Aaon, Inc. (Nasdaq: AAON), an SEC filer in Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip, closed at $75.87, -2.9%, on 2026-08-28, with a market cap of $6.4B as of 2026-08-27, a trailing P/E of 60.6, a net margin of 7.5% and 3-year sales growth of 17.5%. Institutional ownership, earnings history and filed financials are on the tabs below.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | WELLINGTON MANAGEMENT GROUP LLP | 7,977,1648.0M | $660M | 9.79% | ADD 17% |
| 2 | BlackRock, Inc. | 6,560,4226.6M | $543M | 8.05% | ADD 3% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 3,099,1213.1M | $256M | 3.80% | NEW† |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2,908,0912.9M | $241M | 3.57% | NEW† |
| 5 | WASATCH ADVISORS LP | 2,268,1182.3M | $188M | 2.78% | ADD 24% |
| 6 | STATE STREET CORP | 2,062,6142.1M | $171M | 2.53% | — |
| 7 | FIRST TRUST ADVISORS LP | 2,013,2152.0M | $167M | 2.47% | ADD 22% |
| 8 | GENEVA CAPITAL MANAGEMENT LLC | 1,721,6311.7M | $142M | 2.11% | TRIM -7% |
| 9 | BLAIR WILLIAM & CO/IL | 1,622,2031.6M | $134M | 1.99% | TRIM -3% |
| 10 | Champlain Investment Partners, LLC | 1,602,0061.6M | $133M | 1.97% | TRIM -4% |
† NEW this big is usually a rename.
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +3,099,121 | $256M | OPEN |
| VANGUARD PORTFOLIO MANAGEMENT LLC | +2,908,091 | $241M | OPEN |
| WELLINGTON MANAGEMENT GROUP LLP | +1,137,887 | $94M | ADD |
| Capital World Investors | +683,504 | $57M | ADD |
| WASATCH ADVISORS LP | +436,704 | $36M | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −6,396,501 | $529M | CLOSE |
| Capital International Investors | −1,328,881 | $110M | CLOSE |
| NORGES BANK | −545,368 | $45M | CLOSE |
| FMR LLC | −534,844 | $44M | TRIM |
| Ceredex Value Advisors LLC | −529,750 | $44M | CLOSE |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP | 71K | 66K | 774K | 4.7M | 6.8M | 8.0M | $660M |
| BlackRock, Inc. | 7.1M | 6.4M | 6.4M | 6.4M | 6.4M | 6.6M | $543M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 3.1M | $256M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | — | — | — | — | — | 2.9M | $241M |
| WASATCH ADVISORS LP | 1.6M | 1.8M | 1.7M | 2.1M | 1.8M | 2.3M | $188M |
| STATE STREET CORP | 2.1M | 2.1M | 2.0M | 2.0M | 2.0M | 2.1M | $171M |
| FIRST TRUST ADVISORS LP | 1.1M | 903K | 818K | 1.9M | 1.6M | 2.0M | $167M |
| GENEVA CAPITAL MANAGEMENT LLC | 1.7M | 1.9M | 2.0M | 2.0M | 1.8M | 1.7M | $142M |
| BLAIR WILLIAM & CO/IL | 1.2M | 2.2M | 2.3M | 1.8M | 1.7M | 1.6M | $134M |
| Champlain Investment Partners, LLC | — | — | 1.2M | 2.3M | 1.7M | 1.6M | $133M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Breaks = no 13F that quarter.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
SEC Schedule 13D/G XML · group aggregate.
