Tony Arnerich

Managing Partner at3x5 PartnersPortland, Oregon

Tony Arnerich was a managing partner at 3x5 Partners. He joined American Century Investments in September 2023 to lead its private investment capabilities.

What Tony can write

Writes checks ofNot reported
Comes in atSeedMostly follows a lead
Pitch pageSubmit on their siteThe firm asks founders to apply here.

Career

  1. 3x5 Partners · managing partner
    Now
  2. American Century Investments
    2023-null

Focus

private marketshealth careclimate

Also at 3x5 Partners

Partners like Tony

At firms with a similar stage, sector and check size.

Alert me when 3x5 Partners is active

One email when Tony's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

Send Mode VC your deck

Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.

Send your deck

Questions

Who is Tony Arnerich?

Tony Arnerich was a managing partner at 3x5 Partners. He joined American Century Investments in September 2023 to lead its private investment capabilities.

How much does Tony Arnerich invest?

3x5 Partners has not reported a check size. It invests at seed.

How do I pitch Tony Arnerich?

A warm intro from a founder 3x5 Partners backed works best.

What did Tony Arnerich do before 3x5 Partners?

American Century Investments.

Last updated 2026-10-15. Is this you? Ask for a correction.