Executive Diane Bonina adds equity awards at Federal Signal (FSS)

Rhea-AI Filing Summary

Federal Signal Corp executive Diane Bonina reported multiple equity awards and related tax transactions. On 02/27/2026, she received a stock option grant for 4,224 shares at an exercise price of $116.43 per share, vesting in three equal installments on 02/27/2027, 02/27/2028, and 02/27/2029. She also received a restricted stock award of 1,396 common shares, which fully vests on 02/27/2029.

On 02/26/2026, Bonina acquired 8,316 common shares as a grant or award and disposed of 3,718 common shares in a tax-withholding transaction at $117.63 per share. Following these transactions, her directly held common stock increased to 21,059 shares. Separately, units held indirectly in the company 401(k) plan were adjusted to 664.5692 units, reflecting the issuer’s share price of $117.63 on 02/26/2026.

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider Bonina Diane

Role VP, Gen'l Counsel & Secretary

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	4,224	$116.43	$492K
Grant/Award	Common Stock	1,396	$0.00	--
Grant/Award	Common Stock	8,316	$0.00	--
Tax Withholding	Common Stock	3,718	$117.63	$437K
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (right to buy) — 4,224 shares (Direct); Common Stock — 21,059 shares (Direct); Common Stock — 664.569 shares (Indirect, held by 401(k) plan)

Footnotes (1)

1. This represents a restricted stock award. All 1,396 shares vest on 02/27/2029. Units held in the Issuer 401(k) plan, which are convertible into Issuer common stock, were adjusted from 663.6356 to 664.5692 based on the Issuer price per share of $117.63 on 02/26/2026. Options become exercisable as to 1,408 shares on 02/27/2027, 1,408 shares on 02/27/2028 and the remaining 1,408 shares on 02/27/2029.

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
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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^*

Bonina Diane

(Last) (First) (Middle)

1333 BUTTERFIELD ROAD

SUITE 500

(Street)

DOWNERS GROVE IL 60515

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FEDERAL SIGNAL CORP /DE/ [ FSS ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP, Gen'l Counsel & Secretary

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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

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

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

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	02/26/2026		A		8,316	A	$0	23,381	D
Common Stock	02/26/2026		F		3,718	D	$117.63	19,663	D
Common Stock	02/27/2026		A		1,396(1)	A	$0	21,059	D
Common Stock								664.5692(2)	I	held by 401(k) plan

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 (right to buy)	$116.43	02/27/2026		A		4,224		(3)	02/27/2036	Common Stock	4,224	$116.43	4,224	D

Explanation of Responses:

1. This represents a restricted stock award. All 1,396 shares vest on 02/27/2029.

2. Units held in the Issuer 401(k) plan, which are convertible into Issuer common stock, were adjusted from 663.6356 to 664.5692 based on the Issuer price per share of $117.63 on 02/26/2026.

3. Options become exercisable as to 1,408 shares on 02/27/2027, 1,408 shares on 02/27/2028 and the remaining 1,408 shares on 02/27/2029.

Remarks:

	Diane I. Bonina	03/02/2026
	** 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.

FAQ

What insider transactions did Diane Bonina report for FEDERAL SIGNAL CORP /DE/ (FSS)?

Diane Bonina reported equity grants and a tax transaction. She received 4,224 stock options at $116.43, 1,396 restricted shares, acquired 8,316 common shares, and had 3,718 shares withheld to cover taxes, increasing direct holdings to 21,059 shares.

What are the terms of Diane Bonina’s new stock option grant in FSS?

She received options for 4,224 shares at an exercise price of $116.43. These options vest in three equal tranches of 1,408 shares on 02/27/2027, 02/27/2028, and 02/27/2029, providing long-term, performance-linked compensation.

When do Diane Bonina’s restricted stock awards in FEDERAL SIGNAL CORP /DE/ vest?

The reported restricted stock award of 1,396 common shares vests entirely on 02/27/2029. Until that date, the shares are subject to vesting conditions, aligning the executive’s incentives with longer-term company performance.

Why did Diane Bonina dispose of 3,718 shares of FSS common stock?

The 3,718-share disposition was reported with code F, indicating shares were withheld at $117.63 per share to satisfy exercise price or tax liabilities. This is a tax-withholding disposition rather than an open-market sale.

How did Diane Bonina’s total FSS shareholdings change after these transactions?

After the reported grants and tax-withholding disposition, her directly held FSS common stock position rose to 21,059 shares. Additionally, indirect 401(k) plan units were adjusted to 664.5692 units based on a $117.63 share price.

What change occurred in Diane Bonina’s FSS 401(k) plan holdings?

Units in the issuer’s 401(k) plan were adjusted from 663.6356 to 664.5692. This adjustment reflects conversion into issuer common stock using a $117.63 per-share price on 02/26/2026, without indicating a separate buy or sell.