Biogen (BIIB) — What Changed

Material changes in the AI committee's view · 27 events tracked · Detected nightly

← Overview📈 Rating History💰 Earnings📰 Recent Events🔄 What Changed📖 Thesis Evolution🔍 Similar Stocks
2026-08-01 MAJOR
▲ Agreement Shift

BIIB's Committee agreement moved from 50.00% to 66.70% (+16.70pp, 1 day(s) apart).

50.00 → 66.70 (+16.7)

2026-08-01 MINOR
▲ Score Change

BIIB's Committee score moved from 58.46 to 60.90 (+2.44, 1 day(s) apart).

58.46 → 60.90 (+2.4)

2026-08-01 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from contested to moderate (1 day(s) apart).

contested → moderate

2026-08-01 MAJOR
— Rating Change

BIIB moved from Watch to Buy (1 day(s) apart).

Watch → Buy

2026-07-31 MAJOR
▼ Agreement Shift

BIIB's Committee agreement moved from 66.70% to 50.00% (-16.70pp, 1 day(s) apart).

66.70 → 50.00 (-16.7)

2026-07-31 MINOR
▼ Score Change

BIIB's Committee score moved from 59.35 to 58.46 (-0.89, 1 day(s) apart).

59.35 → 58.46 (-0.9)

2026-07-31 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from moderate to contested (1 day(s) apart).

moderate → contested

2026-07-30 MINOR
▲ Score Change

BIIB's Committee score moved from 58.03 to 59.35 (+1.32, 1 day(s) apart).

58.03 → 59.35 (+1.3)

2026-07-28 MINOR
▼ Score Change

BIIB's Committee score moved from 59.70 to 58.03 (-1.67, 1 day(s) apart).

59.70 → 58.03 (-1.7)

2026-07-24 MINOR
▼ Score Change

BIIB's Committee score moved from 59.11 to 58.03 (-1.08, 1 day(s) apart).

59.11 → 58.03 (-1.1)

2026-07-18 MINOR
▲ Agreement Shift

BIIB's Committee agreement moved from 57.10% to 66.70% (+9.60pp, 1 day(s) apart).

57.10 → 66.70 (+9.6)

2026-07-18 MINOR
▲ Score Change

BIIB's Committee score moved from 56.47 to 58.39 (+1.92, 1 day(s) apart).

56.47 → 58.39 (+1.9)

2026-07-18 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from contested to moderate (1 day(s) apart).

contested → moderate

2026-07-16 MINOR
▲ Agreement Shift

BIIB's Committee agreement moved from 50.00% to 57.10% (+7.10pp, 1 day(s) apart).

50.00 → 57.10 (+7.1)

2026-07-16 MINOR
▼ Score Change

BIIB's Committee score moved from 58.59 to 56.47 (-2.12, 1 day(s) apart).

58.59 → 56.47 (-2.1)

2026-07-15 MATERIAL
▼ Agreement Shift

BIIB's Committee agreement moved from 60.00% to 50.00% (-10.00pp, 1 day(s) apart).

60.00 → 50.00 (-10.0)

2026-07-15 MATERIAL
▼ Score Change

BIIB's Committee score moved from 64.19 to 58.59 (-5.60, 1 day(s) apart).

64.19 → 58.59 (-5.6)

2026-07-15 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from moderate to contested (1 day(s) apart).

moderate → contested

2026-07-15 MAJOR
— Rating Change

BIIB moved from Buy to Watch (1 day(s) apart).

Buy → Watch

2026-07-14 MAJOR
▼ Agreement Shift

BIIB's Committee agreement moved from 80.00% to 60.00% (-20.00pp, 1 day(s) apart).

80.00 → 60.00 (-20.0)

2026-07-14 MINOR
▼ Score Change

BIIB's Committee score moved from 68.61 to 64.19 (-4.42, 1 day(s) apart).

68.61 → 64.19 (-4.4)

2026-07-14 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from high to moderate (1 day(s) apart).

high → moderate

2026-07-13 MATERIAL
▲ Agreement Shift

BIIB's Committee agreement moved from 66.70% to 80.00% (+13.30pp, 1 day(s) apart).

66.70 → 80.00 (+13.3)

2026-07-13 MINOR
▲ Score Change

BIIB's Committee score moved from 64.47 to 68.61 (+4.14, 1 day(s) apart).

64.47 → 68.61 (+4.1)

2026-07-13 MATERIAL
— Conviction Change

BIIB's Committee conviction moved from moderate to high (1 day(s) apart).

moderate → high

2026-07-10 MATERIAL
▲ Score Change

BIIB's Committee score moved from 62.99 to 68.61 (+5.62, 3 day(s) apart).

62.99 → 68.61 (+5.6)

2026-07-10 MAJOR
— Conviction Change

BIIB's Committee conviction moved from contested to high (3 day(s) apart).

contested → high

How Change Detection Works

Every night, Innellis compares the committee's latest scores against the previous session. Changes are recorded only when they cross documented materiality thresholds — score moves, rating transitions, conviction shifts, and analyst agreement changes. Small day-to-day noise is deliberately filtered out. View full score history →