With just a few hours of trade left on Friday, the S&P/ASX 200 Index (ASX: XJO) is down 2.9% for the week despite the best efforts from these three surging ASX 200 stocks.

So, which companies have posted gains of 17% to 28% over the week despite the sinking market?

I'm glad you asked!

ASX 200 stocks bucking this week's broader market sell-off

The first ASX 200 stock making shareholders very happy this week is Nine Entertainment Co. Holdings Ltd (ASX: NEC).

Shares in the media and entertainment company closed last Friday trading for $1.50. At the time of writing, shares are changing hands for $1.75 apiece. That puts the Nine Entertainment share price up 16.7% over the week.

All of those gains are coming in today, with shares up 21.5%. This big lift is due to the fact that the ASX 200 stock is the controlling shareholder in property listings company Domain Holdings Australia Ltd (ASX: DHG).

And as The Motley Fool reported earlier today, Domain shares are up 40% in intraday at $4.36. That surge came after the company revealed it had received an unsolicited, non-binding indicative proposal from CoStar Group, Inc. (NASDAQ: CSGP) to acquire 100% of its issued capital by way of scheme of arrangement.

CoStar's offer stands at $4.20 cash per Domain share, valuing the company at $2.7 billion.

In a statement this morning, Nine Entertainment said:

Domain is of strategic importance to Nine's media ecosystem and our long-term growth strategy. Nine will consider the proposal with a focus on the best interests of Nine shareholders.

Which brings us to the second ASX 200 stock racing higher in this week's sinking market, Megaport Ltd (ASX: MP1).

Shares in the network-as-a-service solutions provider closed last Friday trading for $8.84 apiece and are currently changing hands for $11.22 apiece. This sees the Megaport share price up 26.9% over the week.

Most of those gains were delivered on Thursday when Megaport released its half-year results.

The ASX 200 stock closed up 19.5% yesterday after reporting an 18% year on year increase in annual recurring revenue to $226.6 million. Total revenue was up 12% to $106.8 million.

And gross profit for the six months increased by 12% to $74.7 million.

Megaport also grabbed investor interest with an upgraded FY 2025 revenue guidance. Management now forecasts full-year revenue will be in the range of $216 million to $222 million, up from prior revenue guidance of $214 million to $222 million.

Leading the pack

The top-performing ASX 200 stock on my list is A2 Milk Company Ltd (ASX: A2M).

A2 Milk shares closed out last week at $5.95 and are currently trading for $7.66 each. This sees the A2 Milk share price up 28.7% in a week.

The strong outperformance was spurred by A2 Milk's half-year results announcement on Monday.

The ASX 200 stock closed up 19.7% on the day after reporting a 10.1% year on year increase in revenue to NZ$893.8 million.

And with the company's net profit after tax (NPAT) for the six months up 7.6% to NZ$91.7 million, management declared A2 Milk's first-ever dividend of 8.5 New Zealand cents per share.

A2 Milk upgraded its full-year FY 2025 revenue growth guidance from mid-to-high single-digit growth to low-to-mid double-digit growth.