AAON, Inc.
MX ˙ BMV ˙ US0003602069
SecurityMX:AAON / AAON, Inc.
InstitutionWellington Management Group Llp
Latest Disclosed Ownership7,977,164 shares
Ownership 9.80%
Wellington Management Group Llp ownership in AAON / AAON, Inc.

2026-05-15 - Wellington Management Group Llp has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 7,977,164 shares of AAON, Inc. (MX:AAON). This represents 9.8 percent ownership of the company. In their previous filing dated 2026-05-07 , Wellington Management Group Llp had reported owning 8,184,277 shares, indicating a decrease of -2.53 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-05-15 2026-05-15 13G/A 8,184,277 7,977,164 -2.53 9.80 -2.00
2026-05-07 2026-05-07 13G/A 6,839,277 8,184,277 19.67 10.00 19.05
2026-02-10 2026-02-10 13G/A 4,739,892 6,839,277 44.29 8.40 44.83
2025-11-12 2025-11-12 13G 4,739,892 5.80

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AAON COM PAR $0.004 000360206 7,977,164 1,137,887 16.64 660,110 26.58 0.0175
2026-02-17 2025-12-31 13F AAON COM PAR $0.004 000360206 6,839,277 2,099,385 44.29 521,495 17.75 0.0914
2025-11-14 2025-09-30 13F AAON COM PAR $0.004 000360206 4,739,892 3,966,088 512.54 442,896 676.08 0.0775
2025-08-14 2025-06-30 13F AAON COM PAR $0.004 000360206 773,804 707,708 1,070.73 57,068 1,005.11 0.0104
2025-05-13 2025-03-31 13F AAON COM PAR $0.004 000360206 66,096 -4,517 -6.40 5,164 -37.85 0.0010
2025-02-12 2024-12-31 13F AAON COM PAR $0.004 000360206 70,613 70,613 8,310 0.0015
2023-02-13 2022-12-31 13F AAON COM PAR $0.004 000360206 0 -6,716 -100.00 0 -100.00
2022-11-14 2022-09-30 13F AAON COM PAR $0.004 000360206 6,716 6,716 362 0.0001
2021-11-15 2021-09-30 13F AAON COM PAR $0.004 000360206 0 -8,198 -100.00 0 -100.00
2021-08-16 2021-06-30 13F AAON COM PAR $0.004 000360206 8,198 8,198 513 0.0001
2018-08-14 2018-06-30 13F AAON COM PAR $0.004 000360206 0 -778,503 -100.00 0 -100.00
2018-05-15 2018-03-31 13F AAON COM PAR $0.004 000360206 778,503 -6,334 -0.81 30,362 5.41 0.0069
2018-02-13 2017-12-31 13F AAON COM PAR $0.004 000360206 784,837 2,824 0.36 28,804 6.84 0.0064
2017-11-13 2017-09-30 13F AAON COM PAR $0.004 000360206 782,013 -2,573 -0.33 26,960 -6.75 0.0062
2017-08-14 2017-06-30 13F AAON COM PAR $0.004 000360206 784,586 -67,408 -7.91 28,912 -4.00 0.0068
2017-05-11 2017-03-31 13F AAON COM PAR $0.004 000360206 851,994 -9,422 -1.09 30,118 5.79 0.0073
2017-02-14 2016-12-31 13F AAON COM PAR $0.004 000360206 861,416 52,340 6.47 28,470 22.09 0.0071
2016-11-14 2016-09-30 13F AAON COM PAR $0.004 000360206 809,076 11,645 1.46 23,318 6.30 0.0058
2016-08-15 2016-06-30 13F AAON COM PAR $0.004 000360206 797,431 16,172 2.07 21,937 0.28 0.0057
2016-05-13 2016-03-31 13F AAON COM PAR $0.004 000360206 781,259 30,812 4.11 21,875 25.54 0.0058
2016-02-12 2015-12-31 13F AAON COM PAR $0.004 000360206 750,447 29,472 4.09 17,425 24.71 0.0046
2015-11-16 2015-09-30 13F AAON COM PAR $0.004 000360206 720,975 4,927 0.69 13,972 -13.35 0.0039
2015-08-14 2015-06-30 13F AAON COM PAR $0.004 000360206 716,048 -65,175 -8.34 16,125 -15.85 0.0042
2015-05-15 2015-03-31 13F AAON COM PAR $0.004 000360206 781,223 75,300 10.67 19,163 21.24 0.0049
2015-02-13 2014-12-31 13F AAON COM PAR $0.004 000360206 705,923 89,848 14.58 15,806 50.82 0.0042
2014-11-14 2014-09-30 13F AAON COM PAR $0.004 000360206 616,075 144,545 30.65 10,480 -33.70 0.0029
2014-08-14 2014-06-30 13F AAON COM PAR $0.004 000360206 471,530 53,298 12.74 15,806 35.60 0.0043
2014-05-15 2014-03-31 13F AAONINC COMPAR$0.004 000360206 418,232 49,588 13.45 11,656 -1.04 0.0032
2014-02-14 2013-12-31 13F AAON COM PAR $0.004 000360206 368,644 37,704 11.39 11,778 33.99 0.0034
2013-11-14 2013-09-30 13F AAON COM PAR $0.004 000360206 330,940 187,779 131.17 8,790 85.60 0.0028
2013-08-14 2013-06-30 13F AAON COM PAR $0.004 000360206 143,161 143,161 4,736 0.0015
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.