Companies That Cut Their Share Count the Most in Five Years (October 2026)

This list compares each company's shares outstanding today with the count five years earlier. Both numbers come from the cover pages of the 10-K and 10-Q filings with the SEC, adjusted for splits, so the drop is net of new shares issued. These are the 50 largest five-year drops among the companies on the Buyback Radar list, with the drop since each company's peak beside it.

Updated 2026-10-19 from SEC filings. How we count.

#	Company	5 years	Shares 5 years ago	Shares now	Since peak
1	Marathon PetroleumMPC	−54.4%	616M	281M	−58.3%
2	CannaeCNNE	−51.2%	89M	43M	−52.7%
3	AutoNationAN	−49.6%	66M	33M	−90.8%
4	Spectrum BrandsSPB	−44.2%	41M	23M	−52.9%
5	NavientNAVI	−41.8%	161M	94M	−76.6%
6	Synchrony FinancialSYF	−40.5%	547M	325M	−61.0%
7	General MotorsGM	−39.6%	1.5B	877M	−45.5%
8	FlexsteelFLXS	−39.5%	6.8M	4.1M	−48.3%
9	Avis Budget GroupCAR	−37.4%	56M	35M	−67.1%
10	DaVitaDVA	−37.4%	102M	64M	−74.3%
11	Assured GuarantyAGO	−37.0%	70M	44M	−77.4%
12	AIGAIG	−37.0%	830M	523M	−72.4%
13	MGIC InvestmentMTG	−37.0%	326M	205M	−44.7%
14	Affiliated Managers GroupAMG	−36.4%	41M	26M	−54.4%
15	Sallie MaeSLM	−35.9%	293M	188M	−64.3%
16	EmployersEIG	−35.8%	28M	18M	−66.4%
17	Charter CommunicationsCHTR	−35.1%	184M	119M	−53.5%
18	Grand Canyon EducationLOPE	−35.0%	40M	26M	−46.0%
19	Group 1 AutomotiveGPI	−34.1%	18M	12M	−51.3%
20	PVHPVH	−34.1%	70M	46M	−44.1%
21	EquitableEQH	−32.5%	405M	273M	−47.6%
22	Harley-DavidsonHOG	−32.4%	154M	104M	−65.9%
23	RCM TechnologiesRCMT	−32.2%	10M	7.1M	−46.0%
24	Pathward FinancialCASH	−32.0%	31M	21M	−47.3%
25	CovistaCVSA	−31.6%	50M	34M	−52.3%
26	Alpha MetallurgicalAMR	−31.1%	18M	13M	−31.6%
27	KB HomeKBH	−30.5%	87M	61M	−40.6%
28	VistraVST	−30.5%	483M	336M	−31.2%
29	Academy SportsASO	−30.4%	89M	62M	−29.3%
30	HCA HealthcareHCA	−30.4%	311M	217M	−51.2%
31	Trinet GroupTNET	−30.2%	66M	46M	−35.1%
32	CNX ResourcesCNX	−30.0%	211M	148M	−35.8%
33	H&R BlockHRB	−29.8%	176M	123M	−68.4%
34	Valero EnergyVLO	−29.6%	409M	288M	−53.7%
35	CF IndustriesCF	−29.4%	214M	151M	−57.5%
36	Euronet WorldwideEEFT	−29.2%	53M	37M	−30.1%
37	ValvolineVVV	−29.1%	180M	128M	−37.8%
38	Travel & LeisureTNL	−29.1%	86M	61M	−67.6%
39	eBayEBAY	−28.9%	626M	445M	−68.4%
40	Ziff DavisZD	−28.9%	48M	34M	−30.9%
41	Credit AcceptanceCACC	−28.6%	15M	10M	−76.9%
42	Ryder SystemR	−28.6%	54M	38M	−40.9%
43	OlinOLN	−28.5%	159M	114M	−31.8%
44	The BancorpTBBK	−28.4%	57M	41M	−29.6%
45	Murphy USAMUSA	−28.3%	26M	18M	−60.7%
46	Brighthouse FinancialBHF	−27.9%	80M	58M	−52.0%
47	ZoomInfo TechnologiesGTM	−27.8%	403M	291M	−28.0%
48	Steel DynamicsSTLD	−27.8%	198M	143M	−41.1%
49	EtsyETSY	−27.6%	127M	92M	−27.7%
50	Encore Capital GroupECPG	−27.5%	29M	21M	−32.3%

Which company reduced its share count the most in five years?

On Buyback Radar in October 2026, Marathon Petroleum (MPC), with 54.4% fewer shares than five years earlier.

How much bigger does each share get?

Retire 20% of the shares and each remaining share owns 1.25 times as much of the company. Retire a third and it owns 1.5 times as much. Half, twice as much.

Why five years?

One year can be a single large deal. Five years shows a habit, the kind of steady buying that Charlie Munger called a cannibal.

More rankings: Highest buyback yield · Share count down, 1 year · Accelerating buybacks · Best buyback stocks

Not investment advice. Figures are rebuilt from SEC filings every Monday. How we count.