MCF Advisors LLC reports 6.79% increase in ownership of BIIB / Biogen Inc.

바이오젠(주)

MX ˙ BMV ˙ US09062X1037

Security	MX:BIIB / Biogen Inc.
Institution	MCF Advisors LLC
Latest Disclosed Ownership	346 shares
Latest Disclosed Value	$ 63,433

On May 11, 2026 - MCF Advisors LLC filed a 13F-HR form disclosing ownership of 346 shares of Biogen Inc. (MX:BIIB) valued at $63,433 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 324 shares of Biogen Inc.. This represents a change in shares of 6.79% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-11	2026-03-31	13F	BIOGEN	COM	09062X103	346	22	6.79	63	10.53	0.0028
2026-02-11	2025-12-31	13F	BIOGEN	COM	09062X103	324	0	0.00	57	26.67	0.0032
2025-11-05	2025-09-30	13F	BIOGEN	COM	09062X103	324	0	0.00	45	12.50	0.0028
2025-07-15	2025-06-30	13F	BIOGEN	COM	09062X103	324	0	0.00	41	-9.09	0.0027
2025-05-06	2025-03-31	13F	BIOGEN	COM	09062X103	324	0	0.00	44	-10.20	0.0032
2025-01-17	2024-12-31	13F	BIOGEN	COM	09062X103	324	-6	-1.82	50	-22.22	0.0035
2024-10-24	2024-09-30	13F	BIOGEN	COM	09062X103	330	0	0.00	64	-17.11	0.0045
2024-08-05	2024-06-30	13F	BIOGEN	COM	09062X103	330	6	1.85	77	10.14	0.0058
2024-04-16	2024-03-31	13F	BIOGEN	COM	09062X103	324	-15	-4.42	70	-20.69	0.0054
2024-02-01	2023-12-31	13F	BIOGEN	COM	09062X103	339	-1	-0.29	88	0.00	0.0072
2023-10-19	2023-09-30	13F	BIOGEN	COM	09062X103	340	-37	-9.81	87	-18.69	0.0079
2023-07-24	2023-06-30	13F	BIOGEN	COM	09062X103	377	0	0.00	107	2.88	0.0097
2023-04-18	2023-03-31	13F	BIOGEN	COM	09062X103	377	120	46.69	105	46.48	0.0098
2023-01-31	2022-12-31	13F	BIOGEN	COM	09062X103	257	4	1.58	71	4.41	0.0073
2022-11-09	2022-09-30	13F	BIOGEN	COM	09062X103	253	0	0.00	68	30.77	0.0076
2022-08-11	2022-06-30	13F	BIOGEN	COM	09062X103	253	-6	-2.32	52	-5.45	0.0055
2022-05-05	2022-03-31	13F	BIOGEN	COM	09062X103	259	259		55		0.0052
2022-02-14	2021-12-31	13F	BIOGEN	COM	09062X103	0	-210	-100.00	0	-100.00
2021-11-12	2021-09-30	13F	BIOGEN	COM	09062X103	210	6	2.94	59	-16.90	0.0060
2021-08-10	2021-06-30	13F	BIOGEN	COM	09062X103	204	19	10.27	71	36.54	0.0073
2021-05-13	2021-03-31	13F	BIOGEN	COM	09062X103	185	0	0.00	52	15.56	0.0059
2021-02-09	2020-12-31	13F	BIOGEN	COM	09062X103	185	0	0.00	45	-13.46	0.0054
2020-11-12	2020-09-30	13F	BIOGEN	COM	09062X103	185	0	0.00	52	6.12	0.0069
2020-08-11	2020-06-30	13F	BIOGEN	COM	09062X103	185	0	0.00	49	-16.95	0.0068
2020-04-24	2020-03-31	13F	BIOGEN	COM	09062X103	185	0	0.00	59	7.27	0.0099
2020-02-07	2019-12-31	13F	BIOGEN	COM	09062X103	185	0	0.00	55	27.91	0.0084
2019-10-22	2019-09-30	13F	BIOGEN	COM	09062X103	185	0	0.00	43	0.00	0.0070
2019-08-06	2019-06-30	13F	BIOGEN	COM	09062X103	185	0	0.00	43	-2.27	0.0071
2019-05-07	2019-03-31	13F	BIOGEN	COM	09062X103	185	0	0.00	44	-21.43	0.0076
2019-01-25	2018-12-31	13F	BIOGEN	COM	09062X103	185	-20	-9.76	56	-22.22	0.0107
2018-10-24	2018-09-30	13F	BIOGEN	COM	09062X103	205	0	0.00	72	22.03	0.0126
2018-07-20	2018-06-30	13F	BIOGEN	COM	09062X103	205	-3	-1.44	59	3.51	0.0113
2018-05-10	2018-03-31	13F	BIOGEN	COM	09062X103	208	0	0.00	57	-13.64	0.0112
2018-02-06	2017-12-31	13F	BIOGEN	COM	09062X103	208	0	0.00	66	1.54	0.0122
2017-10-30	2017-09-30	13F	BIOGEN	COM	09062X103	208	20	10.64	65	27.45	0.0127
2017-07-25	2017-06-30	13F	BIOGEN	COM	09062X103	188	3	1.62	51	0.00	0.0101
2017-05-02	2017-03-31	13F	BIOGEN	COM	09062X103	185	0	0.00	51	-1.92	0.0107
2017-01-20	2016-12-31	13F	BIOGEN	COM	09062X103	185	0	0.00	52	-10.34	0.0114
2016-11-10	2016-09-30	13F	BIOGEN	COM	09062X103	185	0	0.00	58	28.89	0.0137
2016-08-11	2016-06-30	13F	BIOGEN	COM	09062X103	185	0	0.00	45	-6.25	0.0110
2016-05-04	2016-03-31	13F	BIOGEN	COM	09062X103	185	0	0.00	48	-15.79	0.0125
2016-02-08	2015-12-31	13F	BIOGEN	COM	09062X103	185	-147	-44.28	57	-41.24	0.0153
2015-11-09	2015-09-30	13F	BIOGEN	COM	09062X103	332	0	0.00	97	-27.61	0.0248
2015-07-24	2015-06-30	13F	BIOGEN	COM	09062X103	332	0	0.00	134	-4.29	0.0337
2015-04-29	2015-03-31	13F	BIOGEN	COM	09062X103	332	332	0.00	140		0.0349
2015-02-04	2014-12-31	13F	BIOGEN IDEC	COM	09062X103	0	-387	-100.00	0	-100.00
2014-10-24	2014-09-30	13F	BIOGEN IDEC	COM	09062X103	387	0	0.00	118	0.00	0.0348
2014-07-29	2014-06-30	13F	BIOGEN IDEC	COM	09062X103	387	-46	-10.62	118	-10.61	0.0372
2014-05-13	2014-03-31	13F	BIOGEN IDEC	COM	09062X103	433	0	0.00	132	0.00	0.0444
2014-10-28	2013-12-31	13F	BIOGEN IDEC	COM	09062X103	433	33	8.25	132	8.20	0.0467
2014-10-27	2013-09-30	13F	BIOGEN IDEC	COM	09062X103	400	0	0.00	122	0.00	0.0673
2014-10-27	2013-06-30	13F	BIOGEN IDEC	COM	09062X103	400	0	0.00	122	0.00	0.0734
2014-10-27	2013-03-31	13F	BIOGEN IDEC	COM	09062X103	400	0	0.00	122	0.00	0.0702
2014-11-03	2012-12-31	13F	BIOGEN IDEC	COM	09062X103	400	0	0.00	122	0.00	0.0740
2014-11-03	2012-09-30	13F	BIOGEN IDEC	COM	09062X103	400	0	0.00	122	0.00	0.0795
2014-10-31	2012-06-30	13F	BIOGEN IDEC	COM	09062X103	400	-61	-13.23	122	-13.48	0.0739
2014-10-31	2012-03-31	13F	BIOGEN IDEC	COM	09062X103	461	21	4.77	141	4.44	0.0866
2014-11-03	2011-12-31	13F	BIOGEN IDEC	COM	09062X103	440	440		135		0.0916

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.