Who holds BIIBticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

BIOGEN INC · COM · quarter ended 2026-03-31 · 27 members disclosed BIIB ↗

788

holders13F filers reporting this class for the quarter ended 2026-03-31; the 500 largest are listed

$22.6B

combined valuesum of the reported values across every holder; NULL values are excluded, never zero-filled

413

addsholders whose share count rose or who opened the position (new + add), by shares

120

exitsholders absent this quarter after holding last quarter — inferred from absence, not a sale record

Holders — quarter ended 2026-03-31

ranked by reported value · Δ shares vs 2025-12-31 · kind by shares

13F holders of BIIB ranked by reported value
#	Filer	Reported value	Shares	Δ shares	Change
1	BlackRock, Inc.	$2.9B	15,974,601	+1,163,231	add
2	PRIMECAP MANAGEMENT CO/CA/	$2.7B	14,757,607	−390	trim
3	FMR LLC	$2.3B	12,807,541	+3,381,678	add
4	VANGUARD CAPITAL MANAGEMENT LLC	$1.7B	9,537,417	—	no prior
5	STATE STREET CORP	$1.3B	7,167,922	+8,902	add
6	VANGUARD PORTFOLIO MANAGEMENT LLC	$1.2B	6,531,727	—	no prior
7	GEODE CAPITAL MANAGEMENT, LLC	$793M	4,342,602	+143,203	add
8	WELLINGTON MANAGEMENT GROUP LLP	$543M	2,961,641	−589,628	trim
9	MORGAN STANLEY	$398M	2,170,940	−154,073	trim
10	AQR CAPITAL MANAGEMENT LLC	$346M	1,923,557	+394,941	add
11	Invesco Ltd.	$320M	1,745,255	+89,814	add
12	Boston Partners	$312M	1,700,078	−20,517	trim
13	NORTHERN TRUST CORP	$265M	1,446,579	+453	add
14	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	$253M	1,377,568	−13,802	trim
15	Legal & General Group Plc	$247M	1,349,832	−109,765	trim
16	BANK OF AMERICA CORP /DE/	$212M	1,156,369	+27,524	add
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	$211M	1,149,394	+5,492	add
18	DIMENSIONAL FUND ADVISORS LP	$198M	1,079,119	+118,474	add
19	DEUTSCHE BANK AG\	$195M	1,063,828	+110,100	add
20	Pictet Asset Management Holding SA	$168M	913,328	−34,166	trim
21	VANGUARD FIDUCIARY TRUST CO	$151M	825,531	—	no prior
22	Point72 Asset Management, L.P.	$148M	809,617	−2,003,575	trim
23	Alyeska Investment Group, L.P.	$148M	805,050	−219,218	trim
24	Amundi	$145M	790,827	+218,398	add
25	Bank of New York Mellon Corp	$145M	788,523	−22,583	trim
26	Robeco Institutional Asset Management B.V.	$140M	763,174	+152,266	add
27	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	$134M	720,629	+8,070	add
28	Employees Provident Fund Board	$129M	704,196	0	no change
29	FIRST TRUST ADVISORS LP	$124M	673,958	+108,111	add
30	BALYASNY ASSET MANAGEMENT L.P.	$119M	650,046	+42,093	add
31	AustralianSuper Pty Ltd	$113M	616,193	+139,381	add
32	Artemis Investment Management LLP	$105M	571,571	+344,726	add
33	BARCLAYS PLC	$101M	551,474	−753,533	trim
34	ROYAL BANK OF CANADA	$97.4M	531,377	−10,448	trim
35	UBS Group AG	$96.0M	523,450	−118,338	trim
36	Zurcher Kantonalbank (Zurich Cantonalbank)	$95.7M	522,155	+69,713	add
37	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC	$95.1M	518,694	−69,851	trim
38	CITIGROUP INC	$91.8M	500,507	−73,337	trim
39	HSBC HOLDINGS PLC	$84.6M	463,652	−544,012	trim
40	Swiss National Bank	$78.9M	430,600	+28,800	add
41	National Pension Service	$73.6M	401,667	+401,667	new
42	Candriam S.C.A.	$70.0M	381,768	+51,296	add
43	Patient Capital Management, LLC	$69.6M	379,741	−196,611	trim
44	Nuveen, LLC	$65.8M	358,838	−16,719	trim
45	Sumitomo Mitsui Trust Group, Inc.	$65.3M	356,291	−14,336	trim
46	Vanguard Global Advisers, LLC	$63.0M	343,768	—	no prior
47	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	$62.5M	340,903	+10,097	add
48	Mitsubishi UFJ Asset Management Co., Ltd.	$61.3M	334,413	+14,504	add
49	ADAGE CAPITAL PARTNERS GP, L.L.C.	$61.1M	333,457	+39,100	add
50	VICTORY CAPITAL MANAGEMENT INC	$58.8M	320,785	+74,135	add
51	Man Group plc	$58.4M	318,745	−20,539	trim
52	FIL Ltd	$58.3M	318,056	−1,488	trim
53	Fisher Asset Management, LLC	$57.3M	312,618	+19,349	add
54	Gotham Asset Management, LLC	$54.7M	298,437	+21,628	add
55	Swedbank AB	$53.1M	289,840	+58,231	add
56	CAUSEWAY CAPITAL MANAGEMENT LLC	$51.5M	280,783	−240,318	trim
57	RHUMBLINE ADVISERS	$50.5M	275,438	+3,692	add
58	VANGUARD ASSET MANAGEMENT, Ltd	$45.8M	249,778	—	no prior
59	Sofinnova Investments, Inc.	$42.1M	229,521	+229,521	new
60	BNP Paribas Asset Management Holding S.A.	$39.5M	215,436	−30,244	trim
61	Qube Research & Technologies Ltd	$39.0M	212,921	+212,921	new
62	ALLIANCEBERNSTEIN L.P.	$37.5M	212,897	+29,153	add
63	RENAISSANCE TECHNOLOGIES LLC	$37.3M	203,396	−195,800	trim
64	Hudson Bay Capital Management LP	$36.9M	201,367	−20,493	trim
65	Logos Global Management LP	$36.7M	200,000	0	no change
66	KLP KAPITALFORVALTNING AS	$36.5M	199,177	+7,500	add
67	PRINCIPAL FINANCIAL GROUP INC	$34.3M	187,059	+2,870	add
68	Allianz Asset Management GmbH	$32.6M	178,049	−69,673	trim
69	IEQ CAPITAL, LLC	$27.9M	152,076	+12,437	add
70	ExodusPoint Capital Management, LP	$27.9M	151,993	+151,993	new
71	Aberdeen Group plc	$27.7M	151,144	+11,266	add
72	LETKO, BROSSEAU & ASSOCIATES INC	$27.7M	150,865	+21,085	add
73	FRANKLIN RESOURCES INC	$26.5M	144,448	+3,074	add
74	PANAGORA ASSET MANAGEMENT INC	$26.0M	142,065	+138,862	add
75	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	$25.9M	141,324	+31,056	add
76	Palo Alto Investors LP	$25.8M	140,719	+140,719	new
77	SUSQUEHANNA INTERNATIONAL GROUP, LLP	$25.7M	140,299	−521,385	trim
78	CITADEL ADVISORS LLC	$25.3M	138,093	+97,669	add
79	AMERIPRISE FINANCIAL INC	$24.3M	132,603	+842	add
80	Eurizon Capital SGR S.p.A.	$23.7M	129,204	−1,609	trim
81	TD ASSET MANAGEMENT INC	$23.3M	127,268	−8,084	trim
82	WELLS FARGO & COMPANY/MN	$23.3M	127,134	+7,796	add
83	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	$22.8M	124,212	−1,538	trim
84	Portolan Capital Management, LLC	$21.7M	118,481	+33,491	add
85	Creative Planning	$21.5M	117,236	+27,234	add
86	Quantinno Capital Management LP	$21.3M	116,374	+18,041	add
87	LMR Partners LLP	$21.3M	116,131	+107,501	add
88	CANADA PENSION PLAN INVESTMENT BOARD	$21.1M	114,938	−23,140	trim
89	Susquehanna Portfolio Strategies, LLC	$20.5M	111,830	+5,716	add
90	Rhenman & Partners Asset Management AB	$20.0M	109,100	+16,750	add
91	Woodline Partners LP	$20.0M	109,032	+6,714	add
92	AMERICAN CENTURY COMPANIES INC	$19.2M	104,783	+18,959	add
93	ADAMS DIVERSIFIED EQUITY FUND, INC.	$18.4M	100,300	+56,000	add
94	NEW YORK STATE COMMON RETIREMENT FUND	$18.3M	99,845	+600	add
95	Walleye Trading LLC	$18.2M	99,532	+4,010	add
96	FEDERATED HERMES, INC.	$17.8M	97,279	−33,889	trim
97	AVIVA PLC	$17.8M	96,864	−28,034	trim
98	RAYMOND JAMES FINANCIAL INC	$17.7M	96,699	+12,985	add
99	Defilade Capital Management, L.P.	$17.7M	96,289	−65,703	trim
100	MANUFACTURERS LIFE INSURANCE COMPANY, THE	$17.4M	95,108	−10,628	trim
101	MILLENNIUM MANAGEMENT LLC	$17.2M	93,964	−1,031,622	trim
102	BANK OF MONTREAL /CAN/	$17.0M	92,709	−20,975	trim
103	SPHERA FUNDS MANAGEMENT LTD.	$17.0M	92,526	−2,212	trim
104	SECTOR GAMMA AS	$16.5M	90,096	+4,621	add
105	Illinois Municipal Retirement Fund	$16.4M	89,303	+7,905	add
106	LPL Financial LLC	$15.0M	81,720	−7,817	trim
107	NATIONAL BANK OF CANADA /FI/	$14.5M	78,880	−17,662	trim
108	STATE OF WISCONSIN INVESTMENT BOARD	$14.4M	78,564	+2,620	add
109	Cerity Partners LLC	$14.1M	76,644	+8,278	add
110	Korea Investment CORP	$13.6M	73,988	+20,081	add
111	Vanguard Investments Australia, Ltd.	$13.4M	73,268	—	no prior
112	APG Asset Management N.V.	$13.4M	84,047	−11,025	trim
113	Chevy Chase Trust Holdings, LLC	$13.3M	72,645	−2,079	trim
114	Mariner, LLC	$13.2M	72,036	+19,561	add
115	SEI INVESTMENTS CO	$13.1M	71,513	+12,017	add
116	MACKENZIE FINANCIAL CORP	$13.1M	71,432	+357	add
117	Universal- Beteiligungs- und Servicegesellschaft mbH	$12.6M	68,243	−55,493	trim
118	Cresset Asset Management, LLC	$12.4M	67,503	−8,876	trim
119	BANQUE PICTET & CIE SA	$12.1M	66,061	−5,297	trim
120	Mitsubishi UFJ Trust & Banking Corp	$11.9M	65,094	−224	trim
121	ENVESTNET ASSET MANAGEMENT INC	$11.9M	64,693	+5,874	add
122	ROYAL LONDON ASSET MANAGEMENT LTD	$11.8M	64,266	−299	trim
123	Asset Management One Co., Ltd.	$11.8M	64,100	−3,353	trim
124	NOMURA ASSET MANAGEMENT CO LTD	$11.5M	62,978	−4,373	trim
125	ORBIMED ADVISORS LLC	$11.3M	61,600	+61,600	new
126	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	$11.1M	60,776	+2,940	add
127	Integral Health Asset Management, LLC	$11.0M	60,000	−40,000	trim
128	Tidal Investments LLC	$10.9M	58,586	+28,108	add
129	SCHRODER INVESTMENT MANAGEMENT GROUP	$10.8M	58,828	+1,556	add
130	GLENVIEW CAPITAL MANAGEMENT, LLC	$10.5M	57,019	−233,586	trim
131	EDMOND DE ROTHSCHILD HOLDING S.A.	$10.4M	56,970	−10,000	trim
132	CWM, LLC	$10.1M	55,175	+6,285	add
133	VOYA INVESTMENT MANAGEMENT LLC	$10.0M	54,561	−8,134	trim
134	Andra AP-fonden	$9.5M	52,000	+49,500	add
135	SILVERARC CAPITAL MANAGEMENT, LLC	$9.3M	50,967	−24,445	trim
136	GATEWAY INVESTMENT ADVISERS LLC	$9.3M	50,923	+2,762	add
137	State of New Jersey Common Pension Fund D	$9.2M	50,137	+1,192	add
138	HighTower Advisors, LLC	$9.1M	49,851	+37,892	add
139	Schonfeld Strategic Advisors LLC	$9.0M	48,828	−58,240	trim
140	Lansforsakringar Fondforvaltning AB (publ)	$8.8M	47,807	−918	trim
141	DANSKE BANK A/S	$8.7M	47,417	−998	trim
142	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	$8.7M	47,333	+47,333	new
143	Ethic Inc.	$8.7M	47,293	−1,298	trim
144	Resona Asset Management Co.,Ltd.	$8.5M	46,261	+1,075	add
145	Tredje AP-fonden	$8.5M	46,370	+46,370	new
146	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	$8.4M	46,062	−1,308	trim
147	Dakota Wealth Management	$8.4M	45,587	−310	trim
148	CONTRAVISORY INVESTMENT MANAGEMENT, INC.	$8.2M	44,677	+44,677	new
149	Privium Fund Management B.V.	$8.0M	43,800	−29,680	trim
150	Generali Investments CEE, investicni spolecnost, a.s.	$8.0M	43,552	0	no change
151	TORONTO DOMINION BANK	$8.0M	43,371	−5,802	trim
152	STATE OF MICHIGAN RETIREMENT SYSTEM	$7.9M	43,003	−100	trim
153	BANCO BILBAO VIZCAYA ARGENTARIA, S.A.	$7.8M	42,471	−104,480	trim
154	CIBC Bancorp USA Inc.	$7.7M	41,902	—	no prior
155	SEB Asset Management AB	$7.7M	41,869	—	no prior
156	OSSIAM	$7.5M	40,960	−21,303	trim
157	STIFEL FINANCIAL CORP	$7.5M	40,938	−10,308	trim
158	Mirae Asset Global Investments Co., Ltd.	$7.4M	40,238	+5,131	add
159	Czech National Bank	$7.3M	39,969	+1,286	add
160	Arizona State Retirement System	$7.3M	39,863	−357	trim
161	Orion Investment Co	$7.3M	39,610	+206	add
162	FJARDE AP-FONDEN /FOURTH SWEDISH NATIONAL PENSION FUND	$7.2M	39,303	+12,750	add
163	MERCER GLOBAL ADVISORS INC /ADV	$7.1M	38,600	−3,875	trim
164	IFM Investors Pty Ltd	$7.1M	38,521	−1,334	trim
165	USS Investment Management Ltd	$6.8M	37,217	+3,001	add
166	Corient Private Wealth LLC	$6.7M	36,952	−50,515	trim
167	MARTINGALE ASSET MANAGEMENT L P	$6.7M	36,735	+36,735	new
168	Vanguard Personalized Indexing Management, LLC	$6.7M	36,413	−2,180	trim
169	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	$6.7M	62,530	+24,582	add
170	Squarepoint Ops LLC	$6.6M	36,053	−110,355	trim
171	ProShare Advisors LLC	$6.6M	35,926	−5,570	trim
172	NISA INVESTMENT ADVISORS, LLC	$6.6M	35,820	−2,615	trim
173	Calamos Advisors LLC	$6.5M	35,527	0	no change
174	Walleye Capital LLC	$6.5M	35,339	+33,764	add
175	CIBC Asset Management Inc	$6.5M	35,196	+749	add
176	Rafferty Asset Management, LLC	$6.4M	35,018	−13,541	trim
177	TANG CAPITAL MANAGEMENT LLC	$6.4M	35,000	0	no change
178	RITHOLTZ WEALTH MANAGEMENT	$6.4M	34,943	+6,568	add
179	CWA Asset Management Group, LLC	$6.4M	34,830	+2,296	add
180	GRIMES & Co WEALTH MANAGEMENT, LLC	$6.4M	34,684	+840	add
181	MetLife Investment Management, LLC	$6.3M	34,279	−876	trim
182	Generali Asset Management SPA SGR	$6.3M	34,194	+7,013	add
183	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	$6.3M	34,186	+62	add
184	Ensign Peak Advisors, Inc	$6.2M	33,710	+23,034	add
185	Nippon Life Global Investors Americas, Inc.	$6.2M	33,570	+7,080	add
186	LEUTHOLD GROUP, LLC	$6.1M	33,143	+554	add
187	QRG CAPITAL MANAGEMENT, INC.	$6.1M	33,002	+29,207	add
188	FIFTH THIRD BANCORP	$6.0M	32,716	+23,504	add
189	Lighthouse Investment Partners, LLC	$6.0M	32,632	+26,844	add
190	Swiss Life Asset Management Ltd	$5.7M	31,288	+6,092	add
191	US BANCORP \DE\	$5.7M	31,223	+4,466	add
192	DnB Asset Management AS	$5.7M	31,221	+2,492	add
193	Retirement Systems of Alabama	$5.7M	31,166	−44	trim
194	Baader Bank Aktiengesellschaft	$5.6M	30,801	−1,690	trim
195	NISSAY ASSET MANAGEMENT CORP /JAPAN	$5.5M	29,762	+3,476	add
196	B. Metzler seel. Sohn & Co. AG	$5.4M	29,725	−246	trim
197	Hillman Capital Management, Inc.	$5.4M	29,540	−976	trim
198	Insight Wealth Strategies, LLC	$5.4M	29,346	+386	add
199	PEAK6 LLC	$5.2M	28,166	+28,166	new
200	Daiwa Securities Group Inc.	$5.0M	27,136	+859	add
201	XPONANCE LLC	$4.9M	26,456	+3,418	add
202	Leonteq Securities AG	$4.8M	26,454	−1,506	trim
203	GUGGENHEIM CAPITAL LLC	$4.8M	26,382	+2,362	add
204	Caprock Group, LLC	$4.7M	25,651	+2,198	add
205	Atom Investors LP	$4.5M	24,749	+3,029	add
206	Old North State Wealth Management, LLC	$4.5M	24,595	+786	add
207	NorthCrest Asset Manangement, LLC	$4.4M	25,012	−8,775	trim
208	PUBLIC SECTOR PENSION INVESTMENT BOARD	$4.4M	23,792	+4,602	add
209	Utah Retirement Systems	$4.3M	23,714	−282	trim
210	CREDIT AGRICOLE S A	$4.2M	22,985	−53,790	trim
211	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	$4.2M	22,926	−1,993	trim
212	Leo Wealth, LLC	$4.2M	22,737	+4,604	add
213	NATIXIS	$4.1M	22,585	−6,519	trim
214	Cetera Investment Advisers	$4.1M	22,444	−1,059	trim
215	Rakuten Investment Management, Inc.	$4.1M	21,778	+2,483	add
216	NEW YORK LIFE INVESTMENT MANAGEMENT LLC	$4.0M	21,905	+595	add
217	Jefferies Financial Group Inc.	$4.0M	21,902	−10,611	trim
218	Empowered Funds, LLC	$4.0M	21,775	−36,186	trim
219	SummitTX Capital, L.P.	$4.0M	21,656	+21,656	new
220	TEACHER RETIREMENT SYSTEM OF TEXAS	$3.9M	21,299	−2,190	trim
221	Focus Partners Wealth	$3.9M	20,982	+6,401	add
222	NEOS Investment Management LLC	$3.8M	20,840	+4,306	add
223	Sumitomo Mitsui DS Asset Management Company, Ltd	$3.8M	20,489	+67	add
224	BANK OF NOVA SCOTIA	$3.7M	20,436	−2,259	trim
225	BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp	$3.7M	20,217	−5,743	trim
226	OMERS ADMINISTRATION Corp	$3.7M	20,149	+3,341	add
227	Federation des caisses Desjardins du Quebec	$3.6M	19,581	+7,233	add
228	Cinctive Capital Management LP	$3.5M	19,349	−32,824	trim
229	Morningstar Investment Management LLC	$3.5M	19,344	+565	add
230	Janus Henderson Group Ltd.	$3.5M	18,975	−1,277	trim
231	Artia Global Partners LP	$3.4M	18,437	+18,437	new
232	COMMONWEALTH EQUITY SERVICES, LLC	$3.3M	18,102	−292	trim
233	Kintegral Advisory, LLC	$3.3M	17,946	−796	trim
234	Elo Mutual Pension Insurance Co	$3.2M	17,727	+585	add
235	MH & ASSOCIATES SECURITIES MANAGEMENT CORP /ADV	$3.2M	17,717	+119	add
236	Fieldview Capital Management, LLC	$3.2M	17,659	+3,387	add
237	LAZARD ASSET MANAGEMENT LLC	$3.1M	16,935	−29,188	trim
238	OREGON PUBLIC EMPLOYEES RETIREMENT FUND	$3.1M	16,841	+100	add
239	NOMURA HOLDINGS INC	$3.1M	16,730	−130,531	trim
240	SYSTEMATIC FINANCIAL MANAGEMENT LP	$3.0M	16,220	−420	trim
241	NORDEA INVESTMENT MANAGEMENT AB	$3.0M	16,586	+2,564	add
242	M&T BANK CORP	$2.9M	15,817	−944	trim
243	Wealthfront Advisers LLC	$2.9M	15,679	+128	add
244	MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC	$2.9M	15,656	−137	trim
245	UniSuper Management Pty Ltd	$2.9M	15,572	−855	trim
246	CLARK ESTATES INC/NY	$2.8M	15,300	0	no change
247	OP Asset Management Ltd	$2.8M	15,263	—	no prior
248	FULLER & THALER ASSET MANAGEMENT, INC.	$2.8M	15,239	−14,559	trim
249	YOUSIF CAPITAL MANAGEMENT, LLC	$2.8M	15,206	−714	trim
250	DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD.	$2.7M	15,000	+15,000	new
251	Pathstone Holdings, LLC	$2.7M	14,908	+1,100	add
252	Avanza Fonder AB	$2.7M	14,621	−122	trim
253	BOOTHBAY FUND MANAGEMENT, LLC	$2.6M	14,268	+14,268	new
254	EVOKE WEALTH, LLC	$2.5M	13,831	+288	add
255	Vontobel Holding Ltd.	$2.5M	13,710	+3,869	add
256	Convergence Investment Partners, LLC	$2.5M	13,557	+1,401	add
257	NewEdge Advisors, LLC	$2.4M	13,031	+13,031	new
258	BLAIR WILLIAM & CO/IL	$2.4M	12,854	+4,411	add
259	BEACON INVESTMENT ADVISORY SERVICES, INC.	$2.3M	12,314	−360	trim
260	OSAIC HOLDINGS, INC.	$2.2M	12,005	−2,442	trim
261	Pallas Capital Advisors LLC	$2.2M	11,963	+180	add
262	PROFUND ADVISORS LLC	$2.2M	11,961	−2,239	trim
263	TRUIST FINANCIAL CORP	$2.1M	11,566	+159	add
264	Merit Financial Group, LLC	$2.1M	11,430	+913	add
265	MML INVESTORS SERVICES, LLC	$2.1M	11,340	+3,115	add
266	ADAR1 Capital Management, LLC	$2.0M	11,000	−13,300	trim
267	Investment Management Corp of Ontario	$1.9M	10,534	−1,808	trim
268	JANE STREET GROUP, LLC	$1.9M	10,469	−13,070	trim
269	Missouri Trust & Investment Co	$1.9M	10,380	+1,890	add
270	Graham Capital Management, L.P.	$1.9M	10,342	+10,342	new
271	GFS Advisors, LLC	$1.9M	23,915	+23,915	new
272	K.J. Harrison & Partners Inc	$1.8M	10,000	0	no change
273	Crossmark Global Holdings, Inc.	$1.8M	9,961	—	no prior
274	Sequoia Financial Advisors, LLC	$1.8M	9,953	−611	trim
275	Pinnacle Financial Partners, Inc.	$1.8M	9,925	−984	trim
276	KENNEDY CAPITAL MANAGEMENT LLC	$1.8M	9,808	+805	add
277	GREAT LAKES ADVISORS, LLC	$1.7M	9,490	0	no change
278	TWO SIGMA INVESTMENTS, LP	$1.7M	9,444	−242,319	trim
279	AIA Group Ltd	$1.7M	9,329	+7,054	add
280	Norinchukin Bank, The	$1.7M	9,220	+34	add
281	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	$1.7M	9,220	−33,522	trim
282	Farringdon Capital, Ltd.	$1.7M	9,054	+9,054	new
283	Focus Partners Advisor Solutions, LLC	$1.7M	9,011	+1,506	add
284	MIZUHO SECURITIES USA LLC	$1.6M	8,872	−1,810	trim
285	AUXIER ASSET MANAGEMENT LLC	$1.6M	8,869	−42	trim
286	KEYBANK NATIONAL ASSOCIATION/OH	$1.6M	8,834	+416	add
287	Sompo Asset Management Co., Ltd.	$1.6M	8,776	+1,200	add
288	GROUPAMA ASSET MANAGMENT	$1.6M	8,753	+322	add
289	M&G Plc	$1.6M	8,593	0	no change
290	MACQUARIE GROUP LTD	$1.6M	8,512	−17,897	trim
291	Orion Porfolio Solutions, LLC	$1.6M	8,497	−2,943	trim
292	HARTFORD INVESTMENT MANAGEMENT CO	$1.5M	8,401	−100	trim
293	AG2R LA MONDIALE GESTION D'ACTIFS	$1.5M	8,375	+111	add
294	QUADRANT CAPITAL GROUP LLC	$1.5M	8,168	−496	trim
295	Banque Cantonale Vaudoise	$1.5M	7,928	+4,466	add
296	Jacobi Capital Management LLC	$1.4M	7,649	−187	trim
297	Allspring Global Investments Holdings, LLC	$1.3M	7,322	+36	add
298	Brooklyn Investment Group	$1.3M	7,323	+1,621	add
299	Krilogy Financial LLC	$1.3M	7,590	−116	trim
300	Sigma Planning Corp	$1.3M	7,201	+1,955	add
301	JUPITER ASSET MANAGEMENT LTD	$1.3M	7,141	+7,141	new
302	Generali Investments, Management Co LLC	$1.3M	7,112	−3,862	trim
303	Maryland State Retirement & Pension System	$1.3M	7,095	−286	trim
304	COMMERCE BANK	$1.3M	7,074	+696	add
305	NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	$1.3M	7,046	+462	add
306	Assenagon Asset Management S.A.	$1.3M	6,969	+769	add
307	Kennondale Capital Management LLC	$1.3M	6,967	+4,207	add
308	STABLEFORD CAPITAL II LLC	$1.3M	6,904	−10	trim
309	Laird Norton Wetherby Trust Company, LLC	$1.3M	6,899	+79	add
310	Summit Trail Advisors, LLC	$1.3M	6,886	+1,485	add
311	BROWN ADVISORY INC	$1.3M	6,844	−347	trim
312	Ascent Group, LLC	$1.3M	6,836	+802	add
313	UNITED CAPITAL FINANCIAL ADVISORS, LLC	$1.2M	6,786	+6,786	new
314	Rockefeller Capital Management L.P.	$1.2M	6,761	+1,754	add
315	North Dakota State Investment Board	$1.2M	6,670	−905	trim
316	Osmosis Investment Management UK Ltd	$1.2M	6,652	+17	add
317	Kathmere Capital Management, LLC	$1.2M	6,643	+1,852	add
318	NICOLET BANKSHARES INC	$1.2M	6,516	+6,516	new
319	Callan Family Office, LLC	$1.2M	6,499	−2,496	trim
320	Sagewood Asset Management LP	$1.2M	6,493	+594	add
321	Savant Capital, LLC	$1.2M	6,479	+2,911	add
322	Advisors Asset Management, Inc.	$1.2M	6,431	+219	add
323	TOKIO MARINE ASSET MANAGEMENT CO LTD	$1.2M	6,428	+859	add
324	Ballentine Partners, LLC	$1.2M	6,350	+45	add
325	denkapparat Operations GmbH	$1.2M	6,338	0	no change
326	HUSSMAN STRATEGIC ADVISORS, INC.	$1.2M	6,300	+6,300	new
327	SCOTIA CAPITAL INC.	$1.2M	6,274	+6,274	new
328	MOGY JOEL R INVESTMENT COUNSEL INC	$1.1M	6,260	0	no change
329	Mediolanum International Funds Ltd	$1.1M	6,054	+6,054	new
330	Metis Global Partners, LLC	$1.1M	6,176	−1,035	trim
331	World Investment Advisors	$1.1M	6,082	−657	trim
332	MUFG Securities EMEA plc	$1.1M	6,017	0	no change
333	Bridgefront Capital, LLC	$1.1M	6,010	+6,010	new
334	ABN AMRO INVESTMENT SOLUTIONS	$1.1M	5,976	+1,150	add
335	Friedenthal Financial	$1.1M	5,930	+5,930	new
336	Kestra Advisory Services, LLC	$1.1M	5,810	+1,301	add
337	Dai-ichi Life Insurance Company, Ltd	$1.1M	5,808	−211	trim
338	HB Wealth Management, LLC	$1.0M	5,681	+1,011	add
339	Sanctuary Advisors, LLC	$1.0M	5,617	+445	add
340	SIG BROKERAGE, LP	$1.0M	5,500	−5,422	trim
341	GUARDIAN INVESTMENT MANAGEMENT	$1.0M	5,500	+100	add
342	Saudi Central Bank	$993K	5,415	+5,415	new
343	Wealthcare Advisory Partners LLC	$988K	5,389	+87	add
344	E Fund Management Co., Ltd.	$955K	5,209	—	no prior
345	Vise Technologies, Inc.	$953K	5,415	0	no change
346	INDEPENDENT FINANCIAL GROUP, LLC	$953K	5,198	—	no prior
347	Frank, Rimerman Advisors LLC	$952K	5,194	+12	add
348	Annis Gardner Whiting Capital Advisors, LLC	$952K	5,192	+2	add
349	Sterling Capital Management LLC	$942K	5,136	−3,525	trim
350	Taproot Management LP	$941K	5,133	+5,133	new
351	Vident Advisory, LLC	$935K	5,101	+896	add
352	Cannell & Spears LLC	$932K	5,083	+4	add
353	Unison Advisors LLC	$931K	5,078	0	no change
354	Bull Harbor Capital LLC	$931K	5,077	—	no prior
355	Empirical Finance, LLC	$929K	5,070	−6	trim
356	Birchview Capital, LP	$917K	5,000	+5,000	new
357	J. Safra Sarasin Holding AG	$915K	4,998	−1,476	trim
358	Plato Investment Management Ltd	$906K	4,939	0	no change
359	&PARTNERS	$893K	5,037	+752	add
360	Virtus Investment Advisers, LLC	$889K	4,848	+925	add
361	E. Ohman J:or Asset Management AB	$883K	4,819	−900	trim
362	BEESE FULMER INVESTMENT MANAGEMENT, INC.	$881K	4,803	+4,803	new
363	Holocene Advisors, LP	$879K	4,793	+4,793	new
364	Chicago Partners Investment Group LLC	$874K	4,598	+1,782	add
365	SUMMITRY LLC	$868K	4,737	−57	trim
366	Meeder Advisory Services, Inc.	$866K	4,721	+57	add
367	Arrowpoint Investment Partners (Singapore) Pte. Ltd.	$863K	4,706	+1,851	add
368	MAI Capital Management	$862K	4,702	+1,255	add
369	NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC	$861K	4,696	+9	add
370	COLDSTREAM CAPITAL MANAGEMENT INC	$855K	4,662	−120	trim
371	Private Advisor Group, LLC	$852K	4,649	−1,464	trim
372	SIGNATUREFD, LLC	$845K	4,608	+238	add
373	GILDER GAGNON HOWE & CO LLC	$836K	4,558	+4,558	new
374	EFG International AG	$817K	4,457	+1,822	add
375	Lido Advisors, LLC	$813K	4,432	−1,559	trim
376	TWIN CAPITAL MANAGEMENT INC	$812K	4,430	+4,430	new
377	Econ Financial Services Corp	$806K	4,397	+451	add
378	LBP AM SA	$801K	4,367	+4,367	new
379	TOCQUEVILLE ASSET MANAGEMENT L.P.	$798K	4,352	−1,117	trim
380	Jones Kertz & Associates, Inc.	$776K	4,231	−260	trim
381	STOREBRAND ASSET MANAGEMENT AS	$774K	4,223	—	no prior
382	Baird Financial Group, Inc.	$772K	4,213	+4,213	new
383	Allworth Financial LP	$772K	4,211	+725	add
384	INTECH INVESTMENT MANAGEMENT LLC	$750K	4,092	−1,450	trim
385	Beacon Pointe Advisors, LLC	$749K	4,083	+682	add
386	MUFG SECURITIES AMERICAS INC.	$745K	4,061	+109	add
387	Cohen Klingenstein LLC	$733K	4,000	0	no change
388	PINNACLE ASSOCIATES LTD	$733K	3,999	−156	trim
389	Texas Yale Capital Corp.	$731K	3,987	0	no change
390	SECURIAN ASSET MANAGEMENT, INC	$723K	3,945	0	no change
391	FARMERS & MERCHANTS INVESTMENTS INC	$723K	3,941	0	no change
392	Lombard Odier Asset Management (Switzerland) SA	$715K	3,899	+3,899	new
393	Savvy Advisors, Inc.	$708K	3,864	−385	trim
394	AlphaCentric Advisors LLC	$703K	3,835	+208	add
395	ELEVATION POINT WEALTH PARTNERS, LLC	$683K	3,724	+3,724	new
396	Bellevue Group AG	$670K	3,653	+88	add
397	XXI WEALTH, LLC	$669K	3,651	+1,136	add
398	Siemens Fonds Invest GmbH	$666K	3,633	+112	add
399	Avestar Capital, LLC	$661K	3,604	+69	add
400	Davis Investment Partners, LLC	$656K	3,580	−794	trim
401	CHESAPEAKE CAPITAL CORP /IL/	$650K	3,544	0	no change
402	EVOLVE PRIVATE WEALTH, LLC	$648K	3,536	+353	add
403	Ironwood Financial, llc	$648K	3,535	0	no change
404	Premier Path Wealth Partners, LLC	$646K	3,523	−2,207	trim
405	Hills Bank & Trust Co	$640K	3,490	−1,129	trim
406	Lifeworks Advisors, LLC	$635K	3,465	−468	trim
407	WINTON GROUP Ltd	$604K	3,297	−6,848	trim
408	SAX WEALTH ADVISORS, LLC	$586K	3,330	0	no change
409	Massachusetts Wealth Management	$583K	3,180	+181	add
410	Waverly Advisors, LLC	$578K	3,151	+358	add
411	RDA Financial Network	$573K	3,125	−75	trim
412	F/m Investments LLC	$571K	3,117	+652	add
413	EVERGREEN CAPITAL MANAGEMENT LLC	$565K	3,081	+493	add
414	NLB Skladi, upravljanje premozenja, d.o.o.	$560K	3,055	−18,952	trim
415	Sivia Capital Partners, LLC	$551K	3,003	+688	add
416	ROBERTS GLORE & CO INC /IL/	$550K	3,001	−80	trim
417	TRUST CO OF TOLEDO NA /OH/	$544K	2,965	+458	add
418	iSAM Funds (UK) Ltd	$535K	2,916	+2,916	new
419	Legacy Capital Group California, Inc.	$532K	2,901	+2,901	new
420	Bank Pictet & Cie (Europe) AG	$528K	2,880	−89	trim
421	HORIZON KINETICS ASSET MANAGEMENT LLC	$524K	2,857	−131	trim
422	Wedmont Private Capital	$523K	2,908	+115	add
423	Aprio Wealth Management, LLC	$522K	2,850	+900	add
424	CIM INVESTMENT MANAGEMENT INC	$519K	2,830	−14	trim
425	KCM INVESTMENT ADVISORS LLC	$514K	2,803	+4	add
426	Caerus Investment Advisors, LLC	$514K	2,801	+134	add
427	Uncommon Cents Investing LLC	$509K	2,779	0	no change
428	Empirical Financial Services, LLC d.b.a. Empirical Wealth Management	$504K	2,751	+533	add
429	Waterfront Wealth Inc.	$504K	2,747	−22	trim
430	Compound Planning, Inc.	$503K	2,742	−536	trim
431	OPPENHEIMER & CO INC	$499K	2,720	+2,720	new
432	CSS LLC/IL	$499K	2,720	−3,360	trim
433	SteelPeak Wealth, LLC	$496K	2,704	+2,704	new
434	ASSETMARK, INC	$493K	2,690	+298	add
435	Frec Markets, Inc.	$482K	2,628	+474	add
436	TEMA ETFS LLC	$482K	2,627	+7	add
437	Westside Investment Management, Inc.	$478K	2,637	+125	add
438	EAGLE GLOBAL ADVISORS LLC	$477K	2,600	0	no change
439	Pitcairn Wealth Advisors LLC	$475K	2,697	+132	add
440	Aljian Capital Management, LLC	$466K	2,540	+125	add
441	Clearstead Advisors, LLC	$463K	2,523	+274	add
442	PRUDENTIAL PLC	$460K	2,508	0	no change
443	DKRT Investments Corp.	$458K	2,500	0	no change
444	Atria Investments, Inc	$447K	2,437	−766	trim
445	Blackhawk Capital Partners, LLC	$445K	2,426	+339	add
446	TFB Advisors LLC	$444K	2,423	−25	trim
447	CHOREO, LLC	$436K	2,380	+3	add
448	PERSONAL CFO SOLUTIONS, LLC	$433K	2,362	−41	trim
449	PDT Partners, LLC	$430K	2,348	0	no change
450	CITIZENS FINANCIAL GROUP INC/RI	$430K	2,346	+549	add
451	Philip James Wealth Mangement, LLC	$426K	2,323	−5	trim
452	WADDELL & ASSOCIATES, LLC	$415K	2,264	+522	add
453	INCEPTIONR LLC	$412K	2,248	−2,628	trim
454	Concurrent Investment Advisors, LLC	$407K	2,222	−2,154	trim
455	Baker Avenue Asset Management, LP	$405K	2,207	+610	add
456	OPPENHEIMER ASSET MANAGEMENT INC.	$404K	2,204	−808	trim
457	Smartleaf Asset Management LLC	$399K	2,125	+273	add
458	NAVELLIER & ASSOCIATES INC	$397K	2,164	0	no change
459	SIMPLEX TRADING, LLC	$397K	2,164	−28,714	trim
460	Tower Research Capital LLC (TRC)	$396K	2,159	−1,672	trim
461	Simplicity Wealth,LLC	$394K	2,149	+197	add
462	Parcion Private Wealth LLC	$392K	2,140	+44	add
463	CIDEL ASSET MANAGEMENT INC	$390K	2,129	+190	add
464	DoubleLine ETF Adviser LP	$390K	2,125	+2,125	new
465	Evercore Wealth Management, LLC	$387K	2,112	−30	trim
466	B. Riley Wealth Advisors, Inc.	$387K	2,064	+68	add
467	SECTORAL ASSET MANAGEMENT INC	$386K	1,850	−305	trim
468	Capital Investment Advisors, LLC	$383K	2,087	+86	add
469	BSW Wealth Partners	$380K	2,074	+165	add
470	AGP FRANKLIN, LLC	$380K	2,073	+2,073	new
471	Procyon Advisors, LLC	$378K	2,063	+666	add
472	Richwood Investment Advisors, LLC	$373K	2,032	−90	trim
473	Northwest & Ethical Investments L.P.	$367K	2,000	0	no change
474	QTR Family Wealth, LLC	$356K	1,990	+138	add
475	SAGESPRING WEALTH PARTNERS, LLC	$351K	1,913	+659	add
476	Stratos Wealth Partners, LTD.	$351K	1,912	−13	trim
477	Persistent Asset Partners Ltd	$349K	1,903	−971	trim
478	Camelot Portfolios, LLC	$348K	1,900	0	no change
479	Forum Financial Management, LP	$346K	1,890	−3,997	trim
480	Resonant Capital Advisors, LLC	$344K	1,874	+190	add
481	FORBES J M & CO LLP	$343K	1,869	0	no change
482	FLPUTNAM INVESTMENT MANAGEMENT CO	$341K	1,861	−37	trim
483	Parkside Financial Bank & Trust	$340K	1,855	+84	add
484	Investors Research Corp	$339K	1,850	0	no change
485	WESTPAC BANKING CORP	$338K	1,843	−335	trim
486	Applied Finance Capital Management, LLC	$338K	1,842	+38	add
487	OSLO PENSJONSFORSIKRING AS	$337K	1,840	—	no prior
488	Everhart Financial Group, Inc.	$337K	1,838	+181	add
489	Colonial River Investments, LLC	$335K	1,830	−443	trim
490	EXCHANGE TRADED CONCEPTS, LLC	$334K	1,823	−261	trim
491	Brand Asset Management Group, Inc.	$333K	1,814	+1,814	new
492	VestGen Advisors, LLC	$331K	1,662	−5,222	trim
493	Trail Ridge Investment Advisors, LLC	$331K	1,807	0	no change
494	HANCOCK WHITNEY CORP	$328K	1,735	−5	trim
495	D'Orazio & Associates, Inc.	$326K	1,777	+1,777	new
496	Integrated Advisors Network LLC	$324K	1,767	−337	trim
497	UMB Bank, n.a.	$323K	1,762	+163	add
498	Abacus Planning Group, Inc.	$323K	1,760	−72	trim
499	Pure Financial Advisors, LLC	$316K	1,724	+551	add
500	Kera Capital Partners, Inc.	$316K	1,723	+58	add

Quarter ended 2026-03-31Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · BIIB

who in Congress disclosed purchases or sales beside which notable managers added or trimmed

Congress · last 90 days

Buyers: 2 Alan Armstrong R–OK, Gilbert Ray Cisneros, Jr. D–CA-31 $2K–$30K
Sellers: 2 Kevin Hern R–OK-1, Maria Elvira Salazar R–FL-27 $16K–$65K

filed 2026-06-16 → 2026-09-14 · totals are statutory ranges

Notable managers · quarter ended 2026-03-31

Adding: 1 Gotham Asset Management $54.7M held
Trimming: 1 Glenview Capital $10.5M held

new + add vs trim + exit, by shares · $ = reported value now, not the change · BIOGEN INC

Merged timeline of congressional filings and notable-manager moves on BIIB
Date	Who	Change	Size
2026-09-01	Kevin Hern Congress	Sale	$1K–$15K
2026-07-21	Alan Armstrong Congress	Purchase	$1K–$15K
2026-07-07	Maria Elvira Salazar Congress	Sale	$15K–$50K
2026-07-02	Gilbert Ray Cisneros, Jr. Congress	Purchase	$1K–$15K
2026-05-15	Gotham Asset Management 13F	add	+21,628 sh
2026-05-15	Glenview Capital 13F	trim	−233,586 sh

6 newest rows · Congress rows date by filing, 13F rows by quarter end · a 13F row is a quarter-end snapshot, not a trade

27 members of Congress disclosed BIIB — the congressional view ↗