting power does Champlain report for SIBN shares?

Champlain reports 1,368,619 shares as sole voting power and 0 shared voting power.

Does Champlain claim the shares are held to influence control of SI-BONE?

No. The filing includes a certification that the securities are held in the ordinary course of business and not for the purpose of changing or influencing control.

What authority does Champlain have over disposal of the SIBN shares?

The filing lists 2,140,074 shares as sole dispositive power and 0 shared dispositive power.