aTyr Pharma, Inc.
DE ˙ DB ˙ US0021202025
0,39 € 0,00 (0,00%)
2026-06-04
DEL PRIS
SecurityDE:471A / aTyr Pharma, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership711,105 shares
Latest Disclosed Value $ 554,663
Northern Trust Corp reports 1.27% increase in ownership of 471A / aTyr Pharma, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 711,105 shares of aTyr Pharma, Inc. (DE:471A) valued at $383,997 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 702,186 shares of aTyr Pharma, Inc.. This represents a change in shares of 1.27% during the quarter. The current value of the position is $275,198 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ATYR PHARMA COM NEW 002120202 711,105 8,919 1.27 555 0.91 0.0000
2026-02-17 2025-12-31 13F ATYR PHARMA COM NEW 002120202 702,186 28,064 4.16 550 12.96 0.0001
2025-11-14 2025-09-30 13F ATYR PHARMA COM NEW 002120202 674,122 -6,814 -1.00 486 -85.92 0.0001
2025-08-13 2025-06-30 13F ATYR PHARMA COM NEW 002120202 680,936 494,319 264.88 3,452 513.14 0.0005
2025-05-13 2025-03-31 13F ATYR PHARMA COM NEW 002120202 186,617 3,992 2.19 564 -14.83 0.0001
2025-02-14 2024-12-31 13F ATYR PHARMA COM NEW 002120202 182,625 51,811 39.61 661 187.39 0.0001
2024-11-13 2024-09-30 13F ATYR PHARMA COM 002120202 130,814 12,358 10.43 230 25.00 0.0000
2024-08-14 2024-06-30 13F ATYR PHARMA COM 002120202 118,456 19,290 19.45 185 -4.66 0.0000
2024-05-14 2024-03-31 13F ATYR PHARMA COM 002120202 99,166 -936 -0.94 193 36.88 0.0000
2024-02-13 2023-12-31 13F ATYR PHARMA COM 002120202 100,102 21,583 27.49 141 13.71 0.0000
2023-11-13 2023-09-30 13F ATYR PHARMA COM 002120202 78,519 -37,410 -32.27 124 -50.40 0.0000
2023-08-11 2023-06-30 13F ATYR PHARMA COM 002120202 115,929 45,324 64.19 250 68.92 0.0000
2023-05-15 2023-03-31 13F ATYR PHARMA COM 002120202 70,605 24,734 53.92 148 48.00 0.0000
2023-02-13 2022-12-31 13F ATYR PHARMA COM 002120202 45,871 0 0.00 100 -27.54 0.0000
2022-11-14 2022-09-30 13F ATYR PHARMA COM 002120202 45,871 0 0.00 138 6.15 0.0000
2022-08-12 2022-06-30 13F ATYR PHARMA COM 002120202 45,871 1,465 3.30 130 -45.38 0.0000
2022-05-13 2022-03-31 13F ATYR PHARMA COM 002120202 44,406 0 0.00 238 -28.31 0.0000
2022-02-08 2021-12-31 13F ATYR PHARMA COM 002120202 44,406 19,733 79.98 332 48.21 0.0001
2021-11-15 2021-09-30 13F ATYR PHARMA COM 002120202 24,673 -1,432 -5.49 224 76.38 0.0000
2021-08-13 2021-06-30 13F ATYR PHARMA COM 002120202 26,105 4,072 18.48 127 29.59 0.0000
2021-05-12 2021-03-31 13F ATYR PHARMA COM 002120202 22,033 87 0.40 98 15.29 0.0000
2021-02-11 2020-12-31 13F ATYR PHARMA COM 002120202 21,946 1,288 6.23 85 26.87 0.0000
2020-11-16 2020-09-30 13F ATYR PHARMA COM 002120202 20,658 0 0.00 67 -27.17 0.0000
2020-08-14 2020-06-30 13F ATYR PHARMA COM 002120202 20,658 20,658 92 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.