Marc Harrison
Marc Harrison, Chair, TowerBrook Healthcare Institute | Senior Advisor, TowerBrook | Strategic Advisor, General Catalyst | Founding CEO, HATCo | Former CEO, Intermountain Healthcare | Physician Executive at General Catalyst, posted 4 times in the last 90 days, mostly personal highlights. That is about 0.3 posts a week; the most recent went up on Sep 22, 2026. Most of those were text-only posts (75%), with images at 25%. Everything in that window was an original post, no reshares. Against the Imagine AI research baseline of 20,000+ LinkedIn posts, Marc Harrison's typical post lands in the top 10% of the baseline and top quarter in Venture Capital. General Catalyst has 50 other people in the benchmark, including Andrew Arruda, Maryam Mujica and Chris Bischoff.
What format they post
Also posting at General Catalyst
- Andrew ArrudaRefactoring healthcare @Flexpa, Democratizing law @ROSSIntel, Frontier investing @ManiacVC. Co-author of “AI in Application” in 2018.43 posts
- Maryam MujicaPresident, General Catalyst Institute13 posts
- Chris BischoffCOO, GC Capital and Managing Director, General Catalyst11 posts
- Quentin Clark
Post counts are the public LinkedIn posts Imagine AI collects for this person, taken over the 90 days to Sep 22, 2026; reshares are left out of the post count and the format mix. Follower counts come from the last profile check. The band compares a typical post, the geometric mean of reactions on posts that have had two weeks to settle, with the Imagine AI research baseline of 20,000+ posts from B2B startups. How the benchmark is built.
How to move up
- At Marc Harrison's typical post, 2 more original posts a week, every week, would move Marc Harrison from #359 to about #72.
- Posting every week at today's cadence alone would put Marc Harrison at about #194.
