Merger Arbitrage: 25% Upside
This is a merger arbitrage opportunity with a 25% spread and an expected closing during 2024. I am quite puzzled by such a wide spread and it feels like I might be missing an important risk. Any feedback on my research is welcome.
Matterport is a $1.4bn market cap company, which provides 3D capture software and hardware that allows users to create digital twins of physical real estate spaces – i.e. 3D models for apartments/houses in sales listings. The majority of the company’s revenue comes from subscriptions to its cloud platform, where images and spatial data of a physical space are converted into an interactive 3D model.
In late April, the company agreed to be acquired by CoStar Group (CSGP), a $34bn publicly listed real estate information and analytics provider which also operates several commercial and residential real estate listing sites, such as LoopNet, Apartments.com, and Homes.com. Merger consideration stands at $2.75/share in cash and $2.75/share in CSGP stock, or $5.5/share in total. That’s a 25% spread from the current prices. MTTR’s shareholder approval seems likely given that the offer comes at a gargantuan 200%+ premium to the pre-announcement levels and that 15% of shareholders are already in support of the merger. CSGP appears to be a very motivated buyer and I think the risk of the buyer walking away from the deal is minimal. The companies expect the transaction to close by the end of the year.
Aside from the steep potential downside to the pre-announcement levels, I believe the spread could be partially explained by a combination of:
- Somewhat more complicated structure of the merger consideration. The stock portion is subject to a collar. Any decline in CSGP stock below $77.42/share would result in a lower than $5.5/share merger consideration. However, CSGP shares would need to decline by more than 40% for this arb to start losing money. Also the stock portion of merger consideration could be easily hedged by shorting CSGP or buying put options (albeit option liquidity is quite low).
- Uncertainty surrounding antitrust approval, given that MTTR is the dominant player in the 3D imaging space, and that CSGP has already been under antitrust scrutiny over recent years.
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I will review these points in more depth below.
Rationale for the merger
CSGP has historically been focused on commercial real estate information and analytics. Over the last decade the company has also expanded into the real estate online marketplace business with a number of acquisitions, most notably LoopNet (2012, focused on commercial real estate listings) and Apartments.com (2014, residential rental listings). Since the acquisitions, CSGP has transformed both of these marketplaces into industry leaders.
From the Q4’20 conference call:
In the 3 years prior to CoStar Group acquiring LoopNet, revenues on average were negative 2.3% a year. In the past 2 years, LoopNet has grown almost 20% a year. And already, we have grown LoopNet’s revenue more than fourfold since acquisition. In the 3 years prior to acquiring Apartments.com, revenue grew at 7.7% a year on average. In the past 3 years, Apartments.com has grown almost 30% a year on average. Already, we have grown Apartments.com revenue by more than 6.5x.
From the Q1’24 conference call:
Three weeks ago on April 1, we celebrated the 10-year anniversary of CoStar’s acquisition of Apartments.com and what an amazing 10 years it’s been. We transformed the way consumers find their next rental home, growing our revenue from $75 million in 2014 to over $1 billion today. Our sales team is 5x larger, delivering 3,225% more sales than when we started. We went from fourth or fifth place in that industry in terms of traffic to the #1 traffic position with the brand most recognized by consumers.
More recently, CSGP has been pursuing a similar playbook with Homes.com, a residential for-sale listing-focused online marketplace acquired in 2021. Since the acquisition, Homes.com has been growing rapidly driven by investments primarily in marketing, allowing the business to overtake a number of competitors and establish itself as the #2 player behind Zillow. Management expects to increase investments in Homes.com further this year with c. $1bn to be invested in the residential marketplace business vs c. $0.5bn in 2023.
From a media article published in Nov’23:
“We’ve done this before, When we acquired LoopNet, we increased traffic 400%. When we acquired Land.com, we dramatically increased their traffic. When we bought Apartments.com, it was behind ForRent, it was behind Apartment Finder, it was behind Apartment Guide. It was behind Rent.com. It was behind Zillow and it was behind Craigslist. And over the course of two years, we worked on providing high-quality content and a better UX. We focused on SEO, SEM brand building, and we grew the Apartments.com traffic fivefold, then tenfold, and became the No. 1 player.”
The pending acquisition of MTTR fits the picture and will allow CSGP to boost its for-sale residential real estate marketplace business. MTTR is the dominant player in the 3D imaging space. Virtual tours created using MTTR’s hardware and software are published with the listings on the largest online real estate marketplaces in the US, including Zillow and Homes.com. The presence of virtual tours on listings correlates positively with view count and duration. CSGP intends to make MTTR’s 3D virtual tours exclusive to Homes.com. See quotes from CSGP’s conference call below.
We intend to add Matterport as one of the benefits of Homes.com membership. We believe adding 3D digital twins for Homes.com members will increase the leads we deliver, increase customer satisfaction, increase renewal rates, increase sales and increase site traffic further. We have thoroughly researched the many 3D digital twin solutions out there and have concluded that Matterport is the best solution for our clients’ needs.
[…]
In March this year, there were over 7.4 million views of Matterport 3D tours on Apartments.com. Visitors who interact with the Matterport on Apartments.com spend 16.6 minutes on the site, which is 134% more than the 7.1 minutes time on site if they do not interact with a Matterport. Properties with a Matterport generated 74 leads, which is 10x the 7 leads generated for a property without Matterport.
The point I’m trying to make here is that the acquisition of MTTR aligns very well with CSGP’s key strategy of growing Homes.com business and, for this reason, the likelihood of the buyer walking away should be minimal.
Merger consideration and hedging
Merger consideration is comprised of $2.75/share in cash and $2.75/share in CSGP stock. The stock portion is subject to a symmetrical collar based on CSGP’s 20-day VWAP three days before the transaction closing. Here’s how the stock exchange ratio will be calculated at different CSGP prices:
- Exchange ratio will be equal to $2.75 divided by the weighted average CSGP share price if CSGP stock price is between $77.42 and $94.62 per share (vs $78.2/share currently).
- 0.02906 CSGP shares if the average stock price is above $94.62.
- 0.03552 CSGP shares if the average stock price is below $77.42.
In terms of dollar value, the stock portion of merger consideration could fall below $2.75/share if CSGP shares trade below $77.42. CSGP is currently trading just above this level at $78, so there is a defintelly a risk that the total merger consideration will end up below the $5.5/share headline figure in dollar terms. However, CSGP stock would need to drop to $45/share (or down 40%+) for this arb to start losing money. Downward move in CSGP price can be easily hedgeable. There is also an added complexity due to timing difference – the 20-day weighted average CSGP price for exchange ratio determination will not necessarily match CSGP price at the time when the merger consideration is received. But this could also be addressed by adjusting the hedges after the exchange ratio becomes more clear.
There are several hedging options:
- Shorting CSGP (at a 0.03552x ratio) – this would fully protect from any downward moves in CSGP price but would leave arbitrageurs exposed CSGP shares spike upward. The return on this arb would decline to 14% at a $100 CSGP share price. Plenty of cheap CSGP borrow is available (at 0.3% annual fee).
- Buying CSGP $80 Jan’25 put options (currently at $7) – the premium paid for the option cuts into profits from this arb, but protects from negative CSGP price moves.
- Buying CSGP $75 Jan’25 put options (currently at $5.16) – same as above, just at the lower option exercise price and cost.
Calculations of returns for these hedging strategies at various CSGP prices are indicated in the table below.

Note that CSGP options are relatively illiquid and have wide bid/ask spreads. Other expiration dates (the merger might not close by Jan 2025) and exercise prices would deliver similar arbitrage returns, e.g. July 2025 options are c. 30% more expensive, so the upside would be cut by only an additional 1.5%.
Regulatory approval risk
CSGP has been under antitrust regulator scrutiny on several instances over the last few years:
- Back in 2020, CSGP’s acquisition of rental listing marketplace operator RentPath was called off after the FTC sued to block the transaction due to concerns of reduced competition in the online rental marketplace. The regulator highlighted that the combined company would have held dominant market share in certain sub-markets (e.g., a 70% share in the US apartment complexes with 200 or more units).
- Earlier this year, the FTC filed a brief regarding the ongoing legal proceedings between CSGP and another real estate online marketplace, CREXi. This came after CREXi had countersued CoStar for unfair and monopolistic behavior. The lower court eventually dismissed these claims, however, FTC pushed the court to investigate CREXi’s allegations.
Given this antitrust scrutiny, the market might be worried that FTC might challenge the pending transaction (I am just trying to guess reasons for the wide arb spread). The current merger is significantly larger than the previously-attempted CSGP-RentPath combination ($0.6bn vs. $1.6bn EV), but at the same time RentPath held a smaller market share in its market (16% according to this report) than MTTR does for 3D virtual tour rendering. However, FTC’s decision to sue CSGP’s acquisition of RentPath was based on horizontal competition concerns (i.e., RentPath and CSGP were two direct competitors with significant market shares), whereas CSGP/MTTR would be a vertical integration with CSGP being MTTR’s customer rather than a competitor. Vertical integrations are far harder for regulators to challenge.
As for the FTC’s brief in the CSGP-CREXi proceedings – the key aspect of that legal case revolved around antitrust issues in the commercial real estate sub-segment. Meanwhile, MTTR appears to be focused largely on residential real estate marketplaces, with less significant presence on the commercial side (see the quote below). Matterport highlighted that approximately 50% of its subscription revenues come from the residential real estate end-market. A large portion of the remaining subscription revenues are generated from non-real estate customers, suggesting that the revenue share attributable to the commercial real estate market is likely to be insignificant. From the Q4’23 conference call:
We’re most known for creating digital twins and virtual tours of residential real estate, so homes, apartments and the like. But we’ve also expanded to essentially be able to create a digital twin of any building. So commercial properties, apartment buildings, office high-rises, hotels, even in the industrial category, manufacturing facilities, factories and the like.
With my limited knowledge of regulatory concerns/approvals in similar instances, I find it hard to believe regulators would move to block this one, especially when MTTR is not the only game in town for virtual tour creation.
Matterport existing litigations
I took a deeper look into Matterport’s lawsuits after noticing that during merger negotiations CSGP initially wanted safeguards against potential litigation losses. The buyer offered to reduced cash consideration by the exposure from pending lawsuits and instead issue CVR, which would be contingent on successful litigation outcomes (see this S-4 filing). However, MTTR’s management quickly stated that no portion of the merger consideration should be contingent, and, in turn, CSGP promptly agreed to remove the CVR and leave the cash+stock consideration unchanged. This seems to display the acquirer’s view that any litigation losses are unlikely to be material.
My read of the merger agreement indicates suggest the same. Litigation outcomes are not included among material adverse effect clauses. The sole reference to the ongoing lawsuits is in the ‘Covenants and Agreements’ section of the contract, whereby MTTR is essentially only required to inform and consult with CSGP in case of any new developments – see excerpt from the merger agreement below:
Section 6.16 Certain Litigation. The Company shall promptly advise Parent of any Action commenced after the date hereof against the Company and/or any of its directors (in their capacity as such) by any Company stockholders (on their own behalf or on behalf of the Company) relating to this Agreement or the transactions contemplated hereby, and shall keep Parent reasonably informed regarding any such Action. The Company shall give Parent the opportunity to consult with the Company regarding, or participate in, the defense or settlement of any such Action, and shall give reasonable and good faith consideration to Parent’s advice with respect to such Action. The Company may not enter into any settlement agreement in respect of such Action against the Company and/or its directors or officers relating to this Agreement or any of the other transactions contemplated hereby without Parent’s prior written consent. In the event of, and to the extent of, any conflict or overlap between the provisions of this Section 6.16 and Section 6.3, this Section 6.16 will control.
Below is a list of lawsuits that Matterport is currently involved in:
- In Jul’21, MTTR was sued by former employee and stockholder William Brown, who claimed that invalid lock-up restrictions were imposed on his MTTR stock, preventing him from trading his shares. After an expedited trial in Dec’21, the court ruled in Jan’22 that the transfer restrictions did not apply. Subsequently, Matterport appealed, but the court upheld the ruling. The equity holder then filed an amended complaint in late 2022, claiming that MTTR did not register his requested share transfer on time. And finally, just last week (i.e. after the merger agreement was signed), the Delaware Court of Chancery issued a ruling in favor of the plaintiff, awarding the equity holder $79m plus interest in damages “as a result of his inability to trade his shares before the January 2022 post-trial opinion.” MTTR stated that it intends to appeal the ruling and unambiguously stated that the recent court award “does not impact the consideration expected to be paid to Matterport stockholders.”
- In Feb’24, MTTR was sued by two stockholders, claiming that management breached its fiduciary duties by issuing $225m worth of earn-out shares as part of the SPAC transaction in 2021. The plaintiffs have requested an award of damages as well as the replacement of the company’s management. This lawsuit is still in very early stages, and the outcome is not expected before closing of the merger.
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Matterport
MTTR went public via a SPAC in mid-2021. The company generates 60% of its revenue from subscriptions, with the rest coming from the sales of services and products, such as 3D cameras and motorized mounts for smartphones. MTTR has grown rapidly over recent years, displaying 16%-29% annual revenue growth during 2021-2023, while gross margins have generally stood above 40%. The company has so far been unprofitable and cash-burning, but management expects to reach breakeven at some point in late 2024 or 2025.


If the deal falls through, the downside (>50%) for MTTR is significant.
In recent deals subjecting to similar anti-trust risks and similar downside risks, what’s the average spread we are seeing?
How’s the timeline for anti-trust review for this merger?
The initial HSR review was scheduled to expire by yesterday.
Now that the HSR deadline has expired and no press release from Costar, does it mean that the antitrust risk is gone?
Normally the acquirer would issue a press release immediately to acknowledge the passage of the HSR deadline, right?
A complaint was filed by an investor/shareholder in MTTR in the U.S. District Court for the Northern District of California (Rose v. Matterport, Inc. et al), but so far there are no updates on the HSR review.
HSR/Antitrust issues are/were the main risk in my view, but it is becoming more obvious that I am just a tourist in this merger :-) I was sure that the HSR period would be extended. Then again, I was also confident that JetBlue and Spirit had better arguments, yet here we are.
I might be wrong here, but as far as I know, there’s no strict rule that says companies have to announce when the HSR review period ends. It’s actually pretty unusual for companies to make such announcements. So, the silence on this isn’t really something to worry about. Plus, since there hasn’t been any news about extending the review period either, it kind of looks like the antitrust risk is gone.
They pulled and refiled HSR, restarting the 30 day clock to avoid a 2nd request.
Where did you find that out?
Responding to Matt who asked “Where did you find that out?”
“The parties’ HSR notifications were filed with the FTC and the DOJ on May 3, 2024. Following discussions with the FTC, CoStar Group voluntarily withdrew its initial HSR Act notification and refiled a new HSR Act notification. The withdrawal and refiling are standard procedural steps that provide the FTC with additional time to complete its review of the proposed Mergers. The waiting period under the HSR Act is set to expire at 11:59 p.m., Eastern Time, on July 3, 2024.” – https://www.sec.gov/Archives/edgar/data/1057352/000119312524157598/d813688ds4a.htm
But you posted this information on June 6th and the registration statement amendment you reference was dated June 7th, filed June 10th. I was curious how you found the information a few days early.
What kind of antitrust risks could FTC see in this merger? Is this really the key reason for the wide spread? As per write-up my impression was that regulators would find it pretty difficult to object this transaction, mostly because this is a vertical integration and MTTR is far from the only game in town.
After the JetBlue/Spirit fiasco I am very careful – with the current administration there is *always* an antitrust risk and I see that as the key reason (and ofc the big downside), so only a small position till now. Also I see just small allocations in MTTR by the special sit funds I know, but that could be due to the fact that it is a busy period for special sits.
BTW I had asked Costar’s IR for clarification after the 30 days for the HSR review lapsed, but haven’t received confirmation, so they probably refiled as Chris wrote (BTW: Those who know, just know :-D).
” 70% share in the US apartment complexes with 200 or more units” may draw concerns.
Think Microsoft acquiring Activision; ATVI is not the only game in town either.
JetBlue/Spirit was merger of competitors. MSFT/ATVI was a $75bn deal.
MTTR acquisition by CoStar seems to be very different and way too small for regulators to be concerned from the vertical integration perspective. And then ”70% share in the US apartment complexes with 200 or more units” – is a very narrowly defined market.
If anyone has any notes from sell-side outlining the antitrust case, would appreciate if you could share.
The FTC blocked the sale of Propel Media (PROM) an $80 million company traded on the Expert Market. They are fanatics that have weaponized the antitrust laws.
I have to agree.
But let’s invert the question: what other risks are there to justify the spread?
CSGP looks like a good business with strong momentum, so the 40% decline in CSGP shares needed for this arb to start losing money may appear significant but it’s trading at 112x its FY24 non-GAAP earnings guidance midpoint ex-net cash, a third of which is stock comp expense.
A quick review of consumer posts and threads shows that at least consumers don’t see any serious alternatives to Matterport. Zillow has an in-house solution but it’s only on its site. Further, Matterport states: “We primarily compete with traditional methods of managing buildings and spaces, including 2D photography, paper-based building plans, labor-intensive computer-aided design drawings, and other static methods of visualizing and analyzing properties.” That sounds like no competition basically.
FTC is already extremely concerned about the apartment website market, having challenged the Rentpath deal (relevant market: ILS Advertising for Large Apartment Complexes). Now it can argue something like, Rentpath (owned by Redfin) and Costar are both Matterport customers and Matterport is likely very important to them. Costar’s been a customer for the past 9 years and if you open up the Rentpath sites like Rent.com or ApartmentGuide.com you’ll see Matterport is a key feature. Also, quoting Costar’s Founder & CEO (FTC already likes his exuberant statements): “Visitors who interact with the Matterport on Apartments.com spend 16.6 minutes on the site, which is 134% more than the 7.1 minutes time on site if they do not interact with a Matterport. Properties with a Matterport generated 74 leads, which is 10x the seven leads generated for property without Matterport.” Matterport is a critical input.
So Costar will use Matterport to foreclose on its closest competitor (input foreclosure). Behavioral remedies are out, as copied from Illumina/Grail-related materials: “A merger can be anticompetitive if it creates the incentive and ability to alter the terms of supply for a key input, even if it remains available to rivals”. The court accepted that a merger might allow a merged firm to engage in nuanced foreclosure strategies that can be anticompetitive, while also being hard to detect (e.g. reduction in the level or other terms of support or other services).
Then copy-paste its Rentpath complaint: The Acquisition would eliminate this sort of competition in consumer-facing content and features, and thus reduce the quality of ILS search services.
If the spread narrows to say <15% (in the future), I think the risk-reward ratio for shorting MTTR (betting that the deal will be called off) may become attractive.
If the deal collapses, MTTR will likely go below $2/share.
The merger proxy is out, and MTTR will hold a special meeting of its stockholders on July 26. Both parties currently believe they should be able to obtain all required regulatory clearances and approvals in a timely manner by the end of the year.
https://www.bamsec.com/filing/119312524158348?cik=1819394
The parties received a second request review from FTC on July 3. Meanwhile, earlier in June, the parties received a green light from regulators in the UK. Currently, the spread is at 25%.
“On July 3, 2024, Matterport and CoStar Group each received a request for additional information and documentary materials (the “Second Request”) from the Federal Trade Commission (the “FTC”) in connection with the FTC’s review of the Transaction. The effect of the Second Request is to extend the waiting period imposed by the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), until 30 days after Matterport and CoStar Group have each substantially complied with their respective Second Requests, unless that period is extended or terminated sooner by the FTC. Each of Matterport and CoStar Group expect to respond promptly to the Second Request and to continue to work cooperatively with the FTC in its review of the Transaction.”
https://www.bamsec.com/filing/181939424000048?cik=1819394
A question for dt and all you other arbs out there:
Given the odds of a Trump presidency seemingly very high now, why wouldn’t acquirors & acquirees just wait out the current admin for the next, more deal friendly, DoJ and FTC?
And shouldn’t deal odds, broadly speaking, reflect this? Have we seen any meaningful tightening of deal spreads recently?
As expected, MTTR’s shareholders have approved the transaction. The remaining spread is currently just over 22%.
Seems that the spread has narrowed down to 13% – haven’t seen any updates.
The Trump and Republican sweep has caused all merger spreads to narrow, including VZIO.
Seems that the merger is still ongoing. Antitrust review continues. Closing is expected Q4 2024 – Q1 2025. The remaining spread stands at around 13-14%.
“The completion of the transaction remains subject to the expiration or termination of the waiting period imposed by the Hart-Scott Rodino Antitrust Improvements Act of 1976, as amended, and the satisfaction or waiver of the other closing conditions specified in Matterport’s agreement with CoStar Group, Inc. The transaction is expected to close in the fourth quarter of 2024 or the first quarter of 2025.”
https://www.bamsec.com/filing/181939424000069?cik=1819394
Do we know when MTTR/CSGP have responded to FTC’s last Request?
No, haven’t been able to find it. The latest Q3 report still says that “Each of Matterport and CoStar Group expect to respond promptly to the Second Request and to continue to work cooperatively with the FTC in its review of the transaction.” Strange.
This is also relevant for the VZIO case. Can we draw a conclusion that merging parties will have to affirmatively disclose it in 10-Q/8-Ks if they’ve already responded to FTC/DOJ requests for info?
With the spread narrowed to <10%, I am thinking about turning the trade around and betting on a merger break instead.
The upside of a MTTR short can be very substantial and the maximum loss is less than 10%.
The same logic could apply to any merger. Do you really think the risk of regulatory block is that high?
This is not just any merger.
(1) The spread was very high until very recently. So at least it was considered by the market as very high risk, and I don’t see any significant changes since then other than the Trump victory.
(2) It’s been almost six months since they received the second request (July 3) from FTC, and there’s no updates.
(3) I think MTTR is the only game in town and the optics of this merger looks pretty bad.
The maximum loss could be much higher if CSGP surges.
It’s a hedged trade: short MTTR + long CSGP.
The spread on MTTR / CoStar has narrowed to 6%. Given the remaining regulatory uncertainty, potentially massive downside if the transaction fails, it doesn’t seem to be worth sticking around longer. By my count, the idea has delivered c. 15% for unhedged positions and around 20% with a short CSGP hedge.
I think 6% spread is a good starting point for shorting. Very asymmetric risk/reward.
The fate of the deal will now be decided by the new FTC chair, but I don’t think the “climate” for such “big tech” acquisitions will change drastically.
MTTR is halted but I don’t see any news, SEC filing or anything new on either Matterport or CoStar’s IR sites about the merger. Q4 results were just out and a Feb 26 PR still contained
“Transaction with CoStar Group, Inc.
Given the pending acquisition of Matterport by CoStar Group, Inc. that was announced on April 22, 2024, Matterport will not be holding a conference call or live webcast to discuss quarterly financial results. Also, in light of the pending transaction, the Company had previously suspended its financial guidance and will not be providing financial guidance for the upcoming fiscal quarter. At a special meeting of stockholders held on July 26, 2024, Matterport stockholders approved the transaction with CoStar Group, Inc. The completion of the transaction remains subject to the satisfaction or waiver of customary closing conditions specified in Matterport’s agreement with CoStar Group, Inc. The transaction is expected to close in the first quarter of 2025.”
https://www.sec.gov/Archives/edgar/data/1819394/000181939425000005/mttr425filing20250226forea.htm
MTTR/CSGP merger was completed on Feb 28.