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person · Reporting owner

Mainz Barry

Disclosed activity across 2 companies

Tapewire entity
18112
SEC CIK
0001388839

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
BLACKBERRY LtdBB · Entity 3966DirectorAugust 31, 2026September 01, 2026
MOBILEIRON, INC.MOBL · Entity 144913Director · President and CEOAugust 24, 2017August 28, 2017

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

BLACKBERRY Ltd

Report date August 31, 2026 · Filed September 01, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Deferred Share UnitSEC Table II · derivative / convertible securityDirect93,263 Reported balance After 2026-08-31 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-08-31 · Grant · Acquired 9,433 · Balance 93,263

F1: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Filing footnotes · ownership attribution and instrument terms

F1: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

MOBILEIRON, INC.

Report date August 24, 2017 · Filed August 28, 2017

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect1,092,217 Reported balance After 2017-08-24 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2017-08-24 · Tax withholding · Disposed 31,543 · Balance 1,092,217

F1: The Reporting Person previously made an irrevocable election effective as of February 10, 2017 to sell only the number of shares of common stock necessary to cover the federal, state, local, and foreign tax withholding obligations, as well as related brokerage commission fees.

F2: Includes 4,000 shares acquired under the MobileIron, Inc. 2014 Employee Stock Purchase Plan on August 15, 2017.

Filing footnotes · ownership attribution and instrument terms

F1: The Reporting Person previously made an irrevocable election effective as of February 10, 2017 to sell only the number of shares of common stock necessary to cover the federal, state, local, and foreign tax withholding obligations, as well as related brokerage commission fees.

F2: Includes 4,000 shares acquired under the MobileIron, Inc. 2014 Employee Stock Purchase Plan on August 15, 2017.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 31, 2026 Filed Sep 1, 2026 21:11 UTC BLACKBERRY Ltd BB · Entity 3966 GrantDeferred Share Unit · Derivative 9,433 Not disclosed Not disclosed
Disclosure

SEC source: 0001070235-26-000108 · wk-form4_1788297112.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,263

Underlying: Common Shares · 9,433 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.exercise_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.expiration_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Read SEC document
May 31, 2026 Filed Jun 1, 2026 21:02 UTC BLACKBERRY Ltd BB · Entity 3966 GrantDeferred Share Unit · Derivative 8,541 Not disclosed Not disclosed
Disclosure

SEC source: 0001070235-26-000063 · wk-form4_1780347751.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,830

Underlying: Common Shares · 8,541 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.exercise_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.expiration_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Read SEC document
February 28, 2026 Filed Mar 3, 2026 21:35 UTC BLACKBERRY Ltd BB · Entity 3966 GrantDeferred Share Unit · Derivative 22,567 Not disclosed Not disclosed
Disclosure

SEC source: 0001070235-26-000013 · wk-form4_1772573730.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,289

Underlying: Common Shares · 22,567 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.exercise_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.expiration_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Read SEC document
November 30, 2025 Filed Dec 1, 2025 21:54 UTC BLACKBERRY Ltd BB · Entity 3966 GrantDeferred Share Unit · Derivative 18,382 Not disclosed Not disclosed
Disclosure

SEC source: 0001070235-25-000192 · wk-form4_1764626092.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,722

Underlying: Common Shares · 18,382 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.exercise_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.expiration_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Read SEC document
August 31, 2025 Filed Sep 3, 2025 21:21 UTC BLACKBERRY Ltd BB · Entity 3966 GrantDeferred Share Unit · Derivative 34,340 Not disclosed Not disclosed
Disclosure

SEC source: 0001070235-25-000166 · wk-form4_1756934473.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,340

Underlying: Common Shares · 34,340 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · price: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.exercise_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

F1 · derivative.expiration_date: Each Deferred Share Unit ("DSU") is the economic equivalent of one common share. The DSUs become payable, in cash or common shares or a combination of the two, at the discretion of BlackBerry Limited ("BlackBerry") following cessation of the reporting person's service as a director of BlackBerry.

Read SEC document
August 24, 2017 Filed Aug 28, 2017 16:26 UTC MOBILEIRON, INC. MOBL · Entity 144913 Tax withholdingCommon Stock 31,543 $3.87 $122,099.80
Disclosure

SEC source: 0001209191-17-050385 · doc4.xml · nonDerivative · entry 1

Mainz Barry · CIK 0001388839 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,092,217

F1 · shares: The Reporting Person previously made an irrevocable election effective as of February 10, 2017 to sell only the number of shares of common stock necessary to cover the federal, state, local, and foreign tax withholding obligations, as well as related brokerage commission fees.

F2 · balance_after: Includes 4,000 shares acquired under the MobileIron, Inc. 2014 Employee Stock Purchase Plan on August 15, 2017.

Read SEC document
May 25, 2017 Filed May 26, 2017 18:00 UTC MOBILEIRON, INC. MOBL · Entity 144913 Tax withholdingCommon Stock 32,810 $5.27 $172,823.39
Disclosure

SEC source: 0001209191-17-035986 · doc4.xml · nonDerivative · entry 1

Mainz Barry · CIK 0001388839 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,119,760

F1 · shares: The Reporting Person previously made an irrevocable election effective as of February 10, 2017 to sell only the number of shares of common stock necessary to cover the federal, state, local, and foreign tax withholding obligations, as well as related brokerage commission fees.

Read SEC document
February 27, 2017 Filed Mar 1, 2017 19:50 UTC MOBILEIRON, INC. MOBL · Entity 144913 Tax withholdingCommon Stock 66,630 $4.70 $313,081.04
Disclosure

SEC source: 0001209191-17-016173 · doc4.xml · nonDerivative · entry 1

Mainz Barry · CIK 0001388839 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,152,570

F1 · shares: The Reporting Person previously made an irrevocable election effective as of February 10, 2017 to sell only the number of shares of common stock necessary to cover the federal, state, local, and foreign tax withholding obligations, as well as related brokerage commission fees.

F2 · balance_after: Includes 4,000 shares acquired under the MobileIron, Inc. 2014 Employee Stock Purchase Plan on February 15, 2017.

Read SEC document
February 10, 2017 Filed Feb 10, 2017 19:48 UTC MOBILEIRON, INC. MOBL · Entity 144913 GrantStock Option (Right to Buy) · Derivative 100,000 $0.00 Strike: $4.90 $0.00
Disclosure

SEC source: 0001209191-17-009788 · doc4.xml · derivative · entry 1

Mainz Barry · CIK 0001388839 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 shares

Expires 2027-02-09

F1 · derivative.exercise_date: 1/48th of such shares subject to the Option will vest and become exercisable monthly over 4 years measured from the one month anniversary of February 10, 2017, subject to Reporting Person's continued service with the Company. This option is subject to acceleration upon certain events as provided in the Executive Employment Agreement between the Issuer and Reporting Person.

Read SEC document
January 31, 2017 Filed Feb 2, 2017 19:22 UTC MOBILEIRON, INC. MOBL · Entity 144913 GrantCommon Stock 400,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-17-007320 · doc4.xml · nonDerivative · entry 1

Mainz Barry · CIK 0001388839 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,215,200

F1 · shares: Represents restricted stock units ("RSUs"). The RSUs will initially vest as to 6.25% of the total number of RSUs on May 20, 2017 (the "Initial Quarterly Vesting Date"), subject to his continued employment on the Initial Quarterly Vesting Date. Thereafter, the remaining RSUs will vest ratably with 6.25% of the total RSUs vesting on each subsequent Quarterly Vesting Date, as defined below, until the RSUs are vested in full, subject to his continued employment on each such Quarterly Vesting Date. The Quarterly Vesting Dates are February 20, May 20, August 20 and November 20 of each year.

F2 · balance_after: Includes 4,000 shares acquired under the Issuer's Employee Stock Purchase Plan on August 15, 2016.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.