알티뮨(주)
US ˙ NasdaqGM ˙ US02155H2004

SecurityALT / Altimmune, Inc.
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in ALT / Altimmune, Inc.

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Altimmune, Inc. (US:ALT). This represents 0.0 percent ownership of the company. In their previous filing dated 2026-01-30 , Vanguard Group Inc had reported owning 9,491,159 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-26 2026-03-26 13G/A 9,491,159 0 -100.00 0.00 -100.00
2026-01-30 2026-01-30 13G/A 3,571,972 9,491,159 165.71 9.09 36.69
2024-02-13 2024-02-13 13G/A 2,532,420 3,571,972 41.05 6.65 29.13
2023-02-09 2023-02-09 13G 2,532,420 5.15

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-01-29 2025-12-31 13F ALTIMMUNE COM NEW 02155H200 9,491,159 3,117,521 48.91 34,263 42.60 0.0005
2025-11-07 2025-09-30 13F ALTIMMUNE COM NEW 02155H200 6,373,638 1,206,514 23.35 24,029 20.16 0.0004
2025-08-11 2025-06-30 13F ALTIMMUNE COM NEW 02155H200 5,167,124 759,662 17.24 19,997 -9.26 0.0003
2025-05-09 2025-03-31 13F ALTIMMUNE COM NEW 02155H200 4,407,462 -24,150 -0.54 22,037 -31.03 0.0004
2025-02-11 2024-12-31 13F ALTIMMUNE COM NEW 02155H200 4,431,612 -552,246 -11.08 31,952 4.42 0.0006
2024-11-13 2024-09-30 13F ALTIMMUNE COM NEW 02155H200 4,983,858 77,244 1.57 30,601 -6.22 0.0005
2024-08-13 2024-06-30 13F ALTIMMUNE COM NEW 02155H200 4,906,614 1,777,886 56.82 32,629 2.44 0.0006
2024-05-10 2024-03-31 13F ALTIMMUNE COM NEW 02155H200 3,128,728 -443,244 -12.41 31,850 -20.74 0.0006
2024-03-11 2023-12-31 13F/A-1 ALTIMMUNE COM NEW 02155H200 3,571,972 227,677 6.81 40,185 362.15 0.0009
2024-02-14 2023-12-31 13F ALTIMMUNE COM NEW 02155H200 3,571,972 227,677 40,185 0.0008
2023-12-18 2023-09-30 13F/A-1 ALTIMMUNE COM NEW 02155H200 3,344,295 38,323 1.16 8,695 -25.49 0.0002
2023-11-14 2023-09-30 13F ALTIMMUNE COM NEW 02155H200 3,344,295 38,323 8,695 0.0002
2023-08-14 2023-06-30 13F ALTIMMUNE COM NEW 02155H200 3,305,972 768,251 30.27 11,670 8.97 0.0003
2023-07-14 2023-03-31 13F/A-1 ALTIMMUNE COM NEW 02155H200 2,537,721 5,301 0.21 10,709 -74.29 0.0003
2023-05-15 2023-03-31 13F ALTIMMUNE COM NEW 02155H200 2,537,721 5,301 10,709 0.0003
2023-02-10 2022-12-31 13F ALTIMMUNE COM NEW 02155H200 2,532,420 505,378 24.93 41,658 60.93 0.0011
2022-11-14 2022-09-30 13F ALTIMMUNE COM NEW 02155H200 2,027,042 301,496 17.47 25,885 28.21 0.0008
2022-08-12 2022-06-30 13F ALTIMMUNE COM NEW 02155H200 1,725,546 -91,369 -5.03 20,189 82.46 0.0006
2022-05-13 2022-03-31 13F ALTIMMUNE COM NEW 02155H200 1,816,915 83,160 4.80 11,065 -30.33 0.0003
2022-02-14 2021-12-31 13F ALTIMMUNE COM NEW 02155H200 1,733,755 97,398 5.95 15,881 -14.19 0.0004
2021-11-12 2021-09-30 13F ALTIMMUNE COM NEW 02155H200 1,636,357 50,264 3.17 18,507 18.46 0.0005
2021-08-13 2021-06-30 13F ALTIMMUNE COM NEW 02155H200 1,586,093 258,883 19.51 15,623 -16.69 0.0004
2021-05-14 2021-03-31 13F ALTIMMUNE COM NEW 02155H200 1,327,210 89,984 7.27 18,753 34.37 0.0005
2021-02-12 2020-12-31 13F ALTIMMUNE COM NEW 02155H200 1,237,226 33,923 2.82 13,956 -12.14 0.0004
2020-11-16 2020-09-30 13F ALTIMMUNE COM NEW 02155H200 1,203,303 597,258 98.55 15,885 144.72 0.0005
2020-08-14 2020-06-30 13F ALTIMMUNE COM NEW 02155H200 606,045 25,336 4.36 6,491 248.23 0.0002
2020-05-15 2020-03-31 13F ALTIMMUNE COM NEW 02155H200 580,709 46,534 8.71 1,864 84.55 0.0001
2020-02-14 2019-12-31 13F ALTIMMUNE COM NEW 02155H200 534,175 0 0.00 1,010 -3.07 0.0000
2019-11-14 2019-09-30 13F ALTIMMUNE COM NEW 02155H200 534,175 54,540 11.37 1,042 -8.76 0.0000
2019-08-14 2019-06-30 13F ALTIMMUNE COM NEW 02155H200 479,635 109,977 29.75 1,142 6.53 0.0000
2019-05-15 2019-03-31 13F ALTIMMUNE COM NEW 02155H200 369,658 259,289 234.93 1,072 372.25 0.0000
2019-02-14 2018-12-31 13F ALTIMMUNE COM NEW 02155H200 110,369 -3,761,195 -97.15 227 -92.77 0.0000
2017-05-12 2017-03-31 13F PHARMATHENE COM 71714G102 3,871,564 1,885,939 94.98 3,141 -51.33 0.0002
2017-02-14 2016-12-31 13F PHARMATHENE COM 71714G102 1,985,625 36,712 1.88 6,454 14.19 0.0004
2016-11-14 2016-09-30 13F PHARMATHENE COM 71714G102 1,948,913 -9,282 -0.47 5,652 18.29 0.0003
2016-08-10 2016-06-30 13F PHARMATHENE COM 71714G102 1,958,195 201,439 11.47 4,778 43.92 0.0003
2016-05-13 2016-03-31 13F PHARMATHENE COM 71714G102 1,756,756 41,968 2.45 3,320 1.90 0.0002
2016-02-08 2015-12-31 13F PHARMATHENE COM 71714G102 1,714,788 115,322 7.21 3,258 53.17 0.0002
2015-11-12 2015-09-30 13F/A-1 PHARMATHENE COM 71714G102 1,599,466 3,925 0.25 2,127 -25.94 0.0001
2015-11-12 2015-09-30 13F/A-1 PHARMATHENE COM 71714G102 1,599,466 3,925 2,127 0.0001
2015-08-13 2015-06-30 13F PHARMATHENE COM 71714G102 1,595,541 -8,708 -0.54 2,872 9.83 0.0002
2015-05-15 2015-03-31 13F/A-1 PHARMATHENE COM 71714G102 1,604,249 13,150 0.83 2,615 -9.20 0.0002
2015-05-14 2015-03-31 13F PHARMATHENE COM 71714G102 1,604,249 2,615
2015-02-12 2014-12-31 13F PHARMATHENE COM 71714G102 1,591,099 200,177 14.39 2,880 16.32 0.0002
2014-11-12 2014-09-30 13F PHARMATHENE COM 71714G102 1,390,922 128,914 10.21 2,476 39.10 0.0002
2014-08-11 2014-06-30 13F PHARMATHENE COM 71714G102 1,262,008 0 0.00 1,780 -22.91 0.0001
2014-05-13 2014-03-31 13F PHARMATHENE COM 71714G102 1,262,008 117,351 10.25 2,309 8.45 0.0002
2014-02-12 2013-12-31 13F PHARMATHENE COM 71714G102 1,144,657 49,206 4.49 2,129 -7.43 0.0002
2013-11-07 2013-09-30 13F PHARMATHENE COM 71714G102 1,095,451 0 0.00 2,300 32.11 0.0002
2013-08-13 2013-06-30 13F PHARMATHENE COM 71714G102 1,095,451 1,095,451 1,741 0.0002
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.