Security record · archived quarter
ALGM
Allegro MicroSystems, Inc. · Technology · Semiconductors
108Tracked holders
-8Δ holders
117.16MShares held
$3.65BReported value
+5New positions
−14Exits
Momentum inputs (comparable managers):
holder breadth -6.9% ·
share flow +1.8% ·
net new positions -8.3%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | 0 | 27.62K | $1.00M | n/a | n/a |
| 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 | n/a |
| Q3 2025 | 18 | 0 | 84.17M | $2.46B | +1 | −2 |
| Q2 2025 | 16 | +3 | 70.10M | $2.40B | +3 | n/a |
| Q1 2025 | 10 | 0 | 21.03M | $528.55M | +1 | −1 |
| Q4 2024 | 10 | +1 | 20.68M | $452.03M | +1 | n/a |
| Q3 2024 | 8 | -3 | 12.20M | $284.36M | +1 | −4 |
| Q2 2024 | 11 | n/a | 5.92M | $167.08M | n/a | n/a |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 27.42M | +16.0% | $864.59M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 12.49M | +2.4% | $393.96M | 0.0% | ▲ Add | 4 | SEC ↗ ×16 |
| 3 | Capital Research Global Investors | 12.44M | -5.2% | $392.09M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 4 | Invesco Ltd. | 8.75M | +14.4% | $275.93M | 0.0% | ▲ Add | 2 | SEC ↗ ×11 |
| 5 | JPMorgan Chase ✦ | 8.65M | +17.8% | $242.60M | 0.0% | ▲ Add | 3 | SEC ↗ ×9 |
| 6 | Vanguard Capital Management Llc | 5.46M | n/a | $172.30M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | State Street Global Advisors ✦ (passive) | 5.23M | -2.5% | $164.84M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 8 | Clearbridge Investments, LLC | 2.86M | -1.8% | $90.29M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 9 | Geode Capital Management ✦ (passive) | 2.46M | +2.6% | $77.48M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 10 | Morgan Stanley ✦ | 2.28M | +1.9% | $71.74M | 0.0% | ▲ Add | 3 | SEC ↗ ×16 |
| 11 | Dimensional Fund Advisors Lp | 2.17M | +1.4% | $68.40M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 12 | Nomura Asset Management… | 2.08M | +2.2% | $65.60M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 13 | Principal Financial Group Inc | 1.79M | +2.8% | $56.45M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 14 | Loomis Sayles & Co L P | 1.67M | +101.9% | $52.78M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 15 | Adage Capital Partners ✦ | 1.46M | -47.8% | $46.18M | 0.1% | ▼ Trim | 8 | SEC ↗ |
| 16 | Voya Investment Management Llc | 1.46M | +55.2% | $46.01M | 0.1% | ▲ Add | 2 | SEC ↗ ×3 |
| 17 | Alliancebernstein L.P. | 1.72M | +50.0% | $45.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Goldman Sachs Group ✦ | 1.44M | +80.5% | $45.32M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 19 | Charles Schwab Investment… | 1.39M | +2.1% | $43.85M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Northern Trust Corp | 1.05M | +3.0% | $32.97M | 0.0% | ▲ Add | 2 | SEC ↗ ×6 |
| 21 | Raymond James Financial Inc | 995.75K | +9.6% | $31.40M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 22 | Nuveen, LLC | 947.50K | +291.6% | $29.87M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 23 | Bank Of America Corp /De/ | 855.45K | +48.4% | $26.97M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 24 | Bank of New York Mellon Corp | 743.29K | -1.0% | $23.44M | 0.0% | ▼ Trim | 2 | SEC ↗ ×12 |
| 25 | Marshall Wace ✦ | 739.78K | +3.5% | $23.33M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 26 | Wellington Management ✦ | 673.10K | -39.2% | $21.22M | 0.0% | ▼ Trim | 7 | SEC ↗ ×4 |
| 27 | Two Sigma Investments ✦ | 639.84K | +105.8% | $20.17M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 28 | UBS Group AG | 435.38K | +58.7% | $13.73M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 29 | First Trust Advisors Lp | 414.90K | -7.6% | $13.08M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 30 | Citadel Advisors ✦ | 399.44K | -84.4% | $12.59M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 31 | Ameriprise Financial Inc | 359.28K | -3.8% | $11.33M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 32 | UBS AM, a distinct business unit of… | 345.06K | +4.3% | $10.88M | 0.0% | ▲ Add | 2 | SEC ↗ ×9 |
| 33 | AQR Capital Management ✦ | 345.13K | +5.2% | $10.34M | 0.0% | ▲ Add | 5 | SEC ↗ ×7 |
| 34 | Allspring Global Investments… | 307.62K | -13.6% | $10.24M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 35 | Gotham Asset Management ✦ | 312.25K | +327.2% | $9.85M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 36 | Rhumbline Advisers | 308.41K | +2.7% | $9.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Man Group plc | 306.35K | -20.9% | $9.66M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 38 | Hrt Financial Lp | 261.77K | +189.8% | $8.25M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 39 | Swiss National Bank | 256.40K | +0.4% | $8.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Balyasny Asset Management L.P. | 245.91K | -69.7% | $7.75M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 41 | Sei Investments Co | 218.98K | +126.0% | $6.90M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 42 | Legal & General Group Plc | 164.67K | -11.3% | $5.19M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 43 | California State Teachers… | 149.83K | +21.8% | $4.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Quantinno Capital Management LP | 133.90K | +104.9% | $4.22M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 45 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 127.39K | +52.0% | $4.02M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Renaissance Technologies ✦ | 123.90K | -71.6% | $3.91M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 47 | Canada Pension Plan Investment Board | 122.00K | +577.8% | $3.85M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Susquehanna International Group, Llp | 115.38K | -14.1% | $3.64M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 49 | T. Rowe Price ✦ | 113.80K | +12.3% | $3.59M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 50 | Citigroup Inc | 106.15K | -0.1% | $3.35M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 51 | Russell Investments Group, Ltd. | 96.08K | +352.2% | $3.03M | 0.0% | ▲ Add | 2 | SEC ↗ ×7 |
| 52 | State Of Wisconsin Investment Board | 94.95K | -2.7% | $2.99M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | State Board Of Administration Of… | 92.80K | 0.0% | $2.93M | 0.0% | Held | 2 | SEC ↗ |
| 54 | Manufacturers Life Insurance… | 81.07K | -1.4% | $2.56M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | Wells Fargo & Company/Mn | 73.46K | +12.4% | $2.32M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 56 | Mitsubishi UFJ Asset Management… | 70.96K | -4.6% | $2.24M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 57 | Massachusetts Financial Services Co… | 69.30K | -13.6% | $2.18M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 58 | Neuberger Berman Group LLC | 57.98K | -51.6% | $1.83M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 59 | Janus Henderson Group Plc | 57.33K | 0.0% | $1.81M | 0.0% | Held | 2 | SEC ↗ |
| 60 | Zurcher Kantonalbank (Zurich… | 48.60K | +13.7% | $1.53M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 61 | New York State Common Retirement… | 46.34K | -9.0% | $1.46M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 62 | Envestnet Asset Management Inc | 44.94K | +22.1% | $1.42M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | Barclays Plc | 40.34K | -54.3% | $1.27M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 64 | Jones Financial Companies Lllp | 39.94K | +10466.7% | $1.20M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | Tudor Investment Corp Et Al | 37.13K | +44.7% | $1.17M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 66 | LPL Financial LLC | 36.08K | +11.1% | $1.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 67 | Creative Planning | 32.55K | +28.1% | $1.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Universal- Beteiligungs- und… | 30.86K | +80.6% | $973,112 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Royal Bank Of Canada | 30.34K | -19.2% | $957,000 | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 70 | Fifth Third Bancorp | 29.06K | +2377.7% | $916,358 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Tidal Investments LLC | 28.46K | +23.0% | $897,407 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Millennium Management ✦ | 28.13K | -97.9% | $886,844 | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 73 | Deutsche Bank Ag\ | 24.12K | +19.5% | $760,503 | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 74 | Sumitomo Mitsui Trust Group, Inc. | 23.71K | 0.0% | $747,639 | 0.0% | Held | 2 | SEC ↗ |
| 75 | Lazard Asset Management Llc | 23.71K | 0.0% | $747,639 | 0.0% | Held | 2 | SEC ↗ |
| 76 | Pictet Asset Management Holding SA | 22.38K | +7.7% | $705,547 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 77 | Bnp Paribas Financial Markets | 20.77K | -89.5% | $655,004 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 78 | Victory Capital Management Inc | 19.81K | +5.8% | $624,735 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Pacer Advisors, Inc. | 19.74K | -38.9% | $623,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | Hsbc Holdings Plc | 18.36K | -77.0% | $575,035 | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 81 | Rockefeller Capital Management L.P. | 17.12K | +1.5% | $539,921 | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 82 | Bridgewater Associates ✦ | 16.64K | New | $524,817 | 0.0% | New | 1 | SEC ↗ |
| 83 | ProShare Advisors LLC | 16.33K | -21.4% | $514,917 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 84 | American Century Companies Inc | 15.60K | +51.8% | $491,805 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 85 | Peak6 Llc | 15.50K | -71.9% | $488,810 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Jane Street Group, Llc | 15.48K | -91.5% | $488,053 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 87 | Mirae Asset Global Investments Co.… | 15.23K | +28.1% | $480,265 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Pnc Financial Services Group, Inc. | 13.95K | +18.0% | $439,813 | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 89 | Corient Private Wealth LP | 13.90K | -53.4% | $438,242 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | Cwm, Llc | 13.86K | -1.4% | $437,006 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 91 | Bank Of Montreal /Can/ | 13.14K | -6.6% | $414,399 | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 92 | Cetera Investment Advisers | 11.66K | -2.1% | $367,514 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 93 | Mercer Global Advisors Inc /Adv | 11.35K | +8.1% | $357,869 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Mml Investors Services, Llc | 10.97K | -64.5% | $346,045 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Captrust Financial Advisors | 10.91K | New | $343,901 | 0.0% | New | 1 | SEC ↗ |
| 96 | Wealth Enhancement Advisory… | 10.13K | -8.6% | $330,278 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | Federated Hermes, Inc. | 9.87K | -1.1% | $311,138 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 98 | Group One Trading Llc | 9.41K | New | $296,823 | 0.0% | New | 1 | SEC ↗ |
| 99 | Prudential Financial Inc | 7.39K | -9.4% | $233,164 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 100 | Ensign Peak Advisors, Inc | 6.37K | 0.0% | $200,720 | 0.0% | Held | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Bridgewater Associates | $524,817 | 0.0% |
| Captrust Financial Advisors | $343,901 | 0.0% |
| Group One Trading Llc | $296,823 | 0.0% |
Exited
| Norges Bank | $38.46M | was 0.0% |
| Point72 Asset Management | $29.53M | was 0.0% |
| Alyeska Investment Group, L.P. | $10.55M | was 0.0% |
| Squarepoint Ops LLC | $9.34M | was 0.0% |
| D. E. Shaw & Co. | $1.46M | was 0.0% |
| Qube Research & Technologies… | $1.27M | was 0.0% |
| Amundi | $613,493 | was 0.0% |
| Parallax Volatility Advisers… | $456,137 | was 0.0% |
| Holocene Advisors, LP | $341,938 | was 0.0% |
| Mitsubishi UFJ Trust &… | $336,398 | was 0.0% |
| IMC-Chicago, LLC | $280,103 | was 0.0% |
| Stifel Financial Corp | $265,122 | 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: Q1 2026 ·
Methodology ·
Get this via the API