Corning shares slide 6.8% amid guidance concerns and profit-taking after AI-driven rally

Corning Incorporated (GLW) is down 6.8% today. Here is some analysis on what might have caused this price movement.

Analysis: The drop appears tied to investors refocusing on near-term fundamentals after a sharp AI-related run-up. Corning’s latest outlook highlighted incremental costs and a more cautious near-term revenue setup, which can spark profit-taking when expectations and valuation have risen quickly.

Details:

Corning’s second-quarter outlook included an extended maintenance shutdown at its solar wafer facility, with an additional $30 million of expense embedded in guidance.

The company’s recent results and commentary emphasized strong demand for optical connectivity products tied to next-generation AI data centers, which had helped drive a strong prior rally and left the stock more sensitive to any “less-than-perfect” outlook.

Broader weakness in the technology equipment complex on the day likely added pressure, amplifying the move as investors reduced risk exposure.

This could also reflect positioning and valuation-driven selling after multiple bullish corporate updates earlier in May, including a high-profile AI-infrastructure manufacturing partnership.

Sources:

Corning Investor Relations, Investing.com, TradingKey

Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.

$GLW Insider Trading Activity

$GLW insiders have traded $GLW stock on the open market 15 times in the past 6 months. Of those trades, 0 have been purchases and 15 have been sales.

Here’s a breakdown of recent trading of $GLW stock by insiders over the last 6 months:

ERIC S MUSSER has made 0 purchases and 2 sales selling 40,000 shares for an estimated $4,703,791.
RONALD L VERKLEEREN (SVP Emerging Innovations Group) has made 0 purchases and 2 sales selling 31,000 shares for an estimated $4,066,288.
JORDANA DARYL KAMMERUD (SVP) sold 30,000 shares for an estimated $3,830,019
JOHN Z ZHANG (Exec. Vice President & CCDO) has made 0 purchases and 2 sales selling 16,531 shares for an estimated $2,974,748.
EDWARD A SCHLESINGER (Exec. Vice President and CFO) sold 21,104 shares for an estimated $2,206,326
LEWIS A STEVERSON (Vice Chairman, EVP and CLAO) sold 15,366 shares for an estimated $2,000,955
SOUMYA SEETHARAM (Senior Vice President & CDIO) sold 16,547 shares for an estimated $1,502,202
LI FANG (SVP, Corning Intl & NBD, Solar) sold 9,797 shares for an estimated $1,112,077
AVERY H III NELSON (Executive Vice President & COO) has made 0 purchases and 2 sales selling 7,845 shares for an estimated $1,016,522.
MICHAEL PAUL O'DAY (SVP and GM, Optical Comm.) sold 5,051 shares for an estimated $558,231
MICHELLE L GULLO (Senior Vice President & CHRO) sold 44 shares for an estimated $4,505

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

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$GLW Hedge Fund Activity

We have seen 1,084 institutional investors add shares of $GLW stock to their portfolio, and 989 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

FMR LLC added 10,458,914 shares (+72.4%) to their portfolio in Q1 2026, for an estimated $1,422,098,536
CAPITAL RESEARCH GLOBAL INVESTORS added 4,956,693 shares (+29.3%) to their portfolio in Q1 2026, for an estimated $673,961,547
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. removed 3,910,350 shares (-88.3%) from their portfolio in Q4 2025, for an estimated $342,390,246
WELLINGTON MANAGEMENT GROUP LLP removed 3,844,505 shares (-30.6%) from their portfolio in Q1 2026, for an estimated $522,737,344
LONE PINE CAPITAL LLC added 3,718,147 shares (+inf%) to their portfolio in Q1 2026, for an estimated $505,556,447
JPMORGAN CHASE & CO removed 3,181,374 shares (-21.3%) from their portfolio in Q4 2025, for an estimated $278,561,107
BLACKROCK, INC. added 3,125,628 shares (+4.9%) to their portfolio in Q1 2026, for an estimated $424,991,639

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

$GLW Congressional Stock Trading

Members of Congress have traded $GLW stock 3 times in the past 6 months. Of those trades, 3 have been purchases and 0 have been sales.

Here’s a breakdown of recent trading of $GLW stock by members of Congress over the last 6 months:

REPRESENTATIVE GILBERT RAY CISNEROS, JR. purchased up to $15,000 on 03/25.
REPRESENTATIVE MARIA ELVIRA SALAZAR has traded it 2 times. They made 2 purchases worth up to $100,000 on 03/19 and 0 sales.

To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.

$GLW Analyst Ratings

Wall Street analysts have issued reports on $GLW in the last several months. We have seen 2 firms issue buy ratings on the stock, and 0 firms issue sell ratings.

Here are some recent analyst ratings:

Citigroup issued a "Buy" rating on 01/12/2026
UBS issued a "Buy" rating on 11/21/2025

To track analyst ratings and price targets for $GLW, check out Quiver Quantitative's $GLW forecast page.

$GLW Price Targets

Multiple analysts have issued price targets for $GLW recently. We have seen 10 analysts offer price targets for $GLW in the last 6 months, with a median target of $185.5.

Here are some recent targets:

John Roberts from Mizuho set a target price of $220.0 on 05/12/2026
Tim Long from Barclays set a target price of $180.0 on 05/08/2026
Martin Yang from Oppenheimer set a target price of $210.0 on 05/07/2026
Samik Chatterjee from JP Morgan set a target price of $185.0 on 05/07/2026
Asiya Merchant from Citigroup set a target price of $225.0 on 05/07/2026
Joshua Spector from UBS set a target price of $223.0 on 05/07/2026
Mehdi Hosseini from Susquehanna set a target price of $180.0 on 04/29/2026

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.