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Insider · CIK 0001256553

Thompson Mark D

CIK 0001256553 Name as filed on the most recent filing

Filed as Thompson Mark D (13)

52 transaction lines · from 13 filings · filed 2003-08-04 to 2018-02-07 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-21 05:23 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

52 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-21 05:23 UTC.

Transactions filed by this insider
Direction Date Issuer Code Shares Price Value USD Filing
2018-02-06 Cambridge Bancorp
CATC 		P, Open-market purchase 1,400 acquired 78.00 109,200.00 Form 4, filing 0001593968-18-000289
2017-12-08 Cambridge Bancorp
CATC 		P, Open-market purchase 1,357 acquired 73.75 100,080.11 Form 4, filing 0001144204-17-063306
2014-01-31 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 28,949 disposed 12.45 360,530.85 Form 4, filing 0000821127-14-000030
2014-01-31 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 18,004 acquired 12.42 223,609.68 Form 4, filing 0000821127-14-000030
2013-09-12 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 5,774 acquired 10.67 61,608.58 Form 4, filing 0001127602-13-027133
2013-09-12 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 3,826 acquired 10.65 40,758.38 Form 4, filing 0001127602-13-027133
2013-09-12 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 400 acquired 10.64 4,256.00 Form 4, filing 0001127602-13-027133
2013-09-10 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 20,000 acquired 10.60 212,000.00 Form 4, filing 0001127602-13-026888
2013-05-15 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 22,125 disposed 9.87 218,413.58 Form 4, filing 0001127602-13-017406
2013-04-01 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 6,208 disposed 9.70 60,218.84 Form 4, filing 0001127602-13-013244
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 7,886 acquired 6.43 50,706.98 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 7,700 acquired 6.46 49,742.00 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 6,681 acquired 6.44 43,025.64 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 5,719 acquired 6.45 36,887.55 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 1,972 acquired 6.42 12,660.24 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 1,500 acquired 6.44 9,652.50 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 1,100 acquired 6.44 7,089.50 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 900 acquired 6.46 5,818.50 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 800 acquired 6.42 5,140.00 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 600 acquired 6.46 3,873.00 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 600 acquired 6.45 3,869.88 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 300 acquired 6.43 1,928.76 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.46 1,291.84 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.45 1,289.94 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.45 1,289.90 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.44 1,287.96 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.43 1,285.86 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 161 acquired 6.43 1,035.21 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 135 acquired 6.44 869.20 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.46 645.99 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.46 645.96 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.46 645.91 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.46 645.89 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.45 644.99 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.45 644.96 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.45 644.88 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.45 644.87 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.45 644.85 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.44 643.89 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.43 642.89 Form 4, filing 0001127602-11-017528
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 6,500 acquired 6.47 42,055.00 Form 4, filing 0001127602-11-017529
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.47 1,293.96 Form 4, filing 0001127602-11-017529
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.47 1,293.88 Form 4, filing 0001127602-11-017529
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 200 acquired 6.47 1,293.72 Form 4, filing 0001127602-11-017529
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.47 646.93 Form 4, filing 0001127602-11-017529
2011-05-23 Boston Private Financial Holdings Inc
BPFH 		P, Open-market purchase 100 acquired 6.47 646.90 Form 4, filing 0001127602-11-017529
2007-04-16 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 10,875 disposed 27.83 302,629.50 Form 4, filing 0001127602-07-001414
2006-05-01 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 9,000 disposed 33.00 297,000.00 Form 4, filing 0001127602-06-001077
2005-02-18 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 10,000 disposed 26.39 263,900.00 Form 4, filing 0001256553-05-000003
2005-02-18 Boston Private Financial Holdings Inc
BPFH 		S, Open-market sale 500 disposed 26.35 13,175.00 Form 4, filing 0001256553-05-000003

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Search the catalog
Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 43
  • Open-market sale 9
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. THOMPSON MARK D, insider transactions. Retrieved 2026-08-21 from https://ebomi.com/insider/0001256553

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

This page as JSON The JSON twin is shaped by the same read model as this page, so the two cannot disagree. Its envelope carries the canonical URL, the retrieval time, the coverage claim, and the licence statement.