Company: HQL
Filing Date: 2025-06-09
Form Type: N-CSRS
Source: 0001104659-25-057746
Chunk: 6

Company: abrdn Life Sciences Investors
Filing Date: 2025-06-09
Form: N-CSRS
Chunk 6
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| 2 | abrdn Life Sciences Investors |

Letter to Shareholders (unaudited) (concluded)

Contact Us:

| • | Visit: https://www.aberdeeninvestments.com/en-us/investor/investment-solutions/closed-end-funds |

| • | Email: Investor.Relations@aberdeenplc.com; or |

| • | Call: 1-800-522-5465 (toll free in the U.S.). |

Yours sincerely, /s/ Alan Goodson
Alan GoodsonPresident

{foots1} All amounts are U.S. Dollars unless otherwise stated.

| abrdn Life Sciences Investors | 3 |

Total Investment Return (unaudited)

The following table summarizes the average annual Fund performance compared to the Fund’s primary benchmark for the six-month (not annualized), 1-year, 3-year, 5-year and 10-year periods ended March 31, 2025.

|                            | 6 Months | 1 Year | 3 Years | 5 Years | 10 Years |
| Net Asset Value (NAV)      | -10.15%  | -2.54% | 3.21%   | 5.68%   | 2.98%    |
| Market Price               | -9.66%   | 6.76%  | 2.14%   | 6.84%   | 2.04%    |
| Nasdaq Biotechnology Index | -10.62%  | -3.39% | 1.46%   | 5.39%   | 2.30%    |

Performance of a $10,000 Investment (as of March 31, 2025) This graph shows the change in value of a hypothetical investment of $10,000 in the Fund for the periods indicated. For comparison, the same investment is shown in the indicated index. Returns represent past performance. Total investment return at NAV is based on changes in the NAV of Fund shares and assumes reinvestment of dividends and distributions, if any, at market prices pursuant to