This press release, along with an earnings presentation and brief quarterly update, are available on our website, MSCI.com, under the Investor Relations tab. You'll find a reconciliation of our non-GAAP measures to the equivalent GAAP measures in the appendix of the earnings presentation. Important information regarding our use of operating metrics, such as run rate and retention rate, are available in the earnings presentation. Our attractive all-weather franchise, client centricity, and alignment with favorable long-term secular trends have positioned us to deliver on the long-term growth targets we have set for MSCI.
Since MSCI's IPO, a little over 18 years ago, we have achieved a compound annual growth rate of nearly 13% for total revenue, nearly 15% for adjusted EBITDA, and over 16% for adjusted EPS. In addition, we have now delivered 11 consecutive years of double-digit Adjusted EPS growth. In Q4, MSCI's operating metrics included net new subscription sales of $65 million and non-recurring sales of $31 million, bringing total net sales to over $96 million. Q4 was in fact our second-best quarter ever for recurring net new subscription sales, and we grew a growth rate of 18%.
Across MSCI, our retention rate was over 94% for the full year. Q4 showed how MSCI is using our deep-rooted competitive advantages to drive growth. In Q4, we delivered our best quarter ever for new recurring subscription sales in Index. Meanwhile, total ETF and non-ETF AUM linked to MSCI indices reached approximately $7 trillion, driven by record inflows into our clients' ETF products linked to MSCI indices, particularly listed ETFs products in Europe.