Prosperity Bancshares (PB) 13F: $124.8M holdings across 414 positions after merger

Rhea-AI Filing Summary

Prosperity Bancshares Inc. filed a Form 13F reporting institutional holdings of $124,753,836 across 414 positions as of March 31, 2026. The filing states these holdings reflect securities over which Prosperity Bank, doing business as American Bank National Association, exercised investment discretion following an January 1, 2026 merger.

The report lists one other included manager and indicates the Form 13F information table value total is $124,753,836, rounded to the nearest dollar.

Insights

Institutional Portfolio Analyst

Form 13F shows Prosperity Bank's post‑merger holdings totaling $124.8M across 414 positions.

The filing documents the portfolio Prudently: it attributes investment discretion to Prosperity Bank for accounts assumed from American Bank National Association after the January 1, 2026 merger and reports holdings as of March 31, 2026.

Cash‑flow treatment and transaction specifics are not disclosed in the excerpt; subsequent 13F amendments or institutional reports may detail position-level changes.

Regulatory Filings Specialist

This is a routine quarterly 13F holdings disclosure with a merger attribution note.

The report lists 414 information table entries and a total market value of $124,753,836, rounded to the nearest dollar. It names one included manager: American Bank National Association.

Investors should treat this as a holdings snapshot; the filing does not state trading intent, cost basis, or position-level details in the provided excerpt.

Key Figures

Form 13F Information Table Value Total: $124,753,836 Form 13F Information Table Entry Total: 414 positions Investment discretion as of: March 31, 2026 +2 more

5 metrics

Form 13F Information Table Value Total $124,753,836 Form 13F value total (rounded to nearest dollar)

Form 13F Information Table Entry Total 414 positions Number of reported holdings entries in the 13F information table

Investment discretion as of March 31, 2026 Date to which the reported holdings apply

Merger effective date January 1, 2026 ABNA merged into Prosperity Bank on this date; accounts assumed thereafter

Number of other included managers 1 Listed on the Form 13F summary page

Key Terms

Form 13F, investment discretion, information table entries

3 terms

Form 13F regulatory

"Form 13F Information Table Value Total: 124,753,836"

A Form 13F is a quarterly filing that large investment managers must submit to disclose their holdings in publicly traded stocks and certain other securities. It acts like a peek into the portfolios of big investors, helping other market participants see what large players are buying or selling and offering clues about investment trends, crowded trades, and potential market impact.

investment discretion financial

"these securities are held in accounts that Prosperity Bank assumed from ABNA in the merger"

information table entries regulatory

"Form 13F Information Table Entry Total: 414"

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

OMB APPROVAL

OMB Number:			3235-0006
Estimated average burden
hours per response:			23.8

Report for the Calendar Year or Quarter Ended: 03-31-2026

Check here if Amendment		Amendment Number:
This Amendment (Check only one.):		is a restatement.
		adds new holdings entries.

Institutional Investment Manager Filing this Report:
Name:	Prosperity Bancshares Inc
Address:	4295 San Felipe
	Houston, TX 77027
Form 13F File Number:	028-26579
CRD Number (if applicable):
SEC File Number (if applicable):	001-35388

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name:		Charlotte M. Rasche
Title:		Executive Vice President and General Counsel
Phone:		281-269-7199
Signature, Place, and Date of Signing:
/s/ Charlotte M. Rasche			Houston, TX	05-11-2026
[Signature]			[City, State]	[Date]
Prosperity Bancshares, Inc. (Prosperity) is filing this Form 13F on behalf of American Bank National Association (ABNA). On January 1, 2026, ABNA merged with and into Prosperity's wholly owned subsidiary Prosperity Bank. All information contained in this report reflects securities over which Prosperity Bank doing business as ABNA exercised investment discretion as of March 31, 2026. These securities are held in accounts that Prosperity Bank assumed from ABNA in the merger.

Report Type (Check only one.):
X	13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
	13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
	13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)

Form 13F Summary Page
	Report Summary:
	Number of Other Included Managers:		1
	Form 13F Information Table Entry Total:		414
	Form 13F Information Table Value Total:		124,753,836
			(round to nearest dollar)

List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state "NONE" and omit the column headings and list entries.]
	No.	Name	Form 13F File No.	CRD No. (if applicable)	SEC File No. (if applicable)	CIK
	1	American Bank National Association

FAQ

What holdings did Prosperity Bancshares (PB) report on its Form 13F?

The filing reports holdings with a total market value of $124,753,836. It states the report contains 414 positions and reflects securities over which Prosperity Bank exercised investment discretion as of March 31, 2026.

Why does the Form 13F mention a merger with American Bank National Association?

Because Prosperity Bank assumed accounts from ABNA after an January 1, 2026 merger. The filing says holdings reflect securities for which Prosperity Bank, doing business as ABNA, exercised investment discretion as of March 31, 2026.

How many other included managers are listed in the 13F filing?

The report lists one other included manager: American Bank National Association. The Form 13F summary page also shows an information table entry total of 414 entries.

Does this Form 13F disclose individual trades or portfolio intentions?

No. The filing provides a holdings snapshot—414 positions totaling $124,753,836—but it does not disclose trade dates, cost basis, or strategic intentions in the provided excerpt.