Thank you, Jess, and good morning, everyone. I'll quickly walk through the highlights for the fourth quarter, then turn the call over to our President, Jarrett Lilien, who'll provide a recap of 2020 and strategic plans for 2021. I'll provide an update on the expense guidance, and then turn it to Jono for his closing thoughts before we open the lines for Q&A.
So beginning on Slide 2. We ended the quarter with assets under management of $67.4 billion, up 11% from the third quarter from a combination of positive market movement and $900 million of net inflows. During the quarter, we experienced a continuing trend of strong flows of $1.4 billion into our ex state-owned strategies.
We took a $900 million into our currency hedged gold and Swiss-vaulted gold products. Also, continuing the trend all year were flows into our thematic funds. We generated $600 million across our cloud computing, battery technology and artificial intelligence funds. Given its strong rally, we also took in $50 million into our Bitcoin fund, bringing its AUM now to $165 million. The strong momentum we are experiencing exiting 2020 is continuing. Flows continue to remain strong taking in over $600 million and bringing our AUM to almost $70 billion.
Now turning to the financial results on Slide 3. Revenues were $67 million for the quarter, up 4% due to higher average AUM and a slight decrease in our fee capture due to mix change. On a GAAP basis, we had a net loss of $13.5 million. Excluding nonoperating items, adjusted net income was $9.2 million or $0.06 a share. This quarter, we took a noncash after-tax charge of $22 million for our future gold commitment payments, primarily due to a change in the discount rate we use to record this liability.
Turning to margins on the next slide. Our operating margin was 19.2%, reflecting higher seasonal expenses. Gross margins were 75.6% in the quarter, on the lower end of our guidance range as we incurred final costs related to passporting our funds into the EU due to Brexit and fund rebalancing fees in the U.S.
On the next slide, you can see the change in our expenses. Our operating expenses were $54 million in the quarter. Compensation costs increased, bringing our full year compensation to $74.7 million, below the low end of the range we gave at the beginning of the year. We also incurred higher marketing and sales-related spending, which generally picks up as compared to the summer months in the third quarter. For the full year, our discretionary spending was $41 million, also well below the guidance we gave at the beginning of the year.
Now I'd like to turn the call over to Jarrett Lilien.