As of the latest Form 4 filed Jun 29, 2026.
What Federal Signal Corporation insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 32 most recent filings for FSS.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-29 | 2026-06-26 | Vaillancourt Eric A. Director | AAward | +96.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-26 | Maue Richard A Director | AAward | +99.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | SHERMAN JENNIFER L President & CEO | FTax | −7.70K | $117.49 | $904K | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Hudson Ian A. S.V.P. & CFO | FTax | −1.66K | $117.49 | $195K | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | WEBER MARK SVP & COO | FTax | −2.28K | $117.49 | $268K | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-04 | Bonina Diane VP, Gen'l Counsel & Secretary | FTax | −962.00 | $117.49 | $113K | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-01 | SHERMAN JENNIFER L President & CEO | FTax | −29.7K | $121.61 | $3.61M | No | Form 4 ↗ |
| 2026-05-05 | 2026-05-01 | SHERMAN JENNIFER L, President & CEO | MExercise | +59.2K | $12.66 | $750K | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Workman John L Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Vaillancourt Eric A. Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Patel Shashank Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Maue Richard A Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Lowe Eugene Joseph III Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | Helmkamp Katrina L Director | AAward | +1.28K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-21 | REICHELDERFER BRENDA Director | AAward | +1.67K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-30 | 2026-03-27 | Vaillancourt Eric A. Director | AAward | +42.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-30 | 2026-03-27 | Maue Richard A Director | AAward | +43.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-10 | 2026-03-10 | Maue Richard A Director | PPurchase | +2.00K | $110.77 | $222K | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-27 | SHERMAN JENNIFER L President & CEO | AAward | +11.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-27 | Bonina Diane VP, Gen'l Counsel & Secretary | AAward | +1.40K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-27 | Hudson Ian A. S.V.P. & CFO | AAward | +2.42K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-27 | WEBER MARK SVP & COO | AAward | +2.58K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-27 | Boeschen Felix VP Strategy/Investor Relations | AAward | +590.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | SHERMAN JENNIFER L President & CEO | FTax | −29.5K | $117.63 | $3.46M | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | SHERMAN JENNIFER L, President & CEO | AAward | +66.5K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | Bonina Diane VP, Gen'l Counsel & Secretary | FTax | −3.72K | $117.63 | $437K | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | Bonina Diane, VP, Gen'l Counsel & Secretary | AAward | +8.32K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | Hudson Ian A. S.V.P. & CFO | FTax | −6.38K | $117.63 | $750K | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | Hudson Ian A., S.V.P. & CFO | AAward | +14.3K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | WEBER MARK SVP & COO | FTax | −9.84K | $117.63 | $1.16M | No | Form 4 ↗ |
| 2026-03-02 | 2026-02-26 | WEBER MARK, SVP & COO | AAward | +22.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2025-12-19 | 2025-12-18 | SHERMAN JENNIFER L President & CEO | GGift | −1.80K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also FSS’s full analysis or the market-wide insider trading feed. The tabs above jump to FSS’s other SEC data.
Source: SEC Form 4 filings for FSS, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.