Ameriprise and Columbia disclose ~7% stakes in Tenable

Tenable Holdings, Inc. ownership disclosure: Ameriprise Financial, Inc. and Columbia Management Investment Advisers, LLC reported shared voting and dispositive power over common stock positions in an amended Schedule 13G/A filed as of 05/15/2026.

Rhea-AI Filing Summary

Tenable Holdings, Inc. ownership disclosure: Ameriprise Financial, Inc. and Columbia Management Investment Advisers, LLC reported shared voting and dispositive power over common stock positions in an amended Schedule 13G/A filed as of 05/15/2026.

The cover-page figures show Ameriprise Financial with shared voting power 7,794,236 and shared dispositive power 8,499,447 (reported 7.4% of the class). Columbia Management Investment Advisers, LLC is shown with shared voting power 7,794,236 and shared dispositive power 8,141,316 (reported 7.1% of the class). Each reporting person disclaims beneficial ownership of the shares they report.

Insights

Institutional Ownership Analyst

Large passive holdings disclosed by Ameriprise and its advisory affiliate.

The filing lists 8,499,447 shares of shared dispositive power for Ameriprise and 8,141,316 for CMIA. These counts and accompanying percentages describe reported voting and dispositive arrangements, not trades or transfers.

Stake influence depends on coordinated voting and disposition; the filing states that both entities disclaim beneficial ownership and that AFIs reported count includes CMIAs holdings. Subsequent filings would clarify any changes to shared control.

Regulatory Compliance Specialist

Schedule 13G/A amendment correctly attributes parent/affiliate reporting and attaches exhibits for subsidiary identification.

The amendment identifies AFI as parent and references Exhibit I for subsidiary classification and Exhibit II for the joint filing agreement. It reiterates the incorporated cover-page line items for voting and dispositive power.

The disclosure preserves standard disclaimers of beneficial ownership and supplies contact and signature details dated 05/15/2026 for verification in the issuers records.

Key Figures

Ameriprise shared voting power: 7,794,236 shares Ameriprise shared dispositive power: 8,499,447 shares Ameriprise percent of class: 7.4% +3 more

6 metrics

Ameriprise shared voting power 7,794,236 shares cover-page rows for AFI

Ameriprise shared dispositive power 8,499,447 shares cover-page rows for AFI

Ameriprise percent of class 7.4% cover-page Row (11) for AFI

CMIA shared voting power 7,794,236 shares cover-page rows for CMIA

CMIA shared dispositive power 8,141,316 shares cover-page rows for CMIA

CMIA percent of class 7.1% cover-page Row (11) for CMIA

Key Terms

Schedule 13G/A, shared dispositive power, disclaims beneficial ownership

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) Tenable Holdings, Inc. Common Stock"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

shared dispositive power regulatory

"Shared Dispositive Power 8,499,447.00"

disclaims beneficial ownership regulatory

"Each of AFI and CMIA disclaims beneficial ownership of any shares reported"

FAQ

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

What stake does Ameriprise report in TENB?

Ameriprise reports shared dispositive power over 8,499,447 shares and shared voting power of 7,794,236. The Schedule 13G/A shows Ameriprises reported position as 7.4% of the class and includes CMIAs reported shares under AFIs cover page.

What stake does Columbia Management Investment Advisers report in TENB?

Columbia Management Investment Advisers reports shared dispositive power over 8,141,316 shares and shared voting power of 7,794,236. The filing lists this position as 7.1% of the class and is incorporated on the cover page rows referenced in Item 4.

Do Ameriprise or CMIA claim beneficial ownership of the shares?

No. Both Ameriprise and CMIA expressly disclaim beneficial ownership of the shares reported on this Schedule 13G/A. The filing states the counts are reported by each entity but include disclaimers of ownership and control.

When were these ownership figures attested and signed?

The Schedule 13G/A amendment is signed by Michael G. Clarke on 05/15/2026. The filing includes contact information for Charles Chiesa and references Exhibits I and II for subsidiary identification and the joint filing agreement.

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

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Accepted by SEC EDGAR 05/15/2026 - 10:38 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Tenable Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

88025T102

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 88025T102

1

Names of Reporting Persons

Ameriprise Financial, Inc.

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 7,794,236.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 8,499,447.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,499,447.00

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)

7.4 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 88025T102

1

Names of Reporting Persons

Columbia Management Investment Advisers, 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

MINNESOTA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 7,794,236.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 8,141,316.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,141,316.00

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)

7.1 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Tenable Holdings, Inc.
(b)	Address of issuer's principal executive offices: 6100 Merriweather Drive, Columbia, MD 21044
Item 2.
(a)	Name of person filing: (a) Ameriprise Financial, Inc. ("AFI") (b) Columbia Management Investment Advisers, LLC ("CMIA")
(b)	Address or principal business office or, if none, residence: (a) 145 Ameriprise Financial Center, Minneapolis, MN 55474 (b) 290 Congress Street, Boston, MA 02210
(c)	Citizenship: (a) Delaware (b) Minnesota
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 88025T102
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: Incorporated by reference to Items (5)-(9) and (11) of the cover page pertaining to each reporting person. AFI, as the parent company of CMIA, may be deemed to beneficially own the shares reported herein by CMIA. Accordingly, the shares reported herein by AFI include those shares separately reported herein by CMIA. Each of AFI and CMIA disclaims beneficial ownership of any shares reported on this Schedule.
(b)	Percent of class: The information required by Item 4(b) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c) is set forth in Rows (5)-(9) and (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each Reporting Person.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. AFI: See Exhibit I
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.

Ameriprise Financial, Inc.

Signature:	/s/ Michael G. Clarke
Name/Title:	Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:	05/15/2026

Columbia Management Investment Advisers, LLC

Signature:	/s/ Michael G. Clarke
Name/Title:	Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services
Date:	05/15/2026

Comments accompanying signature: Contact Information Charles Chiesa VP Fund Treasurer Global Operations and Investor Services Telephone: 617-385-9593

Exhibit Information

Exhibit Index Exhibit I Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company. Exhibit II Joint Filing Agreement