Who owns Plexus (PLXS)?
121 holders named in SEC filings declare between 77.6% and 98.1% of Plexus' shares outstanding, as of Sep 16, 2026. The largest are BlackRock (16.4%), Vanguard (13.3%) and DISCIPLINED GROWTH INVESTORS INC /MN (5.4%); the five largest hold 43.6% together. Another 328 institutions hold small positions worth 3.4%. From Mar 31, 2026 to Jun 30, 2026, institutions that filed both quarters bought 10.1% and sold 10.6% of the shares, a net sale of 0.49%; 93 opened a position, 135 added, 133 reduced and 35 sold out. Biggest buyers: T. Rowe Price (+537,010 shares) and JPMorgan (+293,812 shares). Biggest sellers: American Century Companies, Inc. (-378,214) and Dimensional (-286,529). Schedule 13D/G filings since Mar 31, 2026: American Century Investment Management, Inc. fell below 5% (4.4% still declared) on Jun 30, 2026. Directors and officers, from their latest Form 4: Dean A. Foate (0.43%). Over time, 434 managers declared Plexus in their 13F for Q2 2026, against 201 for Q4 2019: together at most 99.9% of the shares outstanding, against 95.9%.
| Holder | Filing | Share of capital | As of | Holding since (13F) |
|---|---|---|---|---|
| BlackRock | 13F | 16.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Vanguard | 13F | 13.3% | Jun 30, 2026 | Q4 2019 or earlier |
| DISCIPLINED GROWTH INVESTORS INC /MN | 13F | 5.4% | Jun 30, 2026 | Q4 2019 or earlier |
| American Century Companies, Inc. | 13F | 4.4% | Jun 30, 2026 | Q4 2019 or earlier |
| State Street | 13F | 4.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Dimensional | 13F | 3.1% | Jun 30, 2026 | Q4 2019 or earlier |
| Geode Capital | 13F | 3.0% | Jun 30, 2026 | Q4 2019 or earlier |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 13F | 2.9% | Jun 30, 2026 | Q4 2019 or earlier |
| Fuller & Thaler Asset Management, Inc. | 13F | 2.7% | Jun 30, 2026 | Q4 2024 |
| T. Rowe Price | 13F | 2.6% | Jun 30, 2026 | Q4 2019 or earlier |
| EARNEST PARTNERS LLC | 13F | 2.4% | Jun 30, 2026 | Q2 2020 |
| ALLIANCEBERNSTEIN L.P. | 13F | 2.1% | Jun 30, 2026 | Q4 2019 or earlier |
| JPMorgan | 13F | 1.7% | Jun 30, 2026 | Q4 2019 or earlier |
| Charles Schwab | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Nuveen | 13F | 1.4% | Jun 30, 2026 | Q4 2019 or earlier |
| Morgan Stanley | 13F | 1.3% | Jun 30, 2026 | Q4 2019 or earlier |
| Northern Trust | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 13F | 1.2% | Jun 30, 2026 | Q3 2023 |
| Victory Capital Management, Inc. | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Invesco | 13F | 1.2% | Jun 30, 2026 | Q4 2019 or earlier |
| Thrivent Financial for Lutherans | 13F | 1.1% | Jun 30, 2026 | Q4 2019 or earlier |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 13F | 1.0% | Jun 30, 2026 | Q4 2019 or earlier |
| Cartenna Capital, LP | 13F | 0.99% | Jun 30, 2026 | Q1 2026 |
| BROWN ADVISORY INC | 13F | 0.87% | Jun 30, 2026 | Q2 2026 |
| Goldman Sachs | 13F | 0.85% | Jun 30, 2026 | Q4 2019 or earlier |
Plexus institutional ownership over time
| Quarter | 13F managers | Share of the company (upper bound) | Value declared | Held by stock pickers |
|---|---|---|---|---|
| Q4 2019 | 201 | 95.9% | $2.2B | 58.3% |
| Q4 2020 | 215 | 93.6% | $2.1B | 58.6% |
| Q4 2021 | 222 | 95.0% | $2.5B | 57.7% |
| Q4 2022 | 249 | 95.8% | $2.7B | 56.5% |
| Q4 2023 | 236 | 94.8% | $2.8B | 53.7% |
| Q4 2024 | 310 | 96.6% | $4.1B | 50.1% |
| Q4 2025 | 331 | 99.4% | $3.9B | 54.4% |
| Q2 2026 | 434 | 99.9% | $8.0B | 54.5% |
From SEC Form 13F, every quarter since the end of 2019, read like the current quarter: entities of a house summed, a value contradicting its share count set aside. The share of the company is an upper bound — two managers can declare the same shares — over the shares outstanding at that date.