MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in RARE — Ultragenyx Pharmaceutical Inc.

CIK 912938 Boston, MA

Position in RARE

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

Position Value

$5,455,064

-$1,677,420 QoQ

Shares Held

260,385

-16.0% QoQ

Ownership

0.264%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2024

9 quarters on record

Voting authority Sole 98.64009063502121.ToString("F0")% Shared 1.3599093649787815.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. RARE ranks #19 (0.4% 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	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	$5,455,064	260,385	-16.0%	Shares	Defined	2026-05-14
2025-12-31	$7,132,484	310,108	-38.1%	Shares	Sole	2026-01-22
2025-09-30	$15,074,982	501,163	+3.0%	Shares	Sole	2025-10-29
2025-06-30	$17,693,939	486,632	-3.1%	Shares	Sole	2025-08-08
2025-03-31	$18,178,252	502,023	+0.3%	Shares	Sole	2025-05-02
2024-12-31	$21,065,164	500,717	-7.7%	Shares	Sole	2025-02-12
2024-09-30	$30,128,820	542,373	+46.5%	Shares	Sole	2024-11-12
2024-06-30	$15,217,151	370,247	+38.7%	Shares	Sole	2024-08-09
2024-03-31	$12,464,689	266,967	—	Shares	Sole	2024-05-14
No filing history on record for this holder in this stock.