Seagate Technology (STX) Stock After Hours: What Happened After the Bell on Dec. 12, 2025—and What to Watch Before the Next Market Open

Updated: Friday, December 12, 2025 (after the close)

Seagate Technology Holdings PLC (NASDAQ: STX) ended Friday’s session sharply lower and then slipped further in after-hours trading, as a broad tech/AI selloff hit the market and investors digested a fresh batch of Form 4 insider filings. With Seagate coming off a fresh 52-week high set just one day earlier, the move is being watched as a potential “cooling off” moment for one of 2025’s standout AI-infrastructure winners.

One important calendar note: December 13, 2025 is a Saturday, so U.S. markets are closed. The “next market open” for STX is the next regular U.S. session (Monday, Dec. 15, 2025). Still, what happens in extended hours and in the weekend news cycle can shape the tone for Monday’s pre-market.

STX stock price after the bell (Dec. 12, 2025)

Regular-session close (Dec. 12):$287.64, down about 6.56% on the day. ^[1]
After-hours (as of 6:30 PM ET):$284.95, down $2.69 (-0.94%) from the close. ^[2]
After-hours range (so far):$282.90 to $288.97. ^[3]
Prior day context: STX closed at $307.85 on Thursday, when it also printed a new 52-week high (reported at $308.93). ^[4]

That sequence—record high on Dec. 11, sharp pullback on Dec. 12—is exactly the type of setup that tends to draw attention to: (1) sector risk sentiment, (2) profit-taking, and (3) any company-specific catalysts.

Why Seagate stock dropped Friday: the bigger market story mattered

Friday’s decline in STX didn’t happen in a vacuum. U.S. stocks broadly sold off as investors rotated away from the AI/tech trade amid renewed concerns over AI profitability and valuations, sparked in part by Broadcom’s margin commentary and ongoing Oracle-related AI spending jitters.

Reuters reported the S&P 500 fell 1.07% and the Nasdaq fell 1.69% on Friday, with tech hit hard as “AI bubble” worries resurfaced and Treasury yields rose. ^[5]
The Associated Press similarly described Friday as a market drop driven by weakness in AI-linked “superstars,” with the Nasdaq down 1.7% and the S&P 500 down 1.1%. ^[6]

In other words: Seagate traded in the slipstream of a risk-off day for AI and AI-adjacent names, and it did so right after reaching a new high—often a recipe for intensified profit-taking.

STX showed up on “gap down” radars early

A market-scan article on Friday morning listed Seagate (STX) among S&P 500 names “gapping down,” noting an intraday drop around the open. ^[7]
This isn’t a fundamental catalyst by itself, but it aligns with the “risk-off + unwind” tone that defined the session.

The biggest Seagate-specific news on Dec. 12: insider Form 4 filings

Multiple Form 4 filings hit the tape on Dec. 12, detailing transactions dated Dec. 11 by senior executives and directors. These filings matter because they can influence sentiment—especially after a big run-up—though the details show many of the transactions were option exercises paired with share withholding/surrender to cover costs and/or taxes.

Here are the key filings reported on Dec. 12:

CFO Gianluca Romano (Form 4)

Reported: exercise of 1,695 options and surrender of 857 shares at $307.85 (share surrender described as covering option cost and/or tax liability). ^[8]

Chairman William D. Mosley (Form 4)

Reported: exercise of 3,319 options and surrender of 1,678 shares at $307.85, explicitly described as a surrender back to the company to cover exercise cost and/or taxes. ^[9]

VP John Christopher Morris (Form 4)

Reported: exercise of 941 options and surrender of 430 shares at $307.85 for exercise/tax-related purposes. ^[10]

VP Ban Seng Teh (Form 4): the “real sale” investors will notice

Reported: exercise of 2,400 shares and a planned sale of 2,010 shares at $295.90, executed under a 10b5-1 trading plan. ^[11]

How to interpret this (without overreacting):

Option exercises with share withholding/surrender are often administrative and tied to compensation mechanics rather than a directional bet. ^[12]
A planned sale under 10b5-1, however, is still an outright sale and can draw extra attention—especially on a day when the stock is already under pressure. ^[13]

Institutional and “smart money” angle: Soros position disclosed

Another widely-circulated item dated Dec. 12: MarketBeat reported that Soros Capital Management LLC opened a new position in Seagate, citing a 13F filing and reporting an acquisition of 36,700 shares valued around $5.3 million. ^[14]

Take this as context, not a same-day catalyst: 13F-based stories typically reflect prior-quarter positioning, not real-time buys. Still, it adds to the narrative that big institutions have been paying attention to the storage/AI theme. ^[15]

Analyst forecasts and price targets: where Wall Street stands heading into next week

Even after Friday’s pullback, the Street’s consensus remains generally constructive, though price targets vary widely—typical for a high-momentum name that’s repriced quickly.

Consensus targets (12-month)

MarketBeat lists an average price target around $287.17 (near Friday’s close), with a high of $465 and low of $150 across analysts it tracks. ^[16]
TipRanks shows an average price target around $297.78, also with $465 high / $150 low, and a “Moderate Buy” style consensus. ^[17]
Investing.com similarly reports a consensus “Buy” and an average target around $289.24 (with the same broad $150–$465 span). ^[18]

Notable recent upgrade: Citi

Citi previously raised its price target to $320 from $275 and kept a Buy rating, pointing to supply/demand dynamics, pricing momentum, and demand visibility “through 2027,” tied to AI-driven unstructured data growth. ^[19]

Other bullish target bumps cited recently

An Investing.com company-news recap highlighted other target increases—mentioning BofA to $320, TD Cowen to $340, and Cantor Fitzgerald to $400, tied to expectations that HDD demand stays ahead of supply into 2026. ^[20]

What this means for investors:

The stock’s huge 2025 run created a situation where even “good news” has to be great to push shares meaningfully higher.
With targets spread from $150 to $465, the debate isn’t whether Seagate is relevant to AI—it’s how much of that future is already priced in. ^[21]

Key calendar items to know before the next open

1) Earnings timing (next major catalyst window)

Multiple market calendars point to late January 2026 as the next earnings window for STX (often listed around Jan. 20, 2026 as an estimate). ^[22]
Because dates can shift until the company confirms, treat this as an expected window, not a guaranteed date. ^[23]

2) Dividend: record date and payment date

Seagate’s board declared a quarterly cash dividend of $0.74 per share, payable Jan. 9, 2026, to shareholders of record as of Dec. 24, 2025. ^[24]
Several trackers list the ex-dividend date as Dec. 24, 2025. ^[25]

3) Macro data next week could move AI-adjacent stocks

Reuters’ “week ahead” coverage highlighted that investors are looking toward major U.S. releases next week—jobs, inflation, and retail sales—with the potential to add volatility, especially if liquidity thins into the holidays. ^[26]

For STX, macro matters because it can change:

risk appetite for high-momentum tech names,
discount-rate assumptions (valuation sensitivity),
and the tone for the broader AI infrastructure trade.

What to watch specifically for STX before the next session

Here’s the practical checklist for the next open (Monday, Dec. 15):

Watch #1: Follow-through in extended trading and Monday pre-market

After-hours showed STX below $285 as of 6:30 PM ET Friday. ^[27]
Extended-hours moves can be noisy, but they can also signal whether Friday’s drop is being “bought” or whether sellers remain in control into Monday.

Watch #2: AI sentiment after Broadcom/Oracle shockwaves

Friday’s market narrative was clear: investors questioned AI economics and rotated away from parts of tech. ^[28]
Because Seagate has increasingly traded as an AI infrastructure beneficiary, it can move with AI sentiment even when there’s no Seagate-specific headline.

Watch #3: Insider filings—headline risk vs. substance

The cluster of Form 4s will keep showing up in feeds. The nuance is that many were exercise + tax withholding/surrender mechanics, while one filing included a planned sale under 10b5-1. ^[29]
Markets often react to the headline first (“insiders sold”), so it’s worth knowing the details.

Watch #4: Analyst commentary and target changes

STX has a wide dispersion of targets, and any incremental note—especially from major banks—can matter after a high-volatility day. ^[30]

Watch #5: Key reference levels investors are using

Without turning this into “chart talk,” two factual reference points are now obvious to the market:

$308.93: the recent 52-week high area. ^[31]
$282–$283 zone: the after-hours low range reported Friday evening. ^[32]

These levels often become psychological markers for positioning and headlines.

Bottom line

Seagate (STX) is ending the week on a very different note than it started: from a new high on Dec. 11 to a sharp pullback on Dec. 12, followed by a modest additional dip after hours. ^[33]

The most important “what to know” items heading into the next open are:

The drop aligned with a broad AI/tech risk-off day, not just Seagate-specific news. ^[34]
Insider filings were heavy, but many were compensation mechanics; one included a planned sale. ^[35]
Analyst targets remain generally supportive (moderate-buy consensus), with Citi among firms highlighting demand visibility tied to AI data growth. ^[36]
Keep an eye on macro data next week and overall AI sentiment, which have been driving correlations across the sector. ^[37]

References