Yes, but. Mueller made it crystal clear that he abided by the Department of Justice policy that a sitting president cannot be indicted -- or at least should not, because it basically gets in the way of running the country. That being said, take a look at footnote #1,091, which essentially invites to indict Trump once he's no longer in office.
The text in footnote 1091 on page 178 of the second volume reads:
A possible remedy through impeachment for abuses of power would not substitute for potential
criminal liability after a President leaves office. Impeachment would remove a President from office, but
would not address the underlying culpability of the conduct or serve the usual purposes of the criminal law.
Indeed, the Impeachment Judgment Clause recognizes that criminal law plays an independent role in
addressing an official’s conduct, distinct from the political remedy of impeachment. See U.S. CONST. ART.
I, § 3, cl. 7. Impeachment is also a drastic and rarely invoked remedy, and Congress is not restricted to
relying only on impeachment, rather than making criminal law applicable to a former President, as OLC
has recognized. A Sitting President’s Amenability to Indictment and Criminal Prosecution, 24 Op. O.L.C.
at 255 (“Recognizing an immunity from prosecution for a sitting President would not preclude such
prosecution once the President’s term is over or he is otherwise removed from office by resignation or
Also, there's a nugget on page 8 of volume II:
if we had confidence after a thorough investigation of the facts that the President clearly did not commit obstruction of justice, we would so state.
Edit: To reply to Fizz' and BobE's comments below. Rachel Maddow's April 18 and 19 episodes are interesting and instructive, as are a number of other sources, like Vox (e.g. their last The Weeds podcast and a few articles of them on the topic).
What Mueller's team did is basically say is that they cannot make a determination because of DOJ policy. This article from the Washington Post might be one of the best I read on the topic in that it spells out where the legal disagreement between Barr and Mueller resides, and explains how the latter went to great lengths to rebuke the former in his report, while letting the determination on Barr's end for political face keeping reasons. (Essentially, Barr would have overridden the decision had Mueller indicted Trump.)
Mueller's team basically deferred to Congress about the proper remedy (i.e. impeachment), and spelt out very precise descriptions that are indictments in all but form, in the name of making sure the record is kept. They also raised that a sitting president can be indicted after they no longer hold office, and investigated until then. And they raised to boot that had the president been innocent they would have exonerated him. To paraphrase Maddow's last episode (Apr 19), he basically served future prosectors a roadmap to land Trump in legal hell and likely jail (unless Trump does something until them.)