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Jeremy Grantham's Ionis Pharmaceuticals, Inc. (IONS) position

Not anymore: Jeremy Grantham fully exited IONS in Q1 2023. The position peaked at $366K in Q4 2022.
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Value at exit
$366K
Shares at exit
10K
Est. average buy price (i)
$42.06
Quarter-end price
$37.77

Estimated trade prices

Average price in quarters with purchases
$42.06

IONS price vs Grantham's position

1Y 3Y 5Y MAX
Dates
$20$50$10020222023202420252026New position of 10K shares · Q4 2022. Average closing price $42.06 · Price range $37.12–$46.5210Ksharespurchased
Average closing price · filing quarter
$42.06
Price range · filing quarter
$37.12 – $46.52
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2023 Exited −10K −$364K −100.0% 0 May 12, 2023
Q4 2022 New +10K +$408K – 10K Feb 13, 2023
Data through Q1 2023 · filed May 12, 2023
2 grouped rows from 2 quarters

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Common questions

Does Jeremy Grantham own IONS?

Not currently. Jeremy Grantham fully exited IONS in Q1 2023, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jeremy Grantham buy IONS?

Jeremy Grantham first disclosed a IONS position in Q4 2022; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jeremy Grantham sell IONS?

Yes. Jeremy Grantham reduced and then fully exited IONS by Q1 2023; the reductions are in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of IONS does Jeremy Grantham own?

None as of the latest filing: Jeremy Grantham has exited IONS. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jeremy Grantham pay for IONS?

Jeremy Grantham's estimated average buy price for IONS is $42.06, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.