What is the StonkWhisper Whisper Index?

The Whisper Index is StonkWhisper's proprietary market sentiment score (0–90) that aggregates retail investor discussion velocity, volume, and sentiment across Reddit, StockTwits, and other social platforms for 500+ U.S. equities in real time.

What is dark pool trading and why does it matter for stock analysis?

Dark pools are off-exchange trading venues where large institutional orders execute away from public markets. StonkWhisper tracks FINRA-reported dark pool volume to identify unusual institutional accumulation or distribution that may precede significant price moves.

How does StonkWhisper track congressional stock trades?

The STOCK Act requires U.S. Congress members to disclose personal stock trades within 45 days. StonkWhisper monitors these mandatory disclosures in near real-time, surfacing trades by legislators who may have non-public information advantages.

State Street decreased AMG position by 34,311 shares

Mar 28, 2026Last updated Jul 9, 2026

This StonkWhisper whale intelligence report documents significant institutional position changes in $AMG 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.

STATE STREET CORP AUM: $2896.4B DECREASED

AUM: $2896.4B · 4,269 holdings · Period: 2025-12-31

34,311 Share Change

929,397 Current Shares

$267.9B Current Value

0.01% Portfolio %

-3.6% Change %

Position Change Detail

Issuer AFFILIATED MANAGERS GROUP IN

Ticker AMG

Shares 963,708 → 929,397 34,311

Value $229.8B → $267.9B

Portfolio Weight 0.01%

Change Type Decreased

Period of Report 2025-12-31

Other State Street Positions This Period

Ticker	Issuer	Change Type	Share Change	Value
NFLX	NETFLIX INC	Increased	+159,578,053	$16575.0B
NOW	SERVICENOW INC	Increased	+38,441,898	$7337.3B
IPG	INTERPUBLIC GROUP COS INC	Exited	32,109,386	—
WBD	WARNER BROS DISCOVERY INC	Decreased	27,262,597	$3777.3B
LXPUSD	LXP INDUSTRIAL TRUST	Exited	17,125,451	—
RKT	ROCKET COS INC	Increased	+15,807,776	$400.5B
KEL	KELLANOVA	Exited	13,425,912	—
HN9	HANESBRANDS INC	Exited	13,417,876	—
NVDA	NVIDIA CORPORATION	Increased	+11,451,386	$184911.1B
NNDM	NANO DIMENSION LTD	Increased	+9,926,849	$16.0B

Other Whales Moving AMG This Period

Manager	Change Type	Share Change
Millennium	Decreased	221,103
Artisan Partners	New	+130,112
Balyasny	Decreased	104,388
Renaissance Tech	Decreased	48,200
Fisher Investments	Increased	+40,107
Schonfeld	New	+28,720
Lyrical	Decreased	28,248
ExodusPoint	Increased	+18,628
Two Sigma	Exited	7,495
Franklin Templeton	Increased	+7,239

View all sentiment, news, and whale activity for AMG (AFFILIATED MANAGERS GROUP IN).

Track State Street and other whale moves in real time on The Wire →

Get alerts when new 13F filings drop — Go Pro →

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: July 09, 2026 at 06:00 UTC