BlackRock’s Costco COST Stock Holding History

BlackRock’s Portfolio COST Stock Details COST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$34.8B	Sell	34,947,040 -152,481	-0.4%	-$149M	0.61%	19
2025 Q4	$30.3B	Buy	35,099,521 +317,592	+0.9%	+$288M	0.51%	23
2025 Q3	$32.2B	Sell	34,781,929 -801,895	-2%	-$769M	0.56%	23
2025 Q2	$35.2B	Buy	35,583,824 +651,656	+2%	+$648M	0.67%	17
2025 Q1	$33B	Buy	34,932,168 +170,677	+0.5%	+$166M	0.69%	19
2024 Q4	$31.9B	Buy	34,761,491 +1,205,914	+4%	+$1.12B	0.64%	18
2024 Q3	$29.7B	Buy	33,555,577 +368,981	+1%	+$320M	0.62%	19
2024 Q2	$28.2B	Buy	33,186,596 +835,171	+3%	+$652M	0.64%	19
2024 Q1	$23.7B	Buy	32,351,425 +1,739,439	+6%	+$1.24B	0.55%	23
2023 Q4	$20.2B	Buy	30,611,986 +594,814	+2%	+$353M	0.52%	24
2023 Q3	$17B	Sell	30,017,172 -532,042	-2%	-$294M	0.49%	27
2023 Q2	$16.4B	Sell	30,549,214 -490,223	-2%	-$248M	0.45%	28
2023 Q1	$15.4B	Buy	31,039,437 +1,071,456	+4%	+$525M	0.45%	29
2022 Q4	$13.7B	Sell	29,967,981 -91,643	-0.3%	-$44.8M	0.43%	33
2022 Q3	$14.2B	Sell	30,059,624 -942,850	-3%	-$490M	0.48%	28
2022 Q2	$14.9B	Sell	31,002,474 -337,820	-1%	-$171M	0.48%	30
2022 Q1	$18B	Buy	31,340,294 +261,972	+0.8%	+$137M	0.49%	25
2021 Q4	$17.6B	Buy	31,078,322 +944,199	+3%	+$484M	0.45%	28
2021 Q3	$13.5B	Buy	30,134,123 +178,344	+0.6%	+$78.4M	0.38%	44
2021 Q2	$11.9B	Buy	29,955,779 +229,495	+0.8%	+$86.8M	0.33%	49
2021 Q1	$10.5B	Buy	29,726,284 +1,042,052	+4%	+$363M	0.31%	54
2020 Q4	$10.8B	Sell	28,684,232 -750,979	-3%	-$281M	0.34%	50
2020 Q3	$10.4B	Sell	29,435,211 -828,023	-3%	-$278M	0.39%	44
2020 Q2	$9.18B	Buy	30,263,234 +2,265,682	+8%	+$689M	0.37%	48
2020 Q1	$7.98B	Sell	27,997,552 -711,011	-2%	-$216M	0.39%	44
2019 Q4	$8.44B	Buy	28,708,563 +464,381	+2%	+$138M	0.32%	52
2019 Q3	$8.14B	Buy	28,244,182 +834,024	+3%	+$235M	0.34%	47
2019 Q2	$7.24B	Sell	27,410,158 -67,265	-0.2%	-$16.8M	0.31%	55
2019 Q1	$6.65B	Sell	27,477,423 -1,300,732	-5%	-$285M	0.3%	62
2018 Q4	$5.86B	Buy	28,778,155 +736,711	+3%	+$165M	0.3%	62
2018 Q3	$6.59B	Buy	28,041,444 +919,651	+3%	+$207M	0.29%	60
2018 Q2	$5.67B	Buy	27,121,793 +858,755	+3%	+$170M	0.26%	66
2018 Q1	$4.95B	Sell	26,263,038 -125,823	-0.5%	-$23.7M	0.24%	73
2017 Q4	$4.91B	Sell	26,388,861 -1,172,044	-4%	-$202M	0.23%	77
2017 Q3	$4.53B	Buy	27,560,905 +2,655,649	+11%	+$417M	0.23%	77
2017 Q2	$3.98B	Buy	24,905,256 +703,825	+3%	+$121M	0.21%	85
2017 Q1	$4.06B	Buy	24,201,431 +23,278,398	+2,522%	+$3.9B	0.22%	79
2016 Q4	$148M	Sell	923,033 -39,136	-4%	-$5.97M	0.21%	98
2016 Q3	$147M	Sell	962,169 -87,303	-8%	-$14.1M	0.21%	96
2016 Q2	$165M	Buy	1,049,472 +182,743	+21%	+$27.7M	0.25%	78
2016 Q1	$137M	Sell	866,729 -176,705	-17%	-$26.8M	0.22%	92
2015 Q4	$169M	Sell	1,043,434 -123,669	-11%	-$19.5M	0.25%	80
2015 Q3	$169M	Buy	1,167,103 +38,091	+3%	+$5.44M	0.26%	77
2015 Q2	$152M	Sell	1,129,012 -111,205	-9%	-$16M	0.23%	93
2015 Q1	$188M	Buy	1,240,217 +28,850	+2%	+$4.23M	0.26%	79
2014 Q4	$172M	Buy	1,211,367 +121,496	+11%	+$16.5M	0.25%	86
2014 Q3	$137M	Sell	1,089,871 -159,215	-13%	-$19.2M	0.2%	107
2014 Q2	$144M	Buy	1,249,086 +242,256	+24%	+$27.8M	0.21%	110
2014 Q1	$112M	Buy	1,006,830 +31,796	+3%	+$3.64M	0.18%	121
2013 Q4	$116M	Buy	975,034 +13,781	+1%	+$1.65M	0.19%	115
2013 Q3	$111M	Sell	961,253 -109,069	-10%	-$12.6M	0.21%	107
2013 Q2	$118M	Buy	+1,070,322	New	+$117M	0.23%	89

Other funds holding COST

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

DAM

Diamant Asset Management Ridgefield, Connecticut $137B AUM 18.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

BlackRock's COST Position: Q1 2026 in Review

BlackRock reduced its Costco (COST) stake by 0.43% in Q1 2026, selling an estimated $149M and leaving 34,947,040 shares worth $34.8B. The position accounts for 0.61% of the portfolio, ranked #19.

BlackRock first reported a position in COST in Q2 2013 and has held it in 52 quarters since. The position peaked at $35.2B in Q2 2025. 4,238 funds tracked by Wall St. Rank hold COST as of Q1 2026.

BlackRock held 34,947,040 shares of Costco worth $34.8B as of Q1 2026.
BlackRock sold 152,481 Costco shares in Q1 2026, an estimated $149M.
Costco made up 0.61% of BlackRock's portfolio in Q1 2026, its #19 holding.
BlackRock first reported a position in Costco in Q2 2013 and has held it in 52 quarters since.
BlackRock's Costco position peaked at $35.2B in Q2 2025.
4,238 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.