person · Reporting owner

BRONSON STEVEN N

Disclosed activity across 3 companies

Tapewire entity: 91790
SEC CIK: 0001000383

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
INTERLINK ELECTRONICS INCLINK · Entity 6861	Director · Chairman, President and CEO · 10% owner	October 11, 2023	October 13, 2023
QUALSTAR CORPQBAK · Entity 150845	Director · COB, CEO, President · 10% owner	March 06, 2020	March 10, 2020
RIDGEFIELD ACQUISITION CORPRDGA · Entity 8819	Director · President · 10% owner	April 23, 2024	April 25, 2024

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.

INTERLINK ELECTRONICS INC

Report date October 11, 2023 · Filed October 13, 2023

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	IndirectBy Mr. Bronson's parents	13,115	Reported balance After 2023-10-11 transaction · row 5 Account identity is unresolved; indirect or unspecified ownership is not merged. 1 source row Row 5 · 2023-10-11 · Other · Acquired 13,115 · Balance 13,115 F1: This Form 4 is being filed to reflect the assumption by Mr. Bronson of shared trading control over 13,115 shares held in the account of his parents. F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. In the case of the 206,000 shares held by his former spouse, Mr. Bronson has sole voting and dispositive power.
Common StockSEC Table I · non-derivative	Direct	226,900	Reported balance Holding disclosure · report date 2023-10-11 · row 1 Holding and transaction disclosures are not merged. 1 source row Row 1 · Balance 226,900
Common StockSEC Table I · non-derivative	IndirectBy SB4 Investments LLC	4,022,140	Reported balance Holding disclosure · report date 2023-10-11 · row 2 Holding and transaction disclosures are not merged. 1 source row Row 2 · Balance 4,022,140 F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. In the case of the 206,000 shares held by his former spouse, Mr. Bronson has sole voting and dispositive power.
Common StockSEC Table I · non-derivative	IndirectBy BKF Asset Holdings, Inc.	993,658	Reported balance Holding disclosure · report date 2023-10-11 · row 3 Holding and transaction disclosures are not merged. 1 source row Row 3 · Balance 993,658 F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. In the case of the 206,000 shares held by his former spouse, Mr. Bronson has sole voting and dispositive power.
Common StockSEC Table I · non-derivative	IndirectBy Mr. Bronson's former spouse	206,000	Reported balance Holding disclosure · report date 2023-10-11 · row 4 Holding and transaction disclosures are not merged. 1 source row Row 4 · Balance 206,000 F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. In the case of the 206,000 shares held by his former spouse, Mr. Bronson has sole voting and dispositive power.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 is being filed to reflect the assumption by Mr. Bronson of shared trading control over 13,115 shares held in the account of his parents.

F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. In the case of the 206,000 shares held by his former spouse, Mr. Bronson has sole voting and dispositive power.

QUALSTAR CORP

Report date March 06, 2020 · Filed March 10, 2020

Jointly reported with BKF CAPITAL GROUP INC, BKF Asset Holdings, Inc.

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	39,617	Reported balance After 2020-03-06 transaction · row 1 Joint disclosure: continuity of the reported position is unresolved; see ownership footnotes. 1 source row Row 1 · 2020-03-06 · Exercise / conversion · Acquired 25,000 · Balance 39,617 F1: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F2: Each restricted stock unit represents a contingent right to one share of Qualstar Corporation common stock.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	25,000	Reported balance After 2020-03-06 transaction · row 5 Instrument identity requires review; Table II rows are not merged. 1 source row Row 5 · 2020-03-06 · Exercise / conversion · Disposed 25,000 · Balance 25,000 F2: Each restricted stock unit represents a contingent right to one share of Qualstar Corporation common stock. F5: For each of the fiscal years ended December 31, 2019 and December 31, 2020, RSUs for 25,000 shares of the Company's Common Stock shall vest and become issuable subject to the Company's achievement of financial and performance objectives for the applicable fiscal year established by the Compensation Committee of the Company's Board of Directors. Whether recipient's RSUs for the applicable fiscal year become vested and issuable shall be determined solely in the discretion of the Compensation Committee, or if such committee does not then exist at the time of determination, the Company's Board of Directors (excluding Executive). F6: Subject to Sections 9.7(b) and 9.7(d) of that certain Employment Agreement entered into on April 13, 2019 by and between the Company and Steven N. Bronson, any such RSUs shall not be earned by or vest in recipient until the date such number, if any, is determined by the Compensation Committee. On March 6, 2020, the Company issued to Mr. Bronson 25,000 shares of the Company's Common Stock for the achievement of financial and performance objectives for the fiscal year ended December 31, 2019.
Common StockSEC Table I · non-derivative	IndirectBy BKF Asset Holdings, Inc.	708,286	Reported balance Holding disclosure · report date 2020-03-06 · row 2 Holding and transaction disclosures are not merged. 1 source row Row 2 · Balance 708,286 F1: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F3: Represents shares of common stock owned directly by BKF Holdings. BKF Holdings is wholly owned by BKF Capital. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital and the CEO of BKF Holdings, may be deemed to be the beneficial owner of the shares of Qualstar Corporation held by BKF Holdings.
Common StockSEC Table I · non-derivative	IndirectBy Mr. Bronson's spouse.	10,000	Reported balance Holding disclosure · report date 2020-03-06 · row 3 Holding and transaction disclosures are not merged. 1 source row Row 3 · Balance 10,000 F1: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein.
Common StockSEC Table I · non-derivative	IndirectBy BKF Capital Group, Inc.	708,286	Reported balance Holding disclosure · report date 2020-03-06 · row 4 Holding and transaction disclosures are not merged. 1 source row Row 4 · Balance 708,286 F1: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F4: Represents shares of common stock owned indirectly by BKF Capital through BFK Holdings. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital, may be deemed to be the beneficial owner of the shares of Qualstar Corporation indirectly held by BKF Capital.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein.

F2: Each restricted stock unit represents a contingent right to one share of Qualstar Corporation common stock.

F3: Represents shares of common stock owned directly by BKF Holdings. BKF Holdings is wholly owned by BKF Capital. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital and the CEO of BKF Holdings, may be deemed to be the beneficial owner of the shares of Qualstar Corporation held by BKF Holdings.

F4: Represents shares of common stock owned indirectly by BKF Capital through BFK Holdings. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital, may be deemed to be the beneficial owner of the shares of Qualstar Corporation indirectly held by BKF Capital.

F5: For each of the fiscal years ended December 31, 2019 and December 31, 2020, RSUs for 25,000 shares of the Company's Common Stock shall vest and become issuable subject to the Company's achievement of financial and performance objectives for the applicable fiscal year established by the Compensation Committee of the Company's Board of Directors. Whether recipient's RSUs for the applicable fiscal year become vested and issuable shall be determined solely in the discretion of the Compensation Committee, or if such committee does not then exist at the time of determination, the Company's Board of Directors (excluding Executive).

F6: Subject to Sections 9.7(b) and 9.7(d) of that certain Employment Agreement entered into on April 13, 2019 by and between the Company and Steven N. Bronson, any such RSUs shall not be earned by or vest in recipient until the date such number, if any, is determined by the Compensation Committee. On March 6, 2020, the Company issued to Mr. Bronson 25,000 shares of the Company's Common Stock for the achievement of financial and performance objectives for the fiscal year ended December 31, 2019.

RIDGEFIELD ACQUISITION CORP

Report date April 23, 2024 · Filed April 25, 2024

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	25,007,500	Reported balance After 2024-04-23 transaction · row 1 Account or security details depend on footnotes; rows are not merged. 1 source row Row 1 · 2024-04-23 · Purchase · Acquired 25,000,000 · Balance 25,007,500 F1: This Form 4 omits 711 shares of common stock owned by Mr. Bronson's former spouse and 34,358 shares of common stock owned by Mr. Bronson's parents, which shares previously were reported on Form 4 as indirectly owned by Mr. Bronson. Mr. Bronson has no pecuniary interest in these shares.
Common StockSEC Table I · non-derivative	IndirectBy SB4 Investments LLC	2,629,793	Reported balance Holding disclosure · report date 2024-04-23 · row 2 Holding and transaction disclosures are not merged. 1 source row Row 2 · Balance 2,629,793 F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein. F3: Includes 84,988 shares owned by SB4 Investment LLC that previously were reported on Form 4 as indirectly owned jointly by Mr. Bronson and his former spouse.

Filing footnotes · ownership attribution and instrument terms

F1: This Form 4 omits 711 shares of common stock owned by Mr. Bronson's former spouse and 34,358 shares of common stock owned by Mr. Bronson's parents, which shares previously were reported on Form 4 as indirectly owned by Mr. Bronson. Mr. Bronson has no pecuniary interest in these shares.

F2: Mr. Bronson disclaims beneficial ownership of the shares of common stock except to the extent of his pecuniary interest therein.

F3: Includes 84,988 shares owned by SB4 Investment LLC that previously were reported on Form 4 as indirectly owned jointly by Mr. Bronson and his former spouse.

Transaction history

JSON API

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 date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
August 13, 2018 Filed Aug 15, 2018 17:48 UTC	INTERLINK ELECTRONICS INC LINK · Entity 6861	PurchaseCommon Stock	21,875	$3.50	$76,479.38	Disclosure SEC source: 0001104659-18-052312 · a4.xml · nonDerivative · entry 1 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 4,167,140 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F2 · price: This transaction was executed in multiple trades at prices ranging from $3.45 to $3.50. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected. Read SEC document
December 20, 2017 Filed Dec 20, 2017 19:06 UTC	QUALSTAR CORP QBAK · Entity 150845	PurchaseCommon Stock	3,518	$7.95	$27,973.03	Disclosure SEC source: 0001104659-17-074375 · a4.xml · nonDerivative · entry 4 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Mr. Bronson's spouse. Disclosed balance after: 10,000 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F5 · price: This transaction was executed in multiple trades at prices ranging from $7.92 to $7.9514. The price reported reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder full information regarding the number of shares and prices at which the transaction was effected. Read SEC document
December 20, 2017 Filed Dec 20, 2017 19:06 UTC	QUALSTAR CORP QBAK · Entity 150845	PurchaseCommon Stock	1,482	$7.80	$11,559.60	Disclosure SEC source: 0001104659-17-074375 · a4.xml · nonDerivative · entry 3 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Mr. Bronson's spouse. Disclosed balance after: 6,482 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. Read SEC document
December 18, 2017 Filed Dec 20, 2017 19:06 UTC	QUALSTAR CORP QBAK · Entity 150845	PurchaseCommon Stock	5,000	$7.60	$38,000.00	Disclosure SEC source: 0001104659-17-074375 · a4.xml · nonDerivative · entry 2 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By Mr. Bronson's spouse. Disclosed balance after: 5,000 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. Read SEC document
December 18, 2017 Filed Dec 20, 2017 19:06 UTC	QUALSTAR CORP QBAK · Entity 150845	PurchaseCommon Stock	5,000	$7.50	$37,500.00	Disclosure SEC source: 0001104659-17-074375 · a4.xml · nonDerivative · entry 1 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 14,617 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F4 · balance_after: This Form 4 reflects a one-for-six reverse split of the Reporting Person's common stock which became effective on June 4, 2016. Read SEC document
December 12, 2017 Filed Dec 14, 2017 18:55 UTC	INTERLINK ELECTRONICS INC LINK · Entity 6861	PurchaseCommon Stock	102	$5.10	$520.20	Disclosure SEC source: 0001104659-17-073434 · a4.xml · nonDerivative · entry 1 BRONSON STEVEN N · CIK 0001000383 · Director · COB, CEO, President · 10% owner BKF CAPITAL GROUP INC · CIK 0000009235 · 10% owner BKF Asset Holdings, Inc. · CIK 0001626686 · 10% owner Joint disclosure: these amounts are not allocated separately to each reporting owner. 10b5-1 filing: Not disclosed Ownership: Indirect · By BKF Asset Holdings, Inc. Disclosed balance after: 875,490 F1 · security: This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. F2 · balance_after: Represents shares of common stock owned directly by BKF Holdings. BKF Holdings is wholly owned by BKF Capital. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital and the CEO of BKF Holdings, may be deemed to be the beneficial owner of the shares of Interlink Electronics, Inc. held by BKF Holdings. Read SEC document
August 03, 2017 Filed Aug 7, 2017 17:03 UTC	QUALSTAR CORP QBAK · Entity 150845	GrantStock Option (Right to Buy) · Derivative	100,000	$0.00 Strike: $7.08	$0.00	Disclosure SEC source: 0001104659-17-049936 · a4.xml · derivative · entry 1 BRONSON STEVEN N · CIK 0001000383 · Director · Chief Executive Officer · 10% owner 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 100,000 Underlying: Common Stock · 100,000 shares Expires 2027-08-03 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.