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  4. [Form 4] FEDERAL SIGNAL CORP /DE/ Insider Trading Activity

Federal Signal Corp (NYSE: FSS) insider sells 19,264 shares

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Diane Bonina, Vice President, General Counsel & Secretary of Federal Signal, exercised stock options for 8,406 shares at $35.8000 and 6,450 shares at $51.8100 on August 4, 2026, receiving common stock. She sold a total of 19,264 common shares in multiple open-market or private transactions on August 3–4 at reported prices including $128.7495, $130.4519, $130.4118 and $131.0500 per share. Indirect holdings in the issuer’s 401(k) plan were adjusted to 665.1375 units, convertible into common stock, based on a $129.12 share price on August 3, 2026.

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Insights

Analyzing...

Insider Bonina Diane
Role VP, Gen'l Counsel & Secretary
Sold 19,264 shs ($2.51M)
Approx. gross sale proceeds $2.51M
Approx. exercise cost $635K
Type Security Shares Price Value
Exercise Stock Option (right-to-buy) F4 8,406 $0.00 $0.00
Exercise Stock Option (right-to-buy) F5 6,450 $0.00 $0.00
Exercise Common Stock 8,406 $35.80 $301K
Sale Common Stock F1 8,306 $130.4519 $1.08M
Sale Common Stock 100 $131.05 $13K
Exercise Common Stock 6,450 $51.81 $334K
Sale Common Stock F2 6,350 $130.4118 $828K
Sale Common Stock 100 $131.05 $13K
Sale Common Stock 4,408 $128.7495 $568K
holding Common Stock F3 -- -- --
Holdings After Transaction: Stock Option (right-to-buy) — 0 shares (Direct); Common Stock — 15,689 shares (Direct); Common Stock — 665.1375 shares (Indirect, held by 401(k) plan)
Footnotes (5)
  1. F1. This transaction was executed in multiple trades at prices ranging from $130.00 to $130.80; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC, Federal Signal Corporation, or a security holder of Federal Signal Corporation.
  2. F2. This transaction was executed in multiple trades at prices ranging from $130.01 to $130.97; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC, Federal Signal Corporation, or a security holder of Federal Signal Corporation.
  3. F3. Units held in the Issuer 401(k) plan, which are convertible into Issuer common stock, were adjusted from 664.8677 to 665.1375 based on the Issuer price per share of $129.12 on 08/03/2026.
  4. F4. The option vested in three equal installments on May 4, 2023, 2024, and 2025.
  5. F5. The option vested in three equal installments on May 4, 2024, 2025, and 2026.
Shares sold 19,264 shares of Common Stock Aggregate shares sold on 2026-08-03 and 2026-08-04
Options exercised 14,856 shares underlying Stock Options Total derivative shares exercised on 2026-08-04
Option exercise price $35.8000 per share Exercise price for 8,406-share Stock Option expiring 2032-05-04
Option exercise price $51.8100 per share Exercise price for 6,450-share Stock Option expiring 2033-05-04
Weighted average sale price $130.4519 per share Sale of 8,306 shares on 2026-08-04; trades ranged from $130.00 to $130.80
Weighted average sale price $130.4118 per share Sale of 6,350 shares on 2026-08-04; trades ranged from $130.01 to $130.97
401(k) plan units 665.1375 units Units in Issuer 401(k) plan convertible into common stock after adjustment on 2026-08-03
Stock Option (right-to-buy) financial
"Reported security_title as "Stock Option (right-to-buy)" exercised into Common Stock"
weighted average sale price financial
"Footnotes F1 and F2 state the price reflects the weighted average sale price"
Issuer 401(k) plan financial
"Footnote F3 refers to units held in the Issuer 401(k) plan"
convertible into Issuer common stock financial
"Footnote F3 notes units are convertible into Issuer common stock"

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FAQ

What transactions did Federal Signal (FSS) insider Diane Bonina report on August 4, 2026?
She exercised stock options for 14,856 shares (8,406 at $35.8000 and 6,450 at $51.8100), receiving common stock, and on August 4 sold several blocks of Federal Signal common shares at prices around $130–$131 per share in open-market or private transactions.

How many Federal Signal (FSS) shares did Diane Bonina sell in this Form 4?
She sold 19,264 shares of common stock in total. The sales occurred on August 3–4, 2026 at reported prices including $128.7495, $130.4519, $130.4118 and $131.0500 per share, with some prices disclosed as weighted averages over multiple trades.

What option exercises for Federal Signal (FSS) stock did Diane Bonina disclose?
On August 4, 2026 she exercised two stock options: one for 8,406 shares at an exercise price of $35.8000 per share, expiring May 4, 2032, and another for 6,450 shares at $51.8100 per share, expiring May 4, 2033, receiving common stock.

What does the filing reveal about Diane Bonina’s Federal Signal (FSS) 401(k) holdings?
Units in the Issuer 401(k) plan were adjusted from 664.8677 to 665.1375, as of August 3, 2026. Footnote F3 states these units are convertible into Federal Signal common stock and the adjustment was based on a $129.12 issuer share price.

Were Diane Bonina’s Federal Signal (FSS) trades reported as made under a Rule 10b5-1 plan?
The document-level Rule 10b5-1 checkbox is not marked as affirming that trades were made under such a plan, and no footnote describes a 10b5-1 trading arrangement, so the report does not indicate plan-based trading for these transactions.
SEC Form 4
FORM 4UNITED 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*
Bonina Diane
(Last)(First)(Middle)
1333 BUTTERFIELD ROAD
SUITE 500
(Street)
DOWNERS GROVE ILLINOIS 60515
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
FEDERAL SIGNAL CORP /DE/ [ FSS ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
VP, Gen'l Counsel & Secretary
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/03/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/03/2026S4,408D$128.749515,689D
Common Stock08/04/2026M8,406A$35.824,095D
Common Stock08/04/2026S8,306D$130.4519(1)15,789D
Common Stock08/04/2026S100D$131.0515,689D
Common Stock08/04/2026M6,450A$51.8122,139D
Common Stock08/04/2026S6,350D$130.4118(2)15,789D
Common Stock08/04/2026S100D$131.0515,689D
Common Stock665.1375(3)Iheld 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right-to-buy)$35.808/04/2026M8,406 (4)05/04/2032Common Stock8,406$00D
Stock Option (right-to-buy)$51.8108/04/2026M6,450 (5)05/04/2033Common Stock6,450$00D
Explanation of Responses:
1. This transaction was executed in multiple trades at prices ranging from $130.00 to $130.80; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC, Federal Signal Corporation, or a security holder of Federal Signal Corporation.
2. This transaction was executed in multiple trades at prices ranging from $130.01 to $130.97; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC, Federal Signal Corporation, or a security holder of Federal Signal Corporation.
3. Units held in the Issuer 401(k) plan, which are convertible into Issuer common stock, were adjusted from 664.8677 to 665.1375 based on the Issuer price per share of $129.12 on 08/03/2026.
4. The option vested in three equal installments on May 4, 2023, 2024, and 2025.
5. The option vested in three equal installments on May 4, 2024, 2025, and 2026.
Remarks:
Diane I. Bonina08/05/2026
** Signature of Reporting PersonDate
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