NB Bancorp, Inc.

SecurityNBBK / NB Bancorp, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership70,772 shares
Latest Disclosed Value $ 1,402,701
Barclays Plc reports 33.84% increase in ownership of NBBK / NB Bancorp, Inc.

On February 13, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 70,772 shares of NB Bancorp, Inc. (US:NBBK) valued at $1,402,701 USD as of December 31, 2025. The entity filed a previous 13F-HR/A on March 31, 2026 disclosing 52,878 shares of NB Bancorp, Inc.. This represents a change in shares of 33.84% during the quarter. The current value of the position is $1,409,071 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F NB BANCORP COM 63945M107 70,772 17,894 33.84 1,403 50.27 0.0003
2026-03-31 2025-09-30 13F/A-3 NB BANCORP COM 63945M107 52,878 -29,024 -35.44 933 -36.18 0.0002
2026-03-19 2025-09-30 13F/A-2 NB BANCORP COM 63945M107 81,114 -788 1,505 0.0004
2025-11-12 2025-09-30 13F NB BANCORP COM 63945M107 52,878 -29,024 933 0.0002
2026-02-27 2025-06-30 13F/A-2 NB BANCORP COM 63945M107 81,902 22,570 38.04 1,463 36.38 0.0003
2025-08-14 2025-06-30 13F/A-1 NB BANCORP COM 63945M107 81,902 22,570 1 0.0003
2025-08-13 2025-06-30 13F NB BANCORP COM 63945M107 81,902 22,570 1 0.0001
2026-03-17 2025-03-31 13F/A-1 NB BANCORP COM 63945M107 59,332 -18,112 -23.39 1,072 -23.32 0.0003
2025-05-15 2025-03-31 13F NB BANCORP COM 63945M107 59,332 -18,112 1 0.0003
2026-03-19 2024-12-31 13F/A-1 NB BANCORP COM 63945M107 77,444 -3,670 -4.52 1,399 -7.11 0.0004
2025-02-13 2024-12-31 13F NB BANCORP COM 63945M107 77,444 -3,670 1 0.0004
2026-03-31 2024-09-30 13F/A-2 NB BANCORP COM 63945M107 81,114 34,235 73.03 1,505 113.17 0.0004
2024-11-19 2024-09-30 13F/A-1 NB BANCORP COM 63945M107 81,114 34,235 2 0.0004
2024-11-15 2024-09-30 13F NB BANCORP COM 63945M107 81,114 34,235 2 0.0004
2026-03-23 2024-06-30 13F/A-1 NB BANCORP COM 63945M107 46,879 46,879 707 0.0002
2024-08-14 2024-06-30 13F NB BANCORP COM 63945M107 46,879 46,879 1 0.0002
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.