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Equibles

GW&K Investment Management, LLC

Position in RARE — Ultragenyx Pharmaceutical Inc.

CIK 1082917 BOSTON, MA
Back to RARE Full portfolio

Position in RARE

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$49,456,532
+$15,613,358 QoQ
Shares Held
1,481,178
-8.3% QoQ
Ownership
1.50%
of shares outstanding
% of Portfolio
0.39%
of 13F equity value
Holder Rank
#16
of 311 holders
Holding Since
Mar 2023
14 quarters on record
Voting authority Sole 96% Shared 4% None 0%

Common Shares in RARE Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

GW&K Investment Management, LLC holds $876,997,841 across 27 Biotechnology names. RARE ranks #10 (5.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 HALO
Halozyme Therapeutics, Inc.
 1,353,883 $105,968,422
2 JAZZ
Jazz Pharmaceuticals plc
 350,667 $84,500,226
3 BBIO
BridgeBio Pharma, Inc.
 1,125,131 $83,799,756
4 CYTK
Cytokinetics Inc
 916,107 $78,043,155
5 LGND
Ligand Pharmaceuticals Inc
 246,883 $78,037,246
6 VCEL
Vericel Corp
 1,550,497 $68,981,610
7 INSM
INSMED Inc
 629,760 $67,145,010
8 CRNX
Crinetics Pharmaceuticals, Inc.
 1,731,140 $64,779,258

All Filings in RARE

Export CSV
14 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $49,456,532 1,481,178
2026-03-31 $33,843,174 1,615,426
2025-12-31 $31,634,361 1,375,407
2025-09-30 $34,597,082 1,150,169
2025-06-30 $17,499,631 481,288
2025-03-31 $18,185,060 502,211
2024-12-31 $21,436,558 509,545
2024-09-30 $25,917,907 466,569
2024-06-30 $16,707,930 406,519
2024-03-31 $14,164,672 303,377
2023-12-31 $14,706,036 307,529
2023-09-30 $11,084,119 310,915
2023-06-30 $13,214,907 286,471
2023-03-31 $2,538,891 63,314