Northern Technologies International CORP Schedule 13G passive stakes

Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.

NASDAQ
Needham Investment Management L.L.C. and associated entities have reported an 8.1% beneficial ownership stake in Northern Technologies International Corp.
NASDAQ
Needham Investment Management and related entities have reported a 6.8% beneficial ownership stake in Northern Technologies International Corp. as of September 30, 2025.
NASDAQ
The Vanguard Group has filed an amended Schedule 13G, reporting a 4.55% passive beneficial ownership stake in Northern Technologies International Corp.