Security record
ALT
Altimmune, Inc. · Healthcare · Biotechnology
82Tracked holders
+6Δ holders
85.94MShares held
$261.24MReported value
+14New positions
−8Exits
Momentum inputs (comparable managers):
holder breadth +7.9% ·
share flow +30.0% ·
net new positions +7.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 82 | +6 | 85.94M | $261.24M | +14 | −8 |
| Q1 2026 | 78 | 0 | 58.31M | $179.46M | +8 | −8 |
| Q4 2025 | 77 | +2 | 45.71M | $165.02M | +3 | −1 |
| Q3 2025 | 15 | 0 | 25.85M | $97.47M | +1 | −1 |
| Q2 2025 | 12 | +1 | 18.03M | $69.77M | +1 | — |
| Q1 2025 | 8 | -2 | 8.83M | $44.16M | — | −2 |
| Q4 2024 | 10 | +1 | 7.53M | $54.26M | +1 | — |
| Q3 2024 | 8 | 0 | 3.66M | $22.46M | — | — |
| Q2 2024 | 8 | — | 3.17M | $21.05M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 20.39M | +59.3% | $61.97M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 11 | State Street Global Advisors ✦ (passive) | 12.10M | +69.3% | $36.78M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 12 | Vanguard Capital Management Llc | 8.18M | +44.5% | $24.86M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | Marshall Wace ✦ | 6.84M | +70.3% | $20.80M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | Marshall Wace ✦ | 6.84M | +70.3% | $20.80M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | Marshall Wace ✦ | 6.84M | +70.3% | $20.80M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | Viking Global Investors ✦ | 6.70M | New | $20.37M | 0.1% | New | 1 | SEC ↗ |
| 17 | Geode Capital Management ✦ (passive) | 5.01M | +61.3% | $15.24M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 18 | Geode Capital Management ✦ (passive) | 5.01M | +61.3% | $15.24M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 19 | Millennium Management ✦ | 3.31M | +1.6% | $10.06M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 20 | Nuveen, LLC | 2.41M | +3.0% | $7.31M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 21 | Nuveen, LLC | 2.41M | +3.0% | $7.31M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | Nuveen, LLC | 2.41M | +3.0% | $7.31M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | Two Sigma Investments ✦ | 2.38M | -3.9% | $7.24M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 24 | Goldman Sachs Group ✦ | 2.21M | +64.0% | $6.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 25 | Goldman Sachs Group ✦ | 2.21M | +64.0% | $6.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 26 | Northern Trust Corp | 1.60M | +60.5% | $4.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | Northern Trust Corp | 1.60M | +60.5% | $4.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 28 | Northern Trust Corp | 1.60M | +60.5% | $4.86M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 29 | AQR Capital Management ✦ | 1.22M | +1328.8% | $3.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 30 | AQR Capital Management ✦ | 1.22M | +1328.8% | $3.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 1.22M | +1328.8% | $3.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 1.22M | +1328.8% | $3.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 33 | Citadel Advisors ✦ | 983.56K | +119.1% | $2.99M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 34 | Citadel Advisors ✦ | 983.56K | +119.1% | $2.99M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 35 | UBS Group AG | 866.38K | -4.2% | $2.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 36 | UBS Group AG | 866.38K | -4.2% | $2.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 37 | UBS Group AG | 866.38K | -4.2% | $2.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 38 | UBS Group AG | 866.38K | -4.2% | $2.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 42 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 43 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 44 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 45 | Morgan Stanley ✦ | 758.43K | -2.2% | $2.31M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 46 | Bank Of America Corp /De/ | 757.92K | +32.9% | $2.30M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 47 | Bank Of America Corp /De/ | 757.92K | +32.9% | $2.30M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | Fidelity (FMR) ✦ | 748.97K | +11.1% | $2.28M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 49 | Fidelity (FMR) ✦ | 748.97K | +11.1% | $2.28M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 50 | Susquehanna International Group, Llp | 731.08K | -44.9% | $2.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 51 | Susquehanna International Group, Llp | 731.08K | -44.9% | $2.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Bank of New York Mellon Corp | 689.71K | +66.8% | $2.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Bank of New York Mellon Corp | 689.71K | +66.8% | $2.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 54 | Bank of New York Mellon Corp | 689.71K | +66.8% | $2.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | Bank of New York Mellon Corp | 689.71K | +66.8% | $2.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | Bank of New York Mellon Corp | 689.71K | +66.8% | $2.10M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 57 | Dimensional Fund Advisors Lp | 639.44K | -38.9% | $1.94M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Dimensional Fund Advisors Lp | 639.44K | -38.9% | $1.94M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Dimensional Fund Advisors Lp | 639.44K | -38.9% | $1.94M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | Dimensional Fund Advisors Lp | 639.44K | -38.9% | $1.94M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Charles Schwab Investment… | 624.50K | +77.6% | $1.90M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | Point72 Asset Management ✦ | 486.88K | -26.8% | $1.48M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | Wellington Management ✦ | 420.30K | +69.4% | $1.28M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 64 | Wellington Management ✦ | 420.30K | +69.4% | $1.28M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 65 | Wellington Management ✦ | 420.30K | +69.4% | $1.28M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 66 | Bnp Paribas Financial Markets | 371.18K | -14.7% | $1.13M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | Barclays Plc | 351.59K | +82.3% | $1.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 68 | Barclays Plc | 351.59K | +82.3% | $1.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 69 | Invesco Ltd. | 332.59K | +46.0% | $1.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Invesco Ltd. | 332.59K | +46.0% | $1.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Invesco Ltd. | 332.59K | +46.0% | $1.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 72 | Rhumbline Advisers | 309.61K | +98.9% | $941,193 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 73 | LMR Partners LLP | 300.00K | New | $912,000 | 0.0% | New | 1 | SEC ↗ |
| 74 | Citigroup Inc | 293.95K | +285.1% | $893,602 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 75 | Citigroup Inc | 293.95K | +285.1% | $893,602 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 76 | Baird Financial Group, Inc. | 237.52K | 0.0% | $722,067 | 0.0% | Held | 3 | SEC ↗ |
| 77 | Creative Planning | 218.28K | +456.4% | $663,574 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | Creative Planning | 218.28K | +456.4% | $663,574 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | Wells Fargo & Company/Mn | 217.43K | +126.7% | $660,986 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | Wells Fargo & Company/Mn | 217.43K | +126.7% | $660,986 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 81 | Wells Fargo & Company/Mn | 217.43K | +126.7% | $660,986 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | Commonwealth Equity Services, Llc | 214.57K | +33.8% | $652,300 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 83 | Squarepoint Ops LLC | 202.38K | +1016.5% | $615,235 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 84 | D. E. Shaw & Co. ✦ | 201.64K | -72.3% | $612,979 | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 85 | D. E. Shaw & Co. ✦ | 201.64K | -72.3% | $612,979 | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 86 | Deutsche Bank Ag\ | 195.01K | +56.6% | $592,843 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 87 | Deutsche Bank Ag\ | 195.01K | +56.6% | $592,843 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 88 | Stifel Financial Corp | 192.37K | +42.9% | $584,799 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 89 | Man Group plc | 173.87K | +33.9% | $528,571 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 90 | T. Rowe Price ✦ | 165.39K | +78.8% | $503,000 | 0.0% | ▲ Add | 9 | SEC ↗ |
| 91 | Alliancebernstein L.P. | 140.85K | +96.3% | $433,818 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | LPL Financial LLC | 121.95K | +17.5% | $370,734 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 93 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 117.68K | +52.3% | $355,139 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 94 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 117.68K | +52.3% | $355,139 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | JPMorgan Chase ✦ | 106.62K | -16.4% | $313,479 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 96 | JPMorgan Chase ✦ | 106.62K | -16.4% | $313,479 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 97 | JPMorgan Chase ✦ | 106.62K | -16.4% | $313,479 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 98 | JPMorgan Chase ✦ | 106.62K | -16.4% | $313,479 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 99 | JPMorgan Chase ✦ | 106.62K | -16.4% | $313,479 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 100 | Mariner, LLC | 101.12K | New | $307,407 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Viking Global Investors | $20.37M | 0.1% |
| LMR Partners LLP | $912,000 | 0.0% |
| Mariner, LLC | $307,407 | 0.0% |
Exited
| Alyeska Investment Group, L.P. | $8.15M | was 0.0% |
| Schroder Investment… | $1.92M | was 0.0% |
| American Century Companies Inc | $193,760 | was 0.0% |
| Simplex Trading, Llc | $70,350 | was 0.0% |
| Quantinno Capital Management… | $32,759 | was 0.0% |
| IMC-Chicago, LLC | $30,812 | was 0.0% |
| Group One Trading Llc | $20,621 | was 0.0% |
| Us Bancorp \De\ | $2,741 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 170 holders, 69.15M shares, $212.24M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Aug 13
Durso Jerome Benedict
Officer, Director · President and CEO · 15.00K sh @ 2.95 · $44,250
Open-market sales (S)
No open-market insider sales in our coverage window.
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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