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Mawer decreased ATR position by 463,981 shares

Aug 11, 2026Last updated Aug 12, 2026

This StonkWhisper whale intelligence report documents significant institutional position changes in $ATR based on SEC 13F filings and block-level trading data. Quarterly 13F disclosures are required for institutional investment managers with at least $100 million in qualifying assets under management. These filings reveal long positions in U.S. equities held as of quarter end. Material changes in institutional positioning — particularly from concentrated funds with a history of high-conviction bets — are tracked by StonkWhisper as leading indicators of institutional thesis formation or exit.

Mawer Investment Management Ltd. AUM: $14.7B DECREASED

AUM: $14.7B · 142 holdings · Period: 2026-06-30

463,981 Share Change

193,292 Current Shares

$24.2B Current Value

0.16% Portfolio %

-70.6% Change %

Position Change Detail

Issuer APTARGROUP INC

Ticker ATR

Shares 657,273 → 193,292 463,981

Value $82.8B → $24.2B

Portfolio Weight 0.16%

Change Type Decreased

Period of Report 2026-06-30

Other Mawer Positions This Period

Ticker	Issuer	Change Type	Share Change	Value
NVDA	NVIDIA CORPORATION	Increased	+2,127,064	$616.0B
SKM	SK TELECOM CO LTD	New	+1,708,146	$54.9B
APH	AMPHENOL CORP	Decreased	1,628,476	$415.8B
MRSH	MARSH & MCLENNAN COS INC	Decreased	1,604,431	$311.9B
BAC	VERIZON COMMUNICATIONS INC	Decreased	1,054,206	$71.0B
TME	TENCENT MUSIC ENTMT GROUP	Decreased	1,011,904	$51.8B
AEP	AMERICAN ELEC PWR CO INC	Increased	+949,366	$312.5B
SHEL	SHELL PLC	Increased	+893,456	$621.4B
VVV	VALVOLINE INC	Decreased	743,489	$13.5B
BKNG	BOOKING HOLDINGS INC	Increased	+683,781	$132.0B

Other Whales Moving ATR This Period

Manager	Change Type	Share Change
State Street	Increased	+78,851
Winton	Exited	55,678
Baillie Gifford	Exited	7,941
Fisher Investments	Decreased	2,640

View all sentiment, news, and whale activity for ATR (APTARGROUP INC).

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Data sourced from SEC 13F institutional holdings filings. This page does not constitute financial advice. StonkWhisper presents public records — it does not verify or guarantee the accuracy of institutional filings. 13F filings are reported quarterly and may lag actual positions.

Last updated: August 12, 2026 at 06:03 UTC