What SEC filings does Nautilus Biotechnology, Inc. submit to the SEC?

Nautilus Biotechnology, Inc. (NAUT) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about NAUT?

A Form 4 for NAUT discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Nautilus Biotechnology, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for NAUT?

The 10-K is Nautilus Biotechnology, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all NAUT SEC filings directly on EDGAR?

You can view all historical Nautilus Biotechnology, Inc. filings on the SEC EDGAR company page for NAUT. Each filing card on this page links directly to the original SEC document.

How often does Nautilus Biotechnology, Inc. file with the SEC?

Nautilus Biotechnology, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling NAUT shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

NAUT SEC Filing News — Nautilus Biotechnology, Inc.

Latest SEC filings for Nautilus Biotechnology, Inc. (NAUT) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-11.

Nautilus Biotechnology, Inc., a development stage life sciences company, engages in creating a platform technology for quantifying and unlocking the complexity of the proteome in the United States. The company develops Nautilus Voyager Platform, which includes an end-to-end solution comprising instruments, reagents, consumables, and software analysis. It also provides nautilus voyager instrument, a high-resolution optical imaging system with integrated fluidics and liquid handling sub-system to …

Sector: Healthcare Industry: Biotechnology Market Cap: $297.8M

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

What you're looking at: Each item below is parsed from an actual SEC filing submitted by Nautilus Biotechnology, Inc.. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.

NAUT Filing Activity Snapshot 2026-03-04 — 2026-09-11

Insider Transactions (Form 4)

1 buy vs 1 sell

Insider buying and selling activity is balanced in this period.

Largest Form 144 Filing

$11.75M

AH Equity Partners Bio II, L.L.C. (10% Owner) · 2026-06-04

5,000,000 shares · Form 4

Insider Transactions 14 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 14 filings in this group are Form 4s for Nautilus Biotechnology, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 14 insider filings shown, the breakdown is 12 compensation award, 1 open-market purchase and 1 open-market sale. 2 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×12: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market purchase ×1: The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Open-market sale ×1: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Compensation award Tax / Compensation Filing 2026-06-22

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Posard Matthew L. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	45,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Posard Matthew L. (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-22

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

NAZEM FARZAD (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	45,000	—	—

Filing: Form 4 (Insider Transaction) Insider: NAZEM FARZAD (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-22

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Akinsanya Karen (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	45,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Akinsanya Karen (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-22

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

McIlwain Matthew S (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	45,000	—	—

Filing: Form 4 (Insider Transaction) Insider: McIlwain Matthew S (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-06-22

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Epperly Melissa B, (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	45,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Epperly Melissa B, (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-04

NAUT insider AH Equity Partners Bio II, L.L.C. (10% Owner) sold 5,000,000 shares (~$11.75M)

AH Equity Partners Bio II, L.L.C., listed as 10% Owner at Nautilus Biotechnology, Inc., reported an open-market sale of 5,000,000 NAUT shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	4,615,974	$2.35	$10.85M
`S`	Open-market sale	384,026	$2.35	$902.5K

Filing: Form 4 (Insider Transaction) Insider: AH Equity Partners Bio II, L.L.C. (10% Owner) Shares: 5,000,000 Est. Value: $11.75M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market purchase Insider Buying 2026-03-04

NAUT insider Patel Sujal M (Director, CEO, President, and Secretary, 10% Owner) bought 25,000 shares (~$65.2K)

Patel Sujal M, listed as Director, CEO, President, and Secretary, 10% Owner at Nautilus Biotechnology, Inc., reported an open-market purchase of 25,000 NAUT shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.

The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`P`	Open-market purchase	25,000	$2.61	$65.2K

Filing: Form 4 (Insider Transaction) Insider: Patel Sujal M (Director, CEO, President, and Secretary, 10% Owner) Shares: 25,000 Est. Value: $65.2K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Mowry Anna (CFO and Treasurer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	160,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Mowry Anna (CFO and Treasurer)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Mallick Parag (Director, Chief Scientist, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	280,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Mallick Parag (Director, Chief Scientist, 10% Owner)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Patel Sujal M (Director, CEO, President, and Secretary, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	650,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Patel Sujal M (Director, CEO, President, and Secretary, 10% Owner)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Sankar Subramanian (Senior VP, Product Development) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	160,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Sankar Subramanian (Senior VP, Product Development)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Weld Gwen E (Chief People Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	160,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Weld Gwen E (Chief People Officer)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Murphy Matthew B. (General Counsel) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	160,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Murphy Matthew B. (General Counsel)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-03-04

NAUT insider Form 4 filed for equity award, exercise, or tax withholding

Suzuki Kentaro (Chief Marketing Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Stock Option (Right to Buy)	160,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Suzuki Kentaro (Chief Marketing Officer)

View on SEC EDGAR → Open Filing Document →

Material Events 4 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 4 in this period for Nautilus Biotechnology, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-09-11

NAUT filed 8-K — material company event

Nautilus Biotechnology, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-07-28

NAUT filed 8-K — material company event

Nautilus Biotechnology, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-06-18

NAUT filed 8-K — material company event

Nautilus Biotechnology, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Form 8-K Material Company Update 2026-04-28

NAUT filed 8-K — material company event

Nautilus Biotechnology, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

Periodic Reports 2 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 2 quarterly reports (10-Q) for Nautilus Biotechnology, Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-07-28

NAUT filed Quarterly Report (10-Q)

Nautilus Biotechnology, Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

Form 10-Q Quarterly Report 2026-04-28

NAUT filed Quarterly Report (10-Q)

Nautilus Biotechnology, Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)

View on SEC EDGAR → Open Filing Document →

How we classify Nautilus Biotechnology, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on NAUT. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — NAUT SEC Filings

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NAUT Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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