MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in IONS — Ionis Pharmaceuticals Inc

CIK 912938 Boston, MA

Position in IONS

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$50,018,650

-$14,277,765 QoQ

Shares Held

666,116

-18.0% QoQ

Ownership

0.403%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2023

9 quarters on record

Voting authority Sole 99.39755237826444.ToString("F0")% Shared 0.6024476217355536.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $1,374,765,738 across 53 Biotechnology names. IONS ranks #7 (3.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ASND	Ascendis Pharma A/S	1,860,669	$425,590,816
2	TECH	BIO-TECHNE Corp	3,733,248	$195,099,537
3	ALNY	Alnylam Pharmaceuticals, Inc.	496,004	$164,112,841
4	VRTX	Vertex Pharmaceuticals Inc / Ma	327,498	$146,240,953
5	LGND	Ligand Pharmaceuticals Inc	411,543	$82,164,559
6	BNTX	BioNTech SE	670,514	$59,595,283
7	IONS	Ionis Pharmaceuticals Inc This page	666,116	$50,018,650
8	INCY	Incyte Corp	410,729	$38,657,809

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$50,018,650	666,116	-18.0%	Shares	Defined	2026-05-14
2025-12-31	$64,296,415	812,747	-5.8%	Shares	Sole	2026-01-22
2025-09-30	$56,430,833	862,593	+66.1%	Shares	Sole	2025-10-29
2025-06-30	$20,512,959	519,184	+9204.4%	Shares	Sole	2025-08-08
2024-03-31	$241,893	5,580	-0.2%	Shares	Sole	2024-05-14
2023-12-31	$282,899	5,592	-3.1%	Shares	Sole	2024-02-08
2023-09-30	$261,681	5,769	-78.3%	Shares	Sole	2023-11-08
2023-06-30	$1,088,484	26,529	-2.3%	Shares	Sole	2023-08-09
2023-03-31	$970,448	27,153	—	Shares	Sole	2023-05-10
No filing history on record for this holder in this stock.