IONIS PHARMACEUTICALS INC (IONS) Institutional Ownership

IONS is currently held by 3 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $215.50M based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026.

The largest disclosed holder is Tweedy, Browne Co All Funds (US), which reported ownership valued at approximately $170.88M in its March 31, 2026 13F filing. Based on current market prices and the latest disclosed share count, Tweedy, Browne Co All Funds (US)'s IONS position is now estimated to be worth approximately $169.10M, representing an estimated loss of -1.04% since the filing period.

Major shareholders tracked on this page include Tweedy, Browne Co All Funds (US), Renaissance Technologies LLC, ARK Invest, and other prominent asset managers. Collectively, these investors account for approximately 100% of the total disclosed value among the investors covered in this analysis.

This page tracks institutional holding trends, hedge fund exposure, portfolio concentration, historical 13F filings, and estimated holding performance to help investors analyze smart money sentiment toward IONIS PHARMACEUTICALS INC (IONS).

Institutional Ownership Trend

Portfolio quarterInstitutional holdersTotal reported valueTotal shares
Q1 20263$215,500,0752,869,890
Q4 20253$246,151,1843,111,505
Q3 20253$262,932,4624,019,145
Q2 20253$160,528,3494,062,980
Q1 20253$124,830,1414,137,559
Q4 20243$156,608,1054,479,637
Q3 20243$201,480,1305,029,459
Q2 20243$241,408,1605,065,215
Q1 20243$210,451,5835,034,242
Q4 20233$271,154,5515,472,146
Q3 20233$266,572,0866,146,340
Q2 20233$99,561,0456,333,989

Related IONS Institutional Insights: