Director boosts First Keystone (FKYS) stake with 548-share open-market buy

Rhea-AI Filing Summary

FIRST KEYSTONE CORP director Michael L. Jezewski bought additional company stock in the open market. On May 27, 2026, he made three open-market purchases totaling 548 shares of First Keystone Corporation common stock at prices between $17.895 and $17.98 per share.

After these trades, he directly holds 44,404.817 shares of common stock. The filing also notes that the total shares reported are reduced by 325.330 shares that were previously reported as indirectly held for his son, for which he is no longer custodian.

Insider Trade Summary

Net Buyer: 548 shares ($9,840)

Net Buy 3 txns

Insider Jezewski Michael L

Role null

Bought 548 shs ($10K)

Type	Security	Shares	Price	Value
Purchase	First Keystone Corporation common stock	334	$17.97	$6K
Purchase	First Keystone Corporation common stock	109	$17.895	$2K
Purchase	First Keystone Corporation common stock	105	$17.98	$2K

Holdings After Transaction: First Keystone Corporation common stock — 44,404.817 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Total shares bought: 548 shares First purchase price: $17.9800 per share Second purchase price: $17.8950 per share +3 more

6 metrics

Total shares bought 548 shares Open-market purchases on May 27, 2026

First purchase price $17.9800 per share 105-share open-market purchase

Second purchase price $17.8950 per share 109-share open-market purchase

Third purchase price $17.9700 per share 334-share open-market purchase

Direct holdings after trades 44,404.817 shares Common stock held directly after May 27, 2026

Indirect shares removed 325.330 shares Previously reported as indirectly held for his son

Key Terms

open-market purchase, non-derivative, Purchase in open market or private transaction, indirectly held

4 terms

open-market purchase financial

"transaction_action: "open-market purchase""

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.

non-derivative financial

"transaction_type: "non-derivative" for common stock trades"

Purchase in open market or private transaction financial

"transaction_code_description: "Purchase in open market or private transaction""

indirectly held financial

"previously reported as indirectly held for his son"

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^*

Jezewski Michael L

(Last) (First) (Middle)

111 WEST FRONT ST

PO BOX 289

(Street)

BERWICK PENNSYLVANIA 18603

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FIRST KEYSTONE CORP [ FKYS ]

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)
05/27/2026

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
First Keystone Corporation common stock	05/27/2026		P		334	A	$17.97	44,404.817	D
First Keystone Corporation common stock	05/27/2026		P		109	A	$17.895	44,513.817	D
First Keystone Corporation common stock	05/27/2026		P		105	A	$17.98	44,618.817(1)	D

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:

1. The total shares reporting with this filing is reduced by 325.330 shares previously reported as indirectly held for his son and for which he is no longer custodian.

	Michael L. Jezewski	05/28/2026
	** 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 transaction did FIRST KEYSTONE CORP (FKYS) report for Michael L. Jezewski?

FIRST KEYSTONE CORP reported that director Michael L. Jezewski bought 548 shares of common stock in three open-market transactions on May 27, 2026, at prices around $17.90 per share, increasing his directly held stake in the company.

How many FIRST KEYSTONE CORP (FKYS) shares does Michael L. Jezewski hold after this Form 4?

After the reported trades, Michael L. Jezewski directly holds 44,404.817 shares of First Keystone Corporation common stock. This figure reflects his position following the May 27, 2026 open-market purchases disclosed in the Form 4 filing.

At what prices did Michael L. Jezewski buy FKYS shares in this Form 4?

He purchased First Keystone Corporation common stock at per-share prices of $17.9800, $17.8950, and $17.9700. These three open-market transactions on May 27, 2026 together account for 548 shares acquired.

What is the total number of FKYS shares Michael L. Jezewski bought in this filing?

The Form 4 shows that Michael L. Jezewski bought a total of 548 shares of First Keystone Corporation common stock. These shares were acquired across three separate open-market purchases on May 27, 2026.

What does the footnote about 325.330 FKYS shares mean in Michael L. Jezewski’s Form 4?

The footnote explains that the total shares reported are reduced by 325.330 shares previously reported as indirectly held for his son. He is no longer custodian for those shares, so they are no longer included in his reported holdings.

Were Michael L. Jezewski’s FKYS transactions open-market purchases or another type?

They were open-market purchases. The Form 4 lists transaction code P and describes each trade as a “Purchase in open market or private transaction,” indicating standard non-derivative stock purchases of First Keystone Corporation common shares.