Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in APH held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 101.3M | $17.85B | -0.7% | 7.794% | 0.27% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 80.3M | $14.17B | +0.6% | 6.185% | 0.30% |
| 3 | FMR LLC | 70.6M | $12.44B | -11.2% | 5.432% | 0.54% |
| 4 | STATE STREET CORP | 59.5M | $10.50B | +3.6% | 4.580% | 0.16% |
| 5 | Capital International Investors | 43.0M | $7.59B | +21.8% | 3.313% | 1.57% |
| 6 | JPMORGAN CHASE & CO | 39.2M | $6.52B | -20.4% | 3.018% | 0.36% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 35.7M | $6.29B | -0.4% | 2.747% | 0.28% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 31.1M | $5.47B | -0.7% | 2.392% | 0.29% |
| 9 | Capital Research Global Investors | 29.5M | $5.20B | +10.7% | 2.270% | 0.73% |
| 10 | MORGAN STANLEY | 20.6M | $3.63B | +17.5% | 1.584% | 0.19% |
| 11 | NORGES BANK | 19.2M | $3.38B | — | 1.478% | 0.34% |
| 12 | WELLINGTON MANAGEMENT GROUP LLP | 16.6M | $2.92B | +10.5% | 1.276% | 0.50% |
| 13 | BANK OF AMERICA CORP /DE/ | 16.2M | $2.86B | -21.6% | 1.247% | 0.18% |
| 14 | Nuveen, LLC | 15.1M | $2.66B | +14.8% | 1.160% | 0.63% |
| 15 | Bank of New York Mellon Corp | 14.6M | $2.57B | -10.7% | 1.122% | 0.42% |
| 16 | NORTHERN TRUST CORP | 13.5M | $2.37B | -0.1% | 1.036% | 0.28% |
| 17 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 11.9M | $2.10B | +0.0% | 0.915% | 0.93% |
| 18 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 10.5M | $1.93B | -24.6% | 0.810% | 0.61% |
| 19 | GOLDMAN SACHS GROUP INC | 10.8M | $1.90B | -5.6% | 0.829% | 0.16% |
| 20 | ROYAL BANK OF CANADA | 10.1M | $1.78B | +3.1% | 0.775% | 0.26% |
| 21 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 9.7M | $1.71B | +4.5% | 0.747% | 0.31% |
| 22 | FRANKLIN RESOURCES INC | 9.4M | $1.66B | +1.0% | 0.723% | 0.36% |
| 23 | JENNISON ASSOCIATES LLC | 9.2M | $1.63B | -9.9% | 0.710% | 0.98% |
| 24 | Jupiter Topco LLC | 9.1M | $1.60B | — | 0.699% | 0.65% |
| 25 | Invesco Ltd. | 8.3M | $1.46B | -29.7% | 0.637% | 0.12% |
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 APH — a direct measure of their conviction.
Filings activity in APH during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new APH position in Q2 2026
Institutions that fully closed their APH position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 2,340 | +10% | 90.71% | +0.64 pp | $197.21B | +41% |
| Q1 2026 | 2,123 | +5.6% | 90.07% | +1.29 pp | $140.33B | 5.1% |
| Q4 2025 | 2,010 | +12% | 88.78% | +2.82 pp | $147.93B | +13% |
| Q3 2025 | 1,798 | +11% | 85.96% | 1.04 pp | $131.17B | +26% |
| Q2 2025 | 1,621 | +17% | 87.00% | 14.43 pp | $104.44B | +29% |
| Q1 2025 | 1,391 | +2.4% | 101.43% | +16.63 pp | $80.89B | +13% |
| Q4 2024 | 1,359 | +8.3% | 84.80% | +3.95 pp | $71.60B | +10% |
| Q3 2024 | 1,255 | — | 80.85% | — | $64.95B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying APH stock.
Based on Q2 2026 13F filings, institutional ownership of Amphenol Corporation stands at 90.7%, held across 2,340 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of APH, with approximately 101,252,038 shares worth $17.85B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of APH.
Our composite Smart Money Score for APH is 57 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
335 institutions opened new positions in APH during Q2 2026, while 137 fully exited. 1,757 added to existing positions and 176 trimmed.
APH institutional ownership rose by 0.64 percentage points quarter-over-quarter, with a net change of +217 holders.
The top 10 institutions account for 45.5% of all reported 13F value in APH, and the top 25 account for 62.0%.
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.
Amphenol Corporation (APH) Institutional Ownership