William Blair Small Cap Growth Fund Class I (WBSIX) NASDAQ

Currency In USD

WBSIX Historical Return

If you invested $1000 in William Blair Small Cap Growth Fund Class I (WBSIX) 10 years ago, it would be worth $2,642.02 as of June 23, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $970.9, while $1000 invested 1 year ago would be worth $1,326.22. This corresponds to total returns of 164.2%, -2.91%, 32.62%, respectively, with annualized returns of 10.2%, -0.59%, 32.62%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

WBSIX Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low
June 22, 2026	40.37	40.37	40.37	40.37	40.37
June 18, 2026	39.28	39.28	39.28	39.28	39.28
June 17, 2026	39.28	39.28	39.28	39.28	39.28
June 16, 2026	39.75	39.75	39.75	39.75	39.75
June 15, 2026	39.82	39.82	39.82	39.82	39.82
June 12, 2026	39.41	39.41	39.41	39.41	39.41
June 11, 2026	39.2	39.2	39.2	39.2	39.2
June 10, 2026	37.99	37.99	37.99	37.99	37.99
June 09, 2026	38.73	38.73	38.73	38.73	38.73
June 08, 2026	38.44	38.44	38.44	38.44	38.44
June 05, 2026	38.19	38.19	38.19	38.19	38.19
June 04, 2026	39.54	39.54	39.54	39.54	39.54
June 03, 2026	39.18	39.18	39.18	39.18	39.18
June 02, 2026	38.79	38.79	38.79	38.79	38.79
June 01, 2026	38.79	38.79	38.79	38.79	38.79
May 29, 2026	38.8	38.8	38.8	38.8	38.8
May 28, 2026	38.61	38.61	38.61	38.61	38.61
May 27, 2026	38.61	38.61	38.61	38.61	38.61
May 26, 2026	38.84	38.84	38.84	38.84	38.84
May 22, 2026	38.04	38.04	38.04	38.04	38.04
May 21, 2026	37.35	37.35	37.35	37.35	37.35
May 20, 2026	37.35	37.35	37.35	37.35	37.35
May 19, 2026	36.31	36.31	36.31	36.31	36.31
May 18, 2026	36.73	36.73	36.73	36.73	36.73
May 15, 2026	37.04	37.04	37.04	37.04	37.04
May 14, 2026	37.92	37.92	37.92	37.92	37.92
May 13, 2026	37.67	37.67	37.67	37.67	37.67
May 12, 2026	37.74	37.74	37.74	37.74	37.74
May 11, 2026	37.92	37.92	37.92	37.92	37.92
May 08, 2026	37.93	37.93	37.93	37.93	37.93
May 07, 2026	38.11	38.11	38.11	38.11	38.11
May 06, 2026	37.68	37.68	37.68	37.68	37.68
May 05, 2026	37.25	37.25	37.25	37.25	37.25
May 04, 2026	37.25	37.25	37.25	37.25	37.25
May 01, 2026	37.5	37.5	37.5	37.5	37.5
April 30, 2026	36.46	36.46	36.46	36.46	36.46
April 29, 2026	36.46	36.46	36.46	36.46	36.46
April 28, 2026	36.67	36.67	36.67	36.67	36.67
April 27, 2026	37.53	37.53	37.53	37.53	37.53
April 24, 2026	37.53	37.53	37.53	37.53	37.53
April 23, 2026	37.15	37.15	37.15	37.15	37.15
April 22, 2026	37.39	37.39	37.39	37.39	37.39
April 21, 2026	37.04	37.04	37.04	37.04	37.04
April 20, 2026	37.41	37.41	37.41	37.41	37.41
April 17, 2026	37.19	37.19	37.19	37.19	37.19
April 16, 2026	36.2	36.2	36.2	36.2	36.2
April 15, 2026	36.19	36.19	36.19	36.19	36.19
April 14, 2026	35.78	35.78	35.78	35.78	35.78
April 13, 2026	35.78	35.78	35.78	35.78	35.78
April 10, 2026	35.13	35.13	35.13	35.13	35.13
April 09, 2026	35.34	35.34	35.34	35.34	35.34
April 08, 2026	33.91	33.91	33.91	33.91	33.91
April 07, 2026	33.91	33.91	33.91	33.91	33.91
April 06, 2026	33.94	33.94	33.94	33.94	33.94
April 02, 2026	33.75	33.75	33.75	33.75	33.75
April 01, 2026	33.57	33.57	33.57	33.57	33.57
March 31, 2026	32.09	32.09	33.28	32.09	32.09
March 30, 2026	32.09	32.09	32.09	32.09	32.09
March 27, 2026	33.06	33.06	32.5	33.06	33.06
March 26, 2026	33.06	33.06	33.06	33.06	33.06