Director adds Winchester Bancorp (WSBK) stock in open-market purchases

Rhea-AI Filing Summary

Winchester Bancorp director John Ingalls Snow III bought additional stock in the bank. On May 7, 2026, he made open-market purchases of 1,725 shares of Winchester Bancorp common stock at prices of $12.77 and $12.79 per share. After these transactions, his directly held stake rose to 19,735 shares. He also reports indirect holdings of 2,500 shares held by a company and 200 shares held by a child.

Insider Trade Summary

Net Buyer: 1,725 shares ($22,059)

Net Buy 4 txns

Insider Snow John Ingalls III

Role null

Bought 1,725 shs ($22K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	1,525	$12.79	$20K
Purchase	Common Stock	200	$12.77	$3K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 19,535 shares (Direct, null); Common Stock — 200 shares (Indirect, By Child)

Footnotes (1)

Key Figures

Open-market purchase shares: 1,725 shares Purchase price 1: $12.77 per share Purchase price 2: $12.79 per share +3 more

6 metrics

Open-market purchase shares 1,725 shares Common Stock bought on May 7, 2026

Purchase price 1 $12.77 per share Common Stock open-market buy on May 7, 2026

Purchase price 2 $12.79 per share Common Stock open-market buy on May 7, 2026

Direct holdings after trades 19,735 shares Common Stock directly owned after May 7, 2026

Indirect holdings by company 2,500 shares Common Stock held indirectly "By Company"

Indirect holdings by child 200 shares Common Stock held indirectly "By Child"

Key Terms

Common Stock, open-market purchase, indirect ownership

3 terms

Common Stock financial

"security_title: "Common Stock" for all reported holdings"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open-market purchase financial

"transaction_action: "open-market purchase" with code P"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

indirect ownership financial

"ownership_type: "indirect" with nature_of_ownership "By Company" and "By Child""

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Snow John Ingalls III

(Last) (First) (Middle)

661 MAIN STREET

(Street)

WINCHESTER MASSACHUSETTS 01890

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Winchester Bancorp, Inc./MD/ [ WSBK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/07/2026		P		1,525	A	$12.79	19,535	D
Common Stock	05/07/2026		P		200	A	$12.77	19,735	D
Common Stock								200	I	By Child
Common Stock								2,500	I	By Company

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ John Ingalls Snow III	05/07/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider activity did Winchester Bancorp (WSBK) disclose in this Form 4?

Winchester Bancorp disclosed that director John Ingalls Snow III bought 1,725 shares of common stock in open-market transactions on May 7, 2026, and reported updated direct and indirect share holdings.

How many Winchester Bancorp (WSBK) shares did the director buy and at what prices?

The director purchased 1,725 shares of Winchester Bancorp common stock. The trades were executed at prices of $12.77 and $12.79 per share in open-market transactions on May 7, 2026.

What are John Ingalls Snow III’s direct holdings in Winchester Bancorp (WSBK) after the transactions?

Following the May 7, 2026 purchases, director John Ingalls Snow III directly holds 19,735 shares of Winchester Bancorp common stock, as reported in the Form 4 filing’s post-transaction ownership column.

What indirect Winchester Bancorp (WSBK) holdings are reported for the director?

The filing shows indirect ownership of 2,500 shares described as held “By Company” and 200 shares held “By Child.” These entries update indirect holdings rather than recording new buy or sell transactions.

What transaction code was used for the Winchester Bancorp (WSBK) insider purchases?

The open-market purchases by director John Ingalls Snow III are reported with transaction code P, indicating a purchase in an open market or private transaction of Winchester Bancorp common stock.