Who funds South Dakota Conservative PAC?

Its biggest reported donors in the 2026 cycle were Denny Sanford ($200K), William Duhamel ($150K), Condorcet ($100K), Katharine Duhamel ($50K), Custom Management Services ($50K), out of $575K received from donors tracked here.

Which candidates did South Dakota Conservative PAC spend the most on in 2026?

against Brian Bengs (South Dakota Senate, $985K, won); for Mike Rounds (South Dakota Senate, $154K, won).

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Outside spender

South Dakota Conservative PAC

FEC committee C00904797

Backed winners

South Dakota Conservative PAC spent $1.1M on independent expenditures in the 2026 federal elections, and 100% of it helped Republicans (FEC filings with varying coverage dates; the most common larger-campaign cutoff is Oct 14, 2026). Among dollars with a matched election-stage result, 100% were on the winning side ($1.1M won, $0 lost). $0 had no matched result and is excluded.

Outside spending

$1.1M

Winning share of scored dollars

100%

$1.1M scored (100% of spending); $0 unknown

On the losing side

Supporting vs attacking

14% / 86%

$154K for, $985K against

Google says South Dakota Conservative PAC also spent $104K on Google and YouTube ads this cycle (9% of its FEC-reported outside spending). All ad buyers →

Follow the money

Who filled the envelope

The donor records in this snapshot trace $575K to South Dakota Conservative PAC. This is incomplete funding coverage; percentages below refer only to these traced gifts. The allocation denominator is $1.1M.

All big donors →

Denny SanfordIndividual$200K (35%)
William DuhamelIndividual$150K (26%)
CondorcetCompany / nonprofit$100K (17%)
Katharine DuhamelIndividual$50K (9%)
Custom Management ServicesCompany / nonprofit$50K (9%)
Mark RowanIndividual$25K (4%)

The people behind it

The people giving to South Dakota Conservative PAC

4 named people gave $425K in itemized gifts this cycle. These are the biggest. Committees must name anyone who gives more than $200 in a year; smaller gifts are reported only as a lump sum, and money from companies, unions and other groups is not in this list.

Denny SanfordChairman · United National Corporation · SD$200K2 gifts
William DuhamelFounding Principal · Route One Investment Company · CA$150K2 gifts
Katharine DuhamelDirector · Candybomber · CA$50K
Mark RowanCEO · Apollo Global Management · NY$25K

Names, employers and occupations are as the committee reported them to the FEC. People with the same name in the same state are counted as one person. Federal law bars using these names to ask for money or for any commercial purpose.

Where the money went

Biggest targets, with whether each one won.

✓ Backed the winner or attacked the loser ✗ Backed the loser or attacked the winner Race not called yet Result not matched

Candidate	Race	Spending	Amount	Won?
Brian Bengs	South Dakota Senate	Attacking	$985K	✓ Yes
Mike Rounds	South Dakota Senate (primary)	Supporting	$154K	✓ Yes

Questions people ask

How much did South Dakota Conservative PAC spend in 2026, and did it win?: South Dakota Conservative PAC spent $1.1M on independent expenditures in the 2026 federal elections, and 100% of it helped Republicans (FEC filings with varying coverage dates; the most common larger-campaign cutoff is Oct 14, 2026). Among dollars with a matched election-stage result, 100% were on the winning side ($1.1M won, $0 lost). $0 had no matched result and is excluded.
Who funds South Dakota Conservative PAC?: Its biggest reported donors in the 2026 cycle were Denny Sanford ($200K), William Duhamel ($150K), Condorcet ($100K), Katharine Duhamel ($50K), Custom Management Services ($50K), out of $575K received from donors tracked here.
Which candidates did South Dakota Conservative PAC spend the most on in 2026?: against Brian Bengs (South Dakota Senate, $985K, won); for Mike Rounds (South Dakota Senate, $154K, won).