The biggest US insider buys of the last twelve months

The largest open-market purchases insiders made in their own companies, with how each has performed against the market since it was disclosed.

#	Company	Bought by	Date	Value	Alpha since
1	SaverOne 2014 Ltd.	VisionWave Holdings, Inc.	2026-05-28	$3.6bn	-17.1%
2	SaverOne 2014 Ltd.	VisionWave Holdings, Inc.	2026-06-05	$2.1bn	-17.1%
3	SaverOne 2014 Ltd.	VisionWave Holdings, Inc.	2026-06-16	$1.1bn	+37.1%
4	Liberty Latin America Ltd.	MALONE JOHN C	2026-05-22	$107m	+42.2%
5	Summit Therapeutics Inc.	DUGGAN ROBERT W	2026-06-12	$50m	-2.7%
6	RBC BlueBay Enhanced Income Fund	RBC Global Asset Management (U.S.) Inc.	2026-05-28	$49m	n/a
7	REPUBLIC SERVICES, INC.	CASCADE INVESTMENT, L.L.C.	2026-05-13	$35m	+6.5%
8	REPUBLIC SERVICES, INC.	CASCADE INVESTMENT, L.L.C.	2026-05-14	$31m	+0.6%
9	REPUBLIC SERVICES, INC.	CASCADE INVESTMENT, L.L.C.	2026-05-14	$20m	+0.6%
10	Lafayette Square USA, Inc.	Employees' Retirement System of the State of Hawaii	2026-06-26	$20m	n/a
11	Quantinuum Inc.	Barron Hal	2026-06-05	$15m	-11.0%
12	Cosan S.A.	Martins Marcelo Eduardo	2026-05-19	$13m	n/a
13	Artiva Biotherapeutics, Inc.	GC Corp.	2026-05-11	$12m	+33.4%
14	Cosan S.A.	Martins Marcelo Eduardo	2026-04-10	$11m	n/a
15	CION Ares Diversified Credit Fund	THRIVENT FINANCIAL FOR LUTHERANS	2026-07-06	$11m	n/a
16	Mission Produce, Inc.	Globalharvest Holdings Venture Ltd	2026-07-08	$9.2m	-5.6%
17	Mission Produce, Inc.	Globalharvest Holdings Venture Ltd	2026-07-06	$8.3m	-7.5%
18	Mission Produce, Inc.	Globalharvest Holdings Venture Ltd	2026-07-09	$7.9m	-5.1%
19	Netskope Inc	ICONIQ Strategic Partners VIII Holdings, L.P.	2026-07-08	$7.2m	-4.7%
20	Liberty Latin America Ltd.	MALONE JOHN C	2026-06-22	$5.5m	+12.8%
21	TXO Partners, L.P.	SIMPSON BOB R	2026-06-03	$5.1m	-0.8%
22	Carlyle Tactical Private Credit Fund	THRIVENT FINANCIAL FOR LUTHERANS	2026-06-23	$5.0m	n/a
23	FIRST TRUST ALTERNATIVE OPPORTUNITIES FUND	PECK MICHAEL D	2026-07-02	$5.0m	n/a
24	StepStone Group Inc.	McCabe Michael I	2026-06-11	$4.0m	-0.5%
25	Quantinuum Inc.	JIMENEZ JOSEPH	2026-06-05	$4.0m	-11.0%

SVRE had 3 further qualifying purchases; RSG had 10 further qualifying purchases; AVO had 1 further qualifying purchase, held back so a single company doesn’t fill the board.

How this is put together

• Only open-market purchases count. Share allotments, vesting, option exercises and placings are disclosed the same way but aren't purchases at a market price, and they are frequently the largest disclosures — so including them would put a share award at the top of a page about buying.
• UK rows must be classified as open-market buys by comparing the filed price against that day's close. Rows we can't price yet are left out rather than assumed innocent. US rows come from a feed already restricted to Form 4 transaction code P, excluding derivatives and amendments.
• Each purchase is listed individually. Several insiders buying the same company on the same day appear as separate rows — that's several disclosures, not one large one. Where a purchase forms part of a cluster, it's marked.
• No more than three purchases from any single company appear on a board. One issuer filing the largest handful of the year would otherwise fill it and answer nothing; where entries are held back, the count is shown.
• Values are in the market's own currency and are never converted, so no exchange rate is involved.
• Performance is measured from the closing price on the day the purchase was disclosed — the first price a reader could have paid — not from the insider's own fill, and is marked against the most recent cached close rather than a live quote.
• Companies that have since delisted may stop being priced, so their entries can show no performance figure. Past performance is not a reliable indicator of future results.

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