William Blair Investment Management, LLC: 13F Portfolio Moves Tracked
Quarter Ending 2026-03-31 During the quarter ending 2026-03-31, William Blair Investment Management, LLC made notable adjustments across its equity portfolio, with a clear tilt toward adding to existing positions rather than establishing new ones. The most significant new commitment was a fresh stake in Birkenstock Holding PLC (BIRK), valued at $92,276,654. Several holdings saw dramatic … Read more