Shell Asset Management Co reports 70.13% decrease in ownership of AMT / American Tower Corporation

美國鐵塔公司

US ˙ NYSE ˙ US03027X1000

Security	AMT / American Tower Corporation
Institution	Shell Asset Management Co
Latest Disclosed Ownership	5,555 shares
Latest Disclosed Value	$ 1,068

On November 7, 2025 - Shell Asset Management Co filed a 13F-HR form disclosing ownership of 5,555 shares of American Tower Corporation (US:AMT) valued at $1,068,338 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 23, 2025 disclosing 18,597 shares of American Tower Corporation. This represents a change in shares of -70.13% during the quarter. The current value of the position is $1,077,170 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2025-11-07	2025-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	5,555	-13,042	-70.13	1	-75.00	0.1073
2025-07-23	2025-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	18,597	4,838	35.16	4	100.00	0.1419
2025-05-14	2025-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	13,759	-5,450	-28.37	3	-33.33	0.1422
2025-02-14	2024-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	19,209	28	0.15	4	-25.00	0.1539
2024-11-07	2024-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	19,181	-1,263	-6.18	4	33.33	0.1964
2024-07-25	2024-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	20,444	-15,324	-42.84	4	-57.14	0.1809
2024-02-14	2023-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	35,768	566	1.61	8	40.00	0.3566
2023-11-08	2023-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	35,202	-22,079	-38.55	6	-54.55	0.2392
2023-07-28	2023-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	57,281	-16,853	-22.73	11	-26.67	0.4382
2023-05-15	2023-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	74,134	348	0.47	15	0.00	0.6287
2023-02-07	2022-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	73,786	-3,697	-4.77	16	-99.91	0.6847
2022-11-14	2022-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	77,483	-21,321	-21.58	16,636	-34.12	0.6484
2022-08-09	2022-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	98,804	23,669	31.50	25,253	33.79	0.7470
2022-05-04	2022-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	75,135	-27,631	-26.89	18,875	-37.21	0.4455
2022-02-09	2021-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	102,766	14,513	16.44	30,059	28.33	0.6167
2021-11-04	2021-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	88,253	15,458	21.23	23,423	19.11	0.5259
2021-08-12	2021-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	72,795	9,352	14.74	19,665	29.66	0.3812
2021-05-10	2021-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	63,443	12,106	23.58	15,167	31.62	0.3035
2021-02-16	2020-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	51,337	-2,288	-4.27	11,523	-11.11	0.2379
2020-11-13	2020-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	53,625	9,470	21.45	12,963	13.55	0.3014
2020-08-10	2020-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	44,155	5,425	14.01	11,416	35.37	0.2850
2020-05-11	2020-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	38,730	-2,619	-6.33	8,433	-11.26	0.2349
2020-02-13	2019-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	41,349	-4,443	-9.70	9,503	-6.15	0.2047
2019-11-12	2019-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	45,792	-3,998	-8.03	10,126	-0.53	0.2312
2019-08-12	2019-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	49,790	12,460	33.38	10,180	38.39	0.2253
2019-05-09	2019-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	37,330	111	0.30	7,356	24.93	0.1622
2019-02-13	2018-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	37,219	-2,539	-6.39	5,888	1.92	0.1468
2018-11-13	2018-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	39,758	-1,720	-4.15	5,777	-3.39	0.1140
2018-08-10	2018-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	41,478	5,908	16.61	5,980	15.67	0.1226
2018-05-14	2018-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	35,570	884	2.55	5,170	4.47	0.1029
2018-02-09	2017-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	34,686	6,735	24.10	4,949	29.55	0.0982
2017-10-20	2017-09-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	27,951	-4,967	-15.09	3,820	-12.30	0.0849
2017-10-18	2017-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	203,103	170,185		19,017
2017-07-26	2017-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	32,918	-127	-0.38	4,356	8.47	0.1081
2017-04-26	2017-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	33,045	1,800	5.76	4,016	21.62	0.1025
2017-01-10	2016-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	31,245	-89,081	-74.03	3,302	-75.79	0.0893
2016-10-28	2016-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	120,326	-22,536	-15.77	13,637	-15.98	0.3264
2016-07-25	2016-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	142,862	49,227	52.57	16,231	69.34	0.3765
2016-05-11	2016-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	93,635	-3,012	-3.12	9,585	2.29	0.2295
2016-02-05	2015-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	96,647	-106,456	-52.41	9,370	-50.73	0.2212
2015-10-13	2015-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	203,103	77,729	62.00	19,017	62.59	0.3014
2015-07-30	2015-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	125,374	-57,825	-31.56	11,696	-32.19	0.2340
2015-05-07	2015-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	183,199	183,199	46.12	17,248	47.47	0.3003
2015-02-04	2014-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	0	-203,103	-100.00	0	-100.00
2014-10-24	2014-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	203,103	-4,026	-1.94	19,017	2.04	0.2953
2014-08-08	2014-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	207,129	3,305	1.62	18,637	11.69	0.2872
2014-05-07	2014-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	203,824	5,176	2.61	16,687	5.24	0.2773
2014-02-03	2013-12-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	198,648	-28,332	-12.48	15,856	-5.76	0.2698
2014-01-27	2013-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	198,648			15,856
2013-10-28	2013-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	226,980	3,483	1.56	16,826	2.89	0.3091
2013-08-01	2013-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	223,497	223,497		16,353		0.3113

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.