Between 2012 and 2026, when Uranus conjuncts Sedna, transiting Uranus will conjunct the natal Sedna of everyone alive.
Those born before the previous Uranus-Sedna conjunction in 1931 already had one Uranus-Sedna transit in their youth.
The attached chart shows the approximate timing of the Uranus-Sedna transit divided by age groups.
In 2012, Uranus from 8-12 degrees of Aries conjuncted the natal Sedna of people born between 1900 and 1912 (approximation based on Sedna and Uranus Rx dates and degrees).
This same group had a prior Uranus transit to their natal Sednas in 1929, when they were 19-29 years old. The second transit hit them around the ages of 100-112.
In 2013, Uranus from 12-16 Aries conjuncted the natal Sednas of those born from 1913 to 1926, ages 88-100. This group had also experienced a prior Uranus-Sedna transit around ages 2-17.
In 2014, Uranus conjuncted the natal Sedna of the next younger age group, and so on. Uranus (today at 03 Taurus 33) is currently conjuncting the Sednas of those born in the 1970’s, who are in their forties.
Uranus will continue to conjunct the natal Sedna of younger and younger age groups over the next 6-1/2 years until it conjuncts transiting Sedna on May 24th of 2026.
Julian Assange (07/03/1971, 3pm, Townsville, Australia) had his final Uranus-Sedna transit earlier this year (exact Jul 30 and Aug 15 of 2018 and Apr 22, 2019).
From Google:
Mark Zuckerberg’s (05/14/1984, 2:39pm, Dobbs Ferry, NY) Uranus-Sedna transit is approaching (exact May 21 and Nov 16, 2020 and Mar 11, 2021).
From http://www.forbes.com/profile/mark-zuckerberg/ :