CoStar Group (CSGP) Stock Analysis 2026: Why the CEO Is Buying the Dip

NASDAQ: CSGP
$48.91 +1.31 (+2.75%)
As of Mar-05-2026, 4:00 PM ET

CoStar Group is not a meme stock. It is not a biotech lottery ticket. It is not a “maybe this app goes viral” situation.

It is, instead, a real estate data empire with a near-monopoly feel in commercial property information, a fast-growing residential portal in Homes.com, and a management team that just started buying stock with real money. 🏢💻

That last part matters.

Because when a CEO buys during a drawdown, the message is simple:

“I’ve seen the internals. I know the bruises. And I still like the math.”

That’s what makes CSGP interesting in 2026.

1. The “Captain Buying in a Storm” Signal 🚢

The biggest catalyst here is not a press release. It’s not a PowerPoint. It’s not another conference call adjective.

It’s insider buying.

Recent purchases:

• CEO Andy Florance bought 55,720 shares at $44.52 for about $2.48M

• Fred Saint, President of Marketplaces, bought 20,000 shares at $45.33 for about $906K

Combined, that’s over $3.3 million in insider buying.

This is not token signaling. This is management saying the market may have become too pessimistic.

And importantly, this is a cluster buy — not one lonely executive tossing in a symbolic amount for optics.

In the FUNanc1al universe, cluster buys near lows get our attention.

2. Institutions Own… More Than Exists? 🐳

Now for one of those lovely stock-market absurdities.

Institutional ownership is reported at:

• 104.91% of shares outstanding

• 106.14% of float

Yes, more than 100%.

No, CoStar did not invent extra shares in a basement.

This usually happens because of short selling, share lending, and reporting lags. One share can effectively appear in more than one account snapshot.

The big takeaway is simpler:

Institutions absolutely love this stock.

Major holders include:

• Vanguard (owns 16.70% of shares outstanding)

• BlackRock (8.09%)

• BAMCO

• State Street

• Baillie Gifford

This is what I’d call Institutional Grade sponsorship. The big money is not casually nibbling here. They own the whole restaurant and most of the parking lot.

🔍 For CoStar Group (CSGP)'s Institutional Ownership breakdown, see here. 

3. Analysts Still See Big Upside 📈

Wall Street’s consensus is roughly Moderate Buy to Buy, with a price target around $73–$74.

From a recent price near $49, that implies 50%+ upside.

Not everyone agrees, of course. There are still holds and sells in the mix, which is actually healthy. A stock everyone loves is often overpriced. A stock with some skepticism can be more interesting.

The bullish analyst case centers on:

• dominant commercial real estate data

• Homes.com gaining share

• AI integration through Homes AI

• margin improvement as heavy spending moderates

So the market isn’t blind to the opportunity. It’s just not fully convinced yet.

That’s usually where the better setups live.

4. Little Drama From Shorts 😴

Short interest is only around 4.66%.

That’s not nothing, but it’s hardly a siege.

• Shares short: 19.34M

• Days to cover: 2.62

Translation:

There are some bears, but not enough to create a dramatic short-squeeze fantasy.

This is not a “powder keg” story.

This is more of a slow-burn re-rating story — if the company executes.

5. The Valuation Reset Is Real 💸

CSGP used to trade like a premium software darling.

Now?

It’s still not “cheap cheap,” but it is much cheaper than it used to be.

Some highlights:

• Forward P/E: down sharply to 35.34

• PEG ratio: 0.73

• Price/Sales: 6.34

• Price/Book: 2.46

That PEG ratio is especially interesting.

A PEG below 1 often suggests you are paying less than the growth rate might justify. It’s not a magic formula, but it’s one of the cleaner signals here.

Also notable: for a software-adjacent, data-rich, asset-light business, a P/B of 2.46 is unusually low.

The trailing P/E looks absurd, yes — but that’s distorted by acquisition costs from Matterport and Domain. Forward numbers tell the more useful story.

In plain English:

The market is still charging for quality — just not nearly as much as before.

6. Buybacks: Management Is Not Sitting on Its Hands 🔁

CoStar also plans to repurchase $700M of stock in 2026 under its existing $1.5B authorization.

It completed a $500M repurchase program in Q4 2025.

That matters for two reasons:

1. Management thinks the stock is worth buying here

2. Buybacks can quietly support the share count while sentiment remains weak

Insiders buying + company buying = much stronger signal than either one alone.

They are, quite literally, walking the talk.

7. Earnings: The Story Is Messy, But Still Good 🧾

2025 full-year revenue came in at $3.2B, up 19% year over year.

Q4 revenue was $900M, up 27%.

Adjusted EBITDA rose 83% to $442M.
Q4 adjusted EBITDA rose 58% to $177M.

Those are strong numbers.

Net income was weak on the surface, but again, acquisition costs muddy the picture. Adjusted earnings tell a healthier story.

The real strategic question is Homes.com.

Management spent heavily to build it into the #2 residential portal in the U.S., and the market hated the spending. Fair enough. Spending $850M on growth will do that.

But now the “heavy lifting,” as management puts it, may be behind them.

If Homes.com starts monetizing more efficiently while the commercial core remains dominant, the earnings acceleration story becomes much easier to believe.

And that’s exactly what the insider buys seem to be hinting at.

👉 Want the full picture? Dive into CoStar Group (CSGP)'s financials here.

The FUNanc1al Verdict 🎯

CoStar is a high-conviction recovery play.

You’re buying:

• a dominant commercial real estate data franchise

• a rapidly growing Homes.com platform

• AI upside through Homes AI

• insider confidence

• active buybacks

• a valuation that has finally come back to Earth

The risks are real:

• Homes.com execution risk

• competition with Zillow

• valuation still not “deep value”

• market impatience if margins don’t improve fast enough

But this is not a broken company.

It’s a strong company that spent aggressively, got punished, and is now trying to prove the long-term math still works.

That’s a very different situation.

And yes — the Homes.com ads featuring people trying to say it’s “the best” without legally saying it’s the best? Very silly. Very self-aware. Very FUNanc1al-approved. Morgan Freeman trolling the disclaimer process earns points here. 🎬😄

💡💡💡 Curious about another deep oil exploration play?
Check our take on UnitedHealth Group.

Quick Take / TL;DR

• CEO and another executive just bought $3.3M+ of stock

• Institutions own basically everything, plus apparently some imaginary shares

• PEG ratio under 1

• Buybacks remain active

• Revenue growth still strong

• Homes.com is the main swing factor

Bottom line: CSGP looks like a contrarian quality stock the market may be underpricing because of near-term spending pain.

FAQ

Why is insider buying important here?
Because it suggests management believes the stock is undervalued after the drawdown.

Why does institutional ownership exceed 100%?
Mostly due to short selling and reporting mechanics, not financial sorcery.

Is CoStar cheap?
Not traditionally cheap, but much cheaper than before — especially on PEG and price-to-book.

What’s the biggest risk?
Homes.com spending fails to generate the scale and profitability investors expect.

Food for Thought: The Cross-Hub Connection

Housing Hub: Homes.com is CoStar’s big consumer-facing bet, which makes this stock partly a play on the digitization of residential real estate discovery.

Tech Hub: Matterport + Homes AI show that this isn’t just a listings business — it’s becoming a data-and-AI workflow company for property markets.

Macro Hub: If rates stabilize and real estate activity improves, CoStar’s ecosystem becomes even more valuable.

About the Author

Frédéric Marsanne is the founder of FUNanc1al — part market analyst, part storyteller, part accidental comedian. A longtime investor, entrepreneur, and venture-builder across tech, biotech, and fintech, he now blends sharp insights with a twist of humor to help readers laugh, learn, live better lives, and invest a little wiser. When not decoding insider buys or poking fun at earnings calls, he’s building Cl1Q, writing fiction, painting, or discovering new passions to FUNalize.

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