Dimensional Fund Advisors (PNRG) reports 5.2% PrimeEnergy Resources stake

Rhea-AI Filing Summary

Dimensional Fund Advisors LP reports beneficial ownership of PrimeEnergy Resources Corp common stock. It reports 84,927 shares beneficially owned, representing 5.2% of the class as of 06/30/2026.

Dimensional has sole voting power over 83,741 shares and sole dispositive power over 84,927 shares, with no shared voting or dispositive power. All securities are held in underlying funds and accounts it advises or manages, which receive dividends and sale proceeds, while Dimensional disclaims beneficial ownership except for Section 13(d) reporting purposes.

Key Figures

Beneficial ownership: 84,927 shares Percent of class: 5.2% Sole voting power: 83,741 shares +3 more

6 metrics

Beneficial ownership 84,927 shares Amount of PrimeEnergy Resources common stock reported as beneficially owned

Percent of class 5.2% Portion of PrimeEnergy Resources common stock class reported as beneficially owned

Sole voting power 83,741 shares Shares over which Dimensional Fund Advisors has sole power to vote

Shared voting power 0 shares Shares over which Dimensional Fund Advisors has shared power to vote

Sole dispositive power 84,927 shares Shares over which Dimensional Fund Advisors has sole power to dispose

Ownership reporting date 06/30/2026 Date associated with the reported 5.2% beneficial ownership stake

Key Terms

beneficial owner, dispositive power, Schedule 13(d), Investment Company Act of 1940, +1 more

5 terms

beneficial owner regulatory

"may be deemed to be the beneficial owner of the shares of the Issuer"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

dispositive power financial

"Sole Dispositive Power 84,927.00 8 | Shared Dispositive Power 0.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Schedule 13(d) regulatory

"for any other purposes than Section 13(d) of the Securities Exchange Act of 1934"

Investment Company Act of 1940 regulatory

"investment companies registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

Investment Advisers Act of 1940 regulatory

"an investment adviser registered under Section 203 of the Investment Advisors Act of 1940"

A U.S. federal law that sets rules for people and firms who give investment advice, requiring them to register with regulators, be honest about conflicts, keep records, and follow basic standards of care. It matters to investors because those rules act like licensing and consumer protections — similar to having safety standards for a mechanic — helping ensure advisers act in clients’ financial interests and reducing the risk of fraud or misuse of funds.

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Available on EDGAR 07/14/2026 - 01:28 PM Accepted by SEC EDGAR 07/14/2026 - 01:27 PM Learn about SEC filing dates

FAQ

What percentage of PrimeEnergy Resources (PNRG) does Dimensional Fund Advisors report owning?

Dimensional Fund Advisors reports beneficial ownership of 5.2% of PrimeEnergy Resources common stock. This corresponds to 84,927 shares as of 06/30/2026, reported under Section 13(d) rules for institutional investors.

How many PrimeEnergy Resources (PNRG) shares does Dimensional Fund Advisors report as beneficially owned?

Dimensional Fund Advisors reports 84,927 shares of PrimeEnergy Resources common stock as beneficially owned. This stake represents 5.2% of the class and is held across client funds and accounts it advises or manages.

What voting and dispositive powers does Dimensional Fund Advisors have over PNRG shares?

Dimensional Fund Advisors has sole voting power over 83,741 shares and sole dispositive power over 84,927 shares of PrimeEnergy Resources. It reports no shared voting and no shared dispositive power over the common stock.

Who actually receives dividends and sale proceeds from Dimensional’s PNRG holdings?

Underlying client funds and accounts advised by Dimensional receive dividends and sale proceeds from the PrimeEnergy Resources shares. Dimensional states the securities are owned by these funds and disclaims beneficial ownership beyond Section 13(d) reporting.

Does any single Dimensional-managed fund hold more than 5% of PrimeEnergy Resources (PNRG)?

According to Dimensional, the interest of any one fund does not exceed 5% of the class of PrimeEnergy Resources common stock. The reported 5.2% stake reflects holdings aggregated across multiple funds and accounts.

Why does Dimensional Fund Advisors disclaim beneficial ownership of PNRG shares?

Dimensional explains it may be deemed the beneficial owner through voting or investment power for client funds but disclaims beneficial ownership. The statement limits attribution of ownership to what is required for Section 13(d) of the Exchange Act reporting.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

PrimeEnergy Resources Corp

(Name of Issuer)

Common Stock

(Title of Class of Securities)

74158E104

(CUSIP Number)

06/30/2026

(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): 74158E104

1

Names of Reporting Persons

Dimensional Fund Advisors 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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 83,741.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 84,927.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

84,927.00

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)

5.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: PrimeEnergy Resources Corp
(b)	Address of issuer's principal executive offices: 9821 Katy Freeway, Houston, TX 77024
Item 2.
(a)	Name of person filing: Dimensional Fund Advisors LP
(b)	Address or principal business office or, if none, residence: 6300 Bee Cave Road, Building One, Austin, TX 78746
(c)	Citizenship: Delaware Limited Partnership
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 74158E104
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: 84,927 ** see Note 1 ** ** Note 1 ** Dimensional Fund Advisors LP, an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager or sub-adviser to certain other commingled funds, group trusts and separate accounts (such investment companies, trusts and accounts, collectively referred to as the "Funds"). In certain cases, subsidiaries of Dimensional Fund Advisors LP may act as an adviser or sub-adviser to certain Funds. In its role as investment advisor, sub-adviser and/or manager, Dimensional Fund Advisors LP or its subsidiaries (collectively, "Dimensional") may possess voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds. However, all securities reported in this schedule are owned by the Funds. Dimensional disclaims beneficial ownership of such securities. In addition, the filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934.
(b)	Percent of class: 5.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 83,741** see Note 1 **
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 84,927** see Note 1 **
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Funds described in Note 1 above have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the securities held in their respective accounts. To the knowledge of Dimensional, the interest of any one such Fund does not exceed 5% of the class of securities. Dimensional Fund Advisors LP disclaims beneficial ownership of all such securities.
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.

Dimensional Fund Advisors LP

Signature:	Selwyn Notelovitz
Name/Title:	Global Chief Compliance Officer
Date:	07/14/2026