Abrdn Life Sciences Investors
US ˙ NYSE ˙ US87911K1007

SecurityHQL / Abrdn Life Sciences Investors
InstitutionOppenheimer & Co Inc
Latest Disclosed Ownership17,494 shares
Latest Disclosed Value $ 284,627
Oppenheimer & Co Inc reports 59.18% increase in ownership of HQL / Abrdn Life Sciences Investors

On April 23, 2026 - Oppenheimer & Co Inc filed a 13F-HR form disclosing ownership of 17,494 shares of Abrdn Life Sciences Investors (US:HQL) valued at $284,627 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 10,990 shares of Abrdn Life Sciences Investors. This represents a change in shares of 59.18% during the quarter. The current value of the position is $296,173 USD.

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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-23 2026-03-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 17,494 6,504 59.18 285 54.35 0.0035
2026-02-02 2025-12-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 10,990 506 4.83 184 13.58 0.0026
2025-11-06 2025-09-30 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 10,484 -19,149 -64.62 163 -57.26 0.0020
2025-07-31 2025-06-30 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 29,633 920 3.20 380 4.12 0.0050
2025-04-23 2025-03-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 28,713 9,115 46.51 364 41.63 0.0055
2025-02-05 2024-12-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 19,598 0 0.00 257 -12.88 0.0038
2024-11-05 2024-09-30 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 19,598 -4,588 -18.97 296 -13.74 0.0045
2024-08-08 2024-06-30 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 24,186 5,772 31.35 343 36.80 0.0054
2024-05-07 2024-03-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 18,414 814 4.62 251 5.93 0.0042
2024-02-13 2023-12-31 13F ABRDN LIFE SCIENCES INVESTOR SH BEN INT 87911K100 17,600 0 0.00 237 7.76 0.0044
2023-11-08 2023-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 17,600 389 2.26 219 -6.01 0.0045
2023-08-03 2023-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 17,211 386 2.29 233 -0.43 0.0047
2023-05-10 2023-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 16,825 401 2.44 234 0.43 0.0050
2023-02-08 2022-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 16,424 22 0.13 233 3.56 0.0053
2022-11-14 2022-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 16,402 357 2.22 225 -1.32 0.0053
2022-08-08 2022-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 16,045 392 2.50 228 -11.97 0.0049
2022-05-12 2022-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 15,653 368 2.41 259 -12.20 0.0047
2022-02-02 2021-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 15,285 223 1.48 295 -5.75 0.0052
2021-11-12 2021-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 15,062 391 2.67 313 -0.32 0.0059
2021-08-03 2021-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 14,671 280 1.95 314 10.56 0.0056
2021-05-10 2021-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 14,391 -114 -0.79 284 -0.70 0.0057
2021-02-11 2020-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 14,505 282 1.98 286 14.40 0.0060
2020-11-13 2020-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 14,223 -10,679 -42.88 250 -44.07 0.0063
2020-08-11 2020-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 24,902 -447 -1.76 447 17.63 0.0116
2020-05-08 2020-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 25,349 1,640 6.92 380 -7.99 0.0115
2020-02-07 2019-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 23,709 231 0.98 413 16.34 0.0102
2019-10-31 2019-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 23,478 -6,782 -22.41 355 -30.39 0.0097
2019-08-09 2019-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 30,260 651 2.20 510 0.39 0.0139
2019-04-24 2019-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 29,609 529 1.82 508 15.72 0.0136
2019-01-29 2018-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 29,080 618 2.17 439 -24.57 0.0137
2018-10-26 2018-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 28,462 -1,195 -4.03 582 4.68 0.0148
2018-08-10 2018-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 29,657 1,897 6.83 556 4.12 0.0151
2018-05-01 2018-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 27,760 329 1.20 534 -0.74 0.0137
2018-02-07 2017-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 27,431 831 3.12 538 -5.94 0.0138
2017-11-09 2017-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 26,600 343 1.31 572 4.38 0.0153
2017-08-09 2017-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 26,257 482 1.87 548 9.82 0.0151
2017-05-15 2017-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 25,775 168 0.66 499 14.71 0.0141
2017-02-01 2016-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 25,607 748 3.01 435 -6.65 0.0127
2016-11-07 2016-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 24,859 -3,485 -12.30 466 -4.31 0.0136
2016-08-08 2016-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 28,344 547 1.97 487 -2.40 0.0145
2016-04-26 2016-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 27,797 1,544 5.88 499 -19.65 0.0152
2016-02-03 2015-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 26,253 -16,367 -38.40 621 -35.31 0.0185
2015-11-13 2015-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 42,620 671 1.60 960 -18.85 0.0292
2015-08-12 2015-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 41,949 -3,819 -8.34 1,183 -6.26 0.0329
2015-05-08 2015-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 45,768 276 0.61 1,262 11.48 0.0344
2015-02-10 2014-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT 87911K100 45,492 45,492 1,132 0.0325
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.