VIKING GLOBAL INVESTORS LP

Holdings History for Sionna Therapeutics, Inc. - Common Stock, $0.001 par value per share (SION)

Symbol: SION on Nasdaq
Investment type: Equity / Common Stock, $0.001 par value per share
Latest Disclosed Shares Owned: 2,952,754 shares
Security Ownership %: 6.7%

Shares, Excluding Options vs Price

Value, Excluding Options

VIKING GLOBAL INVESTORS LP ownership in Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION)

14 Feb 2025 - VIKING GLOBAL INVESTORS LP has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,952,754 shares of Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION). This represents 6.7% ownership of the company. This is the first filing by VIKING GLOBAL INVESTORS LP disclosing ownership of Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION).

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
VIKING GLOBAL INVESTORS LP	6.7%		$35,551,158	2,952,754			$12.04	13G	10 Feb 2025	14 Feb 2025, 16:58

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	0.35%	0%	$131,449,746	3,195,181	0		$41.14	Q4 2025
30 Sep 2025	0.24%	0%	$93,970,273	3,195,181	0		$29.41	Q3 2025
30 Jun 2025	0.16%	+0.01%	$55,436,390	3,195,181	+242,427	+8.2%	$17.35	Q2 2025
31 Mar 2025	0.1%	+0.1%	$30,885,807	2,952,754	+2,952,754	NEW	$10.46	Q1 2025

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.