| JPMORGAN CHASE & CO |
| 12.7M |
| $844.9M |
| +47.1% |
| 6.829% |
| 0.05% |
| 5 | Capital Research Global Investors | 12.0M | $835.9M | -3.5% | 6.444% | 0.12% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.7M | $533.9M | -3.2% | 4.116% | 0.02% |
| 7 | STATE STREET CORP | 5.7M | $395.2M | +8.6% | 3.047% | 0.01% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 5.5M | $383.5M | +0.8% | 2.957% | 0.01% |
| 9 | Clearbridge Investments, LLC | 2.9M | $205.1M | +2.9% | 1.581% | 0.17% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $184.2M | +7.7% | 1.420% | 0.01% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 2.1M | $147.8M | -2.1% | 1.140% | 0.03% |
| 12 | MORGAN STANLEY | 1.8M | $126.0M | -20.5% | 0.971% | 0.01% |
| 13 | LOOMIS SAYLES & CO L P | 1.6M | $112.8M | -3.2% | 0.869% | 0.14% |
| 14 | GOLDMAN SACHS GROUP INC | 1.6M | $109.7M | +9.6% | 0.845% | 0.01% |
| 15 | PRINCIPAL FINANCIAL GROUP INC | 1.5M | $103.7M | -16.8% | 0.800% | 0.05% |
| 16 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.4M | $100.5M | +1983.1% | 0.775% | 0.03% |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4M | $94.7M | -2.2% | 0.730% | 0.01% |
| 18 | NORGES BANK | 1.3M | $90.2M | — | 0.695% | 0.01% |
| 19 | NORTHERN TRUST CORP | 1.2M | $81.3M | +11.6% | 0.626% | 0.01% |
| 20 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.2M | $80.7M | -44.3% | 0.622% | 0.12% |
| 21 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.1M | $78.1M | -23.4% | 0.602% | 0.11% |
| 22 | VOYA INVESTMENT MANAGEMENT LLC | 967K | $67.3M | -33.7% | 0.519% | 0.06% |
| 23 | RAYMOND JAMES FINANCIAL INC | 928K | $64.6M | -6.8% | 0.498% | 0.02% |
| 24 | BANK OF AMERICA CORP /DE/ | 922K | $64.2M | +7.8% | 0.495% | 0.00% |
| 25 | WELLINGTON MANAGEMENT GROUP LLP | 815K | $56.7M | +21.1% | 0.437% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ALGM — a direct measure of their conviction.
| 81.25% |
| 25.13 pp |
| $3.69B |
| 14% |
| Q4 2024 | 253 | +6.3% | 106.38% | +29.47 pp | $4.28B | +35% |
| Q3 2024 | 238 | — | 76.91% | — | $3.18B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
92 institutions opened new positions in ALGM during Q2 2026, while 38 fully exited. 243 added to existing positions and 29 trimmed.
ALGM institutional ownership rose by 5.22 percentage points quarter-over-quarter, with a net change of +58 holders.
The top 10 institutions account for 71.9% of all reported 13F value in ALGM, and the top 25 account for 85.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Allegro MicroSystems, Inc. (ALGM) Institutional Ownership