SEC Form 4 reporting owner

Calderaro Charles III

Calderaro Charles III has filed 5 Form 4 transactions reported between December 17, 2025 and February 27, 2026, as Chief Technical Officer of Avidity Biosciences, Inc..

Name as filed: Calderaro Charles III

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$269K

1 lines

Companies

with Form 4 filings

Latest transaction

Feb 27, 2026

transaction date

Roles and reported holdings

RNAAvidity Biosciences, Inc.
Dec 17, 2025 – Feb 27, 2026
Chief Technical Officer
Held directly49,797 sh as of Jan 7, 2026 · Form 4
24 months: $269K sold

Transaction history

All 5 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Feb 27, 2026	RNAChief Technical Officer	Disposition to issuerCode D · direct	80,000	—	—	0	Form 4
Feb 27, 2026	RNAChief Technical Officer	Disposition to issuerCode D · direct	98,547	—	—	0	Form 4
Jan 7, 2026	RNAChief Technical Officer	Open-market saleCode S · direct	3,727	$72.23	$269K@ $72.23	49,797	Form 4
Dec 17, 2025	RNAChief Technical Officer	Shares withheld for tax or exercise priceCode F · direct	9,726	$71.87	$699K@ $71.87	53,524	Form 4
Dec 17, 2025	RNAChief Technical Officer	Grant or awardCode A · direct	23,250	—	—	63,250	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.