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 | $91.8M | Sell |
500,507
-73,337
| -13% | -$13.5M | 0.04% | 433 |
|
|
2025
Q4 | $101M | Buy |
573,844
+371,545
| +184% | +$60.7M | 0.04% | 363 |
|
|
2025
Q3 | $28.3M | Sell |
202,299
-20,941
| -9% | -$2.83M | 0.01% | 880 |
|
|
2025
Q2 | $28M | Sell |
223,240
-79,375
| -26% | -$9.89M | 0.01% | 806 |
|
|
2025
Q1 | $41.4M | Buy |
302,615
+38,276
| +14% | +$5.47M | 0.02% | 628 |
|
|
2024
Q4 | $40.4M | Buy |
264,339
+26,191
| +11% | +$4.42M | 0.02% | 613 |
|
|
2024
Q3 | $46.2M | Buy |
238,148
+14,801
| +7% | +$3.1M | 0.03% | 561 |
|
|
2024
Q2 | $51.8M | Buy |
223,347
+4,630
| +2% | +$1.01M | 0.03% | 481 |
|
|
2024
Q1 | $47.2M | Sell |
218,717
-1,936
| -0.9% | -$453K | 0.03% | 510 |
|
|
2023
Q4 | $57.1M | Sell |
220,653
-1,105
| -0.5% | -$271K | 0.04% | 411 |
|
|
2023
Q3 | $57M | Sell |
221,758
-13,144
| -6% | -$3.52M | 0.04% | 379 |
|
|
2023
Q2 | $66.9M | Buy |
234,902
+4,936
| +2% | +$1.47M | 0.04% | 347 |
|
|
2023
Q1 | $63.9M | Buy |
229,966
+33,140
| +17% | +$9.17M | 0.04% | 327 |
|
|
2022
Q4 | $54.5M | Sell |
196,826
-58,384
| -23% | -$16.5M | 0.04% | 380 |
|
|
2022
Q3 | $68.1M | Buy |
255,210
+68,887
| +37% | +$14.6M | 0.05% | 297 |
|
|
2022
Q2 | $38M | Sell |
186,323
-19,455
| -9% | -$3.98M | 0.03% | 487 |
|
|
2022
Q1 | $43.3M | Sell |
205,778
-176,956
| -46% | -$38.5M | 0.03% | 561 |
|
|
2021
Q4 | $91.8M | Buy |
382,734
+112,061
| +41% | +$28.8M | 0.05% | 346 |
|
|
2021
Q3 | $76.6M | Sell |
270,673
-4,862
| -2% | -$1.59M | 0.05% | 363 |
|
|
2021
Q2 | $95.4M | Buy |
275,535
+22,747
| +9% | +$6.89M | 0.06% | 309 |
|
|
2021
Q1 | $70.7M | Sell |
252,788
-40,462
| -14% | -$10.9M | 0.05% | 362 |
|
|
2020
Q4 | $71.8M | Buy |
293,250
+96,447
| +49% | +$24.9M | 0.04% | 388 |
|
|
2020
Q3 | $55.8M | Sell |
196,803
-21,834
| -10% | -$6.09M | 0.04% | 408 |
|
|
2020
Q2 | $58.5M | Buy |
218,637
+9,744
| +5% | +$2.93M | 0.05% | 354 |
|
|
2020
Q1 | $66.1M | Sell |
208,893
-95,288
| -31% | -$28.9M | 0.06% | 272 |
|
|
2019
Q4 | $90.3M | Buy |
304,181
+39,825
| +15% | +$11M | 0.07% | 283 |
|
|
2019
Q3 | $61.5M | Sell |
264,356
-20,717
| -7% | -$4.82M | 0.05% | 375 |
|
|
2019
Q2 | $66.7M | Buy |
285,073
+101,349
| +55% | +$23.4M | 0.05% | 343 |
|
|
2019
Q1 | $43.4M | Sell |
183,724
-57,829
| -24% | -$18.2M | 0.04% | 446 |
|
|
2018
Q4 | $72.7M | Buy |
241,553
+40,590
| +20% | +$13M | 0.07% | 267 |
|
|
2018
Q3 | $71M | Buy |
200,963
+23,468
| +13% | +$8.08M | 0.06% | 268 |
|
|
2018
Q2 | $51.5M | Sell |
177,495
-104,295
| -37% | -$29.3M | 0.05% | 359 |
|
|
2018
Q1 | $77.2M | Buy |
281,790
+46,256
| +20% | +$14.4M | 0.06% | 266 |
|
|
2017
Q4 | $75M | Sell |
235,534
-47,325
| -17% | -$15.2M | 0.06% | 291 |
|
|
2017
Q3 | $88.6M | Buy |
282,859
+103,751
| +58% | +$30.7M | 0.07% | 226 |
|
|
2017
Q2 | $48.6M | Buy |
179,108
+45,172
| +34% | +$11.9M | 0.04% | 362 |
|
|
2017
Q1 | $36.6M | Sell |
133,936
-97,682
| -42% | -$27.6M | 0.03% | 488 |
|
|
2016
Q4 | $65.7M | Buy |
231,618
+154,037
| +199% | +$45.7M | 0.06% | 308 |
|
|
2016
Q3 | $24.3M | Sell |
77,581
-29,659
| -28% | -$8.78M | 0.02% | 600 |
|
|
2016
Q2 | $25.9M | Buy |
107,240
+27,461
| +34% | +$7.24M | 0.03% | 538 |
|
|
2016
Q1 | $20.8M | Sell |
79,779
-3,126
| -4% | -$826K | 0.02% | 587 |
|
|
2015
Q4 | $25.4M | Sell |
82,905
-26,752
| -24% | -$7.69M | 0.03% | 631 |
|
|
2015
Q3 | $32M | Sell |
109,657
-31,779
| -22% | -$10.5M | 0.03% | 498 |
|
|
2015
Q2 | $57.1M | Sell |
141,436
-26,927
| -16% | -$10.8M | 0.05% | 346 |
|
|
2015
Q1 | $71.1M | Sell |
168,363
-83,528
| -33% | -$32.9M | 0.07% | 260 |
|
|
2014
Q4 | $85.5M | Buy |
251,891
+127,578
| +103% | +$41.3M | 0.08% | 252 |
|
|
2014
Q3 | $41.1M | Sell |
124,313
-39,964
| -24% | -$13.2M | 0.04% | 464 |
|
|
2014
Q2 | $51.8M | Buy |
164,277
+24,839
| +18% | +$7.48M | 0.05% | 345 |
|
|
2014
Q1 | $42.6M | Sell |
139,438
-4,007
| -3% | -$1.27M | 0.04% | 388 |
|
|
2013
Q4 | $40.1M | Sell |
143,445
-45,318
| -24% | -$11.7M | 0.04% | 460 |
|
|
2013
Q3 | $45.4M | Sell |
188,763
-28,063
| -13% | -$6.28M | 0.04% | 380 |
|
|
2013
Q2 | $46.7M | Buy |
+216,826
| New | +$46.3M | 0.05% | 336 |
|
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.