S 4639 — A bill to provide additional support to whistleblowers who report information about noncompliance with Federal tax laws.
Congress 119 · introduced 2026-05-21
Latest action: — Read twice and referred to the Committee on Finance.
Sponsors (2)
- Grassley, Chuck (R, IA-S) — sponsor · 2026-05-21
- Wyden, Ron (D, OR-S) — cosponsor · 2026-05-21
Action timeline (2)
- — Read twice and referred to the Committee on Finance.
- · 10000 — Introduced in Senate
Text versions (0)
No text versions on file yet — same ingest as the action timeline populates these. Each version has direct links to the XML / HTML / PDF at govinfo.gov.
Bill text (extracted)
Amendments
Congressional Research Service briefs (0)
CRS reports that cite this bill in their relatedMaterials — what Congress was reading on the topic. Click any report for its summary, formats, and bill-citation walk.
No CRS reports cite this bill yet.
Who matters on this bill
Who matters
Members ranked by combined influence on this bill: role (sponsor 5 / cosponsor 1), capped speech count from the Congressional Record, and recorded-vote engagement.
| # | Member | Role | Speeches | Voted | Score |
|---|---|---|---|---|---|
| 1 | Grassley, Chuck (R, senate IA) | sponsor | 21 | — | 10 |
| 2 | Wyden, Ron (D, senate OR) | cosponsor | 5 | — | 6 |
Who's influencing them
Orgs ranked by combined money flow on this bill: LDA filings citing the bill + individual contributions in cycle 2026from donors whose employer matches the org name (Schedule A) to any principal committee in the "who matters" list above.
| # | Org | LDA filings | LDA spend | Donor employees | Employee donations | Total |
|---|---|---|---|---|---|---|
| 1 | not employed | 0 | $0 | 603 | $210,375 | $210,375 |
| 2 | retired | 0 | $0 | 178 | $47,927 | $47,927 |
| 3 | self employed | 0 | $0 | 47 | $20,362 | $20,362 |
| 4 | none | 0 | $0 | 4 | $14,072 | $14,072 |
| 5 | winkler development corporation | 0 | $0 | 2 | $14,000 | $14,000 |
| 6 | dci group | 0 | $0 | 1 | $10,500 | $10,500 |
| 7 | spacex | 0 | $0 | 1 | $9,700 | $9,700 |
| 8 | solana labs inc. | 0 | $0 | 1 | $7,000 | $7,000 |
| 9 | kleiner perkins | 0 | $0 | 1 | $7,000 | $7,000 |
| 10 | united fund advisors | 0 | $0 | 1 | $7,000 | $7,000 |
| 11 | hawthorn retirement group llc | 0 | $0 | 1 | $6,600 | $6,600 |
| 12 | hawthorn retirement | 0 | $0 | 1 | $6,600 | $6,600 |
| 13 | premier jets | 0 | $0 | 2 | $5,000 | $5,000 |
| 14 | mccullough research | 0 | $0 | 1 | $5,000 | $5,000 |
| 15 | grail, llc | 0 | $0 | 1 | $5,000 | $5,000 |
| 16 | echo health ventures | 0 | $0 | 1 | $5,000 | $5,000 |
| 17 | gowest credit union association | 0 | $0 | 2 | $3,500 | $3,500 |
| 18 | incite.org | 0 | $0 | 1 | $3,500 | $3,500 |
| 19 | manzanita capital | 0 | $0 | 1 | $3,300 | $3,300 |
| 20 | paulson coletti | 0 | $0 | 1 | $3,300 | $3,300 |
| 21 | advance local | 0 | $0 | 1 | $3,300 | $3,300 |
| 22 | pisces inc | 0 | $0 | 1 | $3,300 | $3,300 |
| 23 | csi | 0 | $0 | 1 | $3,000 | $3,000 |
| 24 | bill naito co. | 0 | $0 | 1 | $2,850 | $2,850 |
| 25 | holland partner group | 0 | $0 | 1 | $2,500 | $2,500 |
Stance (positions taken)
Predicted vote
Aggregated from: actual roll-call votes (when present) → sponsor → cosponsor → party median (predicts YES when ≥25% of the caucus sponsored/cosponsored). Each row labels its confidence tier so you can see why a position was predicted.
2 predicted yes (0%) · 3 predicted no (1%) · 538 unknown (99%)
By party: · R: 1 yes / 0 no / 276 unknown · D: 1 yes / 0 no / 262 unknown · I: 0 yes / 3 no
2 high-confidence positions (voted + sponsor + cosponsor)
- Grassley, Chuck (R · senate · IA) · sponsor
- Wyden, Ron (D · senate · OR) · cosponsor