PSX Market Cap History
Below is a table of the PSX market cap history going back to 4/30/2012:

Date PSX Market Cap
4/30/201221.29B
6/30/201220.84B
9/30/201229.02B
1/31/201337.64B
3/31/201343.33B
6/30/201336.00B
9/30/201334.67B
1/31/201442.95B
3/31/201443.60B
6/30/201444.95B
9/30/201445.01B
1/31/201538.22B
3/31/201542.57B
6/30/201543.31B
9/30/201540.99B
1/31/201642.28B
3/31/201645.51B
6/30/201641.48B
9/30/201641.95B
1/31/201742.26B
3/31/201740.89B
6/30/201742.30B
9/30/201746.42B
1/31/201851.33B
3/31/201844.68B
6/30/201852.14B
9/30/201851.98B
1/31/201943.40B
3/31/201943.16B
6/30/201941.96B
6/28/20175.69B
9/30/201945.50B
1/31/202040.15B
3/31/202023.43B
6/30/202031.40B
9/30/202022.64B
1/29/202129.62B
3/31/202135.70B
6/30/202137.59B
9/30/202130.68B
1/31/202237.18B
3/31/202241.56B
6/30/202239.44B

Also see: PSX Shares Outstanding History
and PSX YTD Return
PSX Historical Market Cap:
+6.25% CAGR
PSX Historical Market Cap: +6.25% CAGR

Mouse over chart for data details
4/30/2012 ...6/30/2022
Phillips 66 is an energy manufacturing and logistics company with midstream, chemicals, refining, and marketing and specialties businesses. Co.'s segments include: Midstream, which provides crude oil and refined petroleum product transportation, terminaling and processing services, as well as natural gas and natural gas liquids transportation, storage, processing and marketing services; Chemicals, which manufactures and markets petrochemicals and plastics on a worldwide basis; Refining, which refines crude oil and other feedstocks into petroleum products; and Marketing and Specialties, which purchases for resale and markets refined petroleum products, mainly in the U.S. and Europe. We show 43 historical shares outstanding datapoints in our PSX shares outstanding history coverage, used to compute PSX market cap on those dates.

Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing PSX market cap history over the course of time is important for investors interested in comparing PSX's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of PSX versus a peer is one thing; comparing PSX market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like PSX can fluctuate over the course of history. With this page we aim to empower investors researching PSX by allowing them to research the PSX market cap history.
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Phillips 66 (PSX) is categorized under the Energy sector; to help you further research historical market cap numbers, below are some other companies in the same sector:

PSXP Market Cap History
PTEN Market Cap History
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