What is the total ISSC share-equivalent holding after this RSU grant?

Following the 5,618 RSU grant, the director’s total direct share-equivalent holdings are 83,188. This figure reflects his position after the compensation award and helps show that the transaction is a routine equity grant rather than a reduction of his ownership stake.

Innovative Solutions (ISSC) director granted 5,618 RSUs as equity award

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Carolin Roger Anthony reported acquisition or exercise transactions in this Form 4 filing.

INNOVATIVE SOLUTIONS & SUPPORT INC director Roger Anthony Carolin received a grant of 5,618 Restricted Stock Units (RSUs) on April 16, 2026 as equity compensation. Each RSU represents one share of common stock and was granted at a price of $0.00 per unit.

The RSUs were issued under the company’s 2019 Stock-Based Incentive Compensation Plan and are scheduled to vest on the first anniversary of the grant date, as long as the director continues to serve the company. After this grant, Carolin directly holds 83,188 shares of common stock-equivalent, reflecting a routine, non-market compensation award rather than an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Carolin Roger Anthony

Role null

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	5,618	$0.00	--

Holdings After Transaction: Restricted Stock Units — 83,188 shares (Direct, null)

Footnotes (1)

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Key Figures

RSUs granted: 5,618 units Grant price per RSU: $0.00 per unit Total holdings after grant: 83,188 shares +1 more

4 metrics

RSUs granted 5,618 units Restricted Stock Units granted April 16, 2026

Grant price per RSU $0.00 per unit Equity compensation award, not open-market purchase

Total holdings after grant 83,188 shares Direct holdings following RSU award

Vesting schedule 1 year from grant RSUs vest on first anniversary of April 16, 2026

Key Terms

Restricted Stock Units, 2019 Stock-Based Incentive Compensation Plan, vest, grant, award, or other acquisition

4 terms

Restricted Stock Units financial

"The RSUs were granted pursuant to the Company's 2019 Stock-Based Incentive Compensation Plan."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2019 Stock-Based Incentive Compensation Plan financial

"The RSUs were granted pursuant to the Company's 2019 Stock-Based Incentive Compensation Plan."

vest financial

"The RSUs are scheduled to vest on the first anniversary of the grant date."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

Form 4 Insider Transactions: What Each Field Means →

04/20/2026 - 12:33 PM

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^*

Carolin Roger Anthony

(Last)

(First)

(Middle)

C/O INNOVATIVE SOLUTIONS & SUPPORT, INC.

720 PENNSYLVANIA DRIVE

(Street)

EXTON

PENNSYLVANIA

19341

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
INNOVATIVE SOLUTIONS & SUPPORT INC [ ISSC ]

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)
04/16/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	04/16/2026		A		5,618⁽¹⁾	A	$0.00	83,188	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The RSUs were granted pursuant to the Company's 2019 Stock-Based Incentive Compensation Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are scheduled to vest on the first anniversary of the grant date, subject to continued service by the reporting person.

	/s/ Roger Anthony Carolin	04/20/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did ISSC director Roger Anthony Carolin report?

ISSC director Roger Anthony Carolin reported receiving a grant of 5,618 Restricted Stock Units. These units were awarded as stock-based compensation at $0.00 per unit and increase his direct equity-based holdings in the company, rather than reflecting an open-market purchase or sale.

How many ISSC Restricted Stock Units were granted to the director?

The director was granted 5,618 Restricted Stock Units in Innovative Solutions & Support Inc. Each RSU represents the right to receive one share of common stock, subject to vesting conditions tied to continued service with the company after the grant date.

When do the newly granted ISSC RSUs vest for the director?

The 5,618 RSUs granted to the ISSC director are scheduled to vest on the first anniversary of the April 16, 2026 grant date. Vesting is conditioned on the director’s continued service with the company through that one-year period under the 2019 incentive plan.

Was the ISSC director’s RSU grant an open-market stock purchase?

No, the 5,618 RSUs were granted as compensation under ISSC’s 2019 Stock-Based Incentive Compensation Plan at $0.00 per unit. This means the director did not buy shares on the open market; instead, he received a stock-based award subject to vesting.