NPK International Inc. received an amended Schedule 13G (Amendment No. 8) from Ameriprise Financial, Inc. and affiliated entities regarding holdings of its Common Stock. As of the event date 09/30/2025, Ameriprise reports 5,247,637 shares beneficially owned, representing 6.2% of the class, with shared voting power of 5,243,010 and shared dispositive power of 5,247,637. No sole voting or dispositive power was reported.
Several UK-based Ameriprise affiliates, including Threadneedle entities, each report 4,864,300 shares (5.8%) with shared voting and dispositive power. The Ameriprise Entities disclaim beneficial ownership except as stated and certify the securities were acquired and are held in the ordinary course, not to change or influence control.
Positive
None.
Negative
None.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 8)
NPK International Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
651718504
(CUSIP Number)
09/30/2025
(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.
651718504
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
5,243,010.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
5,247,637.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,247,637.00
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)
6.2 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
TAM UK International Holdings Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
Threadneedle Holdings Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
TAM UK Holdings Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
Threadneedle Asset Management Holdings Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
TC Financing Ltd
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
Threadneedle Asset Management Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
CUSIP No.
651718504
1
Names of Reporting Persons
Threadneedle Investment Services Limited
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,864,300.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,864,300.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,864,300.00
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)
5.8 %
12
Type of Reporting Person (See Instructions)
FI
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
NPK International Inc.
(b)
Address of issuer's principal executive offices:
9320 Lakeside Boulevard, Suite 100, The Woodlands, TX 77381
Item 2.
(a)
Name of person filing:
(a) Ameriprise Financial, Inc. ("AFI")
(b) TAM UK International Holdings Limited ("TAMUKI")
(c) Threadneedle Holdings Limited ("THL")
(d) TAM UK Holdings Limited ("TUHL")
(e) Threadneedle Asset Management Holdings Limited ("TAMHL")
(f) TC Financing Ltd ("TCFL")
(g) Threadneedle Asset Management Limited ("TAML")
(h) Threadneedle Investment Services Limited ("TISL")
Persons (a) through (h) are sometimes referred to herein as the "Ameriprise Entities".
(b)
Address or principal business office or, if none, residence:
(a) Delaware
(b) United Kingdom
(c) United Kingdom
(d) United Kingdom
(e) United Kingdom
(f) United Kingdom
(g) United Kingdom
(h) United Kingdom
(d)
Title of class of securities:
Common Stock
(e)
CUSIP No.:
651718504
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 the other Ameriprise Entities, may be deemed to beneficially own the shares reported herein by those reporting persons. Accordingly, the shares reported herein by AFI include those shares separately reported herein by those reporting persons.
Each of the Ameriprise Entities 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.
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, President, North America Head of Operations & Investor Services
Date:
11/14/2025
TAM UK International Holdings Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
Threadneedle Holdings Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
TAM UK Holdings Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
Threadneedle Asset Management Holdings Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
TC Financing Ltd
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
Threadneedle Asset Management Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
Threadneedle Investment Services Limited
Signature:
/s/ Michael G. Clarke
Name/Title:
By: Columbia Mgmt Investment Advisers, LLC, as Attorney in Fact, By: Michael G. Clarke SVP, North America Head of Operations & Investor Services
Date:
11/14/2025
Comments accompanying signature: Contact Information
Charles Chiesa
VP Fund Treasurer Global Operations and Investor Services
Telephone: 617-385-9593
Exhibit Index
Exhibit I Identification and Classification of the Subsidiaries which Acquired the Security Being
Reported on by the Parent Holding Company.
Exhibit II Joint Filing Agreement
Exhibit III Powers of Attorney
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