Which super PACs did Ben Horowitz fund in 2024?

Blackpac ($2.5M), DSCC ($28K), NRCC ($19K), NRSC ($14K), DCCC ($14K).

Which candidates did Ben Horowitz's money end up backing or attacking in 2024?

for Kamala Harris (President, about $1.3M, lost); for Elissa Slotkin (Michigan Senate, about $168K, won); for Sherrod Brown (Ohio Senate, about $160K, lost). Amounts are the donor's share of each group's spending.

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Donor

Ben Horowitz

Individual

Co-Founder, Andreessen Horowitz · Nevada

9 reported gifts; 7 recipient groups listed, as reported to the FEC by the groups that received them.

Backed losers

Ben Horowitz gave $2.6M to super PACs and other outside groups in the 2024 federal elections, and 100% of it helped Democrats (FEC filings with varying coverage dates; the most common larger-campaign cutoff is Dec 31, 2024). Among dollars with a matched election-stage result, 12% were on the winning side ($235K won, $1.7M lost). $90K had no matched result and is excluded.

Gave to outside spenders

$2.6M

100% of it helped Democrats

Winning share of scored dollars

12%

$1.9M scored (74% of gifts)

Spent on the losing side

$1.7M

Not allocated or result unknown

$672K

$581K not allocated to tracked outside spending; $90K has no matched result. Neither is cash on hand.

Where the checks went

A person writing checks from their own fortune. Each gift is split the way the group that received it split its spending between winners and losers, so a $10M check to a group that spent 80% on losers counts as $8M on the losing side.

✓ Backed the winner or attacked the loser ✗ Backed the loser or attacked the winner Result not matched

Group	Gave	Won / lost
Blackpac $512K not allocated to tracked outside spending	$2.5M	$228K / $1.7M
DSCC $23K not allocated to tracked outside spending	$28K	$3K / $2K
NRCC $15K not allocated to tracked outside spending	$19K	$1K / $3K
NRSC $13K not allocated to tracked outside spending	$14K	$5 / $960
DCCC $11K not allocated to tracked outside spending	$14K	$2K / $1K
Chc Bold PAC $4K not allocated to tracked outside spending	$5K	$999 / $201
Equality PAC $3K not allocated to tracked outside spending	$5K	$866 / $506

The trail

What the money bought

The candidates Ben Horowitz's money was spent for or against, pro-rated by Ben Horowitz's share of each group's funding.

Candidate	Race	Spending	Their share	Paid off?
Kamala Harris	President	Supporting	$1.3M	✗ No
Elissa Slotkin	Michigan Senate	Supporting	$168K	✓ Yes
Sherrod Brown	Ohio Senate	Supporting	$160K	✗ No
Robert P. Casey Jr.	Pennsylvania Senate	Supporting	$156K	✗ No
Joseph Biden	President	Supporting	$89K	Unknown
Angela Alsobrooks	Maryland Senate	Supporting	$60K	✓ Yes
Donald Trump	President	Attacking	$46K	✗ No
Donald Trump	President (primary)	Attacking	$1K	✗ No
Mike Rogers	Michigan Senate	Attacking	$1K	✓ Yes
Dave McCormick	Pennsylvania Senate	Attacking	$1K	✗ No
Eric Hovde	Wisconsin Senate	Attacking	$906	✓ Yes
Joseph Biden	President (primary)	Supporting	$815	Unknown

Individual as classified from the FEC entity type and public reporting.

Questions people ask

How much did Ben Horowitz spend on the 2024 elections, and did it win?: Ben Horowitz gave $2.6M to super PACs and other outside groups in the 2024 federal elections, and 100% of it helped Democrats (FEC filings with varying coverage dates; the most common larger-campaign cutoff is Dec 31, 2024). Among dollars with a matched election-stage result, 12% were on the winning side ($235K won, $1.7M lost). $90K had no matched result and is excluded.
Which super PACs did Ben Horowitz fund in 2024?: Blackpac ($2.5M), DSCC ($28K), NRCC ($19K), NRSC ($14K), DCCC ($14K).
Which candidates did Ben Horowitz's money end up backing or attacking in 2024?: for Kamala Harris (President, about $1.3M, lost); for Elissa Slotkin (Michigan Senate, about $168K, won); for Sherrod Brown (Ohio Senate, about $160K, lost). Amounts are the donor's share of each group's spending.