What is the 13F Pro Quality Score for NBBK?

13F Pro ranks NB Bancorp, Inc. (NBBK) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View NBBK's current score at https://13fpro.ai/research/NBBK (free sign-up required for the full ranking).

Which hedge funds own the most NBBK stock?

Based on the most recent Form 13F-HR filings on SEC EDGAR, the largest reported institutional holders of NBBK include BlackRock,, Pertento Partners LLP, VANGUARD CAPITAL MANAGEMENT. Holdings are reported quarterly within 45 days of quarter-end and updated on https://13fpro.ai/research/NBBK as soon as new 13F filings post.

Where does 13F Pro source NBBK data?

All NB Bancorp, Inc. fundamentals and ownership data come directly from SEC EDGAR. NB Bancorp, Inc. files with the SEC under CIK 1979330. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is NBBK in?

NB Bancorp, Inc. (NBBK) is classified in the Financials sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/financials.

How often is NBBK research updated on 13F Pro?

NBBK's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

NB Bancorp, Inc.(NBBK)Stock Analysis

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13F Pro Quality Score

Not in ranked universe

Pending next ranking run

This company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. Rankings refresh on Jan 1, Apr 1, Jul 1, Oct 1.

Financial data, filings, and institutional holdings below are still tracked in full — only the proprietary quality composite is unavailable for this name.

NBBK Stock Analysis & AI Quality Score

AI stock analysis and institutional research for NB Bancorp, Inc. (NBBK), a Financials sector company. NBBK is not currently included in 13F Pro's AI-ranked quality universe — this company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. rankings refresh on jan 1, apr 1, jul 1, oct 1. Based on the latest XBRL financial filings (Q1 2026), NB Bancorp, Inc. reports quarterly revenue of $69.4M, net income of $15.0M, free cash flow of $25.3M. Top institutional holders of NBBK by reported 13-F value include BlackRock,, Pertento Partners LLP, VANGUARD CAPITAL MANAGEMENT, based on the most recent SEC filings. NBBK trades on the Nasdaq exchange and files with the SEC under CIK 1979330. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate NBBK daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for NB Bancorp, Inc. directly from SEC EDGAR.

Revenue

Q1 2026

$69.4M

Net Income

Q1 2026

$15.0M

Free Cash Flow

Q1 2026

$25.3M

ROIC

Q1 2026

2.4%

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Net Income

-67.3% YoY

$9.8MFY 2023

FY22 $30.1MFY23 $9.8M

EPS (Diluted)

$0.23FY 2023

FY22 —FY23 $0.23

Total Assets

+26.2% YoY

$4.53BFY 2023

FY22 $3.59BFY23 $4.53B

Op. Cash Flow

+33.2% YoY

$52.9MFY 2023

FY22 $39.7MFY23 $52.9M

Metric	FY 2023	FY 2022
Net Income	$9.8M -67.3%	$30.1M
EPS (Diluted)	$0.23	—
Total Assets	$4.53B +26.2%	$3.59B
Operating Cash Flow	$52.9M +33.2%	$39.7M

AI Insight: NBBK Financial Trends

Equity surged to $859M in Q4 2025, likely reflecting a capital raise, while net income and operating cash flow rebounded strongly in Q1 2026.

• Net income recovered to $15M in Q1 2026 after dropping to $8M in Q4 2025, matching the Q2–Q3 2025 run-rate.

• Equity jumped from $737M in Q3 2025 to $859M in Q4 2025, a $122M increase suggesting a capital event.

• Operating cash flow rebounded to $27M in Q1 2026 after collapsing to near zero in Q4 2025.

⚠ Q4 2025 operating cash flow fell to approximately $0M — first near-zero reading in the observed period; cause unclear.

⚠ Revenue data is absent across all periods, limiting margin and growth analysis for a complete fundamental view.

⚠ Equity declined from $765M in Q4 2024 to $737M by Q3 2025 before the Q4 jump — three quarters of erosion worth monitoring.

AI Insight: NBBK Ratio Trends

ROIC recovered to 9.7% in Q1 2026 after a sharp Q4 2025 dip, but TTM ROE of 6.2% remains modest and below peak quarterly levels.

• ROIC improved from 6.3% in Q2 2024 to a peak of 10.8% in Q3 2025, reflecting a meaningful multi-quarter efficiency improvement.

• ROA climbed from 0.7% in Q3 2024 to 1.2% in Q4 2024, then stabilized in the 1.0–1.1% range through Q3 2025.

• Q4 2025 saw a sharp deterioration: ROE collapsed to 3.6% and ROA fell to 0.4%, the weakest quarterly readings in the dataset.

• Q1 2026 showed partial recovery with ROE at 7.1% and ROIC at 9.7%, though neither has regained Q3 2025 peaks.

⚠ Q4 2025 ROE and ROA plunged to 3.6% and 0.4% — nature of that one-quarter shock (credit event, charge-off?) warrants close scrutiny.

⚠ TTM ROE of 6.2% is dragged down by Q4 2025 weakness; sustained Q1 2026-level performance is needed to rebuild trailing returns.

⚠ ROIC has not yet reclaimed its Q3 2025 high of 10.8%; momentum of recovery through mid-2026 will be a key inflection signal.

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Available Research

13F Pro tracks comprehensive data for NB Bancorp, Inc. including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of NBBK

BlackRock, Inc.
$65.0M3,084,222 sh
Pertento Partners LLP
$46.5M2,206,666 sh
VANGUARD CAPITAL MANAGEMENT LLC
$35.9M1,703,928 sh
AltraVue Capital, LLC
$27.5M1,304,080 sh
STATE STREET CORP
$27.3M1,293,538 sh
GEODE CAPITAL MANAGEMENT, LLC
$23.2M1,098,930 sh
WELLINGTON MANAGEMENT GROUP LLP
$15.0M710,000 sh
GOLDMAN SACHS GROUP INC
$14.6M691,668 sh
DIMENSIONAL FUND ADVISORS LP
$11.0M522,384 sh
Nuveen, LLC
$10.3M488,033 sh

Fund	Value	Shares
BlackRock, Inc.	$65.0M	3,084,222
Pertento Partners LLP	$46.5M	2,206,666
VANGUARD CAPITAL MANAGEMENT LLC	$35.9M	1,703,928
AltraVue Capital, LLC	$27.5M	1,304,080
STATE STREET CORP	$27.3M	1,293,538
GEODE CAPITAL MANAGEMENT, LLC	$23.2M	1,098,930
WELLINGTON MANAGEMENT GROUP LLP	$15.0M	710,000
GOLDMAN SACHS GROUP INC	$14.6M	691,668
DIMENSIONAL FUND ADVISORS LP	$11.0M	522,384
Nuveen, LLC	$10.3M	488,033

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Is NBBK a good stock to buy?

13F Pro's AI-powered analysis of NB Bancorp, Inc. (NBBK) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Financials sector (listed on Nasdaq). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for NBBK are available on the NBBK stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing.

Which hedge funds own NBBK?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling NBBK. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of NB Bancorp, Inc.'s investment landscape.