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Rock Rivers Bancorp Financials, FR Y-9SP Data and Filings

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Bank Holding Company Iowa RSSD 1827914 FRS Est. 1990

Rock Rivers Bancorp is a bank holding company based in Iowa with $352.9M in total consolidated assets as of June 30, 2026, on the consolidated assets memorandum line of its FR Y-9SP, a parent-company-only report. It owns 1 bank that files a call report: Frontier Bank ($349.2M in assets).

Holding companies with less than $3 billion in assets file the semiannual FR Y-9SP rather than the quarterly FR Y-9C. The FR Y-9SP reports the parent company on its own, apart from one consolidated assets line, so deposits, loans, capital ratios and quarterly earnings sit in the bank's call report: see Frontier Bank.

Key Financials FR Y-9SP, as of June 30, 2026

Total consolidated assets
$352.9M
Total assets, parent only
$26.7M
Total equity, parent only
$17.5M
Net income, parent only (first half of 2026)
$531K

Source: FR Y-9SP for June 30, 2026. Total consolidated assets covers the company and every subsidiary (Memoranda item 1, BHSP8519). The parent-only lines count the holding company itself, which carries its banks as an investment, and its net income is year to date. Bank-level figures in the tables below come from each bank's own call report.

Bank Subsidiaries 1 bank held directly or through another holding company

Bank Charter State Total assets (call report) Share of bank assets Held through
Frontier Bank Federal Savings Bank SD $349.2M 100.0% Held directly

Questions About Rock Rivers Bancorp

What are Rock Rivers Bancorp's total assets?

Rock Rivers Bancorp reported $352.9M in total consolidated assets as of June 30, 2026, the figure it entered on the consolidated assets memorandum line of its FR Y-9SP filing with the Federal Reserve. The FR Y-9SP is a parent-company-only report that carries no consolidated balance sheet, and holding companies with less than $3 billion in assets file it semiannually instead of the quarterly FR Y-9C.

How many banks does Rock Rivers Bancorp own?

Rock Rivers Bancorp owns 1 bank that files a call report: Frontier Bank.

Who owns Frontier Bank?

Frontier Bank is owned by Rock Rivers Bancorp. The bank reported $349.2M in total assets on its latest call report.

Where can I find Rock Rivers Bancorp's FR Y-9SP?

Rock Rivers Bancorp files the FR Y-9SP with the Federal Reserve every six months, as of June 30 and December 31. The reports are public on the FFIEC National Information Center under RSSD ID 1827914. This page summarizes the FR Y-9SP for Q2 2026.

Filing Details fiscal year and SEC registration

Fiscal year end
December 31
Ticker
—
SEC CIK
—
SEC filings
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Organization Map select + to expand a subsidiary's own holdings

Holding company Reporting bank Nonbank subsidiary
  • Rock Rivers Bancorp
    Holding Company IA RSSD 1827914
    $352.9M

Direct Subsidiaries 3 active direct subsidiaries

Entity Type State Total Assets Share of bank subsidiary assets
Frontier Bank · 2218443 Federal Savings Bank SD $349.2M 100.0%
Rock Rivers Statutory Trust II · 4531771 Nonbank Subsidiary IA — —
State Bank Insurance & Realty, Inc. · 4389833 Nonbank Subsidiary IA — —

Share of bank subsidiary assets divides each bank's total assets by the combined assets of the bank subsidiaries listed. Nonbank subsidiaries are not counted.

Regulator records: FFIEC NIC profile (RSSD 1827914)