LOS ANGELES, May  27, 2026  (GLOBE NEWSWIRE) -- The Portnoy Law Firm advises York Space Systems, (&#34;YORK&#34; or the &#34;Company&#34;) (NYSE:YSS) investors that the firm has initiated an investigation into possible

York Space Systems Investigated by the Portnoy Law Firm

York Space Systems faces legal scrutiny as Portnoy law firm opens securities investigation

<section class="insight" data-version="1">
  <section data-block="information">
    <h3>Information</h3>
    <p>LOS ANGELES, May  27, 2026  (GLOBE NEWSWIRE) -- The Portnoy Law Firm advises York Space Systems, (&amp;#34;YORK&amp;#34; or the &amp;#34;Company&amp;#34;) (NYSE:YSS) investors that the firm has initiated an investigation into possible</p>
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  <section data-block="ai-summary-paragraph">
    <h3>AI Summary</h3>
    <p>The Portnoy Law Firm announced it is investigating possible securities fraud tied to York Space Systems&#039; IPO and Q1 margin issues. The disclosure triggered a roughly 17% intraday stock drop after margins fell to 19% and revenue timing shifted, creating a potential valuation overhang until clarity emerges.</p>
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  <section data-block="ai-summary-bullets">
    <h3>Key Points</h3>
    <ul><li>Portnoy Law Firm opens securities investigation into York Space Systems; potential class action risk.</li><li>IPO: 18.5M shares priced at $34 in Jan 2026; margins fading.</li><li>Q1 2026 gross margin at 19%, down 4 pts YoY; EAC headwind.</li><li>Revenue timing shifts; 2Q revenue expected to slip to 3Q/4Q.</li></ul>
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  <section data-block="companies-mentioned">
    <h3>Companies Mentioned</h3>
    <ul><li><strong>York Space Systems (YSS)</strong>: Subject of investigation; IPO details and margin issues affect valuation and sentiment.</li><li><strong>The Portnoy Law Firm (N/A)</strong>: Issuer of the securities-fraud investigation; potential class action risk; no direct ticker.</li></ul>
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  <section data-block="category">
    <h3>Legal</h3>
    <p>Category: Legal. The piece centers on an investor securities investigation; relevant to YSS due to potential legal/valuation impact and market perception.</p>
  </section>

  <section data-block="market-moving">
    <h3>Market-Moving</h3>
    <ul><li>Portnoy Law Firm investigation introduces near-term price volatility for YSS.</li><li>Q1 2026 gross margin at 19% vs prior year; EAC adjustments negative.</li><li>2Q revenue timing shifted to 3Q/4Q, delaying visibility.</li><li>YSS stock down ~17% after May 14 earnings commentary; downside risk persists.</li></ul>
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  <section data-block="key-facts">
    <h3>Key Facts</h3>
    <ul><li>IPO finalized January 2026: 18.5 million shares at $34 per share.</li><li>Q1 2026 gross margin: 19%, down 4 percentage points YoY.</li><li>EAC adjustments attributed to ~1 point of margin decline year-over-year.</li><li>Revenue timing: some 2Q revenue delayed into 3Q/4Q.</li><li>Stock price decline: down $4.92 to $24.02 on May 15, 2026 (from $28.94 on May 14).</li></ul>
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  <section data-block="trading-thesis">
    <h3>Trading Thesis</h3>
    <p>Near-term downside risk remains elevated on legal overhang unless concrete facts or a filing materialize; assess for clarity within 3–6 months.</p>
  </section>
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<link type="text/css" rel="stylesheet" href="https://www.globenewswire.com/styles/gnw_nitf.css"></link><p>LOS ANGELES, May  27, 2026  (GLOBE NEWSWIRE) -- <a href="https://www.globenewswire.com/Tracker?data=HK5ZHfdIn4mG8QhKm2CiU6XRL7V1LjWeaQaiUat-BD8udU1PgnD6klWzwpL0G_YsoFF3Si_A4Y_a31J70937LEGVXciAGVz7k4peF2rPMYjW-KGopsDktCB-FQQU2kG6" rel="nofollow" target="_blank"><em>The Portnoy Law Firm</em></a> advises York Space Systems, (&#34;YORK&#34; or the &#34;Company&#34;) (NYSE:<a class="ticker" href="https://www.benzinga.com/quote/YSS">YSS</a>) investors that the firm has initiated an investigation into possible securities fraud, and may file a class action on behalf of investors. </p>  <p>Investors are encouraged to contact attorney <a href="https://www.globenewswire.com/Tracker?data=gtIif80ZfLWGYc73hawYJQXXyvyGCUIk_2NO51aUhzSn4l2MWuJgu0nThSZAFES_mSvPxYzqS4wIS6y2cArVNxp1XE4cVXfmaikhNE1YlmrjewbwQZMKdvPol0rQpbv1" rel="nofollow" target="_blank">Lesley F. Portnoy</a>, by phone 844-767-8529 or <a href="https://www.globenewswire.com/Tracker?data=T0oWp689BVqOZcbOKT2rfdsQ9-79R8bi6f1PSB566tlXWtMqvadDmuXjT18dlQMA6D_BDxU4l2S9JreY7fBJzADaEfDSBGHXzquV3Ywa840=" rel="nofollow" target="_blank">email</a>: <a href="mailto:lesley@portnoylaw.com">lesley@portnoylaw.com</a>, to discuss their legal rights, or join the case via <a href="https://www.globenewswire.com/Tracker?data=how2sEU-_m_4M7o790tZ5CVW9vEfM4X9GlkJKQF-asYx9iYP4PQm9AW8Nhk0NjpU2d0ctkkR3AzyZ93DUFWI-8PmGVI2br_v_VS4pFvqRhgQAhLNkRKPbDP6tzU3HuJApJszXlWpbPiDyA7j0IcfkQ==" rel="nofollow" target="_blank">https://portnoylaw.com/york-space-systems</a>. The Portnoy Law Firm can provide a complimentary case evaluation and discuss investors' options for pursuing claims to recover their losses.</p>  <p style="padding-left:0pt;">In January 2026, York Space Systems finalized its initial public offering ("IPO"), offering 18,500,000 shares of stock at $34 per share. Throughout the IPO process, York marketed itself as a space and defense enterprise featuring scalable satellite manufacturing operations, highlighting an ability to provide mission-critical spacecraft "at scale, faster, and at lower cost." Furthermore, the Company stressed its high-rate production capabilities, clear revenue visibility, and anticipated margin expansion.</p>  <p style="padding-left:0pt;">During its first-quarter 2026 earnings call on May 14, 2026, York Space Systems (referred to in the call as York Space Station) revealed that its gross margin had dropped to "19%, down 4 percentage points year on year." Management attributed this decline to estimate at completion ("EAC") adjustments, noting they represented "a tailwind last year and a headwind this year." An EAC serves as an accounting metric to project the total projected costs and labor hours needed to finalize a long-term contract or manufacturing cycle. The Company conceded that "the first quarter EAC change, it was negative," explaining that the adjustment would result in "a little bit of material cost and a little bit of labor cost" increases. York Space Systems additionally confirmed that this EAC adjustment was responsible for "about 1 point of the 4 points of margin decline year-over-year." Management also addressed revenue timing delays, noting that "a little bit of our 2Q revenue that we were planning to hit in 2Q will just be delayed into 3Q, likely 3Q, potentially some of that into 4Q."</p>  <p style="padding-left:0pt;">Driven by these disclosures, York Space Systems&#39; stock price fell by $4.92 per share, or roughly 17%, decreasing from $28.94 per share on May 14, 2026, to close at $24.02 per share on May 15, 2026.</p>  <p>The Portnoy Law Firm represents investors in pursuing claims caused by corporate wrongdoing. The Firm's founding partner has recovered over $5.5 billion for aggrieved investors. Attorney advertising. Prior results do not guarantee similar outcomes.</p>  <p>Lesley F. Portnoy, Esq.<br></br>Admitted CA, NY and TX Bar<br></br><a href="https://www.globenewswire.com/Tracker?data=yMXdYbnh6jVd1Rutck2817JFLBmakM_GP3Ekmgng0IL81b5GW-EqF7lkRNEMXAfnHGdJqEaMQfNo434QfIwrBu7rGGqcLV6d86K6viyyf1A=" rel="nofollow" target="_blank">lesley@portnoylaw.com</a><br></br>310-692-8883<br></br>www.portnoylaw.com</p>  <p>Attorney Advertising</p> <img alt="" class="__GNW8366DE3E__IMG" src="https://www.globenewswire.com/newsroom/ti?nf=OTcyNzQ0OCM3NjIzNzE4IzIxOTU1Mjc="></img> <br></br><img alt="" src="https://ml.globenewswire.com/media/NDQ0NDY5MWItNTI0Yy00Njc5LWExMjYtYjc3ZjA5MWQ1ZjM4LTEyMDcwODAtMjAyNi0wNS0yNy1lbg==/tiny/Portnoy-Law.png" referrerpolicy="no-referrer-when-downgrade"></img><p><a href="https://www.globenewswire.com/NewsRoom/AttachmentNg/ea0dd9c0-6e41-4d5a-ad27-b277677af6df"><img src="https://ml.globenewswire.com/media/ea0dd9c0-6e41-4d5a-ad27-b277677af6df/small/portnoylaw-logohighresroundlogoonly-jpg.jpg" border="0" width="150" height="144" alt="Primary Logo"></img></a></p>

The Portnoy Law Firm announced it is investigating possible securities fraud tied to York Space Systems' IPO and Q1 margin issues. The disclosure triggered a roughly 17% intraday stock drop after margins fell to 19% and revenue timing shifted, creating a potential valuation overhang until clarity emerges.

York Space Systems Investigated by the Portnoy Law Firm

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Market-Moving

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Companies Mentioned

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