CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK

884546

City

SAN FRANCISCO

State / Country

Stock

RBBN — Ribbon Communications Inc.

Top Portfolio Positions

3,278 positions · $569,970,550,912 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
NVDA	Nvidia Corp Technology	160,788,892	$28,041,582,764	4.92%
AAPL	Apple Inc. Technology	102,344,793	$25,974,085,015	4.56%
MSFT	Microsoft Corp Technology	52,519,324	$19,441,078,164	3.41%
AMZN	Amazon Com Inc Consumer Cyclical	66,597,967	$13,870,358,587	2.43%
GOOGL	Alphabet Inc. Communication Services	40,918,971	$11,766,659,300	2.06%
AVGO	Broadcom Inc. Technology	33,710,329	$10,433,683,927	1.83%
META	Meta Platforms, Inc. Communication Services	15,403,780	$8,812,964,650	1.55%
CVX	Chevron Corp Energy	36,118,480	$7,472,913,511	1.31%
TSLA	Tesla, Inc. Consumer Cyclical	19,943,635	$7,414,046,311	1.30%
MRK	Merck & Co., Inc. Healthcare	49,765,225	$5,986,258,914	1.05%

52 quarters · across all stocks

Compact Export CSV

25 of 25 shown

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,501,305	708,163	-7.9%	Shares	Sole	2026-05-15
2025-12-31	$2,214,933	769,074	-0.1%	Shares	Sole	2026-02-13
2025-09-30	$2,924,050	769,487	+0.4%	Shares	Sole	2025-11-10
2025-06-30	$3,072,453	766,198	+2.5%	Shares	Sole	2025-08-12
2025-03-31	$2,931,301	747,781	-1.7%	Shares	Sole	2025-09-15
2024-12-31	$3,164,790	760,767	-0.3%	Shares	Sole	2025-02-06
2024-09-30	$2,479,399	762,892	+1.9%	Shares	Sole	2024-11-12
2024-06-30	$2,463,907	748,908	+7.9%	Shares	Sole	2024-08-12
2024-03-31	$2,221,804	694,314	+0.6%	Shares	Sole	2024-05-09
2023-12-31	$2,001,762	690,263	+1.3%	Shares	Sole	2024-02-06
2023-09-30	$1,826,414	681,498	+3.3%	Shares	Sole	2023-11-08
2023-06-30	$1,840,071	659,524	+6.1%	Shares	Sole	2023-08-10
2023-03-31	$2,125,177	621,397	-3.4%	Shares	Sole	2023-05-12
2022-12-31	$1,795,130	643,416	+22.3%	Shares	Sole	2023-02-13
2022-09-30	$1,168,008	526,130	-29.8%	Shares	Sole	2022-11-14
2022-06-30	$2,277,321	749,119	-2.5%	Shares	Sole	2022-08-15
2022-03-31	$2,373,564	768,144	+4.8%	Shares	Sole	2022-05-13
2021-12-31	$4,435,678	733,170	+2.4%	Shares	Sole	2022-02-11
2021-09-30	$4,283,444	716,295	+0.5%	Shares	Sole	2021-11-16
2021-06-30	$5,423,920	712,736	+2.7%	Shares	Sole	2021-08-16
2021-03-31	$5,695,432	693,719	+4.5%	Shares	Sole	2021-05-17
2020-12-31	$4,356,692	664,130	-1.7%	Shares	Sole	2021-02-16
2020-09-30	$2,613,798	675,400	+20.5%	Shares	Sole	2020-11-13
2020-06-30	$2,202,670	560,476	+10.8%	Shares	Sole	2020-08-20
2020-03-31	$1,533,343	506,054	—	Shares	Sole	2020-05-15
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