A. O. Smith Corporation
US ˙ NYSE ˙ US8318652091

SecurityAOS / A. O. Smith Corporation
InstitutionRobeco Schweiz AG
Latest Disclosed Ownership269,170 shares
Latest Disclosed Value $ 17,749,070
Robeco Schweiz AG reports 0.11% decrease in ownership of AOS / A. O. Smith Corporation

On May 7, 2026 - Robeco Schweiz AG filed a 13F-HR form disclosing ownership of 269,170 shares of A. O. Smith Corporation (US:AOS) valued at $17,749,070 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 269,470 shares of A. O. Smith Corporation. This represents a change in shares of -0.11% during the quarter. The current value of the position is $15,345,382 USD.

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)
2026-05-07 2026-03-31 13F SMITH A O COM 831865209 269,170 -300 -0.11 17,749 -1.51 0.3754
2026-02-03 2025-12-31 13F SMITH A O COM 831865209 269,470 -24,000 -8.18 18,022 -16.34 0.4038
2025-10-27 2025-09-30 13F SMITH A O COM 831865209 293,470 -167 -0.06 21,544 11.89 0.4843
2025-08-07 2025-06-30 13F SMITH A O COM 831865209 293,637 -23,000 -7.26 19,254 -6.97 0.4443
2025-04-30 2025-03-31 13F SMITH A O COM 831865209 316,637 -10,326 -3.16 20,695 -7.21 0.5091
2025-02-05 2024-12-31 13F SMITH A O COM 831865209 326,963 0 0.00 22,302 -24.07 0.4765
2024-11-04 2024-09-30 13F SMITH A O COM 831865209 326,963 -583,584 -64.09 29,371 -60.56 0.5503
2024-08-08 2024-06-30 13F SMITH A O COM 831865209 910,547 -39,266 -4.13 74,465 -12.36 1.4300
2024-04-25 2024-03-31 13F SMITH A O COM 831865209 949,813 -65,418 -6.44 84,970 1.52 1.4828
2024-02-14 2023-12-31 13F SMITH A O COM 831865209 1,015,231 -114,000 -10.10 83,696 12.08 1.4060
2023-11-08 2023-09-30 13F SMITH A O COM 831865209 1,129,231 -115,153 -9.25 74,676 -17.55 1.2624
2023-08-14 2023-06-30 13F SMITH A O COM 831865209 1,244,384 -173,950 -12.26 90,566 -7.66 1.3491
2023-05-08 2023-03-31 13F SMITH A O COM 831865209 1,418,334 -350,566 -19.82 98,078 -3.13 1.5848
2023-02-07 2022-12-31 13F SMITH A O COM 831865209 1,768,900 -130,192 -6.86 101,252 9.75 1.8495
2022-11-10 2022-09-30 13F SMITH A O COM 831865209 1,899,092 -577,308 -23.31 92,258 1.7940
2022-08-03 2022-06-30 13F SMITH A O COM 831865209 2,476,400 180,354 7.85 0 -100.00
2022-05-13 2022-03-31 13F SMITH A O COM 831865209 2,296,046 329,539 16.76 146,694 -13.11 2.0669
2022-02-08 2021-12-31 13F SMITH A O COM 831865209 1,966,507 230,307 13.27 168,825 59.22 2.1883
2021-10-13 2021-09-30 13F SMITH A O COM 831865209 1,736,200 1,107,200 176.03 106,030 133.93 1.2366
2021-07-15 2021-06-30 13F SMITH A O COM 831865209 629,000 223,600 55.16 45,326 65.37 0.6314
2021-05-04 2021-03-31 13F SMITH A O COM 831865209 405,400 113,700 38.98 27,409 71.40 0.4187
2021-02-16 2020-12-31 13F SMITH A O COM 831865209 291,700 55,987 23.75 15,991 28.48 0.3427
2020-10-13 2020-09-30 13F SMITH A O COM 831865209 235,713 -90,476 -27.74 12,446 709.76 0.3687
2020-07-07 2020-06-30 13F SMITH A O COM 831865209 326,189 55,961 20.71 1,537 -85.27 0.0552
2020-04-10 2020-03-31 13F SMITH A O COM 831865209 270,228 -14,372 -5.05 10,431 -22.95 0.4468
2020-02-19 2019-12-31 13F/A-1 SMITH A O COM 831865209 284,600 -107,400 -27.40 13,538 -27.54 0.5047
2020-02-13 2019-12-31 13F SMITH A O COM 831865209 284,600 -107,400 48 275,687.7836
2019-10-18 2019-09-30 13F SMITH A O COM 831865209 392,000 -759,900 -65.97 18,683 -64.80 0.8023
2019-07-31 2019-06-30 13F SMITH A O COM 831865209 1,151,900 544,400 89.61 53,080 63.87 2.2506
2019-05-14 2019-03-31 13F SMITH A O COM 831865209 607,500 -262,084 -30.14 32,392 -12.76 1.3398
2019-02-01 2018-12-31 13F SMITH A O COM 831865209 869,584 460,721 112.68 37,131 67.87 1.7173
2018-10-30 2018-09-30 13F SMITH A O COM 831865209 408,863 103,166 33.75 22,119 23.60 0.8630
2018-08-09 2018-06-30 13F SMITH A O COM 831865209 305,697 -28,375 -8.49 17,896 -15.76 0.7629
2018-05-16 2018-03-31 13F SMITH A O COM 831865209 334,072 -94,139 -21.98 21,244 -19.48 0.9841
2018-02-14 2017-12-31 13F SMITH A O COM 831865209 428,211 -7,382 -1.69 26,382 2.83 1.7417
2017-11-09 2017-09-30 13F SMITH A O COM 831865209 435,593 -28,181 -6.08 25,656 -1.13 1.9781
2017-08-15 2017-06-30 13F SMITH A O COM 831865209 463,774 37,996 8.92 25,948 19.17 2.1761
2017-05-10 2017-03-31 13F SMITH A O COM 831865209 425,778 -41,975 -8.97 21,774 -2.33 1.8566
2017-01-10 2016-12-31 13F/A-1 SMITH A O COM 831865209 467,753 126,158 36.93 22,293 -33.35 2.0509
2017-01-09 2016-12-31 13F SMITH A O COM 831865209 467,753 22,293
2016-11-15 2016-09-30 13F SMITH A O COM 831865209 341,595 -6,757 -1.94 33,446 12.16 2.9012
2016-08-12 2016-06-30 13F SMITH A O COM 831865209 348,352 -122,645 -26.04 29,819 -17.16 2.7331
2016-05-18 2016-03-31 13F SMITH A O COM 831865209 470,997 143,971 44.02 35,994 41.05 3.4554
2016-02-16 2015-12-31 13F SMITH A O COM 831865209 327,026 -37,444 -10.27 25,518 9.59 2.1860
2015-10-27 2015-09-30 13F SMITH A O COM 831865209 364,470 -83,946 -18.72 23,286 -27.45 2.1727
2015-08-24 2015-06-30 13F SMITH A O COM 831865209 448,416 -45,668 -9.24 32,098 -1.21 2.6624
2015-04-20 2015-03-31 13F SMITH A O COM 831865209 494,084 494,084 0.00 32,491 2.5511
2015-01-26 2014-12-31 13F SMITH A O COM 831865209 0 -503,775 -100.00 0 -100.00
2014-10-22 2014-09-30 13F SMITH A O COM 831865209 503,775 306,823 155.79 24,206 148.90 1.9340
2014-08-08 2014-06-30 13F SMITH A O COM 831865209 196,952 74,952 61.44 9,725 73.69 0.7925
2014-05-05 2014-03-31 13F SMITH A O COM 831865209 122,000 -22,770 -15.73 5,599 -13.82 0.4855
2013-11-12 2013-09-30 13F SMITH A O COM 831865209 144,770 0 0.00 6,497 20.61 0.5444
2013-08-01 2013-06-30 13F SMITH A O COM 831865209 144,770 144,770 5,387 0.4839
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.