That partner had privileged access to that confidential information and as such wasn’t an unrelated 3rd party. Where the ‘theft’ line of reasoning is an issue

That partner had privileged access to that confidential information and as such wasn’t an unrelated 3rd party. Where the ‘theft’ line of reasoning is an issue for unrelated 3rd parties is hacking: https://www.justice.gov/usao-edny/pr/former-hedge-fund-manager-sentenced-60-months-imprisonment-and-ordered-pay-144-million https://www.justice.gov/usao-edny/pr/former-hedge-fund-manag...