Jon Costello (Ideas From HFI Research)
A subsidiary of HFI Research. Jon Costello is the author of all the reports.
- Top in Finance
- #405
- Paid leaderboard
- #188
- Subscribers
- 6.0K
- Paid subscribers
- 100+ paid
- Badge
- Bestseller 100
- Followers
- 34K
- Paid plan
- $100/mo
- Recommends
- 8
rounded by Substack
other newsletters
Growth history
Rank in Substack’s finance leaderboard: #405 today
Stats worth sharing
Tracked since Sep 10, 2026 — 1 daily snapshot so far. The card below is built from what we track and refreshes nightly. It is free for Jon Costello (Ideas From HFI Research) to post, embed or send to readers, as long as the watermark stays on it.
- Percentile
- Top 78%
- Best rank seen
- #405
of 525 ranked finance newsletters
on Sep 10, 2026
The card shows a growth line once there is a second day of snapshots to compare, or once this newsletter has three posts with reaction counts.
Recent posts
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Data: Substack public leaderboards and publication archives, refreshed nightly, plus public beehiiv sitemaps and recommendation pages, refreshed weekly. Source for this page: Jon Costello (Ideas From HFI Research). Subscriber counts are Substack’s own rounded public figures, so week-on-week changes move in steps. beehiiv audience sizes are self-reported by the publisher and are not verified. Last snapshot: Sep 10, 2026.