Abrdn Life Sciences Investors
US ˙ NYSE ˙ US87911K1007

SecurityHQL / Abrdn Life Sciences Investors
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Parallel Advisors, LLC ownership in HQL / Abrdn Life Sciences Investors

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 0 shares of Abrdn Life Sciences Investors (US:HQL) valued at $0 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 1,001 shares of Abrdn Life Sciences Investors. The current value of the position is $0 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (HQL) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

HQL / Abrdn Life Sciences Investors Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F inves CEF 87911K100 0 -100.00 0
2025-11-13 2025-09-30 13F inves CEF 87911K100 1,001 -3,828 -79.27 16 -75.41 0.0003
2025-07-08 2025-06-30 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 4,829 0 0.00 62 0.00 0.0012
2025-04-08 2025-03-31 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 4,829 -1,001 -17.17 61 -19.74 0.0014
2025-02-10 2024-12-31 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 5,830 0 0.00 76 -12.64 0.0017
2024-11-13 2024-09-30 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 5,830 0 0.00 88 6.10 0.0021
2024-08-08 2024-06-30 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 5,830 -4,429 -43.17 83 -41.01 0.0021
2024-05-06 2024-03-31 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 10,259 171 1.70 140 2.96 0.0038
2024-02-12 2023-12-31 13F ABRDN LIFE SCIENCES INVESTORS SH BEN INT CEF 87911K100 10,088 0 0.00 136 8.00 0.0040
2024-05-20 2023-09-30 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,088 82 0.82 126 -7.41 0.0042
2023-11-14 2023-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,088 82 126 0.0042
2024-05-20 2023-06-30 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,006 71 0.71 135 -2.17 0.0044
2023-08-04 2023-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,006 71 135 0.0044
2024-05-20 2023-03-31 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,935 75 0.76 138 -1.43 0.0047
2023-04-25 2023-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,935 75 138 0.0047
2023-02-06 2022-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,860 39 0.40 140 4.48 0.0061
2022-11-10 2022-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,821 0 0.00 134 -4.29 0.0062
2022-08-01 2022-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,821 0 0.00 140 -13.58 0.0064
2022-04-28 2022-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,821 0 0.00 162 -14.29 0.0064
2022-01-20 2021-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,821 -1,250 -11.29 189 -17.83 0.0070
2021-11-02 2021-09-30 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 11,071 0 0.00 230 -2.95 0.0093
2021-08-06 2021-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 11,071 0 0.00 237 8.72 0.0100
2021-04-23 2021-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 11,071 764 7.41 218 6.86 0.0103
2021-02-02 2020-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,307 0 0.00 204 12.71 0.0111
2020-10-27 2020-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,307 0 0.00 181 -2.16 0.0112
2020-07-16 2020-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 10,307 2,227 27.56 185 52.89 0.0121
2020-04-27 2020-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 8,080 0 0.00 121 -14.18 0.0098
2020-01-30 2019-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 8,080 0 0.00 141 15.57 0.0106
2019-11-01 2019-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 8,080 0 0.00 122 -10.29 0.0104
2019-08-05 2019-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 8,080 -1,250 -13.40 136 -15.00 0.0133
2019-05-01 2019-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,330 0 0.00 160 14.29 0.0180
2019-02-05 2018-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 9,330 -2,205 -19.12 140 -40.68 0.0195
2018-11-01 2018-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 11,535 4,207 57.41 236 72.26 0.0293
2018-07-30 2018-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 7,328 0 0.00 137 -2.84 0.0196
2018-05-08 2018-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 7,328 0 0.00 141 -2.08 0.0220
2018-02-13 2017-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 7,328 0 0.00 144 2.13 0.0236
2017-11-15 2017-09-30 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 7,328 4,828 193.12 141 161.11 0.0243
2017-08-07 2017-06-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 2,500 0 0.00 54 5.88 0.0102
2017-05-12 2017-03-31 13F/A-1 TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 2,500 0 0.00 51 21.43 0.0101
2017-05-12 2017-03-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 2,500 51
2017-02-14 2016-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF 87911K100 2,500 2,500 42 0.0099
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F TEKLA LIFE SCIENCES INVS SH BEN INT CEF Call 11,071 237 n/a n/a n/a
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.