https://trackandfieldnews.com/discussion/showthread.php?153585-sub-2-sub-4-sub-8-30-sub-15-womenYMMV wrote:
She seems perfect for the sub- 2:00/4:00/15:00 club. I'm only certain of Slaney and Rowbury for that one. It's a toughie, even Jenny MF Simpson hasn't made it.
Genzebe Dibaba 1:59.37, 3:50.07, 8:16.60i, 14:18.86i
Laura Muir 1:58.69, 3:55.22, 8:26.41i, 14:49.12i
Maryam Jamal 1:57.80, 3:56.18, 8:28.87, 14:51.68
Sifan Hassan 1:56.81, 3:56.05, 8:28.90, 14:41.24
Shannon Rowbury 1:59.97, 3:56.29, 8:29.93, 14:38.92
Klosterhalfen 1:59.65, 3:58.92, 8:29.89, 14:51.38
Faith Kipyegon: 1:58.02-3:56.41-8:23.55-14:31.95
Mentioned in the linked thread as "close" are Obiri and Simpson. Klosterhalfen was the youngest to achieve this (at 20), Hassan has a better 3k time by now, I am too lazy to correct that because it does not matter.
There are a few more if you scratch the 3k and especially if you scratch the sub 2.
Houlihan should easily be able to run sub 2.