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 $1.6M, lost); for Elissa Slotkin (Michigan Senate, about $212K, won); for Sherrod Brown (Ohio Senate, about $201K, 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 gifts to 7 groups, as reported to the FEC by the groups that received them.

Loser

Ben Horowitz gave $2.6M to super PACs and other outside groups in the 2024 federal elections, and 99% of it helped Democrats (FEC filings through Dec 31, 2024). Counting dollars, not candidates, and only races already called, 13% ended up on the winning side ($310K won, $2.1M lost).

Gave to outside spenders

$2.6M

99% of it helped Democrats

Ended up on the winning side

13%

$310K of the dollars in races already called

Spent on the losing side

$2.1M

Not spent yet

$147K

Sitting with groups that have not spent

Where the cheques went

A person writing cheques 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 cheque 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	$2.5M	$287K / $2.1M
DSCC $16K not spent yet	$28K	$7K / $4K
NRCC	$19K	$5K / $13K
NRSC $11K not spent yet	$14K	$15 / $3K
DCCC $4K not spent yet	$14K	$5K / $4K
Chc Bold PAC	$5K	$4K / $706
Equality PAC $1K not spent yet	$5K	$2K / $1K

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	$1.6M	✗ No
Elissa Slotkin	Michigan Senate	Supporting	$212K	✓ Yes
Sherrod Brown	Ohio Senate	Supporting	$201K	✗ No
Robert P. Casey Jr.	Pennsylvania Senate	Supporting	$196K	✗ No
Joseph Biden	President	Supporting	$113K	Unknown
Angela Alsobrooks	Maryland Senate	Supporting	$75K	✓ Yes
Donald Trump	President	Attacking	$60K	✗ No
Mike Rogers	Michigan Senate	Attacking	$3K	✓ Yes
Dave McCormick	Pennsylvania Senate	Attacking	$3K	✗ No
Eric Hovde	Wisconsin Senate	Attacking	$3K	✓ Yes
Marie Gluesenkamp Perez	Washington 3rd District	Attacking	$2K	✗ No
Elissa Slotkin	Michigan Senate	Attacking	$1K	✗ No

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 99% of it helped Democrats (FEC filings through Dec 31, 2024). Counting dollars, not candidates, and only races already called, 13% ended up on the winning side ($310K won, $2.1M lost).
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 $1.6M, lost); for Elissa Slotkin (Michigan Senate, about $212K, won); for Sherrod Brown (Ohio Senate, about $201K, lost). Amounts are the donor's share of each group's spending.