PRIMECAP discloses 5.34% stake in Booz Allen

PRIMECAP Management Co., a U.S. investment manager, reports beneficial ownership of 6,397,644 shares of BOOZ ALLEN HAMILTON HOLDING CORPORATION common stock on a Schedule 13G. This represents 5.34% of the outstanding common shares.

Accepted by SEC EDGAR 08/06/2026 - 04:54 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

PRIMECAP Management Co., a U.S. investment manager, reports beneficial ownership of 6,397,644 shares of BOOZ ALLEN HAMILTON HOLDING CORPORATION common stock on a Schedule 13G. This represents 5.34% of the outstanding common shares.

PRIMECAP has sole voting power over 632,744 shares and sole dispositive power over all 6,397,644 shares, with no shared voting or dispositive power reported.

Key Figures

Beneficially owned shares: 6,397,644 shares Percent of class: 5.34% Sole Voting Power: 632,744 shares +3 more

6 metrics

Beneficially owned shares 6,397,644 shares Common stock beneficially owned by PRIMECAP Management Co.

Percent of class 5.34% Percentage of Booz Allen common stock class owned by PRIMECAP

Sole Voting Power 632,744 shares Shares over which PRIMECAP has sole power to vote

Shared Voting Power 0 shares Shares over which PRIMECAP has shared voting power

Sole Dispositive Power 6,397,644 shares Shares over which PRIMECAP has sole power to dispose

Shared Dispositive Power 0 shares Shares over which PRIMECAP has shared dispositive power

Key Terms

Schedule 13G, beneficially owned, Sole Voting Power, Sole Dispositive Power

4 terms

Schedule 13G regulatory

"PRIMECAP Management Co. reports beneficial ownership on a Schedule 13G"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficially owned financial

"Amount beneficially owned: 6,397,644"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power financial

"Sole Voting Power 632,744.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power financial

"Sole Dispositive Power 6,397,644.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

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

How many BAH shares does PRIMECAP Management Co. report owning on this Schedule 13G?

PRIMECAP Management Co. reports beneficial ownership of 6,397,644 shares of Booz Allen Hamilton Holding Corporation common stock. This figure reflects shares over which it has investment power.

What percentage of Booz Allen Hamilton (BAH) does PRIMECAP Management Co. beneficially own?

PRIMECAP Management Co. reports owning 5.34% of Booz Allen Hamilton’s common stock. This percentage is based on the issuer’s outstanding shares as referenced in the Schedule 13G.

How much voting power does PRIMECAP Management Co. have over BAH shares?

PRIMECAP Management Co. has sole voting power over 632,744 shares of Booz Allen Hamilton and no shared voting power, according to the Schedule 13G filing.

What dispositive power over Booz Allen Hamilton (BAH) shares does PRIMECAP Management Co. report?

PRIMECAP Management Co. reports sole dispositive power over 6,397,644 shares of Booz Allen Hamilton common stock and no shared dispositive power in this Schedule 13G.

Who signed the Schedule 13G for PRIMECAP Management Co. regarding BAH?

The Schedule 13G was signed by Jennifer Ottosen, Chief Compliance Officer of PRIMECAP Management Co., dated 08/06/2026, certifying the accuracy of the ownership information.

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

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

BOOZ ALLLEN HAMILTON HOLDING CORPORATION

(Name of Issuer)

COM

(Title of Class of Securities)

099502106

(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): 099502106

1

Names of Reporting Persons

PRIMECAP MANAGEMENT CO/CA/

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 632,744.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,397,644.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,397,644.00

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)

5.34 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: BOOZ ALLLEN HAMILTON HOLDING CORPORATION
(b)	Address of issuer's principal executive offices: 8283 GREENSBORO DRIVE, MCLEAN, VIRGINIA 22102
Item 2.
(a)	Name of person filing: PRIMECAP MANAGEMENT CO/CA/
(b)	Address or principal business office or, if none, residence: 177 EAST COLORADO BLVD. 11TH FLOOR PASADENA, California 91105
(c)	Citizenship: PRIMECAP MANAGEMENT CO/CA/ - UNITED STATES
(d)	Title of class of securities: COM
(e)	CUSIP Number(s): 099502106
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: 6,397,644
(b)	Percent of class: 5.34 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: PRIMECAP MANAGEMENT CO/CA/ - 632,744
	(ii) Shared power to vote or to direct the vote: PRIMECAP MANAGEMENT CO/CA/ - 0
	(iii) Sole power to dispose or to direct the disposition of: PRIMECAP MANAGEMENT CO/CA/ - 6,397,644
	(iv) Shared power to dispose or to direct the disposition of: PRIMECAP MANAGEMENT CO/CA/ - 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.
	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.

PRIMECAP MANAGEMENT CO/CA/

Signature:	JENNIFER OTTOSEN
Name/Title:	CHIEF COMPLIANCE OFFICER
Date:	08/06/2026