NSTS Bancorp director disposes of 28,670 shares

The reported post-transaction position was zero common shares and zero options after the merger converted both holdings into cash rights.

Rhea-AI Filing Summary

NSTS Bancorp, Inc. director Thomas M. Ivantic reported the disposition of 28,670 common shares on October 1, 2026, for the right to receive $14.31 per share in cash under the merger; his reported common-share holdings afterward were zero. A stock option covering 23,000 common shares was canceled in the merger and converted into a cash right based on the difference between the merger price and its $9.36 per-share exercise price; reported option holdings afterward were zero.

Insider Trade Summary

Tender Offer: 51,670 shares

Tender Offer 2 txns

Insider Ivantic Thomas M

Role Director

Type	Security	Shares	Price	Value
Tender Offer	Stock Option F2	23,000	--	--
Tender Offer	Common Stock F1	28,670	$14.31	$410K

Holdings After Transaction: Stock Option — 0 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (2)

1. F1. Pursuant to the Agreement and Plan of Merger dated 05/12/2026, each outstanding share of common stock was converted into the right to receive $14.31 in cash at the effective time of the merger.
2. F2. This option, which provided for vesting in five equal annual installments beginning June 15, 2024, was cancelled in the merger and converted into the right to receive an amount in cash equal to the product of: (i) the total number of shares of Company common stock underlying the option, multiplied by (ii) the excess of (A) $14.31, over (B) the per share exercise price for such option.

Key Figures

Common shares disposed: 28,670 shares Cash consideration: $14.31 per share Option underlying shares: 23,000 shares +3 more

6 metrics

Common shares disposed 28,670 shares October 1, 2026

Cash consideration $14.31 per share Merger consideration for common shares

Option underlying shares 23,000 shares Stock option canceled in the merger

Option exercise price $9.36 per share Stock option canceled in the merger

Common shares following transaction 0 shares Reported after the October 1, 2026 disposition

Option underlying shares following transaction 0 shares Reported after the October 1, 2026 cancellation

Key Terms

effective time, vesting, exercise price

3 terms

effective time technical

"at the effective time of the merger"

The exact clock time when a regulatory filing, approval, or corporate action formally becomes legally active; from that moment the change is binding and can be acted on. Investors care because the effective time marks when ownership, rights, trading rules, or new securities take effect — like a light switch turning on a contract or transaction — which determines when risks, benefits and market reactions begin.

vesting financial

"provided for vesting in five equal annual installments"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

exercise price financial

"the per share exercise price for such option"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did NSTS director Thomas M. Ivantic report?

On October 1, 2026, director Thomas M. Ivantic disposed of 28,670 common shares for the right to receive $14.31 per share in cash under the merger; his reported common-share holdings afterward were zero. No Rule 10b5-1 plan is reported.

How was the cash amount for Thomas M. Ivantic’s NSTS stock option calculated?

The 23,000-share option was canceled in the merger and converted into a cash amount equal to the underlying shares multiplied by the excess of $14.31 over its $9.36-per-share exercise price. Reported option holdings afterward were zero.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 10/02/2026 - 02:56 PM Accepted by SEC EDGAR 10/02/2026 - 02:56 PM Learn about SEC filing dates

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

X

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^*

Ivantic Thomas M

(Last) (First) (Middle)

700 S LEWIS AVE

(Street)

WAUKEGAN ILLINOIS 60085

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NSTS Bancorp, Inc. [ NSTS ]

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)
10/01/2026

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	10/01/2026		U		28,670	D	$14.31(1)	0	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
Stock Option	$9.36	10/01/2026		U			23,000	(2)	06/15/2033	Common Stock	23,000	(2)	0	D

Explanation of Responses:

1. Pursuant to the Agreement and Plan of Merger dated 05/12/2026, each outstanding share of common stock was converted into the right to receive $14.31 in cash at the effective time of the merger.

2. This option, which provided for vesting in five equal annual installments beginning June 15, 2024, was cancelled in the merger and converted into the right to receive an amount in cash equal to the product of: (i) the total number of shares of Company common stock underlying the option, multiplied by (ii) the excess of (A) $14.31, over (B) the per share exercise price for such option.

	/s/ Carissa H. Schoolcraft, POA	10/02/2026
	** 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)