Ownership blocker
An ownership blocker is a clause that stops a holder from converting or exercising if doing so would push its beneficial ownership above a set limit, typically 4.99% or 9.99% of the common stock.
Last verifiedHow it works
Warrants, pre-funded warrants, convertible notes and convertible preferred stock often include a "beneficial ownership limitation". The holder cannot exercise or convert to the extent that, afterwards, it (with its affiliates) would beneficially own more than a stated percentage of the outstanding common stock. The limit is commonly 4.99%, sometimes 9.99%, and many agreements let the holder raise it (up to 9.99%) on 61 days' notice.
Why it exists
Crossing 5% beneficial ownership of a registered class triggers Schedule 13D or 13G filings; crossing 10% can make a holder an insider subject to Section 16 short-swing profit rules. Staying under these thresholds avoids those obligations. Some exchange rules on change of control are also relevant.
Why it matters
A blocker does not reduce the total number of shares a holder can eventually receive; it controls the pace. A holder at its limit typically sells some common stock, falls back under the cap, then converts or exercises again. In financings with large share counts, this can produce a steady cycle of conversion and selling rather than one large block.
Worked example
Hypothetical: Company X has 50,000,000 shares outstanding. A holder owns 1,000,000 shares and pre-funded warrants for 6,000,000 more, with a 4.99% blocker. Solving 1,000,000 + x = 4.99% × (50,000,000 + x), it can exercise about 1,573,500 warrants now, ending with roughly 2,573,500 of 51,573,500 shares. To exercise the rest, it must sell shares first.
How to spot it
Search the warrant or note exhibit for "Beneficial Ownership Limitation". In a 13G, holders often state that their reported percentage reflects a blocker and excludes unexercisable securities. See Ownership blockers.
Guides that use this term
- Warrant Overhang: How to Count Shares Not Issued YetWhat warrant overhang is, how to total it from the warrant table in a 10-Q, and how cash, cashless and pre-funded exercises change the eventual share count.
- Equity Line of Credit (ELOC) Financing ExplainedHow an equity line of credit (ELOC) works, and why share caps, volume limits, ownership blockers and falling prices keep proceeds far below the headline amount.
- Beneficial Ownership Blockers: 4.99% and 9.99% CapsHow 4.99% and 9.99% beneficial ownership blockers cap a holder's stake at any moment but not total dilution, explained with a worked convert-and-sell cycle.
- Prepaid Advance Agreements: How They Become SharesHow a prepaid advance agreement works: cash up front repaid in discounted shares, and how the discount, lookback, floor and triggers set the share count.
- Concurrent Private Placement Warrants ExplainedWhat concurrent private placement warrants are, why registered direct offerings pair with unregistered warrants, and how to count the shares they add later.
- How to Find Selling Shareholders and Placement AgentsCounterparty disclosures in a prospectus or 8-K: how to identify the holder, placement agent and selling shareholders, what each is paid and what each can sell.
Related terms
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Definition from the Signal8 Academy glossary. Educational content only. DilutionScan and Signal8 are not broker-dealers or investment advisers, and nothing here is a recommendation to buy or sell any security.