Aeluma (ALMU) 10-K: Risk Factors Changes Lead 16 September 2026 Filing Roundup

Aeluma (ALMU)’s Risk Factors section changed the most among 4 companies that filed 10-Ks on 16 September 2026, each compared against its prior-year filing.

Desk:
SEC What Changed — 16 September 2026 10-K filing snapshot
ALMU-21.23%
WSBK+35.79%
EPM-26.08%
MBBC+46.01%

Four companies met our criteria from the four 10-K annual reports filed with the SEC on 16 September 2026. To qualify, a company must have filed an annual 10-K report on the target date and have a prior-year 10-K available for a direct year-over-year comparison.

SEC What Changed Methodology

Each company is scored on how similar its current annual filing text is to the prior year. Scores run from 0 to 1 — a score of 1 means the language is essentially unchanged; a lower score means more has changed. We flag three sections that carry the most disclosure signal: Business, Risk Factors, and MD&A. Recent research suggests that lower scores indicate that a company has made significant changes to their filings, these changes are often buried in the filings. If a company was to report positive news, they would likely do so in the form of a press release or statement on their website. The large changers have often underperformed in the market, while the stable-language filers have earned positive abnormal returns.

Key Takeaways

  • Aeluma, Inc. (Medium) — Aeluma is formalizing cybersecurity oversight as it scales, but it is still relying on outside IT support and admits a serious incident could materially hurt the business.
  • Winchester Bancorp, Inc./MD/ (Medium) — The key message is that Winchester is now operating as a newly organized holding company with pay and risk disclosures that stress profitability, capital strength, and operational discipline.
  • EVOLUTION PETROLEUM CORP (Low) — Evolution Petroleum is still running a dividend-first capital return model, but the higher share count and reduced equity capacity point to gradual dilution.
  • Marathon Bancorp, Inc. /MD/ (Low) — This 10-K is mostly a regulatory housekeeping update, with no material change to Marathon Bancorp’s business outlook or risk profile.

Ranking Table

RankCompanyCIKFull Filing SimilarityBusiness SimilarityRisk Factors SimilarityMD&A SimilarityMost Changed SectionAssessment
1Aeluma, Inc.18288050.9950.8020.1140.977Risk Factorsmedium
2Winchester Bancorp, Inc./MD/20472350.9930.9920.9920.994Risk Factorsmedium
3EVOLUTION PETROLEUM CORP10066550.9950.9950.9950.995Businesslow
4Marathon Bancorp, Inc. /MD/18353850.9970.9990.9991Risk Factorslow

Aeluma, Inc.

Rank1
Lowest similarity sectionRisk Factors
Assessmentmedium
SEC filings2026 10-K HTML/iXBRL (SEC page, raw text) | 2025 10-K HTML/iXBRL (SEC page, raw text)

Aeluma added a much more detailed cybersecurity disclosure, spelling out who oversees the risk, how incidents would be escalated, and how third-party IT support fits into the process. The company also expanded its Business section to show growth in employees and customer-facing activity, including participation in industry consortia. Taken together, the filing reads like a company becoming more operationally mature while acknowledging that cybersecurity remains an active risk.

Main Changes

  • The company added a new cybersecurity governance section saying the Board oversees principal risks, the Audit Committee helps oversee financial reporting and internal controls, and no committee has been given dedicated cybersecurity responsibility.
  • Aeluma now says the CEO has primary responsibility for information technology and cybersecurity risk management, including oversight of its third-party IT services provider.
  • The filing adds a process for significant incidents: management would assess the scope and impact, inform the Board and Audit Committee as appropriate, and decide whether securities-law disclosure is required.
  • The company also states it considers cybersecurity when selecting vendors and that threats continue to evolve, so incidents could still materially affect the business.

Watch Items

  • The added governance detail suggests cybersecurity is becoming a more formal board-level risk, which matters for a company that relies on third-party IT support.
  • Management’s explicit disclosure that a significant incident could trigger board notification and possible disclosure raises the visibility of operational and reputational risk.
  • The Business section shows the company is scaling headcount and commercial activity, which can increase exposure to IT and data-security issues.

Important Filing Changes

2025 filing excerpt – Risk Factors

If product liability lawsuits are brought against us, we may incur substantial liabilities. We face a potential risk of product liability as a result of any of the products that we develop, manufacture and/or offer for sale. For example, we may be sued if any product we develop, manufacture and/or sell allegedly causes injury or is found to be otherwise unsuitable during product testing, manufacturing, marketing, or sale.

2026 filing excerpt – Risk Factors

Risk Factors” for additional information regarding cybersecurity and information technology risks. Cybersecurity Governance Our Board of Directors oversees the principal risks facing the Company as part of its general risk oversight responsibilities.

2025 filing excerpt – Risk Factors

In order to address these risks, the Company must, among other things: ● implement and successfully execute its business strategy; ● provide superior customer service; ● respond to competitive developments; ● attract, retain, and motivate qualified personnel; and ● respond to unforeseen and changing circumstances. The Company cannot make an assurance that it will succeed in addressing these risks. Our failure to raise additional capital or generate cash flows necessary to expand our operations and invest in new enterprises in the future could reduce our ability to compete successfully and harm our results of operations .

2026 filing excerpt – Risk Factors

Risk Factors” for additional information regarding cybersecurity and information technology risks. Cybersecurity Governance Our Board of Directors oversees the principal risks facing the Company as part of its general risk oversight responsibilities. The Audit Committee assists the Board in overseeing financial reporting, internal control and other risk management matters within the scope of its responsibilities.

2025 filing excerpt – Business

Our primary focus is to manufacture high-performance semiconductor technologies that scale for mass markets. Our technology has the potential to impact across mobile, automotive, AI, defense & aerospace, communication, augmented reality (“AR”), virtual reality (“VR”), high-performance computing (“HPC”) and quantum computing applications. Aeluma operates an R&D/manufacturing facility at its headquarters in Goleta, California, and has developed relationships with volume fabrication foundries and packaging partners.

2026 filing excerpt – Business

Overview Aeluma, Inc. (together with our subsidiary, “we,” “our,” “us,” or the “Company”) develops high-performance photonic and electronic technologies for communications and sensing in telecom, artificial intelligence (“AI”) datacom, mobile, defense and aerospace, robotics, automotive, augmented reality/virtual reality (“AR/VR”), and quantum applications. Our proprietary platform combines compound semiconductor materials with large-diameter substrates to leverage manufacturing infrastructure used in high-volume microelectronics.

Winchester Bancorp, Inc./MD/

Rank2
Lowest similarity sectionRisk Factors
Assessmentmedium
SEC filings2026 10-K HTML/iXBRL (SEC page, raw text) | 2025 10-K HTML/iXBRL (SEC page, raw text)

Winchester Bancorp’s filing now clearly frames the company as a newly formed bank holding company created in a mutual holding company reorganization. The risk discussion was refreshed and narrowed, with added emphasis on cyber/information security, employee retention, and the bank’s ability to stay profitable and well capitalized. The filing also introduces a 2025 incentive plan that pays out only if performance and safety-and-soundness targets are met.

Main Changes

  • The Business section now says Winchester Bancorp was "incorporated in December 2024 to become the registered bank holding company of Winchester Savings Bank" as part of a mutual holding company reorganization.
  • The new filing adds a fresh description of the company structure and purpose, replacing the prior shorter business presentation with a more explicit holding-company setup.
  • The risk factor list was streamlined and updated to emphasize current operating risks such as "a failure or breach of our operational or information security systems or infrastructure, including cyberattacks" and "our ability to retain key employees."
  • The annual incentive plan was added, tying bonuses to core net income, deposit growth, loan growth, efficiency, and strategic initiatives, with funding blocked if the bank is not profitable or not well capitalized.

Watch Items

  • The new holding-company structure signals a post-reorganization setup, which can affect governance, capital deployment, and future strategic flexibility.
  • The incentive plan links pay to profitability, growth, and capital strength, suggesting management is prioritizing disciplined execution over pure expansion.
  • The updated risk language highlights cyber and staffing risks, both of which matter for a small bank where operational disruptions can quickly affect earnings.

Important Filing Changes

2025 filing excerpt – Business

Exhibits, Financial Statement Schedules 56 Item 16. Form 10-K Summary 57 i PART I This annual report contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), which can be identified by the use of words such as “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “estimate,” “expect,” “indicate,” “intend,” “may,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would” and words of similar meaning. These forward-looking statements include, but are not limited to: • statements of our goals, intentions and expectations; • statements regarding our business plans, prospects, growth and financial condition and results of operation; • statements regarding the quality of our loan and investment portfolios; and • estimates of our risks and future costs and benefits.

2026 filing excerpt – Business

Exhibits, Financial Statement Schedules 49 Item 16. Form 10-K Summary 50 i PART I This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which can be identified by the use of words such as “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “estimate,” “expect,” “indicate,” “intend,” “may,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would” and words of similar meaning. These forward-looking statements include, but are not limited to: • statements of our goals, intentions and expectations; • statements regarding our business plans, prospects, growth and financial condition and results of operation; • statements regarding the quality of our loan and investment portfolios; and • estimates of our risks and future costs and benefits.

2025 filing excerpt – Business

We are under no duty to and do not take any obligation to update any forward-looking statements after the date of this report. The following factors, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statements: • general economic conditions, including any recessionary conditions and/or increases in unemployment, either nationally or in our market areas, that are worse than expected; • changes in the level and direction of loan delinquencies and write-offs and changes in estimates of and methodology for calculating the adequacy of the allowance for loan losses; • our ability to access cost-effective funding; • fluctuations in real estate values and in the conditions; • demand for loans, deposits and non-banking services in our market area; • our ability to implement and change our business strategies; •…

2026 filing excerpt – Business

We are under no duty to and do not take any obligation to update any forward-looking statements after the date of this report. The following factors, among others, could cause actual results to differ materially from the anticipated results or other expectations expressed in the forward-looking statements: • general economic conditions, nationally or in our market areas; • changes in the level and direction of loan delinquencies and write-offs and changes in estimates of and methodology for calculating the adequacy of the allowance for loan losses; • our ability to access cost-effective funding; • fluctuations in real estate values; • demand for loans, deposits and non-banking services in our market area; • our ability to implement our business strategy; • competition among depository and other financial institutions; • inflation and changes in the interest rate; • changes in laws or government regulations or policies, including changes in monetary and fiscal policies; • the imposition of tariffs or other domestic or international governmental policies and retaliatory responses; • changes in the quality or composition of our loan or investment portfolios; • a failure or breach of our operational or information security systems or infrastructure, including cyberattacks; • changes in accounting policies and practices; • our ability to retain key employees; • and the other risks and uncertainties detailed in Item 1A. "Risk Factors". Winchester Bancorp, Inc. (the “Company”, "we", "our", "us") is a Maryland corporation that was incorporated in December 2024 to become the registered bank holding company of Winchester Savings Bank (the “Bank”) as part of the mutual holding company reorganization of the Bank, which was completed on April 30, 2025.

2025 filing excerpt – Risk Factors

Exhibits, Financial Statement Schedules 56 Item 16. Form 10-K Summary 57 i PART I This annual report contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”), which can be identified by the use of words such as “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “estimate,” “expect,” “indicate,” “intend,” “may,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would” and words of similar meaning. These forward-looking statements include, but are not limited to: • statements of our goals, intentions and expectations; • statements regarding our business plans, prospects, growth and financial condition and results of operation; • statements regarding the quality of our loan and investment portfolios; and • estimates of our risks and future costs and benefits.

2026 filing excerpt – Risk Factors

Exhibits, Financial Statement Schedules 49 Item 16. Form 10-K Summary 50 i PART I This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which can be identified by the use of words such as “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “estimate,” “expect,” “indicate,” “intend,” “may,” “plan,” “project,” “seek,” “should,” “target,” “will,” “would” and words of similar meaning. These forward-looking statements include, but are not limited to: • statements of our goals, intentions and expectations; • statements regarding our business plans, prospects, growth and financial condition and results of operation; • statements regarding the quality of our loan and investment portfolios; and • estimates of our risks and future costs and benefits.

EVOLUTION PETROLEUM CORP

Rank3
Lowest similarity sectionBusiness
Assessmentlow
SEC filings2026 10-K HTML/iXBRL (SEC page, raw text) | 2025 10-K HTML/iXBRL (SEC page, raw text)

Evolution Petroleum’s filing shows a mostly steady story: the quarterly dividend stayed at $0.12 and the company extended its consecutive dividend record. The main balance-sheet-style change is a higher share count and less room left under equity compensation plans, which points to modest dilution rather than a strategic shift. There were no share repurchases in the latest year.

Main Changes

  • Shares outstanding increased to 35,949,843 from 34,337,188 year over year, reflecting a larger equity base.
  • The company kept its quarterly dividend at $0.12 per share and extended the streak to 51 consecutive quarterly dividends from 47.
  • Equity compensation activity declined: contingent rights to shares fell to 140,479 from 241,613, and shares available for future grants dropped to 2,061,776 from 2,462,908.
  • The company reported no issuer repurchases in the latest year, versus employee tax-withholding share receipts in the prior year.

Watch Items

  • The unchanged dividend signals management still prioritizes shareholder returns, which supports the stock’s income profile.
  • The higher share count and lower remaining equity authorization suggest ongoing dilution risk, though not an immediate red flag.
  • No buybacks means dividends remain the main capital return lever, so free cash flow and commodity prices still matter most.

Important Filing Changes

2025 filing excerpt – Business

Business and in Note 4, “Property and Equipment” and our Supplemental Disclosure about Oil and Natural Gas Properties (unaudited) to our consolidated financial statements in Item 8. Risks and uncertainties The oil and natural gas industry is a global market impacted by many factors, such as government regulations, particularly in the areas of tariffs, trade sanctions, taxation, energy, climate change and the environment, geopolitical instability and armed conflicts (including between Russia and Ukraine and in the Middle East between Israel and Gaza), demand in Asian and European markets, and the extent to which members of OPEC and other oil exporting nations manage oil supply through export quotas. Natural gas prices are generally determined by North American supply and demand and are also affected by imports and exports of liquefied natural gas.

2026 filing excerpt – Business

Business and in Note 4, “Property and Equipment” and our Supplemental Disclosure about Oil and Natural Gas Properties (unaudited) to our consolidated financial statements in Item 8. Risks and uncertainties The oil and natural gas industry is a global market impacted by many factors, such as government regulations, particularly in the areas of tariffs, trade sanctions, taxation, energy, climate change and the environment, geopolitical instability, (including ongoing conflicts between Russia and Ukraine, in the Middle East and Venezuela), demand in Asian and European markets, and the extent to which members of OPEC and other oil exporting nations manage oil supply through export quotas. More recently, during the third fiscal quarter, WTI oil prices reached their highest levels since 2022 due to crude oil disruptions at key oil shipping routes in the Middle East, including the Strait of Hormuz.

2025 filing excerpt – Business

The amount we realize for our production depends predominantly upon commodity prices, which are affected by changes in market demand and supply, as impacted by overall economic activity, weather, inventory storage levels, basis differentials and other factors. While crude oil and NGL prices decreased 11.5% and 0.1% from the prior fiscal year respectively, our average realized commodity prices, realized natural gas prices increased 7.3% from the prior fiscal year predominately due to favorable pricing recognized from our SCOOP/STACK properties. Average daily equivalent production increased 4.2% from 6,790 BOEPD to 7,074 BOEPD in the current fiscal year as a result of additional production from newly drilled wells at Chaveroo Field, the Tex Mex Acquisition in April 2025, and drilling activities that are ongoing at SCOOP/STACK since the prior year end.

2026 filing excerpt – Business

Risks and uncertainties The oil and natural gas industry is a global market impacted by many factors, such as government regulations, particularly in the areas of tariffs, trade sanctions, taxation, energy, climate change and the environment, geopolitical instability, (including ongoing conflicts between Russia and Ukraine, in the Middle East and Venezuela), demand in Asian and European markets, and the extent to which members of OPEC and other oil exporting nations manage oil supply through export quotas. More recently, during the third fiscal quarter, WTI oil prices reached their highest levels since 2022 due to crude oil disruptions at key oil shipping routes in the Middle East, including the Strait of Hormuz. Natural gas prices are generally determined by North American supply and demand and are also affected by imports and exports of liquefied natural gas.

2025 filing excerpt – Risk Factors

As of June 30, 2025, we have granted 3.2 million equity awards under the 2016 Plan and 2.5 million shares of common stock remain available for future grants. Management’s Discussion and Analysis of Financial Condition and Results of Operations Executive Overview Liquidity and Capital Resources Results of Operations Critical Accounting Policies and Estimates Executive Overview General Evolution Petroleum Corporation is an independent energy company focused on maximizing total returns to its shareholders through the ownership of and investment in onshore oil and natural gas properties in the United States. In support of that objective, our long-term goal is to maximize total shareholder return from a diversified portfolio of long-life oil and natural gas properties built through acquisitions and through selective development opportunities, production enhancements, and other exploitation efforts on our oil and natural gas properties.

2026 filing excerpt – Risk Factors

As of June 30, 2026, we have granted 3.6 million equity awards under the 2016 Plan and 2.1 million shares of common stock remain available for future grants. Management’s Discussion and Analysis of Financial Condition and Results of Operations Executive Overview Liquidity and Capital Resources Results of Operations Critical Accounting Policies and Estimates Executive Overview General We are an independent energy company focused on acquiring and developing long-lived oil and natural gas properties in the United States. Our diversified portfolio consists primarily of non-operated working interests and mineral and royalty interests across several leading producing basins.

Marathon Bancorp, Inc. /MD/

Rank4
Lowest similarity sectionRisk Factors
Assessmentlow
SEC filings2026 10-K HTML/iXBRL (SEC page, raw text) | 2025 10-K HTML/iXBRL (SEC page, raw text)

Marathon Bancorp did not disclose a new business strategy or a new operating risk in this comparison. The main update is extra discussion of SEC proposals that could simplify filer categories and allow semiannual reporting in the future, but those rules are not in effect yet. The filing still says the company is a smaller reporting company and that Item 1A risk factors are not required.

No material section-level wording change was large enough to quote from the compared sections.

Why SEC Filing Changes Matter

Research by Cohen et al. (Lazy Prices, 2020) — using the complete history of SEC filings from 1995 to 2014 — shows that when firms make active changes to their annual disclosures, those changes convey an important signal about future operations and returns. A portfolio that shorted "changers" and bought "non-changers" earned over 22% per year in annual alpha historically. Changes to the Risk Factors section, Business description, and language referring to the executive team were especially informative. Critically, these returns accrued gradually as information was later revealed through news and earnings — not at the time of filing — suggesting many investors remain inattentive to these simple, public signals. This snapshot is a starting point for deeper investigation, not a buy or sell recommendation.

For more like this, see the full SEC What Changed archive, browse more equity research reports, or subscribe to Quantitative Research Notes for new filing-change alerts as soon as they publish.

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Research disclaimer

This material is provided for research and educational purposes only. It is not investment advice, a recommendation, or an offer to buy or sell any security or strategy.

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