CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Position in ATYR — aTYR PHARMA INC
CIK 884546
SAN FRANCISCO, CA
Position in ATYR
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$164,374
-$9,269 QoQ
Shares Held
210,737
-5.0% QoQ
Ownership
0.215%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2021
18 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ATYR Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $7,346,663,053 across 299 Biotechnology names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
2,041,282 | $1,013,966,007 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
846,306 | $527,705,642 | |
| 3 | RVMD |
Revolution Medicines, Inc.
|
1,917,025 | $359,020,441 | |
| 4 | MRNA |
Moderna, Inc.
|
4,838,884 | $338,867,045 | |
| 5 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
755,377 | $227,391,137 | |
| 6 | INCY |
Incyte Corp
|
1,692,439 | $191,854,884 | |
| 7 | RPRX |
Royalty Pharma plc
|
3,083,528 | $172,893,414 | |
| 8 | CYTK |
Cytokinetics Inc
|
1,565,781 | $133,388,883 |
All Filings in ATYR
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $164,374 | 210,737 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $173,643 | 221,767 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $188,212 | 261,043 | Shares | Sole | 2025-11-10 | |
| 2025-06-30 | $1,310,853 | 258,551 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $120,531 | 39,911 | Shares | Sole | 2025-09-15 | |
| 2024-12-31 | $143,674 | 39,689 | Shares | Sole | 2025-02-06 | |
| 2024-09-30 | $46,972 | 26,689 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $41,634 | 26,689 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $52,043 | 26,689 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $37,631 | 26,689 | Shares | Sole | 2024-02-06 | |
| 2023-09-30 | $42,168 | 26,689 | Shares | Sole | 2023-11-08 | |
| 2023-06-30 | $57,648 | 26,689 | Shares | Sole | 2023-08-10 | |
| 2023-03-31 | $56,046 | 26,689 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $21,900 | 10,000 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $30,000 | 10,000 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $28,300 | 10,000 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $53,500 | 10,000 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $74,700 | 10,000 | Shares | Sole | 2022-02-11 | |
| No filing history on record for this holder in this stock. | ||||||