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DB

David R. Brennan

Insider · Director · INSM

David R. Brennan files insider transactions with the SEC as a director of Insmed. We hold 1 disclosed purchase or sale filed since 2 June 2014, 1 of them in the last 90 days.

  • Files for 3 companiesINSM, ALXN, INNL
  • Disclosed buys and sells1 in all, 1 in the last 90 days
  • Last disclosure11 September 2026

Positions held

3 posts we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 29 May 2014 — 9 September 2026Director · Insmed 21 Form 4 lines · source: SEC Form 4
  • Filed 22 July 2014 — 21 July 2021Director · Alexion Pharmaceuticals 19 Form 4 lines · source: SEC Form 4
  • Filed 24 July 2017 — 24 July 2017Director · Innocoll Holdings 4 Form 4 lines · source: SEC Form 4

Every transaction

44 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing
44 of 44 shown
9 Sep 202611 Sep 2026SEC Form 42 dsold on the open marketInsmed25,000 sharesup +0.5%up +0.0%
13 May 202615 May 2026SEC Form 42 dwas grantednot a tradeInsmed3,305 sharesup +9.7%up +18.6%
23 Feb 202625 Feb 2026SEC Form 42 dgave awaynot a tradeInsmed6,000 sharesdown −18.6%down −12.9%
23 Feb 202625 Feb 2026SEC Form 42 dgave awaynot a tradeInsmed6,000 sharesdown −18.6%down −12.9%
6 Nov 202510 Nov 2025SEC Form 44 dgave awaynot a tradeInsmed60,000 sharesdown −30.3%down −32.6%
6 Nov 202510 Nov 2025SEC Form 44 dgave awaynot a tradeInsmed60,000 sharesdown −30.3%down −32.6%
15 May 202519 May 2025SEC Form 44 dwas grantednot a tradeInsmed5,058 sharesup +92.5%up +90.6%
13 May 202415 May 2024SEC Form 42 dwas grantednot a tradeInsmed13,162 sharesup +401.0%up +419.1%
11 May 202315 May 2023SEC Form 44 dwas grantednot a tradeInsmed13,192 sharesup +582.9%up +571.6%
11 May 202213 May 2022SEC Form 42 dwas grantednot a tradeInsmed14,645 sharesup +658.1%up +611.4%
1 Nov 20213 Nov 2021SEC Form 42 dbought on the open marketInsmed10,000 sharesup +316.8%up +299.2%
21 Jul 202123 Jul 2021SEC Form 42 dreturned to the issuernot a tradeALXNAlexion Pharmaceuticals20,873 shares——
21 Jul 202123 Jul 2021SEC Form 42 dreturned to the issuernot a tradeALXNAlexion Pharmaceuticalsderivative2,343 shares——
21 Jul 202123 Jul 2021SEC Form 42 dreturned to the issuernot a tradeALXNAlexion Pharmaceuticalsderivative2,706 shares——
21 Jul 202123 Jul 2021SEC Form 42 dreturned to the issuernot a tradeALXNAlexion Pharmaceuticalsderivative2,294 shares——
20 May 202124 May 2021SEC Form 44 dwas grantednot a tradeALXNAlexion Pharmaceuticals1,962 shares——
20 May 202124 May 2021SEC Form 44 dwas grantednot a tradeALXNAlexion Pharmaceuticals1,374 shares——
12 May 202114 May 2021SEC Form 42 dwas grantednot a tradeInsmed7,558 sharesup +389.1%up +393.4%
14 May 202018 May 2020SEC Form 44 dwas grantednot a tradeALXNAlexion Pharmaceuticals3,468 shares——
14 May 202018 May 2020SEC Form 44 dwas grantednot a tradeALXNAlexion Pharmaceuticals2,428 shares——
12 May 202014 May 2020SEC Form 42 dwas grantednot a tradeInsmed8,097 sharesup +423.9%up +444.4%
15 May 201917 May 2019SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals2,726 shares——
15 May 201917 May 2019SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals1,908 shares——
15 May 201916 May 2019SEC Form 41 dwas grantednot a tradeInsmed6,899 sharesup +346.4%up +341.2%
15 May 201817 May 2018SEC Form 42 dwas grantednot a tradeInsmed6,066 sharesup +375.8%up +360.0%
9 May 201811 May 2018SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals2,174 shares——
24 Jul 201726 Jul 2017SEC Form 42 dreturned to the issuernot a tradeINNLInnocoll Holdings237,440 shares——
24 Jul 201726 Jul 2017SEC Form 42 dreturned to the issuernot a tradeINNLInnocoll Holdingsderivative11,659 shares——
24 Jul 201726 Jul 2017SEC Form 42 dreturned to the issuernot a tradeINNLInnocoll Holdingsderivative8,230 shares——
24 Jul 201726 Jul 2017SEC Form 42 dreturned to the issuernot a tradeINNLInnocoll Holdingsderivative14,907 shares——
17 May 201719 May 2017SEC Form 42 dwas grantednot a tradeInsmed6,702 sharesup +654.1%up +655.5%
10 May 201712 May 2017SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals2,030 shares——
11 May 201619 May 2016SEC Form 48 dwas grantednot a tradeALXNAlexion Pharmaceuticals835 shares——
11 May 201619 May 2016SEC Form 48 dwas grantednot a tradeALXNAlexion Pharmaceuticalsderivative2,294 shares——
29 May 20152 Jun 2015SEC Form 44 dexercised options overnot a tradeInsmed2,690 sharesup +489.8%up +478.8%
29 May 20152 Jun 2015SEC Form 44 dexercised options overnot a tradeInsmedderivative2,690 sharesup +489.8%up +478.8%
19 May 201523 May 2016SEC Form 4370 dwas grantednot a tradeInsmed12,742 sharesup +464.4%up +1041.2%
6 May 20158 May 2015SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals700 shares——
6 May 20158 May 2015SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticalsderivative2,343 shares——
8 Jan 20159 Jan 2015SEC Form 41 dwas grantednot a tradeInsmed6,222 sharesup +705.3%up +732.2%
15 Dec 201416 Dec 2014SEC Form 41 dbought on the open marketALXNAlexion Pharmaceuticals500 shares——
22 Jul 201424 Jul 2014SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticals768 shares——
22 Jul 201424 Jul 2014SEC Form 42 dwas grantednot a tradeALXNAlexion Pharmaceuticalsderivative2,706 shares——
29 May 20142 Jun 2014SEC Form 44 dwas grantednot a tradeInsmedderivative2,690 sharesup +875.9%up +928.7%

Both percentages are the stock’s move, not David R. Brennan’s return: a disclosure gives a band, never an amount, so nobody can say how much was bought or what it made. They run to the last close we hold — 11 Sep 2026, except where a name has since delisted, when the row names its own last session. We publish no close, no volume and no dollar figure behind them. 21 of the 44 rows shown carry a percentage; the rest are dashes with the reason on the row.

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.

Some filings reach us as photographs of paper rather than as a form we can read as text. Those are shown here only once they have been read and checked, so this page can hold fewer lines than the filings behind it contain. The link on every row opens the original document, which is always the full record.