What are Notable X followers?

Notable Followers surfaces when notable investors and operators are engaging with a company's team on X, giving you an early signal of investor interest.

Console

Search/List grid

A dedicated Notable Followers column shows up directly in the grid. Hovering over an entry reveals follower and firm details:

Traction filter (company search)

Filter companies by specific investors, and by when they started following:

Company page

A Notable Followers table is available on the Traction tab of any company page, showing the full list of notable followers for that company:

Requesting new investors to track

Don't see an investor you care about in the Notable Followers filter? You can request that Harmonic start tracking them directly in-product, right from the filter:

Use cases

Deal sourcing — spot early investor interest in a company before a round is publicly announce
Portfolio monitoring — track which investors are engaging with your portfolio companies' teams
Competitive intelligence — see which investors are circling companies in a space you're watching

API

Overview

Notable Followers data is available via notable_followers, a purpose-built field available on both the company and person objects, with identical structure.

Purpose-built field

Each entry includes the follower, the firm they belong to, and who they followed:

"notable_followers": [
    {
        "follower_urn": "urn:harmonic:person:154392254",
        "follower_name": "Jason Calacanis",
        "firm_urn": "urn:harmonic:investor:240050",
        "firm_name": "LAUNCH",
        "followed_urn": "urn:harmonic:person:6356",
        "followed_name": "Karim Atiyeh",
        "follow_observed_at": "2026-07-14T06:04:28Z"
    },
    {
        "follower_urn": "urn:harmonic:person:172052109",
        "follower_name": "Jordan Segall",
        "firm_urn": "urn:harmonic:investor:168753",
        "firm_name": "Redpoint",
        "followed_urn": "urn:harmonic:person:6356",
        "followed_name": "Karim Atiyeh",
        "follow_observed_at": "2026-07-11T06:04:11Z"
    }
]

A companion field, num_notable_followers, gives a simple count without needing to iterate the array.

Highlights

This same underlying data also powers the highlight tooltip you see in console, surfaced in the highlights array under two categories:

"highlights": [
    {
        "category": "New Notable Followers",
        "date_added": null,
        "text": "@karimatiyeh (Karim Atiyeh) newly followed by LAUNCH (Jason Calacanis), Redpoint (Jordan Segall)",
        "company_urn": null
    },
    {
        "category": "Notable Followers",
        "date_added": null,
        "text": "@karimatiyeh (Karim Atiyeh) followed by Benchmark (Chetan Puttagunta, Eric Vishria), Redpoint (Jacob Effron, Jordan Segall), BoxGroup (Greg R., Nimi Katragadda), +29 investors at 24 other firms",
        "company_urn": null
    }
]

Additional API documentation, bulk data support, and Scout support for Notable Followers are still in progress and will be added here once available.