TOP TIERMARKET NEWSWIRE
Movers explained · 2026-08-21

Archived explainer. For the current picture see today's MRCY page.

Why Is MERCURY SYS INC (MRCY) Stock Down Today?

By the Top Tier Newswire AI Desk · August 21, 2026 at 12:25 AM ET · reviewed against 9 wire stories

MERCURY SYS INC (MRCY) is down -6.93% in the latest session. Our newswire has captured 9 stories on MRCY across 5 sources in the last 36 hours, with AI sentiment reading mixed (avg 56/100).

Public view, delayed 4h. Every headline, price and sentiment read below — and this write-up itself — reaches Pro subscribers live. Public readers see it once it clears the delay.

MRCY stock is down 6.93% as of the close at $94.23. The decline follows recent insider selling and investor concerns over the company’s profitability and exposure to semiconductor cost volatility. Despite recent analyst upgrades and a strategic partnership with Palantir, the stock is trading near a 52-week low amid mixed earnings results and a lack of immediate earnings catalysts.

What Happened

Mercury Systems reported mixed Q4 2026 results, with unprofitable performance and a trailing twelve-month (TTM) net margin of -1.5%. The company disclosed a new risk tied to its reliance on advanced semiconductor and memory components, exposing its margins to cost volatility. This came as three analysts raised price targets in the past week, including Truist to $120 from $109 and Canaccord to $128 from $106. Despite these developments, investor sentiment turned negative following the earnings report, as highlighted by a Yahoo Finance article noting that investors are looking elsewhere for growth.

On August 3, Mercury Systems announced a strategic alliance with Palantir Technologies to automate material planning and factory operations for U.S. military programs. However, the stock failed to capitalize on the partnership’s potential as a catalyst. Meanwhile, three insiders, including CEO William L. Ballhaus, sold shares on August 17, adding to investor unease. The selling continued in the 90 days prior, with six total insider sales totaling $5.7 million.

What The Data Shows

MRCY has printed 26 fresh 52-week lows on August 21, indicating a prolonged period of bearish pressure. The stock is trading within its 52-week range of $62.78 to $128.45, with a market cap of $6.3 billion. Despite a 9.0% year-over-year revenue increase, the company remains unprofitable with a TTM EPS of -0.24. The stock’s beta of 1.00 suggests it is moving in line with the broader market.

What To Watch

Mercury Systems has scheduled a Q4 2026 earnings call presentation for August 19, 2026. Investors will be watching for further clarity on the company’s financial outlook and the impact of its partnership with Palantir. Coverage breadth remains at nine stories from five sources in the last 36 hours, indicating ongoing investor interest.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

MRCY by the numbers

Last: $94.23Session: -6.93%Coverage: 9 stories / 5 sourcesAI sentiment: 56/100 (mixed)Mkt cap: $6.3B52w: $62.78 to $128.45
MRCY · Aug 21 session (5-min) · -3.05% vs prior close · updated 8:51 PM ET
$91.11$93.30$95.48prev close $94.23$91.368:50 AM10:46 AM12:42 PM2:38 PM4:35 PM8:50 AM · $95.009:30 AM · $95.259:35 AM · $94.979:40 AM · $94.509:45 AM · $94.009:50 AM · $94.399:55 AM · $94.4110:00 AM · $94.0410:05 AM · $94.0010:10 AM · $93.7410:15 AM · $93.9910:20 AM · $93.6910:25 AM · $93.1910:30 AM · $92.7610:35 AM · $92.3310:40 AM · $92.2610:45 AM · $92.2310:50 AM · $92.2910:55 AM · $92.1911:00 AM · $92.2511:05 AM · $91.9411:10 AM · $92.5711:15 AM · $92.0811:20 AM · $92.0911:25 AM · $91.7111:30 AM · $92.1011:35 AM · $92.0811:40 AM · $92.2211:45 AM · $92.3011:50 AM · $92.6611:55 AM · $92.8012:00 PM · $92.6612:05 PM · $92.5312:10 PM · $92.6812:15 PM · $92.6712:20 PM · $92.5112:25 PM · $92.9412:30 PM · $92.9712:35 PM · $93.1112:40 PM · $93.2712:45 PM · $92.3112:50 PM · $92.3812:55 PM · $92.421:00 PM · $92.751:05 PM · $92.751:10 PM · $92.591:15 PM · $92.651:20 PM · $92.671:25 PM · $92.341:30 PM · $92.311:35 PM · $92.211:40 PM · $92.111:45 PM · $92.301:50 PM · $92.191:55 PM · $92.102:00 PM · $91.942:05 PM · $92.112:10 PM · $91.972:15 PM · $91.802:20 PM · $91.842:25 PM · $92.062:30 PM · $92.082:35 PM · $91.972:40 PM · $92.232:45 PM · $92.532:50 PM · $92.712:55 PM · $92.233:00 PM · $92.213:05 PM · $92.433:10 PM · $92.473:15 PM · $92.613:20 PM · $92.873:25 PM · $92.653:30 PM · $92.763:35 PM · $92.883:40 PM · $92.543:45 PM · $92.503:50 PM · $92.273:55 PM · $91.344:00 PM · $91.364:05 PM · $91.364:35 PM · $91.36
AI sentiment, last 36h · averaged over 9 stories · 56/100 bullish
AI sentiment 56/100 (bullish)0 · bearish50bullish · 100

The headlines behind the move

Story flow · 6 stories on the wire, last 36h · hover or tap a dot for the headline
36h ago24h ago12h agopublishSeeking Alpha · sentiment 50 · Mercury Systems, Inc. 2026 Q4 - Results - Earnings Call PresentationSeeking Alpha · 50Mercury Systems, Inc. 2026 Q4 - Results - Earnings Call PresentationTipRanks · sentiment 38 · Mercury Systems’ Fixed‑Price Contracts Expose Margins to Semiconductor Cost VolatilityTipRanks · 38Mercury Systems’ Fixed‑Price Contracts Expose Margins to Semiconductor Cost VolatilityThe Fly · sentiment 61 · Mercury Systems price target raised to $128 from $106 at CanaccordThe Fly · 61Mercury Systems price target raised to $128 from $106 at CanaccordYahoo Top · sentiment 66 · Is Mercury Systems (MRCY)’s Partnership With Palantir Technologies (PLTR) the Catalyst for a Hardware Turnaround?Yahoo Top · 66Is Mercury Systems (MRCY)’s Partnership With Palantir Technologies (PLTR) the Catalyst fo…The Fly · sentiment 61 · Mercury Systems price target raised to $120 from $109 at TruistThe Fly · 61Mercury Systems price target raised to $120 from $109 at TruistYahoo Finance · sentiment 63 · Mercury Systems (MRCY): Is This Defense Stock Entering a New Growth Phase?Yahoo Finance · 63Mercury Systems (MRCY): Is This Defense Stock Entering a New Growth Phase?
23d agoYahoo FinanceBULLISH 63General

Mercury Systems (MRCY): Is This Defense Stock Entering a New Growth Phase?

Aristotle Capital Boston, LLC, an investment advisor, released its “Small Cap Equity Fund” Q2 2026 investor letter. A copy of the letter can be downloaded here. The Fund returned 13.69% in the second quarter of 2026, trailing the Russell 2000 Index’s 21.49% gain as security selection in information technology and industrials weighed on performance despite […]

24d agoThe FlyBULLISH 61Analyst

Mercury Systems price target raised to $120 from $109 at Truist

24d agoYahoo TopBULLISH 66Product/PR

Is Mercury Systems (MRCY)’s Partnership With Palantir Technologies (PLTR) the Catalyst for a Hardware Turnaround?

On August 3, Mercury Systems, Inc. (NASDAQ:MRCY) and Palantir Technologies Inc. (NASDAQ:PLTR) announced a strategic alliance aimed at automating material planning and factory operations for U.S. military programs. Working directly alongside the U.S. Department of War, Palantir is leveraging its software suite to boost throughput and slash delivery timelines for key defense industrial suppliers. MRCY […]

24d agoThe FlyBULLISH 61Analyst

Mercury Systems price target raised to $128 from $106 at Canaccord

24d agoTipRanksBEARISH 38General

Mercury Systems’ Fixed‑Price Contracts Expose Margins to Semiconductor Cost Volatility

Mercury Systems (MRCY) has disclosed a new risk, in the Sales & Marketing category. Mercury Systems relies heavily on advanced semiconductor and memory components, ...

24d agoSeeking AlphaNEUTRAL 50Earnings

Mercury Systems, Inc. 2026 Q4 - Results - Earnings Call Presentation

2026-08-19. The following slide deck was published by Mercury Systems, Inc.

24d agoYahoo FinanceBEARISH 38Earnings

Why Mercury Systems Stock Is Sinking Today

There were several bright spots in the earnings report. Investors are looking elsewhere.

25d agoYahoo TopNEUTRAL 50Earnings

Mercury Systems, Inc. Q4 2026 Earnings Call Summary

Moby summary of Mercury Systems, Inc.

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More on MRCY: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier MRCY move explainers: 2026-08-25 · 2026-08-21 · 2026-08-20 · 2026-08-19