Atea Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US04683R1068

SecurityAVIR / Atea Pharmaceuticals, Inc.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership379,314 shares
Latest Disclosed Value $ 2,040,710
D. E. Shaw & Co., Inc. reports 18.39% decrease in ownership of AVIR / Atea Pharmaceuticals, Inc.

On May 15, 2026 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 379,314 shares of Atea Pharmaceuticals, Inc. (US:AVIR) valued at $2,040,709 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 464,787 shares of Atea Pharmaceuticals, Inc.. This represents a change in shares of -18.39% during the quarter. The current value of the position is $1,596,912 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)
2026-05-15 2026-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 379,314 -85,473 -18.39 2,041 22.97 0.0012
2026-02-17 2025-12-31 13F ATEA PHARMACEUTICALS COM 04683R106 464,787 100,019 27.42 1,659 56.95 0.0009
2025-11-14 2025-09-30 13F ATEA PHARMACEUTICALS COM 04683R106 364,768 168,916 86.25 1,058 49.93 0.0006
2025-08-14 2025-06-30 13F ATEA PHARMACEUTICALS COM 04683R106 195,852 -148,693 -43.16 705 -31.55 0.0005
2025-05-15 2025-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 344,545 88,462 34.54 1,030 20.19 0.0009
2025-02-14 2024-12-31 13F ATEA PHARMACEUTICALS COM 04683R106 256,083 62,505 32.29 858 32.25 0.0006
2024-11-14 2024-09-30 13F ATEA PHARMACEUTICALS COM 04683R106 193,578 45,665 30.87 648 32.52 0.0006
2024-08-14 2024-06-30 13F ATEA PHARMACEUTICALS COM 04683R106 147,913 -59,846 -28.81 490 -41.72 0.0005
2024-05-15 2024-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 207,759 22,582 12.19 839 48.76 0.0007
2024-02-14 2023-12-31 13F ATEA PHARMACEUTICALS COM 04683R106 185,177 115,228 164.73 565 169.86 0.0005
2023-11-14 2023-09-30 13F ATEA PHARMACEUTICALS COM 04683R106 69,949 -13,473 -16.15 210 -32.80 0.0002
2023-08-14 2023-06-30 13F ATEA PHARMACEUTICALS COM 04683R106 83,422 33,724 67.86 312 87.35 0.0003
2023-05-15 2023-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 49,698 9,476 23.56 166 -13.99 0.0002
2023-02-14 2022-12-31 13F ATEA PHARMACEUTICALS COM 04683R106 40,222 11,065 37.95 193 16.27 0.0002
2022-11-14 2022-09-30 13F ATEA PHARMACEUTICALS COM 04683R106 29,157 29,157 166 0.0002
2022-05-16 2022-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 0 -19,404 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ATEA PHARMACEUTICALS COM 04683R106 19,404 19,404 173 0.0001
2021-08-16 2021-06-30 13F ATEA PHARMACEUTICALS COM 04683R106 0 -28,187 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ATEA PHARMACEUTICALS COM 04683R106 28,187 28,187 1,741 0.0017
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.