Elefante Mark B’s Costco COST Stock Holding History

Elefante Mark B’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	$636K	Hold	638	–	–	0.35%	43
2025 Q4	$550K	Hold	638	–	–	0.34%	40
2025 Q3	$591K	Sell	638 -10	-2%	-$9.59K	0.38%	42
2025 Q2	$641K	Sell	648 -10	-2%	-$9.94K	0.48%	39
2025 Q1	$622K	Sell	658 -40	-6%	-$39K	0.49%	37
2024 Q4	$640K	Buy	+698	New	+$648K	0.58%	32
2020 Q2	$383K	Sell	1,260 -90	-7%	-$27.4K	1.29%	33
2020 Q1	$385K	Sell	1,350 -25	-2%	-$7.59K	1.68%	29
2019 Q4	$405K	Buy	1,375 +198	+17%	+$58.8K	1.47%	29
2019 Q3	$338K	Buy	1,177 +226	+24%	+$63.6K	1.33%	29
2019 Q2	$251K	Sell	951 -20	-2%	-$4.98K	0.97%	37
2019 Q1	$235K	Sell	971 -345	-26%	-$75.5K	1.02%	35
2018 Q4	$268K	Sell	1,316 -95	-7%	-$21.2K	1.28%	29
2018 Q3	$332K	Sell	1,411 -35	-2%	-$7.88K	1.33%	28
2018 Q2	$302K	Hold	1,446	–	–	1.44%	29
2018 Q1	$273K	Sell	1,446 -53	-4%	-$10K	1.37%	31
2017 Q4	$279K	Buy	+1,499	New	+$259K	1.33%	32

Other funds holding COST

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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 $147M AUM 25.76% 1-Year Est. Return

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

Elefante Mark B's COST Position: Q1 2026 in Review

Elefante Mark B held its Costco (COST) position steady in Q1 2026 at 638 shares worth $636K. The position accounts for 0.35% of the portfolio, ranked #43.

Elefante Mark B first reported a position in COST in Q4 2017 and has held it in 17 quarters since. The position peaked at $641K in Q2 2025. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

Elefante Mark B held 638 shares of Costco worth $636K as of Q1 2026.
Elefante Mark B left its Costco share count unchanged in Q1 2026.
Costco made up 0.35% of Elefante Mark B's portfolio in Q1 2026, its #43 holding.
Elefante Mark B first reported a position in Costco in Q4 2017 and has held it in 17 quarters since.
Elefante Mark B's Costco position peaked at $641K in Q2 2025.
4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Elefante Mark B's 13F filing for Q1 2026, filed 15 May 2026.