Security Snapshot

Avidia Bancorp, Inc. - Common Stock (AVBC) Institutional Ownership

CUSIP: 05369T100

13F Institutional Holders and Ownership History from Q3 2025 to Q3 2026

13F reference period

Q3 2026

Institutions Reporting

43

Shares (Excl. Options)

3.27MFull value: 3,270,741 · shares · 30 Sep 2026

Price

$21.60

The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.

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Latest holder snapshot 5 signals
Portfolio coverage rank
0%
Share change
-189,289
Value change
-$3,738,416
Number of holders
43
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
20,204,737
SEC-reported price per share
$22.20
Insider filing price
$22.20
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source

Key facts

  • AVBC - Avidia Bancorp, Inc. - Common Stock is tracked under CUSIP 05369T100.
  • 43 institutions reported positions in Q3 2026.
  • 3 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 81 to 43 between Q2 2026 and Q3 2026.
  • SEC-reported value moved from
    $149.65MFull value: $149,650,112 · USD · 30 Jun 2026
    to
    $70.7MFull value: $70,699,260 · USD · 30 Sep 2026
    .

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 43 institutions filings for Q3 2026.

Open SEC evidence

Security key

05369T100

13F reference period

Q3 2026

13F holders

43

13D/G owners

3

CIK / CUSIP context first

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
3
Security
AVBC
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Avidia Bank Employee Stock Ownership Plan Trust 8% $23,995,134 1,606,100 Avidia Bank Employee Stock Ownership Plan Trust 30 Sep 2025
T. Rowe Price Investment Management, Inc. 6.1% $18,200,655 1,218,250 T. Rowe Price Investment Management, Inc. 30 Sep 2025
BlackRock, Inc. 5.7% $24,173,553 1,151,670 BlackRock, Inc. 30 Jun 2026
As of 30 Sep 2026, 43 institutional investors reported holding
3.27MFull value: 3,270,741 · shares · 30 Sep 2026
shares of Avidia Bancorp, Inc. - Common Stock (AVBC). This represents 16% of the company’s total
20.2MFull value: 20,204,737 · shares · Stored outstanding share count
outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
16%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD CAPITAL MANAGEMENT LLC 3.9% 786,740 -1.8% 0% $16,993,584
GEODE CAPITAL MANAGEMENT, LLC 2.1% 430,464 -2.7% 0% $9,300,188
STATE STREET CORP 1.7% 336,910 +34% 0% $7,277,256
RENAISSANCE TECHNOLOGIES LLC 1% 202,100 +73% 0.01% $4,365,360
MORGAN STANLEY 0.94% 189,261 +27% 0% $4,088,037
MARSHALL WACE, LLP 0.91% 184,086 +26% 0% $3,976,258
HENNESSY ADVISORS INC 0.78% 157,000 0% 0.13% $3,391,200
PANAGORA ASSET MANAGEMENT INC 0.7% 140,748 +215% 0.01% $3,040,157
VANGUARD PORTFOLIO MANAGEMENT LLC 0.62% 125,058 +1.6% 0% $2,701,253
VANGUARD FIDUCIARY TRUST CO 0.59% 119,039 -4.5% 0% $2,571,242
COMMONWEALTH EQUITY SERVICES, LLC 0.43% 87,239 -5.7% 0% $1,884,350
WHITE PINE CAPITAL LLC 0.43% 86,223 -0.56% 0.44% $1,862,417
Polaris Capital Management, LLC 0.31% 62,600 0% 0.14% $1,352,160
FRANKLIN TEMPLETON INC 0.23% 46,593 -32% 0% $1,055,797
BNP PARIBAS FINANCIAL MARKETS 0.21% 43,306 0% $935,410
STRS OHIO 0.21% 42,800 +1089% 0% $924,480
Arbiter Partners Capital Management LLC 0.16% 32,800 0% 0.31% $708,480
RAYMOND JAMES FINANCIAL INC 0.16% 31,800 0% $686,880
Oppenheimer & Close, LLC 0.13% 26,502 0% 0.35% $572,443
DEUTSCHE BANK AG\ 0.08% 15,601 -13% 0% $336,982
Diversified Trust Co 0.07% 13,771 0.01% $297,454
AMERICAN CENTURY COMPANIES INC 0.07% 13,432 0% 0% $290,131
ROCKLAND TRUST CO 0.06% 12,646 0% 0.01% $273,154
Farther Finance Advisors, LLC 0.06% 12,024 +0.2% 0% $259,718
EntryPoint Capital, LLC 0.06% 11,528 0.07% $249,005

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
5
Headline period
Q3 2026
Rows shown
1-5 of 5
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q3 3,270,741 $70,699,260 -$3,738,416 $21.60 43
2026 Q2 7,130,206 $149,650,112 +$15,556,943 $20.99 81
2026 Q1 6,469,445 $126,869,134 +$14,520,281 $19.67 65
2025 Q4 5,827,215 $97,947,817 +$2,998,695 $16.81 52
2025 Q3 5,667,696 $84,677,177 +$84,677,177 $14.94 37
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