Charles River Laboratories (CRL) RSU sell-vs-hold

Calculator · free · no signup · CRL

Sell at vest or hold? Compare after-tax payout from selling Charles River Laboratories RSUs at vest vs. holding through the LTCG cliff at 12 months.

Beta · invite-only · AlphaLatitude Inc. · Free Tools

Your vest

pre-IPO? enter price manually

Tax inputs

Hold strategy

1 yr
20%
20%
10.0%

Best after-tax payout — at year 1 yr

$47,709

Sell + invest wins by $4,981 over Hold 1 yr.

Estimates only. Not financial advice.

This vest pushes your top federal rate from 24% to 35%. Hover the Federal value below for the bracket-by-bracket slicing.

Heads-up: under-withholding. Your employer withholds federal tax at the IRS supplemental rate (22.0% on this vest, ≈ $17,600). Your marginal federal rate on this vest is 32.7%, owing $26,171. Expect to settle the $8,571 gap at tax time.

The hidden purchase

Tax was paid at vest either way. Holding is mathematically equivalent to taking $44,509 in after-tax cash and buying $44,509 of CRL today.

Most diversification frameworks would advise against a purchase that size in a single name; the right answer depends on your conviction in CRL. Holding past one year converts the gain to LTCG.

Sell + invest

Best payout
Vest value (shares × price)$80,000
Federal
State
Medicare−$1,160
Additional Medicare−$720
Market gain over 1 yr at 10.0%$4,451
Cap-gain tax on diversified gain — LTCG (federal + state + NIIT)−$1,251
Net at year 1 yr$47,709

Sell every share at vest; invest the after-tax cash at the market return for 1 yr, then liquidate. Diversified — no single-stock concentration risk.

Hold 1 yr

Vest value (shares × price)$80,000
Vest tax (federal + state + FICA)
Net at year 1 yr$42,728

Sold 444 shares to cover vest tax (net-settled); kept 556 shares 1 yr to qualify for long-term capital gains.

Social Security + Medicare are payroll taxes (collectively called FICA) — they apply because you're still employed at vest.

Both columns are stated in year-1 yr dollars. The sell side compounds at the market return; the hold side compounds at your single-stock expected return after a 20% volatility drag.

Estimates only. Assumes net-settled (sell-to-cover) vesting; double-trigger and pre-IPO RSUs are out of scope. Excludes multi-state moves, AMT interactions on other equity, and 83(b) elections. Not financial advice.

You evaluated one RSU vest. The beta plans every vest of every grant across years, with concentration and AMT in the loop.

Request beta access →

Related calculators: RSU Lot Order Calculator · Stock Concentration Calculator

About Charles River Laboratories

Charles River Laboratories (CRL) is a public Other company, headquartered in Wilmington, MA.

Equity grants at Charles River Laboratories typically include restricted stock units (RSUs).

Charles River Laboratories International, Inc. is an American pharmaceutical and biotechnology contract research organisation (CRO) headquartered in Wilmington, Massachusetts, United States. Founded in 1947, the company provides preclinical and clinical laboratory services for the development of new drugs, vaccines, and medical devices. Its operations span at least 20 countries, offering research models, safety assessment, and manufacturing support services to pharmaceutical, biotechnology, and government clients.

Source: Wikipedia (CC BY-SA 4.0)

Henry Foster founded the company in 1947 in a Boston building above a river, breeding laboratory rats. It now supplies research models and preclinical services that drug developers use before human trials, including safety assessment, discovery services, and manufacturing support for cell and gene therapy. Its horseshoe crab lysate business for endotoxin testing has drawn conservation scrutiny. Demand tracks biotech funding, which made the venture capital contraction after 2022 a direct headwind. Headquarters are in Wilmington, Massachusetts.

Sources: criver.com · en.wikipedia.org

Equity comp at Charles River Laboratories

  • RSUs use single-trigger vesting: shares become yours as each portion vests on schedule, and the value is taxed as ordinary income at that point. No IPO or acquisition is required.

Researched 2026-08-17.

OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Charles River Laboratories.

Charles River Laboratories (CRL) RSUs vest as ordinary income at the price on vest day. The decision is whether to sell at vest and reinvest, or hold the shares through the 12-month LTCG cliff. This calculator runs both paths through the same after-tax math so you can compare like-for-like.

All Charles River Laboratories tools → · Use the generic RSU Sell-vs-Hold Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →

Charles River Laboratories equity questions

Should I sell or hold my Charles River Laboratories RSUs at vest?
Charles River Laboratories restricted stock units (RSUs) are taxed as ordinary income on their value at vest whether or not you sell. The only open decision is what to do with the shares afterward: sell at vest and reinvest, or hold past twelve months for long-term capital-gains treatment on any further gain. The calculator above runs both paths through the same after-tax math so you can compare them directly.
Does Charles River Laboratories grant ISOs, NSOs, or RSUs?
Equity compensation at Charles River Laboratories typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
Do Charles River Laboratories RSUs use double-trigger vesting?
No. Charles River Laboratories restricted stock units (RSUs) use single-trigger vesting: each tranche becomes yours as it vests on schedule, taxed as ordinary income at that point, with no liquidity event required.
Find another companyOther peers

One piece of the puzzle.

OptionsAhoy plans your Charles River Laboratories equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.

Request beta access