It's not every day you see the value of a $400 billion company jump 16%. But on Friday, Google (NASDAQ:GOOG)(NASDAQ:GOOGL) did just that after the search giant released solid second-quarter results. And if one thing seems sure, it's that no shareholders are quite as happy as co-founders Larry Page and Sergey Brin.

According to their most recent EDGAR filings, as of June 19, 2015 Page not only owned a whopping 21,996,904 class A shares of Google, but also 22,058,004 Class C shares. As of June 26, 2015, Brin held a mammoth 21,479,312 and 21,539,381 Class A and Class C shares of Google, respectively. So when both classes of Google stock skyrocketed more than 16% to a new all-time high on Friday, the value of their their shares collectively rose over $8.31 billion in a single day

Better yet for all Google shareholders, the big move came after watching shares trade sideways for the better part of a year, pushed Google stock to a new all-time high, and -- even after pulling back about 2.5% early Monday -- completely erased its recent under-performance relative to the broader market:

GOOG Chart

GOOG data by YCharts

Google's results were certainly impressive. Revenue for the second quarter climbed in line with analysts' expectations at 11% year over year (18% on a constant currency basis), to $17.73 billion. And earnings came in at $6.99 per share, compared to estimates for $6.75 per share and marking Google's first earnings beat so far in 2015. For that, Google investors can partly thank the company's core advertising business, particularly given strengths in mobile and programmatic advertising, as well as YouTube, where viewership grew at its fastest overall rate in two years at 60%. Collectively, Google's advertising businesses still represent more than 90% of total revenue. But revenue from Google's smaller "Other" segment unsurprisingly outpaced the rest, rising 17% year over year to $1.7 billion on another solid showing from the Google Play business.

What's more, Google's new CFO Ruth Porat made it clear the company is making a more conscious effort to balance capital expenditures and operating expenses with growth, lending credence to recent encouraging reports stating as much. Despite the fact Google ended the quarter with almost $70 billion in cash and equivalents while generating nearly $4.5 billion in free cash flow, this also eased investors' concerns of what some viewed in the past as haphazard spending outside of its crucial core markets.

Google's not done yet
Speaking of which, Google also suffers no shortage of intriguing long-term opportunities. And while the co-founders' recent windfalls are only gains on paper, I don't think they'll be selling anytime soon given their continued close involvement in Google's day-to-day operations. Today, Brin continues to direct special projects for the company he helped build, including those in its secretive "Google X" lab. Meanwhile, Page serves as Google's highly admired CEO, and was even described last year by Fortune Magazine as "The most ambitious CEO in the universe" for his insistence in focusing on potentially world-changing "moon shot" projects outside of Internet search, including self-driving cars and package delivery robots.

To be fair, Page has made it clear both Google X and the moon shot initiatives are long-term efforts, and require at least a 10-year time frame to have any meaningful impact on Google's top and bottom lines. But in the meantime, it's clear Google's core businesses are still enjoying solid growth and performing as well as they ever have. So while not every investor can expect to make over $8 billion a single day, I think Google stock still has more than enough momentum to handsomely reward patient shareholders going forward.

Steve Symington has no position in any stocks mentioned. The Motley Fool recommends Google (A shares) and Google (C shares). The Motley Fool owns shares of Google (A shares) and Google (C shares). Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.