ALGM Institutional Ownership
Who owns Allegro Microsystems, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 375 funds reported holding ALGM at Jun 30, 2026, together owning 79.5% of the company.
- ▲211 buying vs 151 selling
- ▲Held by funds +5.3 pts
- ▲Funds holding +52
- ▼Superinvestors: 0 added, 4 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 375 | 323 | +16.1% |
| In funds' top 10 | 5 | 1 | +400.0% |
| 13F shares | 148M | 138M | +7.1% |
| Held by funds | 79.5% | 74.2% | +5.3 pts |
| New positions | 95 | 62 | +53.2% |
| Increased | 116 | 126 | −7.9% |
| Reduced | 108 | 86 | +25.6% |
| Sold out | 43 | 37 | +16.2% |
| Calls (shares) | 51K | 46K | +10.8% |
| Puts (shares) | 35K | 17K | +109.0% |
| Put/call ratio | 0.68 | 0.36 | +88.7% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ALGM
All superinvestors →
Who owns ALGM
share of fund held shares- Index and passive funds37.6%
- Active managers and hedge funds44.9%
- Banks and brokers15.8%
- Pensions, insurers and other1.8%
The top 10 holders own 69.8% of all ALGM shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
104 funds changed their position- Conestoga Capital Advisors, LLCNew+720K sh
- Braun Stacey Associates IncSold out−366K sh
- Paradice Investment Management LLCNew+473K sh
- Nippon Life Global Investors Americas, Inc.Sold out−144K sh
- Principal Financial Group IncAdded+240K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Fmr LLC | 13.72% | 25.6M | $1.8B | −1.8M |
| 2 | BlackRock, Inc. | 7.45% | 13.9M | $967M | +1.4M |
| 3 | Invesco Ltd. | 7.33% | 13.7M | $952M | +4.9M |
| 4 | Jpmorgan Chase & Co | 6.82% | 12.7M | $845M | +4.1M |
| 5 | Capital Research Global Investors | 6.44% | 12M | $836M | −429K |
| 6 | Vanguard Portfolio Management LLC | 4.11% | 7.7M | $534M | −252K |
| 7 | State Street Corp | 3.04% | 5.7M | $395M | +448K |
| 8 | Vanguard Capital Management LLC | 2.95% | 5.5M | $384M | +44K |
| 9 | Price T Rowe Associates Inc /md/ | 1.99% | 3.7M | $258M | +3.6M |
| 10 | Clearbridge Investments, LLC | 1.58% | 2.9M | $205M | +83K |
- Invesco Ltd.+4.9M sh+$343M
- Jpmorgan Chase & Co+4.1M sh+$270M
- Price T Rowe Associates Inc /md/+3.6M sh+$250M
- BlackRock, Inc.+1.4M sh+$97.1M
- Massachusetts Financial Services Co /ma/+1.4M sh+$95.7M
- Norges Bank+1.3M sh+$90.2M
- State Street Corp+448K sh+$31.2M
- Braun Stacey Associates Inc+366K sh+$25.5M
- Fmr LLC−1.8M sh−$128M
- Nomura Asset Management International Inc.−921K sh−$64.1M
- Marshall Wace, LLP−726K sh−$50.6M
- Segall Bryant & Hamill, LLC−713K sh−$49.6M
- Voya Investment Management LLC−492K sh−$34.3M
- Morgan Stanley−466K sh−$32.4M
- Capital Research Global Investors−429K sh−$29.9M
- Adage Capital Partners Gp, L.l.c.−343K sh−$23.9M
ALGM institutional ownership FAQ
Who owns the most ALGM stock?
In Q2 2026 13F filings the largest holder of ALGM was Fmr LLC, followed by BlackRock, Inc. and Invesco Ltd.. Index fund managers are usually the biggest holders of large companies.
What percentage of ALGM is owned by institutions?
Funds that file 13F reports held 79.5% of ALGM's shares at Jun 30, 2026, compared with 74.2% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ALGM?
In Q2 2026, 211 funds bought ALGM (95 of them new positions) and 151 sold (43 sold out completely). Among well known investors, 0 added and 4 cut. Our fund sentiment for ALGM is bullish.
What is ALGM's institutional put/call ratio?
Funds reported $2.4M of ALGM puts against $3.6M of calls, a put/call ratio of 0.68 (0.36 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ALGM ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.