TapewireFind a company

person · Reporting owner

STOLPER MARK

Disclosed activity across 5 companies

Tapewire entity
28030
SEC CIK
0001281961

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Coherus Oncology, Inc.CHRS · Entity 6276DirectorJune 03, 2024June 05, 2024
RTI SURGICAL, INC.RTIX · Entity 159205DirectorMarch 08, 2019March 11, 2019
RadNet, Inc.RDNT · Entity 3800EVP, Chief Financial OfficerMarch 03, 2026March 05, 2026
SURGALIGN HOLDINGS, INC.SRGA · Entity 109633DirectorAugust 15, 2022August 17, 2022
Starling Oncology, Inc.TOI · Entity 5327DirectorJuly 27, 2026July 29, 2026

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.

Coherus Oncology, Inc.

Report date June 03, 2024 · Filed June 05, 2024

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $1.76 · Expires 2034-06-03Direct112,000 Reported balance After 2024-06-03 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2024-06-03 · Grant · Acquired 112,000 · Balance 112,000

F1: The underlying shares subject to the option vest and become exercisable as to 100% of the total number of shares subject to the option on the one year anniversary of June 3, 2024, subject to Reporting Person's continued service relationship with the Issuer on such vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: The underlying shares subject to the option vest and become exercisable as to 100% of the total number of shares subject to the option on the one year anniversary of June 3, 2024, subject to Reporting Person's continued service relationship with the Issuer on such vesting date.

RTI SURGICAL, INC.

Report date March 08, 2019 · Filed March 11, 2019

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2019-03-08 transaction · row 1
1 source row

Row 1 · 2019-03-08 · Disposition to issuer · Disposed 66,784 · Balance 0

F1: On March 8, 2019, pursuant to the Master Transaction Agreement, by and among the Issuer, RTI Surgical, Inc., a Delaware corporation ("Old RTI"), PS Spine Holdco, LLC, a Delaware limited liability company (the "Member"), and Bears Merger Sub, Inc., a Delaware corporation (the "Merger Sub"): (a) the Merger Sub merged with and into Old RTI, with Old RTI surviving as a wholly-owned subsidiary of the Issuer (the "Merger"); (b) the Member contributed all of the issued and outstanding membership interests of Paradigm Spine, LLC, a Delaware limited liability company and wholly owned subsidiary of the Member, to the Issuer; and (c) the Issuer was renamed "RTI Surgical Holdings, Inc."

F2: Pursuant to the Master Transaction Agreement, at the effective time of the Merger: (a) each issued and outstanding share of common stock of Old RTI converted automatically into one share of the Issuer's common stock; (b) each issued and outstanding share of Series A Convertible Preferred Stock of Old RTI converted automatically into one share of the Issuer's Series A Convertible Preferred Stock; and (c) each stock option and restricted stock award granted by Old RTI converted into a stock option or restricted stock award, as applicable, of the Issuer with respect to an equivalent number of shares of the Issuer's common stock on the same terms and conditions as were applicable prior to the Closing. This report reflects the beneficial ownership of the reporting person at the time of the consummation of the Merger and does not include the securities of the Issuer acquired by the reporting person upon the consummation of the Merger.

F3: The reporting person will file a Form 4 reflecting his acquisition of the Issuer's securities in connection with the consummation of the Mergers.

F4: Total includes 21,322 shares of restricted stock that will vest on 2/26/2020.

Filing footnotes · ownership attribution and instrument terms

F1: On March 8, 2019, pursuant to the Master Transaction Agreement, by and among the Issuer, RTI Surgical, Inc., a Delaware corporation ("Old RTI"), PS Spine Holdco, LLC, a Delaware limited liability company (the "Member"), and Bears Merger Sub, Inc., a Delaware corporation (the "Merger Sub"): (a) the Merger Sub merged with and into Old RTI, with Old RTI surviving as a wholly-owned subsidiary of the Issuer (the "Merger"); (b) the Member contributed all of the issued and outstanding membership interests of Paradigm Spine, LLC, a Delaware limited liability company and wholly owned subsidiary of the Member, to the Issuer; and (c) the Issuer was renamed "RTI Surgical Holdings, Inc."

F2: Pursuant to the Master Transaction Agreement, at the effective time of the Merger: (a) each issued and outstanding share of common stock of Old RTI converted automatically into one share of the Issuer's common stock; (b) each issued and outstanding share of Series A Convertible Preferred Stock of Old RTI converted automatically into one share of the Issuer's Series A Convertible Preferred Stock; and (c) each stock option and restricted stock award granted by Old RTI converted into a stock option or restricted stock award, as applicable, of the Issuer with respect to an equivalent number of shares of the Issuer's common stock on the same terms and conditions as were applicable prior to the Closing. This report reflects the beneficial ownership of the reporting person at the time of the consummation of the Merger and does not include the securities of the Issuer acquired by the reporting person upon the consummation of the Merger.

F3: The reporting person will file a Form 4 reflecting his acquisition of the Issuer's securities in connection with the consummation of the Mergers.

F4: Total includes 21,322 shares of restricted stock that will vest on 2/26/2020.

RadNet, Inc.

Report date March 03, 2026 · Filed March 05, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect121,943 Reported balance After 2026-03-03 transaction · row 1
1 source row

Row 1 · 2026-03-03 · Grant · Acquired 18,228 · Balance 121,943

F1: Each restricted stock unit ("RSU") represents a contingent right to receive one share of RDNT common stock. Amount reported is net of 1,060 restricted stock awards transferred pursuant to a domestic relations order. Subject to the reporting person's continued service, twenty-percent (20%) of the RSUs will vest on March 10, 2026; the remaining eighty-percent (80%) will vest in three equal annual installments with one-third (1/3) vesting on each of March 10, 2027, 2028, and 2029, or the first business day thereafter if such date falls on a weekend or holiday, respectively. RDNT shares will be delivered to the reporting person in exchange for vested RSUs on the earlier of (i) the reporting person's separation from service, (ii) the reporting person's death or disability, (iii) a change in control of RadNet, or (iv) in equal annual installment payments over five years beginning on January 10, 2028.

Filing footnotes · ownership attribution and instrument terms

F1: Each restricted stock unit ("RSU") represents a contingent right to receive one share of RDNT common stock. Amount reported is net of 1,060 restricted stock awards transferred pursuant to a domestic relations order. Subject to the reporting person's continued service, twenty-percent (20%) of the RSUs will vest on March 10, 2026; the remaining eighty-percent (80%) will vest in three equal annual installments with one-third (1/3) vesting on each of March 10, 2027, 2028, and 2029, or the first business day thereafter if such date falls on a weekend or holiday, respectively. RDNT shares will be delivered to the reporting person in exchange for vested RSUs on the earlier of (i) the reporting person's separation from service, (ii) the reporting person's death or disability, (iii) a change in control of RadNet, or (iv) in equal annual installment payments over five years beginning on January 10, 2028.

SURGALIGN HOLDINGS, INC.

Report date August 15, 2022 · Filed August 17, 2022

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect28,867 Reported balance After 2022-08-15 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2022-08-15 · Grant · Acquired 22,857 · Balance 28,867

F1: Represents shares of restricted stock of Surgalign Holdings, Inc. (the "Company") granted as part of the director compensation program of the Company, all of which will vest on the first anniversary of the date of grant.

F2: The total shares reported reflect 1:30 reverse stock split on May 17, 2022.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares of restricted stock of Surgalign Holdings, Inc. (the "Company") granted as part of the director compensation program of the Company, all of which will vest on the first anniversary of the date of grant.

F2: The total shares reported reflect 1:30 reverse stock split on May 17, 2022.

Starling Oncology, Inc.

Report date July 27, 2026 · Filed July 29, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect56,957 Reported balance After 2026-07-27 transaction · row 1
1 source row

Row 1 · 2026-07-27 · Grant · Acquired 31,124 · Balance 56,957

F1: Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Transaction history

JSON API
Reset

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
February 28, 2018 Filed Mar 1, 2018 12:28 UTC RTI SURGICAL, INC. RTIX · Entity 159205 GrantCommon Stock 17,647 $0.00 $0.00
Disclosure

SEC source: 0001100441-18-000001 · primary_doc.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,462

F1 · shares: Represents shares of restricted stock of RTI Surgical, Inc. (the "Company") granted to Mr. Stolper as part of the director compensation program of the Company, all of which will vest on the first anniversary of the date of grant.

Read SEC document
January 02, 2018 Filed Jan 3, 2018 01:52 UTC RadNet, Inc. RDNT · Entity 3800 GrantRestricted Stock Units · Derivative 21,564 $0.00 $0.00
Disclosure

SEC source: 0001683168-18-000025 · stolper_f4.xml · derivative · entry 2

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 126,065

Underlying: Common Stock · 21,564 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of RDNT common stock.

F3 · derivative.exercise_date: The RSUs vest Jan. 2, 2023. Shares will be delivered to the reporting person in exchange for vested RSUs on Jan 2, 2023.

F3 · derivative.expiration_date: The RSUs vest Jan. 2, 2023. Shares will be delivered to the reporting person in exchange for vested RSUs on Jan 2, 2023.

Read SEC document
January 02, 2018 Filed Jan 3, 2018 01:52 UTC RadNet, Inc. RDNT · Entity 3800 OtherStock Options · Derivative 21,564 Not disclosed Strike: $10.05 Not disclosed
Disclosure

SEC source: 0001683168-18-000025 · stolper_f4.xml · derivative · entry 1

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,666

Underlying: Common Stock · 21,564 shares

Expires 2028-01-02

F1 · price: Issued in connection with retention of employment. Vests 1/3 on first anniversary and 1/3 on each anniversary thereafter.

Read SEC document
August 30, 2017 Filed Aug 30, 2017 21:16 UTC RadNet, Inc. RDNT · Entity 3800 SaleCommon Stock 10,000 $10.19 $101,900.00
Disclosure

SEC source: 0001683168-17-002257 · stolper_f4.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 145,319

Read SEC document
May 24, 2017 Filed May 24, 2017 20:47 UTC RadNet, Inc. RDNT · Entity 3800 SaleCommon Stock 15,000 $7.33 $109,950.00
Disclosure

SEC source: 0001683168-17-001397 · stolper_f4.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,319

Read SEC document
May 16, 2017 Filed May 17, 2017 12:38 UTC RTI SURGICAL, INC. RTIX · Entity 159205 GrantCommon Stock 16,484 $0.00 $0.00
Disclosure

SEC source: 0001100441-17-000012 · primary_doc.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,815

F1 · shares: Represents shares of restricted stock of RTI Surgical, Inc. (the "Company")granted to Mr. Stolper as part of the director compensation program of the Company, all of which will vest on the first anniversary of the date of grant.

Read SEC document
May 05, 2017 Filed May 9, 2017 12:15 UTC RTI SURGICAL, INC. RTIX · Entity 159205 PurchaseCommon Stock 5,000 $4.57 $22,850.00
Disclosure

SEC source: 0001100441-17-000011 · primary_doc.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,331

F1 · shares: Purchased on open market.

Read SEC document
March 14, 2017 Filed Mar 16, 2017 14:00 UTC RTI SURGICAL, INC. RTIX · Entity 159205 GrantCommon Stock 6,331 $0.00 $0.00
Disclosure

SEC source: 0001100441-17-000008 · primary_doc.xml · nonDerivative · entry 1

STOLPER MARK · CIK 0001281961 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,331

F1 · shares: Represents shares of restricted stock of RTI Surgical, Inc.(the Company) granted to Mr. Stolper as part of the director compensation program of the Company, all of which will vest on July 6, 2017.

Read SEC document
January 06, 2017 Filed Jan 9, 2017 17:41 UTC RadNet, Inc. RDNT · Entity 3800 GrantRestricted Stock Units · Derivative 34,399 $0.00 $0.00
Disclosure

SEC source: 0001683168-17-000043 · stolper_f4.xml · derivative · entry 2

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 104,501

Underlying: Common Stock · 34,399 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of RDNT common stock.

F3 · derivative.exercise_date: The RSUs vest Jan. 6, 2022. Shares will be delivered to the reporting person in exchange for vested RSUs on Jan 6, 2022.

F3 · derivative.expiration_date: The RSUs vest Jan. 6, 2022. Shares will be delivered to the reporting person in exchange for vested RSUs on Jan 6, 2022.

Read SEC document
January 06, 2017 Filed Jan 9, 2017 17:41 UTC RadNet, Inc. RDNT · Entity 3800 OtherStock Options · Derivative 34,399 Not disclosed Strike: $6.30 Not disclosed
Disclosure

SEC source: 0001683168-17-000043 · stolper_f4.xml · derivative · entry 1

STOLPER MARK · CIK 0001281961 · Executive VP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,102

Underlying: Common Stock · 34,399 shares

Expires 2027-01-06

F1 · price: Issued in connection with retention of employment. Vests 1/3 on first anniversary and 1/3 on each anniversary thereafter.

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.