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Calamos Wealth Management’s Biogen BIIB Stock Holding History

Calamos Wealth Management’s Portfolio BIIB Stock Details BIIB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$226K Buy
+1,046
New +$200K 0.01% 418
2024
Q3 		– Sell
-1,014
Closed -$235K – 318
2024
Q2 		$235K Buy
1,014
+13
+1% +$2.83K 0.01% 272
2024
Q1 		$216K Hold
1,001
– – 0.01% 280
2023
Q4 		$259K Hold
1,001
– – 0.02% 261
2023
Q3 		$257K Hold
1,001
– – 0.02% 274
2023
Q2 		$285K Buy
1,001
+1
+0.1% +$298 0.02% 265
2023
Q1 		$278K Hold
1,000
– – 0.02% 263
2022
Q4 		$277K Hold
1,000
– – 0.02% 270
2022
Q3 		$267K Sell
1,000
-17
-2% -$3.61K 0.02% 264
2022
Q2 		$207K Sell
1,017
-42
-4% -$8.59K 0.02% 300
2022
Q1 		$223K Buy
1,059
+42
+4% +$9.13K 0.02% 312
2021
Q4 		$244K Buy
+1,017
New +$261K 0.02% 301
2016
Q4 		– Sell
-2,277
Closed -$713K – 224
2016
Q3 		$713K Sell
2,277
-207
-8% -$61.3K 0.12% 165
2016
Q2 		$601K Sell
2,484
-186
-7% -$49K 0.11% 168
2016
Q1 		$695K Sell
2,670
-26
-1% -$6.87K 0.13% 171
2015
Q4 		$826K Sell
2,696
-896
-25% -$257K 0.16% 166
2015
Q3 		$1.05M Sell
3,592
-4,085
-53% -$1.35M 0.25% 133
2015
Q2 		$3.1M Buy
7,677
+1,937
+34% +$777K 0.73% 38
2015
Q1 		$2.42M Buy
5,740
+3,504
+157% +$1.38M 0.61% 51
2014
Q4 		$759K Sell
2,236
-39
-2% -$12.6K 0.22% 152
2014
Q3 		$753K Buy
2,275
+10
+0.4% +$3.3K 0.22% 149
2014
Q2 		$714K Buy
2,265
+40
+2% +$12K 0.2% 160
2014
Q1 		$681K Buy
2,225
+163
+8% +$51.7K 0.2% 158
2013
Q4 		$577K Sell
2,062
-50
-2% -$12.9K 0.18% 168
2013
Q3 		$508K Buy
2,112
+89
+4% +$19.9K 0.17% 168
2013
Q2 		$435K Buy
+2,023
New +$432K 0.15% 165

Other funds holding BIIB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Calamos Wealth Management's BIIB Position: Q2 2026 in Review

Calamos Wealth Management opened a new position in Biogen (BIIB) in Q2 2026: 1,046 shares worth $226K. The stake represents 0.01% of the portfolio and ranks #418 among its holdings. This is a return to the name: Calamos Wealth Management previously reported a position in BIIB as recently as Q2 2024.

Calamos Wealth Management first reported a position in BIIB in Q2 2013 and has held it in 26 quarters since. The position peaked at $3.1M in Q2 2015. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

  • Calamos Wealth Management held 1,046 shares of Biogen worth $226K as of Q2 2026.
  • Biogen was a new Calamos Wealth Management position in Q2 2026.
  • Biogen made up 0.01% of Calamos Wealth Management's portfolio in Q2 2026, its #418 holding.
  • Calamos Wealth Management first reported a position in Biogen in Q2 2013 and has held it in 26 quarters since.
  • Calamos Wealth Management's Biogen position peaked at $3.1M in Q2 2015.
  • 1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Calamos Wealth Management's 13F filing for Q2 2026, filed 31 Jul 2026.