NYSEFinancialsSavings Institutions, Not Federally CharteredHUDSON, MA

Avidia Bancorp, Inc. AVBC

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Estimated market cap $438.23M19.45M shares, shares as of Nov 12, 2026CIK 2058758

Insider trades, 12 mo

50 buys · 1 sell

$20.9K sold, open market

Congress trades, 24 mo

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No disclosed trades

13F holders, Q3 2026

25.3% of shares · 19 added

13F holders

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Lobbying, 12 mo

—

No lobbying filings

Federal contracts, 12 mo

—

None matched

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IPO prospectus

Updated

Avidia Bancorp, Inc.’s initial public offering: where it stands and what the registration statement says.

Updated · Proposed ticker AVBC, NYSE · First filed Mar 14, 2025

Read from the S-1/A filed May 6, 2025 · Read it on sec.gov ↗

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AI summary of the prospectus. Written by AI from the parts of the prospectus listed in the filing, and checked against its text. This is information, not investment advice.

All filings of this IPO Read the S-1/A on sec.gov ↗

IPO prospectus

Avidia Bancorp, Inc.’s initial public offering: where it stands and what the registration statement says.

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Latest 10-Q

Q3 2026

What changed in Avidia Bancorp, Inc.'s latest quarterly report, compared with the one before.

Filed Nov 12, 2026 · Quarter ended Sep 30, 2026

AI No AI summary for this 10-Q: the draft did not pass our accuracy checks.

Compared with the 10-Q for the quarter ended Jun 30, 2026. Sections compared: management's discussion, risk factors, legal proceedings and controls and procedures.

Read the 10-Q on sec.gov ↗Filing index ↗

Latest 10-Q

What changed in Avidia Bancorp, Inc.'s latest quarterly report, compared with the one before.

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Insider trades

51 in 12 mo

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

Recent insider trades

Micheal Neil Flanigan Director	Nov 5 Form 4 ↗	Sale	−$20.9K 900 sh @ $23.24	-3.3%
Michael Dennis Murphy Director	Sep 14 Form 4 ↗	Buy	+$110.6K 5,000 sh @ $22.12	+2.4%
Jonathan Michael Nelson CFO and Treasurer	Sep 3 Form 4 ↗	Buy	+$99.9K 4,500 sh @ $22.19	+4.6%
Joseph F. Grimaldo Director	Aug 26 Form 4 ↗	Buy	+$110.1K 5,000 sh @ $22.02	+3.8%
Thomas Doane EVP- Human Resources	Aug 17 Form 4 ↗	Buy	+$38.5K 1,726 sh @ $22.31	+2.9%

All AVBC insider trades →Planned sales (Form 144): see notices

Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

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13F holders

4.93M shares

56 funds report AVBC. Values checked against market prices.

Funds own 36% of shares (Q2 2026)

81 funds hold the stock.

Q3 2026: 25% · 5,560 of ~8,900 funds reported so far

Q3 202528%
Q4 202531%
Q1 202633%
Q2 202636%
Q3 2026 (so far)25%

Q3 2026. 13 new, 19 added to, 12 trimmed, 39 exited since Q2 2026.

Top 13F holders
#
1	BlackRock, Inc. 13F ↗	1.26M	$27.3M	+9.6%
2	Vanguard Capital Management LLC 13F ↗	786,740	$17.0M	-1.8%
3	Geode Capital Management, LLC 13F ↗	430,464	$9.3M	-2.7%
4	State Street Corp 13F ↗	336,910	$7.3M	+34.1%
5	Renaissance Technologies LLC 13F ↗	202,100	$4.4M	+73.0%
6	Morgan Stanley 13F ↗	189,261	$4.1M	+26.9%
7	Marshall Wace, LLP 13F ↗	184,086	$4.0M	+25.9%
8	Hennessy Advisors Inc 13F ↗	157,000	$3.4M	unchanged
9	Panagora Asset Management Inc 13F ↗	140,748	$3.0M	+214.9%
10	Vanguard Portfolio Management LLC 13F ↗	125,058	$2.7M	+1.6%

Download CSV Every fund that holds AVBC, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.

13F holders

Funds that report this stock, checked against market prices.

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Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

No recent congressional trades for this company.

Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

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Lobbying

What Avidia Bancorp, Inc. and its lobbying firms report each quarter.

No recent lobbying filings for this company.

Lobbying

What Avidia Bancorp, Inc. and its lobbying firms report each quarter.

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Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

Funds holding the stock

Shares they report

Funds holding the stock by quarter

Q3 2025	37	—	5.67M	$84.7M
Q4 2025	53	+16	6.32M	$106.2M
Q1 2026	66	+13	6.54M	$128.3M
Q2 2026	82	+16	7.18M	$150.7M
Q3 2026	56	-26	4.93M	$106.5M

Each point is a quarter-end, from Q3 2025 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.

Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.

The history follows the company's current CUSIP number (05369T100). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q3 2025) can be later than the stock's first appearance in 13F reports.

Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.

A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

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More filings and data

Each opens the table.

Ownership stakes1 in 12 mo 8-K events5 in 90 days PatentsNone on record Short interestFINRA · updated Oct 15 Planned insider salesNone in 12 mo Executive payNone on record Wikipedia attentionNone on record SEC enforcementNone on record IPO history1 registration Ownership stakes…8-K events…Patents…Short interest…Planned insider sales…Executive pay…Wikipedia attention…SEC enforcement…

About the company

The basics from the company’s SEC registration.

Legal name: Avidia Bancorp, Inc.
Address: 42 MAIN STREET, HUDSON, MA 01749
Phone: 800-508-2265
Fiscal year ends: Dec 31
Filer category: Non-accelerated filer, smaller reporting company, emerging growth company
Listed as: AVBC (NYSE)
SEC filings: All filings on SEC EDGAR ↗

About the company

The basics from the company’s SEC registration.

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$22.53−$0.05 (−0.22%) Nov 13 close

1M3M1Y

Oct 13, 2026Low $21.83 · High $23.61Nov 13, 2026

Aug 13, 2026Low $21.53 · High $23.61Nov 13, 2026

Nov 13, 2025Low $14.94 · High $23.61Nov 13, 2026

Congress purchase Congress sale Insider sale over $1M

Adjusted for stock splits; not for dividends. Where prices come from.

Live chart

Intraday and historical prices from TradingView. Quotes may be delayed.

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Information, not investment advice. Company matching is automatic; check the source before relying on one row.