Spencer R Berthelsen Net Worth

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Spencer R Berthelsen has an estimated net worth of at least $15.0 million*, as of June 24, 2026. They own 164,083 shares of IONS stock. They have sold 47,000 shares of IONS stock since 2021, for an estimated $2.4 million.

Spencer R Berthelsen $IONS SEC Form 4 Insider Trading

Spencer R Berthelsen has filed a total of 4 insider trades in $IONS since 2021. Their most recent trade was a sale of 8,000 shares, made on Jun 15, 2026. Their largest trade was a sale of 16,000 shares, made on Jun 17, 2024. We estimate that they now own 164,083 shares of $IONS, worth an estimated $12.6 million.

Insider Trading at $IONS

There have been a total of 308 insider trades reported at $IONS since 2021, with 20,000 shares purchased and 3.3 million shares sold. The most active insider traders in $IONS stock have been Brett P Monia, Eric Swayze, and Patrick R. O'Neil. The most recent trade was a sale of 5,635 shares reported by Joseph Baroldi (EVP, Chief Business Officer), made on Jun 26, 2026.

History of Insider Stock Trades by Spencer R Berthelsen

Company Ticker	Purchase / Sale	Shares	Date	Disclosed (EST)
IONS	Sale	8,000	Jun 15, 2026	June 16, 2026, 5:26 p.m.
IONS	Sale	8,000	Jun 01, 2026	June 3, 2026, 5:34 p.m.
IONS	Sale	16,000	Jun 17, 2024	June 20, 2024, 5:52 p.m.
IONS	Sale	15,000	Jun 23, 2021	June 24, 2021, 8 p.m.

$IONS Executives and Stock Owners with Insider Trades

Brett P Monia, Chief Executive Officer
Eric Swayze, EVP Research
Patrick R. O'Neil, EVP CLO & General Counsel
Joseph Baroldi, EVP, Chief Business Officer
Richard S Geary, EVP, Chief Development Officer
C Frank Bennett, EVP, Chief Scientific Officer
Shannon L. Devers, EVP, Chief Human Resources Ofc
Eugene Schneider, EVP, Chf Clinical Develop Ofcr
Elizabeth L Hougen, EVP, Finance & CFO
Brian Birchler, EVP, Corp and Development Ops
Onaiza Cadoret-Manier, EVP, Chf GL Pdt Str & Oper Ofc
Holly B. Kordasiewicz, EVP, Chief Development Officer
Kyle Jenne, EVP, Chf GL Pdt Str Ofcr

*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.