Position in IONS
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$58,521,315
-$3,711,990 QoQ
Shares Held
779,349
-0.9% QoQ
Ownership
0.472%
of shares outstanding
% of Portfolio
0.53%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2024
6 quarters on record
Voting authority
Sole 94.26893471345956.ToString("F0")%
Shared 5.700270353846608.ToString("F0")%
None 0.03079493269382523.ToString("F0")%
Common Shares in IONS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026GW&K Investment Management, LLC holds $699,704,251 across 25 Biotechnology names. IONS ranks #6 (8.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | INSM |
INSMED Inc
|
623,048 | $101,880,808 | |
| 2 | HALO |
Halozyme Therapeutics, Inc.
|
1,393,875 | $90,086,140 | |
| 3 | BBIO |
BridgeBio Pharma, Inc.
|
962,643 | $71,485,868 | |
| 4 | JAZZ |
Jazz Pharmaceuticals plc
|
371,098 | $70,156,076 | |
| 5 | CRNX |
Crinetics Pharmaceuticals, Inc.
|
1,618,686 | $58,790,674 | |
| 6 | IONS |
Ionis Pharmaceuticals Inc
This page
|
779,349 | $58,521,315 | |
| 7 | VCEL |
Vericel Corp
|
1,616,855 | $52,014,225 | |
| 8 | AGIO |
Agios Pharmaceuticals, Inc.
|
1,214,901 | $41,100,100 |
All Filings in IONS
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $58,521,315 | 779,349 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $62,233,305 | 786,668 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $17,271,337 | 264,007 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $17,733,273 | 448,830 | Shares | Sole | 2025-08-11 | |
| 2025-03-31 | $5,500,262 | 182,309 | Shares | Sole | 2025-05-05 | |
| 2024-12-31 | $6,545,211 | 187,220 | Shares | Sole | 2025-02-05 | |
| No filing history on record for this holder in this stock. | ||||||