Docket HopperPart I · Bills · 119th S. 4639
S. 4639 · 119th CongressTaxation

IRS Whistleblower Program Improvement Act has not moved since its introduction on May 21, 2026, with cosponsors from both parties

Sponsored by Grassley, Chuck R-IA · 3 cosponsors: 2 Democrats, 1 Republican
IntroducedMay 21, 2026
Reported—
Passed one chamber—
Passed both—
Law—
What it changes · CRS summary

CRS has not published a summary of this bill yet. Read the bill text.

Context
Committees
Senate Finance Committee
Policy area
Taxation: 20 of 6,214 bills became law, 113th–118th (0.3%)
Sponsor
19 of 426 bills enacted since 2013
Text versions
1: introduced in senate · 867 words
Latest action
May 21, 2026: Read twice and referred to the Committee on Finance.
Records
Congress.gov · Bill text
Exhibit 1Passage odds band at each stage, rated when the bill reached it [4]
Related bills · 3

Each bill appears once, under its strongest link. 3 in all.

Related, per CRS or House · 3

See these 26 bills on the network map →

Exhibit 2Articles naming the bill per day, last 90 days, US sources [3]