Biogen Inc. historical data

Date	Open	High	Low	Close	Adj. close	Volume
2026-10-16	235.75	236.87	232.36	232.65	232.65	1,462,600
2026-10-15	236.46	240.99	235.22	235.35	235.35	1,572,400
2026-10-14	228.99	234.20	228.00	232.83	232.83	1,947,100
2026-10-13	230.34	231.04	226.71	228.90	228.90	1,049,100
2026-10-12	233.98	238.24	229.00	229.41	229.41	1,461,700
2026-10-09	220.62	227.20	219.23	225.71	225.71	815,000
2026-10-08	220.15	223.09	215.73	218.43	218.43	1,339,000
2026-10-07	222.93	228.00	221.40	222.15	222.15	1,298,100
2026-10-06	224.53	225.97	218.00	222.89	222.89	1,008,100
2026-10-05	219.90	223.85	218.22	223.59	223.59	951,300
2026-10-02	222.98	224.08	219.81	219.88	219.88	779,900
2026-10-01	225.50	228.31	222.50	222.82	222.82	1,755,300
2026-09-30	227.23	229.36	225.51	225.88	225.88	1,553,300
2026-09-29	227.02	229.41	224.45	227.07	227.07	1,161,200
2026-09-28	225.87	230.49	225.51	228.69	228.69	1,332,300
2026-09-25	228.27	228.92	223.76	227.60	227.60	958,000
2026-09-24	226.80	228.72	224.31	226.36	226.36	1,034,600
2026-09-23	226.94	229.19	222.36	227.53	227.53	1,494,300
2026-09-22	219.22	226.43	219.00	225.36	225.36	1,111,700
2026-09-21	216.14	221.92	214.59	219.07	219.07	928,500
2026-09-18	219.05	220.17	215.26	215.50	215.50	2,634,700

Page 1 of 1 · 21 trading days

Stock splits

Date	Split (new : old)
2001-01-18	3:1
1999-12-21	2:1

No dividends on record.

Open, high, low and close are as traded (USD). Adjusted close accounts for splits and dividends. Educational only, not financial advice.