The good news is I found some nutritional data on the vitamin K content in pumpkins. The bad news is that it’s not specific – there’s no knowing currently the vitamin K content of a sugar pumpkin is different from a Blue Hubbard, Butternut Squash, cheese pumpkin, Jarrahdale, Kabocha… you get the idea. Canned pumpkin could be any combination of, along with preservatives and whatever else.
It’s really not that much more work to make your own, homemade pumpkin puree. Cut the pumpkin in quarters, scrape out the guts, roast for ~1 hour. Peel the skin off the flesh and toss it into the food processor with the rest of the ingredients.