Citigroup’s Biogen BIIB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $3.89M | Sell |
21,200
-57,900
| -73% | -$10.7M | ﹤0.01% | 2156 |
|
|
2025
Q4 | $13.9M | Hold |
79,100
| – | – | 0.01% | 1318 |
|
|
2025
Q3 | $11.1M | Hold |
79,100
| – | – | ﹤0.01% | 1408 |
|
|
2025
Q2 | $9.93M | Sell |
79,100
-14,900
| -16% | -$1.86M | ﹤0.01% | 1372 |
|
|
2025
Q1 | $12.9M | Sell |
94,000
-70,300
| -43% | -$10M | 0.01% | 1210 |
|
|
2024
Q4 | $25.1M | Buy |
164,300
+161,100
| +5,034% | +$27.2M | 0.01% | 832 |
|
|
2024
Q3 | $620K | Sell |
3,200
-15,000
| -82% | -$3.14M | ﹤0.01% | 3592 |
|
|
2024
Q2 | $4.22M | Buy |
18,200
+15,000
| +469% | +$3.26M | ﹤0.01% | 1755 |
|
|
2024
Q1 | $690K | Sell |
3,200
-44,900
| -93% | -$10.5M | ﹤0.01% | 3324 |
|
|
2023
Q4 | $12.4M | Sell |
48,100
-32,100
| -40% | -$7.88M | 0.01% | 1105 |
|
|
2023
Q3 | $20.6M | Buy |
80,200
+40,000
| +100% | +$10.7M | 0.02% | 771 |
|
|
2023
Q2 | $11.5M | Sell |
40,200
-24,800
| -38% | -$7.38M | 0.01% | 1087 |
|
|
2023
Q1 | $18.1M | Buy |
+65,000
| New | +$18M | 0.01% | 870 |
|
|
2022
Q4 | – | Sell |
-40,000
| Closed | -$10.7M | – | 5780 |
|
|
2022
Q3 | $10.7M | Buy |
40,000
+15,000
| +60% | +$3.19M | 0.01% | 1105 |
|
|
2022
Q2 | $5.1M | Buy |
+25,000
| New | +$5.11M | ﹤0.01% | 1530 |
|
|
2022
Q1 | – | Sell |
-61,000
| Closed | -$14.6M | – | 6306 |
|
|
2021
Q4 | $14.6M | Hold |
61,000
| – | – | 0.01% | 1184 |
|
|
2021
Q3 | $17.3M | Buy |
61,000
+25,100
| +70% | +$8.23M | 0.01% | 1089 |
|
|
2021
Q2 | $12.4M | Buy |
35,900
+18,400
| +105% | +$5.57M | 0.01% | 1279 |
|
|
2021
Q1 | $4.9M | Sell |
17,500
-184,800
| -91% | -$49.8M | ﹤0.01% | 1802 |
|
|
2020
Q4 | $49.5M | Buy |
202,300
+54,900
| +37% | +$14.2M | 0.03% | 546 |
|
|
2020
Q3 | $41.8M | Buy |
147,400
+33,000
| +29% | +$9.2M | 0.03% | 525 |
|
|
2020
Q2 | $30.6M | Sell |
114,400
-40,100
| -26% | -$12.1M | 0.02% | 594 |
|
|
2020
Q1 | $48.9M | Sell |
154,500
-8,200
| -5% | -$2.49M | 0.04% | 367 |
|
|
2019
Q4 | $48.3M | Buy |
162,700
+42,600
| +35% | +$11.8M | 0.04% | 525 |
|
|
2019
Q3 | $28M | Buy |
120,100
+16,500
| +16% | +$3.84M | 0.02% | 740 |
|
|
2019
Q2 | $24.2M | Buy |
103,600
+15,300
| +17% | +$3.53M | 0.02% | 826 |
|
|
2019
Q1 | $20.9M | Sell |
88,300
-111,100
| -56% | -$35M | 0.02% | 806 |
|
|
2018
Q4 | $60M | Buy |
199,400
+59,000
| +42% | +$18.8M | 0.06% | 333 |
|
|
2018
Q3 | $49.6M | Sell |
140,400
-9,100
| -6% | -$3.13M | 0.04% | 395 |
|
|
2018
Q2 | $43.4M | Buy |
149,500
+11,200
| +8% | +$3.15M | 0.04% | 414 |
|
|
2018
Q1 | $37.9M | Sell |
138,300
-38,500
| -22% | -$12M | 0.03% | 491 |
|
|
2017
Q4 | $56.3M | Buy |
176,800
+15,300
| +9% | +$4.91M | 0.05% | 391 |
|
|
2017
Q3 | $50.6M | Buy |
161,500
+49,100
| +44% | +$14.5M | 0.04% | 396 |
|
|
2017
Q2 | $30.5M | Buy |
112,400
+4,800
| +4% | +$1.27M | 0.03% | 562 |
|
|
2017
Q1 | $29.4M | Sell |
107,600
-211,400
| -66% | -$59.8M | 0.03% | 578 |
|
|
2016
Q4 | $90.5M | Buy |
319,000
+159,900
| +101% | +$47.4M | 0.08% | 231 |
|
|
2016
Q3 | $49.8M | Buy |
159,100
+48,400
| +44% | +$14.3M | 0.05% | 341 |
|
|
2016
Q2 | $26.8M | Buy |
110,700
+50,700
| +85% | +$13.4M | 0.03% | 528 |
|
|
2016
Q1 | $15.6M | Sell |
60,000
-50,000
| -45% | -$13.2M | 0.02% | 739 |
|
|
2015
Q4 | $33.7M | Sell |
110,000
-94,500
| -46% | -$27.2M | 0.03% | 499 |
|
|
2015
Q3 | $59.7M | Buy |
204,500
+52,000
| +34% | +$17.2M | 0.06% | 295 |
|
|
2015
Q2 | $61.6M | Buy |
152,500
+80,500
| +112% | +$32.3M | 0.05% | 326 |
|
|
2015
Q1 | $30.4M | Sell |
72,000
-13,200
| -15% | -$5.2M | 0.03% | 569 |
|
|
2014
Q4 | $28.9M | Buy |
85,200
+7,600
| +10% | +$2.46M | 0.03% | 622 |
|
|
2014
Q3 | $25.7M | Sell |
77,600
-15,500
| -17% | -$5.11M | 0.02% | 670 |
|
|
2014
Q2 | $29.4M | Sell |
93,100
-50,000
| -35% | -$15M | 0.03% | 570 |
|
|
2014
Q1 | $43.8M | Sell |
143,100
-65,500
| -31% | -$20.8M | 0.04% | 376 |
|
|
2013
Q4 | $58.4M | Sell |
208,600
-77,300
| -27% | -$20M | 0.05% | 325 |
|
|
2013
Q3 | $68.8M | Buy |
285,900
+98,300
| +52% | +$22M | 0.06% | 268 |
|
|
2013
Q2 | $40.4M | Buy |
+187,600
| New | +$40.1M | 0.04% | 395 |
|
Other funds holding BIIB
VCM
VPM
Citigroup's BIIB Position: Q1 2026 in Review
Citigroup reduced its Biogen (BIIB) stake by 13% in Q1 2026, selling an estimated $13.5M and leaving 500,507 shares worth $91.8M. The position accounts for 0.04% of the portfolio, ranked #433.
Citigroup first reported a position in BIIB in Q2 2013 and has held it in 52 quarters since. The position peaked at $101M in Q4 2025. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.
- Citigroup held 500,507 shares of Biogen worth $91.8M as of Q1 2026.
- Citigroup sold 73,337 Biogen shares in Q1 2026, an estimated $13.5M.
- Biogen made up 0.04% of Citigroup's portfolio in Q1 2026, its #433 holding.
- Citigroup first reported a position in Biogen in Q2 2013 and has held it in 52 quarters since.
- Citigroup's Biogen position peaked at $101M in Q4 2025.
- 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.
Based on Citigroup's 13F filing for Q1 2026, filed 11 May 2026.