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Biogen (BIIB) Institutional Ownership

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$253.40 +2.92 (+1.17%)
Closing price 04:00 PM Eastern
Extended Trading
$254.61 +1.21 (+0.48%)
As of 05:41 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Biogen (NASDAQ:BIIB)

Current
Institutional Ownership
Percentage
87.93%
Number of
Institutional Buyers
(last 12 months)
619
Total
Institutional Inflows
(last 12 months)
$42.46B
Number of
Institutional Sellers
(last 12 months)
303
Total
Institutional Outflows
(last 12 months)
$2.07B
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BIIB Institutional Buying and Selling by Quarter

Biogen Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/13/2026State Board of Administration of Florida Retirement System131,154$29.63M0.0%+8.1%0.089%
11/13/2026Essex Financial Services Inc.9,062$2.05M0.1%+745.3%0.006%
11/13/2026Lifeworks Advisors LLC2,848$643K0.1%-14.4%0.002%
11/13/2026BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp328,697$74.25M0.5%+1,392.7%0.222%
11/13/2026Gabelli Funds LLC1,761,706$397.93M2.6%+12,394.4%1.192%
11/12/2026Meeder Advisory Services Inc.22,898$5.17M0.2%+396.9%0.015%
11/12/2026First Trust Advisors LP797,004$180.03M0.1%+16.9%0.539%
11/12/2026Horizon Bancorp Inc. IN1,375$311K0.1%+41.3%0.001%
11/12/2026BNP Paribas82,282$18.59M0.4%+1,787.2%0.056%
11/12/2026Jackson Thornton Wealth Management LLC1,566$354K0.0%-14.4%0.001%
11/12/2026Horizon Kinetics Asset Management LLC2,464$557K0.0%-9.6%0.002%
11/12/2026Allianz SE5,053$1.14M0.0%+226.0%0.003%
11/12/2026State Street Corp136,622,812$30.86B0.9%+830.1%92.425%
11/12/2026Ilmarinen Mutual Pension Insurance Co261,333$59.03M0.4%+1,401.9%0.177%
11/12/2026Resona Asset Management Co. Ltd.716,848$161.92M0.8%+1,540.4%0.485%
11/12/2026E Fund Management Hong Kong Co. Ltd.22,162$5.01M1.2%+16,563.2%0.015%
11/12/2026Sumitomo Life Insurance Co.1,597$361K0.0%-3.1%0.001%
11/12/2026Whittier Trust Co.528$119K0.0%-24.5%0.000%
11/11/2026 Advisors Asset Management Inc.9,705$2.19M0.0%N/A0.007%
11/11/2026 Edmond DE Rothschild Holding S.A.37,707$8.51M0.1%-32.7%0.026%
11/11/2026 GW&K Investment Management LLC2,286$516K0.0%+898.3%0.002%
11/11/2026 Private Wealth Asset Management LLC2,270$564K0.0%+3,621.3%0.002%
11/11/2026 USS Investment Management Ltd395,613$89.36M0.4%+809.1%0.268%
11/11/2026 Westpac Banking Corp12,519$2.83M0.2%+579.3%0.008%
11/11/2026 Private Advisor Group LLC4,415$997K0.0%+75.9%0.003%
11/11/2026 Ieq Capital LLC107,450$24.27M0.1%-18.7%0.073%
11/11/2026 Focus Advisor Solutions LLC10,585$2.39M0.0%+37.7%0.007%
11/11/2026 Boston Partners901,213$203.56M0.2%-28.7%0.610%
11/11/2026 Independent Advisor Alliance1,388$341K0.0%+10.1%0.001%
11/10/2026 Meeder Asset Management Inc.1,771$400K0.0%+4,819.4%0.001%
11/10/2026 Composition Wealth LLC22,250$5.03M0.1%+1,465.8%0.015%
11/10/2026 Voya Investment Management LLC738,972$166.92M0.2%+199.4%0.500%
11/10/2026 Bogart Wealth LLC3,229$729K0.0%+1,367.7%0.002%
11/10/2026 Prasad Wealth Partners LLC1,553$351K0.1%+7.1%0.001%
11/10/2026 Public Sector Pension Investment Board2,466,095$557.04M1.2%+10,085.8%1.668%
11/10/2026 South Dakota Investment Council3,013$681K0.0%-6.2%0.002%
11/10/2026 Rothschild Investment LLC17,720$4.00M0.1%+547.0%0.012%
11/10/2026 Sompo Asset Management Co. Ltd.9,140$2.07M0.3%+6.3%0.006%
11/10/2026 Cibc World Market Inc.498,393$112.58M0.2%+6,613.3%0.337%
11/10/2026 Godfrey Financial Associates Inc.1,062$240K0.2%+7,485.7%0.001%
Uranium Mine Flood That Sparked a 2006 Price Surge Returns (Ad)

In 2006, a flooded mine at Cigar Lake sent uranium prices from the $50 range to $136 in eight months. This past May, flooding cut the supply route into the largest uranium complex on the planet, and in July Cigar Lake went down a second time. Gerardo Del Real calls this the Third Convergence Event and has backed three small companies positioned in front of it.tc pixel

See the three companies positioned for uranium's next supply shock
11/10/2026 Teachers Retirement System of The State of Kentucky186,189$42.06M0.3%+1,528.0%0.126%
11/10/2026 HighTower Advisors LLC61,753$13.95M0.0%+31.1%0.042%
11/10/2026 Western Wealth Management LLC1,047$237K0.0%-3.8%0.001%
11/9/2026 Bessemer Group Inc.51,241$11.57M0.0%+1,284.5%0.035%
11/9/2026 Hantz Financial Services Inc.16,368$3.70M0.0%+575.2%0.011%
11/9/2026 Harbour Investments Inc.18,357$4.15M0.1%+5,548.3%0.012%
11/9/2026 IFG Advisory LLC12,637$2.85M0.1%+786.8%0.009%
11/9/2026 Phoenix Financial Ltd.1,793$405K0.0%+23.1%0.001%
11/9/2026 Danske Bank A S1,363,909$308.08M0.6%+1,955.2%0.923%
11/9/2026 Dogwood Wealth Management LLC950$215K0.1%+47,400.0%0.001%
11/6/2026 Financial Freedom LLC151$34K0.0%N/A0.000%
11/6/2026 Aberdeen Group plc127,453$28.79M0.0%-0.6%0.086%
11/6/2026 Moors & Cabot Inc.1,729$391K0.0%+4.3%0.001%
11/6/2026 Citizens & Northern Corp9,249$2.09M0.5%+33.2%0.006%
11/6/2026 Allworth Financial LP181,185$40.93M0.1%+2,155.5%0.123%
11/6/2026 Fisher Asset Management LLC784,863$177.29M0.1%+132.2%0.531%
11/6/2026 Letko Brosseau & Associates Inc.145,750$32.92M0.4%-0.6%0.099%
11/6/2026 Russell Investments Group Ltd.2,175,055$491.30M0.4%+1,524.5%1.471%
11/6/2026 Eurizon Capital SGR S.p.A.286,567$64.73M0.2%+179.3%0.194%
11/6/2026 CENTRAL TRUST Co5,765$1.30M0.0%+3,271.3%0.004%
11/6/2026 Fifth Third Bancorp389,633$88.01M0.1%+1,086.4%0.264%
11/6/2026 New Mexico Educational Retirement Board130,556$29.49M0.7%+1,707.3%0.088%
11/5/2026 Maryland State Retirement & Pension System9,043$2.04M0.0%+15.3%0.006%
11/5/2026Jefferies Financial Group Inc.17,600$3.98M0.0%-35.9%0.012%
11/5/2026 First Command Advisory Services Inc.569$129K0.0%+191.8%0.000%
11/5/2026 Silver Grove Financial Group Inc.809$183K0.1%+1,551.0%0.001%
11/5/2026 Davis Investment Partners LLC3,104$701K0.2%-2.5%0.002%
11/5/2026 Turn8 Private Wealth Inc.13,932$3.15M2.1%+15.4%0.009%
11/5/2026 Illinois Municipal Retirement Fund665,893$150.41M1.7%+570.6%0.450%
11/5/2026 Moneco Advisors LLC9,804$2.22M0.1%+562.4%0.007%
11/5/2026 Lido Advisors LLC63,314$14.30M0.0%+1,096.4%0.043%
11/5/2026 Keybank National Association OH47,821$10.80M0.0%+515.1%0.032%
11/5/2026 D Orazio & Associates Inc.1,551$350K0.0%+4.7%0.001%
11/4/2026 Nemes Rush Group LLC490$111K0.0%+48,900.0%0.000%
11/4/2026 Alpha Family Trust11,700$2.64M1.2%+659.7%0.008%
11/4/2026 AEGON ASSET MANAGEMENT UK Plc195,359$44.13M0.5%-19.0%0.132%
11/4/2026 Leuthold Group LLC34,509$7.80M0.7%+9.6%0.023%
11/4/2026 Retirement Systems of Alabama557,499$125.93M0.4%+1,697.5%0.377%
11/4/2026 Clear Wave Wealth Management LLC1,722$389K0.1%+32.1%0.001%
11/4/2026 Fulcrum Asset Management LLP16,462$3.74M0.2%+964.8%0.011%
11/4/2026 Allspring Global Investments Holdings LLC138,456$31.27M0.0%+1,753.2%0.094%
11/4/2026 StoneRidge PMG Advisors LLC3,104$701K0.5%N/A0.002%
11/4/2026 Missouri Trust & Investment Co10,430$2.36M0.6%-3.4%0.007%
11/4/2026 Hager Investment Management Services LLC6,708$1.52M0.7%-9.1%0.005%
11/4/2026 Brighton Jones LLC7,723$1.75M0.0%-10.6%0.005%
11/4/2026 Candriam S.C.A.412,472$93.51M0.4%+7.3%0.279%
11/3/2026 Ethic Inc.349,961$79.05M0.9%+599.4%0.237%
11/3/2026 Pictet Asset Management Holding SA2,039,056$460.58M0.4%+139.4%1.380%
11/3/2026 AlphaCentric Advisors LLC4,092$924K0.8%+5.2%0.003%
11/3/2026 Parallel Advisors LLC26,640$6.02M0.1%+542.7%0.018%
Uranium Mine Flood That Sparked a 2006 Price Surge Returns (Ad)

In 2006, a flooded mine at Cigar Lake sent uranium prices from the $50 range to $136 in eight months. This past May, flooding cut the supply route into the largest uranium complex on the planet, and in July Cigar Lake went down a second time. Gerardo Del Real calls this the Third Convergence Event and has backed three small companies positioned in front of it.tc pixel

See the three companies positioned for uranium's next supply shock
11/3/2026 Abacus Wealth Partners LLC5,390$1.22M0.1%+12.1%0.004%
11/3/2026 Asset Dedication LLC1,496$338K0.0%+4,575.0%0.001%
11/3/2026 Alps Advisors Inc.26,548$6.00M0.0%+1,469.0%0.018%
11/3/2026 Providence First Trust Co4,697$1.06M0.4%+12.5%0.003%
11/3/2026 CenterBook Partners LP2,475$559K0.0%-76.2%0.002%
11/3/2026 Heritage Family Offices LLP4,218$953K0.3%N/A0.003%
11/3/2026 Allegiance Financial Group Advisory Services LLC913$206K0.0%-29.2%0.001%
11/3/2026 Calamos Advisors LLC35,599$8.04M0.0%+2.1%0.024%
11/2/2026 Westside Investment Management Inc.3,029$684K0.1%+15.0%0.002%
11/2/2026 Kestra Advisory Services LLC99,446$22.46M0.1%+1,516.0%0.067%


BIIB Institutional Ownership - Frequently Asked Questions

During the previous two years, 1,046 institutional investors and hedge funds held shares of Biogen. The most heavily invested institutionals were State Street Corp ($30.86B), BlackRock Inc. ($3.45B), Primecap Management Co. CA ($3.27B), Vanguard Group Inc. ($3.07B), Geode Capital Management LLC ($736.44M), Wellington Management Group LLP ($673.56M), and Public Sector Pension Investment Board ($557.04M).Learn more on Biogen's institutional investors.

87.93% of Biogen's stock is owned by institutional investors. Learn more on BIIB's institutional investor holdings.

Of the 948 institutional investors that purchased Biogen's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: State Street Corp ($122.25M), BlackRock Inc. ($15.99M), Primecap Management Co. CA ($15.15M), Norges Bank ($7.23M), Pacer Advisors Inc. ($2.78M), Public Sector Pension Investment Board ($2.45M), and Russell Investments Group Ltd. ($2.16M).

Institutional investors have bought a total of 193,498,102 shares in the last 24 months. This purchase volume represents approximately $42.46B in transactions.

Of the 292 institutional investors that sold Biogen's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Wellington Management Group LLP ($1.25M), Van ECK Associates Corp ($983.07K), Invesco Ltd. ($762.69K), Renaissance Technologies LLC ($761.01K), Pacer Advisors Inc. ($625.48K), Man Group plc ($578.74K), and UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC ($474.24K).

Institutional investors have sold a total of 11,599,042 shares in the last 24 months. This volume of shares sold represents approximately $2.07B in transactions.


Related Companies

Institutional ownership data for NASDAQ:BIIB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 11/13/2026. New 13F filings are added each quarter as they're published.
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