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
#19
of 109 holders
Holding Since
Dec 2021
18 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in ATYR Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026CHARLES SCHWAB INVESTMENT MANAGEMENT INC holds $6,184,692,793 across 287 Biotechnology names. ATYR ranks #253 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
1,920,871 | $857,745,736 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
804,508 | $621,595,061 | |
| 3 | MRNA |
Moderna, Inc.
|
4,734,356 | $240,505,284 | |
| 4 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
673,356 | $222,793,299 | |
| 5 | INSM |
INSMED Inc
|
1,069,390 | $174,866,652 | |
| 6 | RVMD |
Revolution Medicines, Inc.
|
1,735,476 | $168,775,041 | |
| 7 | INCY |
Incyte Corp
|
1,729,102 | $162,743,080 | |
| 8 | BBIO |
BridgeBio Pharma, Inc.
|
1,976,094 | $146,744,740 |
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. | ||||||