CoStar Group (CSGP) Protective Put Calculator
Calculator · free · no signup · CSGPPrice a protective put, zero-cost collar, or put spread on CoStar Group. Annual cost, max loss, upside cap, tax treatment, auto-filled from current CSGP option chain.
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About CoStar Group
CoStar Group (CSGP) is a public Data company, incorporated in Delaware and headquartered in Arlington, VA.
Last close: $27.38 per share (as of 2026-10-03).
Equity grants at CoStar Group typically include restricted stock units (RSUs).
CoStar Group, Inc. is an American provider of information, analytics, and marketing services to the commercial property industry in North America and Europe. Founded in 1987 by Andrew C. Florance and based in Arlington, Virginia, the company operates the CoStar online database and news website and several online marketplaces, including Apartments.com and Homes.com.
Source: Wikipedia (CC BY-SA 4.0)
Andrew Florance founded the company in 1987 to build a commercial real estate database, and its research staff physically verifies property and lease data that is otherwise scattered and private. That proprietary collection is the moat: subscriptions to CoStar Suite are close to mandatory for brokers and appraisers. Apartments.com and, more recently, Homes.com extended the model into residential listings, funded by very large marketing campaigns. Residential expansion is the expensive bet on an established data business. Headquarters are in Arlington, Virginia.
Sources: sec.gov · en.wikipedia.org
Equity comp at CoStar Group
- In January 2026, CoStar Group adopted a new Executive Severance Plan covering officers at Vice President level and above. An involuntary termination alone provides base severance, but full equity (RSU) vesting acceleration applies only if the termination occurs during a defined change-in-control protection period, meaning acceleration requires both a change in control and a qualifying termination (double trigger), not a change in control alone. In February 2026, amid a proxy fight with activist investors, CoStar removed a clause that treated a majority change in the board's composition as a change in control, while leaving the double-trigger vesting mechanics unchanged.
- Early exercise is not allowed: you have to wait for shares to vest before you can buy them.
- RSUs use double-trigger vesting. Two things must both happen before the shares are yours: (1) the normal time-based vesting completes, and (2) the company has a liquidity event (an IPO or an acquisition). Until both happen, you do not yet own the shares and you do not owe tax on them.
Sources: sec.gov · sec.gov · stocktitan.net
Researched 2026-08-21.
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by CoStar Group.
A protective put caps your downside on the CSGP position at a chosen floor; a zero-cost collar pays for that floor by capping the upside. This calculator prices both structures off the current CSGP option chain, with annual cost, max loss, and tax-treatment notes.
Example: a 5,000-share CSGP position at $27.38 is worth $136,900. A 1-year 30%-OTM put on that position typically runs 2-4% of position value per year (about $2,738 to $5,476) before any premium offset from a short call. The calculator prices both structures off CSGP's current option chain so you see the actual cost for your chosen floor, tenor, and cap.
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CoStar Group equity questions
- How much does it cost to hedge CSGP stock?
- The cost of a protective put depends on how far below the current price you set the floor, how long the protection lasts, and CSGP's option-implied volatility. A zero-cost collar lowers that cost by selling away some upside. The calculator above prices both structures off the current CSGP option chain and shows the annual cost, maximum loss, and tax treatment.
- Does CoStar Group grant ISOs, NSOs, or RSUs?
- Equity compensation at CoStar Group typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
- Does CoStar Group allow early exercise of stock options?
- No. CoStar Group requires options to vest before you can exercise them, so the holding-period clock for long-term capital-gains treatment starts as each tranche vests and you exercise it.
- Do CoStar Group RSUs use double-trigger vesting?
- Yes. CoStar Group restricted stock units (RSUs) vest only when two things both happen: the time-based schedule completes, and the company has a liquidity event such as an initial public offering (IPO) or an acquisition. Until both occur you do not own the shares and owe no tax on them.
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