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Richard Bartram

CIK 1723729 · Chief Financial Officer · last filed 2026-02-03

Richard Bartram is a Chief Financial Officer who has filed 21 SEC Form 4 insider transactions across 2 companies since 2018. The most recent filing, for MBX, was dated Jun 10, 2026. Across all open-market trades the lifetime net is +$343.0K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.3M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$1.28M

Companies

2

Total Filings

21

Lifetime Open-Market Net

$343.0K

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MBX Chief Financial Officer 15,000 $67.82 $1.02M $0 3 2026-02-03
ESPR Chief Financial Officer 82,751 $3.18 $263.1K $343.0K 8 2022-03-16

Recent Filings

21 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-10 MBX Notice (144) −9,167 -$280.0K EDGAR
2026-06-09 MBX Notice (144) −10,833 -$321.3K EDGAR
2026-05-13 MBX Notice (144) −15,000 -$554.3K EDGAR
2026-05-11 MBX Notice (144) −22,500 -$991.9K EDGAR
2026-05-08 MBX Notice (144) −10,000 -$379.6K EDGAR
2026-05-07 MBX Notice (144) −10,000 -$322.1K EDGAR
2026-05-01 MBX Notice (144) −5,000 -$159.0K EDGAR
2026-04-22 MBX Notice (144) −10,423 -$341.4K EDGAR
2026-03-25 MBX Notice (144) −1,061 -$30.2K EDGAR
2026-03-16 MBX Notice (144) −10,000 -$300.5K EDGAR
Showing 1–10 of 21
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.