William O'Callaghan

Individual

Also gave $11K to joint fundraising committees. That isn't in the totals here, because those committees pass the money on to others.

Grouped by the exact name reported to the FEC, which has no ID for individual donors. Other people with this name may be included.

Total Contributed

$26K

Contributions

Recipients

Active Period

1999–2026

Donor Profile

Party Lean

D $25KR $1K

Top States

AZ$10K

DC$8K

FL$6K

PA$2K

GA$938

Giving Trend

↓ 96%

2025–2026 vs 2023–2024

Employer

INVESTMENT BANKER

Summary

O'CALLAGHAN, WILLIAM is an individual political donor based in WI. They have contributed $26K across 39 contributions to 13 recipients. Their average contribution is $677.256. Top recipients include CONOR FOR AZ, HILLARY CLINTON FOR PRESIDENT, BILL NELSON FOR US SENATE. Their political giving spans from the 2000 to the 2026 election cycle, with peak giving of $13K in 2024.

Giving Pattern by Cycle

Contribution amounts per election cycle, colored by recipient party

All Recipients

Committees and candidates receiving contributions, all cycles

#	Name	Party	State	Total	Contributions
1	CONOR FOR AZ	Democratic	AZ	$6,600	1
2	HILLARY CLINTON FOR PRESIDENT	Democratic	DC	$4,600	2
3	BILL NELSON FOR US SENATE	Democratic	FL	$4,000	4
4	YASSAMIN ANSARI FOR CONGRESS	Democratic	AZ	$3,300	1
5	FRIENDS OF JAN SCHNEIDER	Democratic	FL	$2,000	1
6	DNC SERVICES CORP / DEMOCRATIC NATIONAL COMMITTEE	Democratic	DC	$1,525	4
7	HARRIS FOR PRESIDENT	Democratic	PA	$1,500	2
8	TEAM HERSCHEL, INC	Republican	GA	$938	17
9	HARRIS VICTORY FUND	—	DC	$600	2
10	DSCC	Democratic	DC	$500	1
11	TAMMY BALDWIN FOR SENATE	Democratic	WI	$500	1
12	DCCC	Democratic	DC	$250	1
13	REPUBLICAN NATIONAL COMMITTEE	Republican	DC	$100	2

Source: FEC bulk data

William O'Callaghan — Individual Donor Profile | Poliscope