Question 1

Does William Blair Investment Management own NBIS stock?

Accepted Answer

No. William Blair Investment Management exited its NBIS (Nebius Group) position in Q4 2025. Its Q3 2025 13F listed 249,125 shares worth $28M.

Question 2

How many shares of NBIS does William Blair Investment Management own?

Accepted Answer

None since Q4 2025, when William Blair Investment Management exited the position. Its Q3 2025 13F listed 249,125 shares worth $28M.

Question 3

What is William Blair Investment Management's NBIS position worth?

Accepted Answer

William Blair Investment Management's NBIS position was worth $28M in its Q3 2025 13F, before the exit in Q4 2025.

Question 4

Is William Blair Investment Management buying or selling NBIS?

Accepted Answer

In Q4 2025, William Blair Investment Management exited its entire NBIS position.

Question 5

When did William Blair Investment Management first buy NBIS?

Accepted Answer

William Blair Investment Management already held NBIS in its Q4 2018 13F, the earliest on record, and listed it in 14 quarterly 13F filings.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2025-Q4 Latest	Exited	0	-100.0%	$0	0.0%	$85.17	0
2025-Q3	New	249,125	-	$28M	0.1%	$110.22	40
2022-Q1	Exited	0	-100.0%	$0	0.0%	—	0
2021-Q4	Increased	4.3M	+2.2%	$261.1M	0.7%	—	44
2021-Q3	Increased	4.2M	+2.1%	$336.6M	0.9%	—	45
2021-Q2	Increased	4.1M	+5.5%	$292.6M	0.9%	—	46
2021-Q1	Decreased	3.9M	-4.2%	$251.2M	0.8%	—	0
2020-Q4	Decreased	4.1M	-2.9%	$284.9M	0.9%	—	0
2020-Q3	Decreased	4.2M	-9.1%	$275M	1.1%	—	0
2020-Q2	Increased	4.6M	+8.2%	$231.9M	0.9%	—	47
2020-Q1	Increased	4.3M	+48.0%	$146M	0.7%	—	59
2019-Q4	Decreased	2.9M	-30.1%	$126M	0.5%	—	0
2019-Q3	Increased	4.1M	+6.2%	$145.2M	0.6%	—	45
2019-Q2	Increased	3.9M	+21.6%	$148.4M	0.6%	—	51
2019-Q1	Decreased	3.2M	-0.8%	$110.3M	0.5%	—	0
2018-Q4	First report	3.2M	-	$88.6M	0.4%	—	0

NBIS16 quarters

NBIS
16 quarters