Latest Period
Q1 2026
Security Snapshot
Winchester Bancorp, Inc./MD/ - Common Stock, $0.01 par value per share (WSBK) Institutional Ownership
CUSIP: 97269D103
13F Institutional Holders and Ownership History from Q2 2025 to Q2 2026
Institutions Reporting
19
Shares (Excl. Options)
750,531
Price
$12.70
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- Security type / class
- Equity / Common Stock, $0.01 par value per share
- Symbol
- WSBK on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 750,531
- Total 13F value
- $9,476,262
- Portfolio coverage rank
- 0%
- Share change
- -153,085
- Value change
- -$1,895,458
- Number of holders
- 19
- Shares outstanding
- 9,295,376
- SEC-reported price per share
- $13.14
- Insider filing price
- $13.14
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- WSBK - Winchester Bancorp, Inc./MD/ - Common Stock, $0.01 par value per share is tracked under CUSIP 97269D103.
- 19 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 19 to 2 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $9,476,262 to $157,680.
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
Open SEC evidence
Latest holder context comes from 19 institutions filings for Q1 2026.
Security key
97269D103
Latest holder period
Q1 2026
13F holders
19
13D/G owners
1
CIK / CUSIP context first
Open Q1 2026 holders
WSBK full holder history
Winchester Bancorp, Inc./MD/ SEC filings
Winchester Bancorp, Inc./MD/ company facts
Winchester Bancorp, Inc./MD/ insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 97269D103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
WSBK
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Winchester Bancorp, MHC | 55% | 5,112,457 | Winchester Bancorp, MHC | 30 Apr 2025 |
As of 31 Mar 2026, 19 institutional investors reported holding 750,531 shares of Winchester Bancorp, Inc./MD/ - Common Stock, $0.01 par value per share (WSBK). This represents 8.1% of the company’s total 9,295,376 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
5
Latest
Q1 2026
Rows shown
1-5 of 5
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 12,000 | $157,680 | +$124,830 | $13.14 | 2 |
| 2026 Q1 | 750,531 | $9,476,262 | -$1,895,458 | $12.70 | 19 |
| 2025 Q4 | 771,277 | $8,060,190 | +$702,908 | $10.45 | 21 |
| 2025 Q3 | 708,264 | $6,769,088 | +$839,928 | $9.55 | 22 |
| 2025 Q2 | 620,236 | $5,551,171 | +$5,551,171 | $8.95 | 18 |