| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.6% | -12% | $23,736,362 | -$100,148 | 6,133,427 | -0.42% | BlackRock, Inc. | 30 Jun 2025 |
| AMERIPRISE FINANCIAL INC | 1.9% | -79% | $7,306,296 | -$19,283,488 | 1,443,932 | -73% | Ameriprise Financial, Inc. | 31 Mar 2025 |
As of 30 Sep 2025, 157 institutional investors reported holding 41,476,255 shares of Altimmune, Inc. - Common Stock (ALT). This represents 51% of the company’s total 80,702,987 outstanding shares.
The largest institutional shareholders of Altimmune, Inc. - Common Stock (ALT) together control 44% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 7.9% | 6,373,638 | +23% | 0% | $24,028,615 |
| BlackRock, Inc. | 7.9% | 6,373,259 | +0.01% | 0% | $24,027,185 |
| STATE STREET CORP | 4.5% | 3,601,255 | +31% | 0% | $13,576,731 |
| TANG CAPITAL MANAGEMENT LLC | 2.6% | 2,131,307 | -22% | 0.31% | $8,035,027 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 2,017,385 | +4.3% | 0% | $7,607,047 |
| TWO SIGMA INVESTMENTS, LP | 2.5% | 1,996,848 | +357% | 0.01% | $7,528,117 |
| MORGAN STANLEY | 1.8% | 1,491,049 | +78% | 0% | $5,621,255 |
| TWO SIGMA ADVISERS, LP | 1.8% | 1,428,400 | +1006% | 0.01% | $5,385,068 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.7% | 1,374,182 | -15% | 0.01% | $5,180,666 |
| CITADEL ADVISORS LLC | 1.6% | 1,282,014 | +145% | 0% | $4,833,193 |
| Knoll Capital Management, LLC | 1.4% | 1,121,524 | 0% | 2.3% | $4,228,145 |
| NORTHERN TRUST CORP | 0.81% | 657,016 | +2.6% | 0% | $2,476,950 |
| UBS Group AG | 0.8% | 642,837 | -28% | 0% | $2,423,496 |
| Squarepoint Ops LLC | 0.72% | 584,696 | 0% | $2,204,304 | |
| GOLDMAN SACHS GROUP INC | 0.7% | 562,257 | +13% | 0% | $2,119,709 |
| Point72 Asset Management, L.P. | 0.59% | 476,926 | 0% | $1,798,010 | |
| FMR LLC | 0.55% | 445,137 | +11% | 0% | $1,678,167 |
| Beirne Wealth Consulting Services, LLC | 0.51% | 410,458 | +20% | 0.37% | $1,547,427 |
| MILLENNIUM MANAGEMENT LLC | 0.46% | 367,582 | +369% | 0% | $1,385,784 |
| D. E. Shaw & Co., Inc. | 0.45% | 360,395 | +603% | 0% | $1,358,689 |
| Bank of New York Mellon Corp | 0.42% | 341,985 | +3% | 0% | $1,289,285 |
| BARCLAYS PLC | 0.42% | 340,283 | +17% | 0% | $1,282,867 |
| BANK OF AMERICA CORP /DE/ | 0.4% | 320,440 | -55% | 0% | $1,208,059 |
| DIMENSIONAL FUND ADVISORS LP | 0.37% | 297,789 | -33% | 0% | $1,122,734 |
| JANE STREET GROUP, LLC | 0.35% | 280,199 | 0% | $1,056,350 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 229,511 | $828,361 | +$1,525 | $3.61 | 10 |
| 2025 Q3 | 41,476,255 | $156,373,200 | +$14,303,370 | $3.77 | 157 |
| 2025 Q2 | 37,594,851 | $145,435,659 | -$6,199,092 | $3.87 | 179 |
| 2025 Q1 | 38,134,819 | $190,969,777 | -$15,358,703 | $5.00 | 173 |
| 2024 Q4 | 40,453,394 | $291,649,491 | +$7,414,850 | $7.21 | 180 |
| 2024 Q3 | 39,490,913 | $242,642,286 | -$19,754,298 | $6.14 | 167 |
| 2024 Q2 | 42,376,353 | $281,796,522 | -$21,723,923 | $6.65 | 173 |
| 2024 Q1 | 44,351,359 | $451,471,154 | +$108,533,821 | $10.18 | 166 |
| 2023 Q4 | 33,518,969 | $377,122,817 | +$87,837,677 | $11.25 | 142 |
| 2023 Q3 | 30,119,653 | $78,312,976 | -$14,266,982 | $2.60 | 110 |
| 2023 Q2 | 35,266,907 | $124,503,782 | -$30,995,734 | $3.53 | 118 |
| 2023 Q1 | 40,146,839 | $169,418,214 | -$115,027,226 | $4.22 | 129 |
| 2022 Q4 | 46,782,400 | $769,520,216 | +$29,466,534 | $16.45 | 122 |
| 2022 Q3 | 46,027,433 | $587,716,469 | +$80,574,668 | $12.77 | 116 |
| 2022 Q2 | 39,903,915 | $466,872,641 | +$78,793,572 | $11.70 | 102 |
| 2022 Q1 | 33,651,643 | $207,371,526 | +$5,868,022 | $6.09 | 96 |
| 2021 Q4 | 32,470,413 | $295,787,573 | -$27,220,088 | $9.16 | 98 |
| 2021 Q3 | 32,076,209 | $363,055,937 | +$59,058,531 | $11.31 | 113 |
| 2021 Q2 | 27,191,172 | $267,846,675 | +$16,710,421 | $9.85 | 102 |
| 2021 Q1 | 23,819,490 | $336,535,131 | +$49,552,065 | $14.13 | 92 |
| 2020 Q4 | 20,471,521 | $230,916,860 | -$28,712,052 | $11.28 | 83 |
| 2020 Q3 | 21,898,188 | $289,049,000 | +$115,723,197 | $13.20 | 67 |
| 2020 Q2 | 13,311,955 | $142,567,171 | +$125,471,540 | $10.71 | 53 |
| 2020 Q1 | 1,583,373 | $5,082,210 | +$1,206,160 | $3.21 | 20 |
| 2019 Q4 | 1,281,842 | $2,423,890 | +$314,812 | $1.89 | 21 |
| 2019 Q3 | 1,113,862 | $2,171,952 | +$159,903 | $1.95 | 22 |
| 2019 Q2 | 1,032,457 | $2,456,382 | -$456,118 | $2.37 | 15 |
| 2019 Q1 | 1,114,198 | $3,229,903 | +$1,231,709 | $2.90 | 13 |
| 2018 Q4 | 806,802 | $1,663,208 | +$928,520 | $2.06 | 16 |
| 2018 Q3 | 193,862 | $853,444 | +$853,440 | $4.40 | 7 |