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ATRO
$59.85-3.98%
as of close, Oct 20, 2026
☾ AH $59.85 -3.98%
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ATRO return calculator

Your investment#

How much
$
All at once, on the start date
Pick start & end dates10 years
Key datesStart at a well-known dateRecentMarket topsMarket bottomsEvents
Bought at that day's close
Key datesEnd at a well-known dateMarket topsMarket bottomsEvents
Latest close, Oct 20, 2026

Or drag the slider to set start and end dates

1980 to today, log scale
2008 crisisCovid
1990Oct 2016 – Today
Options

Result#

$1,000Oct 20, 2016$2,473Oct 20, 20262.5× 

$1,000 invested in ATRO on October 20, 2016 was worth $2,473 on October 20, 2026, with dividends reinvested.

That’s 9.5% a year compounded (CAGR) over 10 years: 2.5 times your money.

Over the same dates the same $1,000 would be worth $4,210 in the S&P 500 and $6,533 in the Nasdaq-100: ATRO trailed both the S&P 500 and the Nasdaq-100.

Price only$2,473if dividends were spent
Biggest fall−85.5%Jun 13, 2019 to Oct 30, 2020
At a flat 5% a year$1,629a savings account's rate
Gain$1,473on $1,000 put in

How this period ranks#

Better than 50% of all 440 periods of 10 years since 1980.

Your dates
−80%0%230%
Worst: −8.9% a year, Apr 1985 to Apr 1995Best: 34.4% a year, Feb 2004 to Feb 2014
One scale for every length, so longer periods bunch up. Point at a bar.

Growth of $1,000 in ATRO, October 20, 2016 to October 20, 2026#

Your $1,000$Your buySame plan in the S&P 500A lowLog scale: equal steps are equal percentage moves
Lowest value$264 · Oct 2020$
$500$1,000$2,473
20182020202220242026

How far ATRO was below its previous high. The biggest fall: −85.5% from Jun 13, 2019 to Oct 30, 2020, back to the high by Sep 26, 2025.

−85.5% from its high
high−86%

Your one buy. $1,000 on October 20, 2016, worth $2,473 on October 20, 2026. Pick Monthly or Yearly to see a plan's buys.

2.5×paid

What $1,000 would be worth on October 20, 2026, by start date#

Each point is the same amount invested that day and held to October 20, 2026, dividends reinvested. Above the line it made money.

Your start
$1,000$3,000$10k$30k$100k$300k
1990200020102020

$1,000 invested in ATRO, by year#

Started on each year's first close and held to Oct 20, 2026, dividends reinvested.

StartedWorth Oct 20, 2026MultipleA year (CAGR)
2017$2,6072.6×10.3%
2018$2,0972.1×8.8%
2019$1,9522.0×9.0%
2020$2,1412.1×11.8%
2021$4,9304.9×31.7%
2022$4,9795.0×39.8%
2023$5,9025.9×59.7%
2024$3,4743.5×56.1%
2025$3,7903.8×110.0%
2026$1,0571.1×—

Methodology#

A buy is made at the start date's close, or the next session's when the market was closed that day, and valued at the end date's close; a monthly or yearly plan buys on the same day of each month or year. "Dividends reinvested" uses split- and dividend-adjusted closes (a standard total-return approximation; taxes and fees excluded). "Price-only" uses split-adjusted closes. ATRO data begins March 17, 1980; values as of October 20, 2026 and refresh daily. The ranking compares month-end to month-end periods. Past performance does not predict future returns; not investment advice.

See the live ATRO chart and fundamentals on the ATRO quote page or the S&P 500 return calculator.

FAQ#

How much would $1,000 invested in ATRO be worth today?
$1,000 invested in ATRO on October 20, 2016 would be worth $2,473 on October 20, 2026, with dividends reinvested — 9.5% a year compounded (CAGR).
How far back does the ATRO calculator go?
ATRO data begins March 17, 1980, with a close every session. Pick any start and end date in that span — 46 years, 7 months of history.
Does this include dividends?
Yes. The default "dividends reinvested" view uses split- and dividend-adjusted closing prices — a standard total-return approximation that excludes taxes and fees. A price-only view (split-adjusted, no dividends) is also available.