What brands of ladder DACs are R2R?

Could you please elaborate on which specific brands of ladder digital-to-analog converters (DACs) utilize the resistor-to-resistor (R2R) architecture? The R2R ladder DAC is a popular design choice for its precision and linearity in converting digital signals to analog. It would be insightful to know which manufacturers specialize in this technology, as their products could offer unique advantages in terms of audio quality, speed, or other performance metrics.