Charles Calderaro III

CIK: 0002049888

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (20.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (40.0%)

Compensation grants

Other (G, F, J, C, D, …)2 (40.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

RNAM

Avidity Biosciences, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (5 total)

RNAM
Avidity Biosciences, Inc.
Feb 27, 2026
Disposition(D)
Direct
98.5K shares-
RNA
Avidity Biosciences, Inc.
Jan 7, 2026
Sale(S)
Direct
3.7K shares at avg. $72.23$269K
RNA
Avidity Biosciences, Inc.
Dec 17, 2025
Award(A)
Direct
23.3K shares-
RNA
Avidity Biosciences, Inc.
Dec 17, 2025
Tax Payment(F)
Direct
9.7K shares at avg. $71.87$699K
RNA
Avidity Biosciences, Inc.
Jan 6, 2025
Award(A)
Direct
40K shares-

		Type	Shares	Price		Ownership
Feb 27, 2026	RNAM Avidity Biosciences, Inc.	Disposition(D)	98,547	-	$0	Direct
Jan 7, 2026	RNA Avidity Biosciences, Inc.	Sale(S)	3,727	$72.23	$269,201	Direct
Dec 17, 2025	RNA Avidity Biosciences, Inc.	Award(A)	23,250	-	-	Direct
Dec 17, 2025	RNA Avidity Biosciences, Inc.	Tax Payment(F)	9,726	$71.87	$699,008	Direct
Jan 6, 2025	RNA Avidity Biosciences, Inc.	Award(A)	40,000	-	$0	Direct

1-5 of 5 transactions

About Calderaro Charles III

Calderaro Charles III (SEC CIK 0002049888) files insider reports with the SEC as Chief Technical Officer of Avidity Biosciences, Inc. (RNAM).

Signal8 holds 5 ownership filings by Calderaro Charles III (1 Form 3, 4 Form 4), filed between Jan 8, 2025 and Feb 27, 2026. Those filings report 5 transactions, from Jan 6, 2025 to Feb 27, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Calderaro Charles III's filings is in SAN DIEGO, CA.

Recent filings by Calderaro Charles III

Feb 27, 2026: Disposition to issuer transaction of RNAM shares (Form 4, code D).
Jan 7, 2026: Open-market sale of RNA shares (Form 4, code S).
Dec 17, 2025: Grant or award of RNA shares (Form 4, code A).
Dec 17, 2025: Tax withholding of RNA shares (Form 4, code F).
Jan 6, 2025: Grant or award of RNA shares (Form 4, code A).

Other insiders filing for Avidity Biosciences, Inc. (RNAM)

McCarthy Teresa, Chief Human Resources Officer
Thompson Tamar, Director
MacLean Michael F, Chief Financial Officer
Skerjanec Simona, Director
Hughes Steven George, Chief Medical Officer
Boyce Sarah, President and CEO

How to read Form 4 transaction codes