Quest Diagnostics Ownership | Who Owns Quest Diagnostics?

Overview Forecast RevenueFinancials Chart Transcripts

Quest Diagnostics Ownership Summary

Quest Diagnostics is owned by 91.19% institutional investors, 0.40% insiders, and 8.41% retail investors. Vanguard group is the largest institutional shareholder, holding 12.46% of DGX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.19% of its assets in Quest Diagnostics shares.

DGX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quest Diagnostics	91.19%	0.40%	8.41%
Sector	Healthcare Stocks	279.18%	10.62%	-189.80%
Industry	Diagnostics & Research Stocks	47.99%	9.06%	42.96%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	13.96M	12.46%	$2.11B
Blackrock	10.06M	9.06%	$1.38B
Blackrock funding, inc. /de	10.12M	9.04%	$1.53B
Price t rowe associates inc /md/	5.49M	4.90%	$828.26M
State street	5.22M	4.70%	$787.72M
Victory capital management	3.36M	3.00%	$506.89M
Geode capital management	2.69M	2.40%	$404.76M
Jpmorgan chase	2.43M	2.17%	$367.18M
Davis selected advisers	2.40M	2.16%	$361.65M
Grantham, mayo, van otterloo	2.27M	2.03%	$342.30M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Ivy lane capital management	57.00K	4.64%	$8.60M
Atwater malick	55.14K	2.79%	$8.32M
Davis selected advisers	2.40M	2.10%	$361.65M
Naples money management	16.70K	1.95%	$2.29M
Jgp wealth management	99.86K	1.95%	$15.06M
Fiduciary management inc /wi/	1.30M	1.83%	$196.53M
Parkman healthcare partners	90.35K	1.82%	$13.63M
Delta capital management	20.79K	1.79%	$3.14M
Isthmus partners	90.59K	1.66%	$13.67M
United bank	89.16K	1.51%	$12.20M

Top Buyers

Holder	Shares	% Assets	Change
Price t rowe associates inc /md/	5.49M	0.10%	1.64M
Norges bank	1.27M	0.03%	1.27M
Jpmorgan chase	2.43M	0.03%	916.90K
Ubs group	964.99K	0.03%	588.48K
Alliancebernstein	1.09M	0.06%	498.00K

Top Sellers

Holder	Shares	% Assets	Change
American century companies	1.52M	0.13%	-764.96K
Nuance investments	-	-	-681.64K
Blackrock	10.06M	0.03%	-641.17K
Wellington management group llp	1.78M	0.05%	-549.28K
8 knots management	-	-	-497.61K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	1.27M	0.03%	1.27M	$191.82M
Raymond james financial	447.08K	0.03%	447.08K	$67.45M
Foundry partners	108.32K	0.82%	108.32K	$16.34M
Edgestream partners	27.69K	0.18%	27.69K	$4.18M
Wbi investments	27.68K	1.04%	27.68K	$4.18M

Sold Out

Holder	Change
Kozak & associates	-1.00
Macroview investment management	-2.00
Caitlin john	-3.00
Gradient investments	-3.00
Tfo-tdc	-3.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2025	963	6.41%	101,224,949	2.29%	91	1.15%	452	5.12%	328	10.07%
Dec 31, 2024	877	2.10%	98,448,593	2.51%	88	1.21%	416	9.19%	286	-6.23%
Sep 30, 2024	848	-	95,876,144	-1.23%	85	1.12%	379	5.57%	300	0.33%
Jun 30, 2024	836	1.33%	96,911,812	-0.91%	87	1.12%	353	1.15%	294	-5.47%
Mar 31, 2024	825	-2.14%	97,800,294	0.38%	88	1.16%	349	-3.32%	311	-4.31%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	3.56M	3.19%	57.33K
Vanguard US Total Market Shares ETF	3.51M	3.17%	2.60K
Vanguard Institutional 500 Index Trust	3.14M	2.81%	50.08K
Vanguard Mid Cap Index Institutional	2.41M	2.16%	23.09K
Sycamore Mid Cap Value Comp	2.18M	1.95%	2.10M
Victory Sycamore Established Value R	2.18M	1.95%	-210.00K
T. Rowe Price U.S. Large-Cap Core Tr-B	1.57M	1.41%	47.37K
T. Rowe Price U.S. Large-Cap Core Tr-C	1.57M	1.40%	47.37K
T. Rowe Price US Large-Cap Core Eq Comp	1.47M	1.32%	-3.75K
T. Rowe Price US Large-Cap Core	1.47M	1.32%	-958.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 13, 2025	DELANEY MARK E	SVP & Chief Commercial Officer	Sell	$153.22K
May 12, 2025	DELANEY MARK E	SVP & Chief Commercial Officer	Sell	$153.58K
Apr 02, 2025	Davis J. E.	CEO and President	Sell	$119.42K
Apr 02, 2025	Davis J. E.	CEO and President	Sell	$397.55K
Apr 02, 2025	Davis J. E.	CEO and President	Sell	$238.11K

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	-	18
2025 Q1	-	12
2024 Q4	-	11
2024 Q3	-	3
2024 Q2	-	1

DGX Ownership FAQ

Who Owns Quest Diagnostics?

Quest Diagnostics shareholders are primarily institutional investors at 91.19%, followed by 0.40% insiders and 8.41% retail investors. The average institutional ownership in Quest Diagnostics's industry, Diagnostics & Research Stocks, is 47.99%, which Quest Diagnostics exceeds.

Who owns the most shares of Quest Diagnostics?

Quest Diagnostics’s largest shareholders are Vanguard group (13.96M shares, 12.46%), Blackrock (10.06M shares, 9.06%), and Blackrock funding, inc. /de (10.12M shares, 9.04%). Together, they hold 30.57% of Quest Diagnostics’s total shares outstanding.

Does Blackrock own Quest Diagnostics?

Yes, BlackRock owns 9.06% of Quest Diagnostics, totaling 10.06M shares as of Jun 2024. This represents 0.03% of BlackRock's total assets, with a market value of 1.38B$. In the last quarter, BlackRock decreased its holdings by -641K shares, a -5.99% change.

Who is Quest Diagnostics’s biggest shareholder by percentage of total assets invested?

Ivy lane capital management is Quest Diagnostics’s biggest shareholder by percentage of total assets invested, with 4.64% of its assets in 57K Quest Diagnostics shares, valued at 8.6M$.

Who is the top mutual fund holder of Quest Diagnostics shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Quest Diagnostics shares, with 3.19% of its total shares outstanding invested in 3.56M Quest Diagnostics shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools