SEC 13F Intelligence

Rtw Investments, LP / RARE

Rtw Investments, LP’s Ultragenyx Pharmaceutical In Position

Does Rtw Investments, LP own Ultragenyx Pharmaceutical In (RARE)? Yes — 3.65M shares worth $76M (+0.76% of its 13F portfolio) as of Q1 2026, up from 3.00M shares the prior filed quarter.

Position Value
$76M
Q1 2026
Shares
3.65M
% of Portfolio
+0.76%
Quarters Held
18
currently held

Position History RARE

Reported value by quarter
Q4 ’21: $115MQ4 ’21Q1 ’22: $100MQ2 ’22: $82MQ3 ’22: $98MQ3 ’22Q4 ’22: $184MQ1 ’23: $171MQ2 ’23: $249MQ2 ’23Q3 ’23: $193MQ4 ’23: $329MQ1 ’24: $331MQ1 ’24Q2 ’24: $134MQ3 ’24: $109MQ4 ’24: $83MQ4 ’24Q1 ’25: $62MQ2 ’25: $62MQ3 ’25: $98MQ3 ’25Q4 ’25: $69MQ1 ’26: $76Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 20263.65M$76M+0.76%
Q4 20253.00M$69M+0.69%
Q3 20253.26M$98M+1.21%
Q2 20251.71M$62M+0.88%
Q1 20251.71M$62M+0.95%
Q4 20241.97M$83M+1.25%
Q3 20241.97M$109M+1.58%
Q2 20243.26M$134M+2.07%
Q1 20247.09M$331M+4.88%
Q4 20236.89M$329M+5.14%
Q3 20235.41M$193M+4.07%
Q2 20235.41M$249M+4.75%
Q1 20234.27M$171M+3.57%
Q4 20223.97M$184M+3.75%
Q3 20222.36M$98M+2.25%
Q2 20221.37M$82M+2.12%
Q1 20221.37M$100M+2.06%
Q4 20211.37M$115M+1.69%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Rtw Investments, LP’s full portfolio or all institutional holders of RARE.