Buyback Radar
Company reports

Quest Diagnostics

DGX

Quest Diagnostics has retired 47.5% of its shares since 2002, from 210,362,416 to 110,373,360.

47.5%retired since 2002
10.0%last 5 years
0.8%last 12 months
110Mshares today
Shares outstanding, 1999 to todaysplit adjusted, from SEC filings
a quarter gone 2012210M shares, 2002110M200020052010201520202025
1999, 174,875,8042026-07-15, 110,373,360
A share bought in 1999
1.6× more of Quest Diagnostics today, without buying another share. It was one of 174,875,804 shares then. It is one of 110,373,360 now.
Every filing we read27 fiscal years, split adjusted
Fiscal yearDateShares outstandingFiling
19992000-03-10174,875,80410-K405cover page
20002001-02-28186,677,46010-Kcover page
20012002-02-22192,586,18210-K405cover page
20022003-02-28210,362,41610-Kcover page
20032004-02-23207,209,27010-Kcover page
20042005-02-28202,845,90410-Kcover page
20052006-02-24198,393,61910-Kcover page
20062007-02-21193,621,71710-Kcover page
20072008-02-01194,149,12710-Kcover page
20082009-01-30190,574,83410-Kcover page
20092009-12-31178,917,32210-K
20102011-01-31171,164,28210-K
20112012-01-31158,336,94910-K
20122013-01-31158,217,05210-K
20132014-01-31144,307,14710-K
20142015-01-31144,311,30210-K
20152016-01-31142,758,58410-K
20162017-01-31137,495,27610-K
20172018-01-31135,637,85210-K
20182019-01-31134,261,76810-K
20192020-01-31133,455,06810-K
20202021-01-31133,454,76110-K
20212022-01-31119,454,78110-K
20222023-01-31111,323,00310-K
20232024-02-01110,707,29310-K
20242025-01-31110,978,06910-K
20252026-02-02109,866,32010-K

Source: all 10-K filings of Quest Diagnostics on EDGAR. Download this series as CSV. Licence CC BY 4.0, credit Buyback Radar.

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Quest Diagnostics buybacks, answered

Is Quest Diagnostics buying back its stock?

Yes. Quest Diagnostics has 0.8% fewer shares outstanding than twelve months ago, 110,373,360 as of July 15, 2026. Over five years the share count is down 10.0%.

How many shares has Quest Diagnostics bought back?

Net of every new share it issued, Quest Diagnostics has 100.0 million fewer shares than at its 2002 peak. That is 47.5% of the company.

How many shares does Quest Diagnostics have outstanding?

110,373,360 shares, as of July 15, 2026, from the cover page of its latest 10-Q. At the 2002 peak it had 210,362,416.

What do Quest Diagnostics' buybacks mean for a shareholder?

Each share is a bigger slice of the company. Someone who held Quest Diagnostics stock in 2002 owns 1.9 times as much of the business today without buying another share. Whether that was a good use of cash depends on the price paid.

How does Quest Diagnostics compare with other cannibal stocks?

Quest Diagnostics ranks No. 72 of 251 companies on Buyback Radar by share of the company retired since its peak. Close to it on the list: McDonald's (47.6%), Tapestry (47.5%), Texas Instruments (47.4%), Pathward Financial (47.3%).

Every answer is computed from Quest Diagnostics' own SEC filings and rebuilt every Monday. Latest count: 10-Q on EDGAR.

Superinvestors who own it

Chris DavisDavis Selected Advisers1,555,612 shares, $329.8M, Q2 2026

From the latest 13F filings. All superinvestors.

Insider buying, last 12 months

No open-market purchases reported in the last 12 months.

The story

The numbers say what happened. The story says whether it can continue. We cover companies like Quest Diagnostics in depth on Cannibal Stocks.

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