iShares NASDAQ Biotechnology Index shares owned by Chesley, Taft & Associates
Quarter-by-quarter ownership of iShares NASDAQ Biotechnology Index (IBB) shares owned by Chesley, Taft & Associates
from 13F filings
Historical chart of Chesley, Taft & Associates investment in iShares NASDAQ Biotechnology Index
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Quarterly reported holdings in iShares NASDAQ Biotechnology Index by Chesley, Taft & Associates
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $3.7M | 25k | 144.37 |
| 2025-06-30 | $3.2M | 26k | 126.51 |
| 2025-03-31 | $3.4M | 27k | 127.90 |
| 2024-12-31 | $3.5M | 27k | 132.21 |
| 2024-09-30 | $4.7M | 33k | 145.60 |
| 2024-06-30 | $4.5M | 33k | 137.26 |
| 2024-03-31 | $4.5M | 33k | 137.22 |
| 2023-12-31 | $4.4M | 32k | 135.85 |
| 2023-09-30 | $4.0M | 32k | 122.29 |
| 2023-06-30 | $4.1M | 33k | 126.96 |
| 2023-03-31 | $4.2M | 33k | 129.16 |
| 2022-12-31 | $4.4M | 34k | 131.29 |
| 2022-09-30 | $3.9M | 33k | 116.96 |
| 2022-06-30 | $3.9M | 33k | 117.64 |
| 2022-03-31 | $4.2M | 33k | 129.28 |
| 2021-12-31 | $4.8M | 32k | 152.61 |
| 2021-09-30 | $5.0M | 31k | 161.69 |
| 2021-06-30 | $5.1M | 31k | 163.65 |
| 2021-03-31 | $4.7M | 31k | 152.18 |
| 2020-12-31 | $5.7M | 38k | 151.48 |
| 2020-09-30 | $5.0M | 37k | 135.41 |
| 2020-06-30 | $5.2M | 38k | 136.70 |
| 2020-03-31 | $4.2M | 39k | 107.75 |
| 2019-12-31 | $4.7M | 39k | 120.51 |
| 2019-09-30 | $3.9M | 39k | 99.50 |
| 2019-06-30 | $4.3M | 39k | 109.10 |
| 2019-03-31 | $4.4M | 40k | 111.80 |
| 2018-12-31 | $3.9M | 40k | 96.43 |
| 2018-09-30 | $5.0M | 41k | 121.93 |
| 2018-06-30 | $4.4M | 40k | 109.81 |
| 2018-03-31 | $4.3M | 40k | 106.73 |
| 2017-12-31 | $4.4M | 41k | 106.78 |
| 2017-09-30 | $4.6M | 14k | 333.57 |
| 2017-06-30 | $4.3M | 14k | 310.09 |
| 2017-03-31 | $4.1M | 14k | 293.27 |
| 2016-12-31 | $3.8M | 14k | 265.37 |
| 2016-09-30 | $4.1M | 14k | 289.45 |
| 2016-06-30 | $3.7M | 15k | 257.35 |
| 2016-03-31 | $3.7M | 14k | 260.79 |
| 2015-12-31 | $4.9M | 14k | 338.31 |
| 2015-09-30 | $4.8M | 16k | 303.33 |
| 2015-06-30 | $5.8M | 16k | 368.97 |
| 2015-03-31 | $5.5M | 16k | 343.44 |
| 2014-12-31 | $5.3M | 18k | 303.34 |
| 2014-09-30 | $4.9M | 18k | 273.63 |
| 2014-06-30 | $4.6M | 18k | 257.04 |
| 2014-03-31 | $4.2M | 18k | 236.42 |
| 2013-12-31 | $4.1M | 18k | 227.06 |
| 2013-09-30 | $3.9M | 19k | 209.59 |
| 2013-06-30 | $2.8M | 16k | 173.89 |
| 2013-03-31 | $3.3M | 20k | 159.94 |
| 2012-12-31 | $2.8M | 21k | 137.24 |
| 2012-09-30 | $3.1M | 22k | 142.59 |
| 2012-03-31 | $2.7M | 22k | 123.30 |
| 2011-12-31 | $2.4M | 23k | 104.37 |
| 2011-09-30 | $2.2M | 24k | 93.34 |
| 2011-06-30 | $2.5M | 24k | 106.68 |
| 2011-03-31 | $2.4M | 24k | 100.17 |
| 2010-12-31 | $2.8M | 30k | 93.41 |
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