Security record
ALGM
Allegro MicroSystems, Inc. · Technology · Semiconductors
111Tracked holders
+5Δ holders
129.92MShares held
$8.95BReported value
+15New positions
−9Exits
Momentum inputs (comparable managers):
holder breadth +4.7% ·
share flow +9.9% ·
net new positions +5.4%
— 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 | 111 | +5 | 129.92M | $8.95B | +15 | −9 |
| Q1 2026 | 108 | -8 | 117.16M | $3.65B | +5 | −14 |
| Q4 2025 | 117 | +2 | 125.26M | $3.30B | +3 | — |
| Q3 2025 | 18 | 0 | 84.17M | $2.46B | +1 | −2 |
| Q2 2025 | 16 | +3 | 70.10M | $2.40B | +3 | — |
| Q1 2025 | 10 | 0 | 21.03M | $528.55M | +1 | −1 |
| Q4 2024 | 10 | +1 | 20.68M | $452.03M | +1 | — |
| Q3 2024 | 8 | -3 | 12.20M | $284.36M | +1 | −4 |
| Q2 2024 | 11 | — | 5.92M | $167.08M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 25.58M | -6.7% | $1.78B | 0.1% | ▼ Trim | 5 | SEC ↗ ×6 |
| 2 | BlackRock ✦ (passive) | 13.89M | +11.2% | $966.97M | 0.0% | ▲ Add | 5 | SEC ↗ ×17 |
| 3 | Invesco Ltd. | 13.68M | +56.3% | $952.29M | 0.1% | ▲ Add | 3 | SEC ↗ ×11 |
| 4 | JPMorgan Chase ✦ | 12.72M | +47.1% | $844.87M | 0.0% | ▲ Add | 4 | SEC ↗ ×12 |
| 5 | Capital Research Global Investors | 12.01M | -3.5% | $835.89M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 6 | State Street Global Advisors ✦ (passive) | 5.68M | +8.6% | $395.19M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 7 | Vanguard Capital Management Llc | 5.51M | +0.8% | $383.52M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | T. Rowe Price ✦ | 3.71M | +3160.4% | $258.31M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 9 | Clearbridge Investments, LLC | 2.95M | +2.9% | $205.12M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 10 | Geode Capital Management ✦ (passive) | 2.64M | +7.7% | $184.18M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 11 | Dimensional Fund Advisors Lp | 2.12M | -2.1% | $147.85M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 12 | Morgan Stanley ✦ | 1.81M | -20.5% | $125.97M | 0.0% | ▼ Trim | 4 | SEC ↗ ×16 |
| 13 | Loomis Sayles & Co L P | 1.62M | -3.2% | $112.78M | 0.1% | ▼ Trim | 3 | SEC ↗ ×2 |
| 14 | Goldman Sachs Group ✦ | 1.58M | +9.6% | $109.66M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 15 | Principal Financial Group Inc | 1.49M | -16.8% | $103.72M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 16 | Massachusetts Financial Services Co… | 1.44M | +1983.1% | $100.49M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 17 | Charles Schwab Investment… | 1.36M | -2.2% | $94.72M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 18 | Norges Bank ✦ (passive) | 1.29M | New | $90.15M | 0.0% | New | 1 | SEC ↗ |
| 19 | Northern Trust Corp | 1.17M | +11.6% | $81.26M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 20 | Nomura Asset Management… | 1.16M | -44.3% | $80.72M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 21 | Adage Capital Partners ✦ | 1.12M | -23.4% | $78.11M | 0.1% | ▼ Trim | 9 | SEC ↗ |
| 22 | Voya Investment Management Llc | 966.87K | -33.7% | $67.31M | 0.1% | ▼ Trim | 3 | SEC ↗ ×3 |
| 23 | Raymond James Financial Inc | 928.06K | -6.8% | $64.61M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 24 | Bank Of America Corp /De/ | 921.73K | +7.8% | $64.17M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 25 | Wellington Management ✦ | 814.94K | +21.1% | $56.74M | 0.0% | ▲ Add | 8 | SEC ↗ ×3 |
| 26 | UBS Group AG | 780.95K | +79.4% | $54.37M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 27 | Nuveen, LLC | 722.64K | -23.7% | $50.31M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 28 | Bank of New York Mellon Corp | 716.95K | -3.5% | $49.91M | 0.0% | ▼ Trim | 3 | SEC ↗ ×12 |
| 29 | First Trust Advisors Lp | 684.02K | +64.9% | $47.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 30 | Ameriprise Financial Inc | 608.79K | +69.5% | $42.95M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 31 | Allspring Global Investments… | 620.54K | +101.7% | $39.22M | 0.1% | ▲ Add | 3 | SEC ↗ ×2 |
| 32 | Alliancebernstein L.P. | 1.20M | -30.3% | $37.87M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 33 | AQR Capital Management ✦ | 493.75K | +43.1% | $33.42M | 0.0% | ▲ Add | 6 | SEC ↗ ×7 |
| 34 | Two Sigma Investments ✦ | 343.99K | -46.2% | $23.95M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 35 | Rhumbline Advisers | 333.51K | +8.1% | $23.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 36 | CIBC Bancorp USA Inc. | 327.54K | New | $22.81M | 0.0% | New | 1 | SEC ↗ ×2 |
| 37 | Gotham Asset Management ✦ | 325.44K | +4.2% | $22.66M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 38 | UBS AM, a distinct business unit of… | 323.30K | -6.3% | $22.51M | 0.0% | ▼ Trim | 3 | SEC ↗ ×10 |
| 39 | Hrt Financial Lp | 316.44K | +20.9% | $22.03M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 40 | Russell Investments Group, Ltd. | 272.40K | +183.5% | $18.96M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 41 | Balyasny Asset Management L.P. | 267.28K | +8.7% | $18.61M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 42 | Swiss National Bank | 250.90K | -2.1% | $17.47M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 43 | Federated Hermes, Inc. | 237.37K | +2305.4% | $16.53M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 44 | Susquehanna International Group, Llp | 178.57K | +54.8% | $12.43M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 45 | Sei Investments Co | 169.64K | -22.5% | $11.81M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 46 | Quantinno Capital Management LP | 166.22K | +24.1% | $11.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 47 | Legal & General Group Plc | 164.73K | 0.0% | $11.47M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 48 | Citigroup Inc | 148.21K | +39.6% | $10.32M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 49 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 133.90K | +5.1% | $9.32M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 50 | Royal Bank Of Canada | 108.50K | +257.6% | $7.55M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 51 | State Board Of Administration Of… | 96.18K | +3.6% | $6.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 52 | Man Group plc | 95.10K | -69.0% | $6.62M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 53 | Wells Fargo & Company/Mn | 94.92K | +29.2% | $6.61M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 54 | Manufacturers Life Insurance… | 91.62K | +13.0% | $6.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | New York State Common Retirement… | 89.12K | +92.3% | $6.20M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | Deutsche Bank Ag\ | 88.76K | +268.0% | $6.18M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 57 | State Of Wisconsin Investment Board | 88.09K | -7.2% | $6.13M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Envestnet Asset Management Inc | 85.88K | +91.1% | $5.98M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 59 | LPL Financial LLC | 71.59K | +98.4% | $4.98M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | Holocene Advisors, LP | 63.01K | New | $4.39M | 0.0% | New | 1 | SEC ↗ |
| 61 | Zurcher Kantonalbank (Zurich… | 61.15K | +25.8% | $4.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | Neuberger Berman Group LLC | 59.20K | +2.1% | $4.12M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 63 | Jones Financial Companies Lllp | 64.92K | +62.5% | $3.76M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Amundi | 49.27K | New | $3.43M | 0.0% | New | 1 | SEC ↗ |
| 65 | Canada Pension Plan Investment Board | 44.00K | -63.9% | $3.06M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 66 | Mitsubishi UFJ Asset Management… | 43.19K | -39.1% | $3.01M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | Stifel Financial Corp | 42.04K | New | $2.93M | 0.0% | New | 1 | SEC ↗ |
| 68 | Creative Planning | 39.97K | +22.8% | $2.78M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 69 | Cetera Investment Advisers | 39.15K | +235.9% | $2.73M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Fifth Third Bancorp | 30.45K | +4.8% | $2.12M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Hsbc Holdings Plc | 26.86K | +46.4% | $1.87M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 72 | Universal- Beteiligungs- und… | 26.79K | -13.2% | $1.86M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 73 | Mitsubishi UFJ Trust & Banking Corp | 26.36K | New | $1.83M | 0.0% | New | 1 | SEC ↗ ×2 |
| 74 | Prudential Financial Inc | 25.80K | +248.8% | $1.80M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 75 | Lazard Asset Management Llc | 23.71K | 0.0% | $1.65M | 0.0% | Held | 3 | SEC ↗ |
| 76 | Sumitomo Mitsui Trust Group, Inc. | 23.71K | 0.0% | $1.65M | 0.0% | Held | 3 | SEC ↗ |
| 77 | American Century Companies Inc | 23.25K | +49.0% | $1.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | Bnp Paribas Financial Markets | 20.89K | +0.6% | $1.45M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | Victory Capital Management Inc | 20.18K | +1.8% | $1.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | Pictet Asset Management Holding SA | 19.57K | -12.5% | $1.36M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 81 | Corient Private Wealth LP | 19.41K | +39.6% | $1.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | Rockefeller Capital Management L.P. | 17.98K | +5.0% | $1.25M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 83 | Barclays Plc | 17.74K | -56.0% | $1.23M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 84 | IMC-Chicago, LLC | 17.23K | New | $1.20M | 0.0% | New | 1 | SEC ↗ |
| 85 | Tidal Investments LLC | 16.73K | -41.2% | $1.16M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 86 | Pnc Financial Services Group, Inc. | 16.46K | +18.0% | $1.15M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 87 | Pacer Advisors, Inc. | 14.75K | -25.3% | $1.03M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 88 | Mirae Asset Global Investments Co.… | 14.34K | -5.9% | $998,281 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 89 | ProShare Advisors LLC | 13.41K | -17.9% | $933,395 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 90 | Marshall Wace ✦ | 13.31K | -98.2% | $926,572 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 91 | Mercer Global Advisors Inc /Adv | 13.15K | +15.9% | $915,698 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | Cerity Partners LLC | 12.01K | New | $836,040 | 0.0% | New | 1 | SEC ↗ ×3 |
| 93 | Bank Of Montreal /Can/ | 10.80K | -17.9% | $751,687 | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 94 | Captrust Financial Advisors | 10.14K | -7.1% | $705,692 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Truist Financial Corp | 9.17K | New | $638,137 | 0.0% | New | 1 | SEC ↗ ×2 |
| 96 | Wealth Enhancement Advisory… | 10.94K | +8.0% | $600,509 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 97 | Osaic Holdings, Inc. | 7.23K | +203.3% | $503,589 | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 98 | Ensign Peak Advisors, Inc | 6.37K | 0.0% | $443,201 | 0.0% | Held | 3 | SEC ↗ |
| 99 | Assetmark, Inc | 6.31K | -0.5% | $439,093 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 100 | HighTower Advisors, LLC | 6.23K | New | $433,941 | 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
| Norges Bank | $90.15M | 0.0% |
| CIBC Bancorp USA Inc. | $22.81M | 0.0% |
| Holocene Advisors, LP | $4.39M | 0.0% |
| Amundi | $3.43M | 0.0% |
| Stifel Financial Corp | $2.93M | 0.0% |
| Mitsubishi UFJ Trust &… | $1.83M | 0.0% |
| IMC-Chicago, LLC | $1.20M | 0.0% |
| Cerity Partners LLC | $836,040 | 0.0% |
| Truist Financial Corp | $638,137 | 0.0% |
| HighTower Advisors, LLC | $433,941 | 0.0% |
Exited
| Citadel Advisors | $12.59M | was 0.0% |
| Renaissance Technologies | $3.91M | was 0.0% |
| Tudor Investment Corp Et Al | $1.17M | was 0.0% |
| Millennium Management | $886,844 | was 0.0% |
| Bridgewater Associates | $524,817 | was 0.0% |
| Peak6 Llc | $488,810 | was 0.0% |
| Mml Investors Services, Llc | $346,045 | was 0.0% |
| Walleye Trading LLC | $110,828 | was 0.0% |
| Simplex Trading, Llc | $4,855 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 316 holders, 129.66M shares, $4.00B 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)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 17
Raubacher Jennie
Director · 1.00K sh · $45,320
Aug 10
Hagen Erin
Officer · 2.29K sh · $101,431
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Oct 07
SC 13G/A — FMR LLC
Aug 13
SC 13G — Invesco Ltd.
Aug 06
SC 13G/A — FMR LLC
Jul 27
SC 13G/A — BlackRock, Inc.
Jul 16
SC 13G — JPMORGAN CHASE & CO
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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