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Mark Campbell Winmill

Insider · President and CEO · SELF

Mark Campbell Winmill files insider transactions with the SEC as a president and ceo of Global Self Storage. We hold 3 disclosed purchases and sales filed since 21 March 2006, 2 of them in the last 90 days.

  • Files for 4 companiesSELF, GIFD, BXL, TUX
  • Disclosed buys and sells3 in all, 2 in the last 90 days
  • Last disclosure11 September 2026

Positions held

4 posts we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 23 May 2016 — 10 September 2026President and CEO · Global Self Storage 93 Form 4 lines · source: SEC Form 4
  • Filed 7 March 2012 — 27 March 2012Other role · Global Income Fund 6 Form 4 lines · source: SEC Form 4
  • Filed 3 October 2006 — 19 September 200710% owner · Bexil 3 Form 4 lines · source: SEC Form 4
  • Filed 17 March 2006 — 2 November 2006President · Tuxis 8 Form 4 lines · source: SEC Form 4

Every transaction

110 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing
110 of 110 shown
10 Sep 202611 Sep 2026SEC Form 41 dbought on the open marketGlobal Self Storage50 sharesdown −0.8%up +0.0%
10 Sep 202611 Sep 2026SEC Form 41 dbought on the open marketGlobal Self Storage292 sharesdown −0.8%up +0.0%
9 Sep 202611 Sep 2026SEC Form 42 dbought on the open marketGlobal Self Storage1,600 sharesdown −1.0%up +0.0%
9 Sep 202611 Sep 2026SEC Form 42 dbought on the open marketGlobal Self Storage2,058 sharesdown −1.0%up +0.0%
14 May 202615 May 2026SEC Form 41 dbought on the open marketGlobal Self Storage4,000 sharesdown −4.1%down −3.2%
24 Mar 202625 Mar 2026SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.2%down −1.0%
24 Mar 202625 Mar 2026SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.2%down −1.0%
24 Mar 202625 Mar 2026SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.2%down −1.0%
24 Mar 202625 Mar 2026SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.2%down −1.0%
5 Dec 20255 Dec 2025SEC Form 40 dbought on the open marketGlobal Self Storage800 sharesup +2.4%up +2.4%
5 Dec 20255 Dec 2025SEC Form 40 dbought on the open marketGlobal Self Storage3,600 sharesup +2.4%up +2.4%
4 Dec 20255 Dec 2025SEC Form 41 dbought on the open marketGlobal Self Storage6,000 sharesup +1.0%up +2.4%
3 Dec 20255 Dec 2025SEC Form 42 dbought on the open marketGlobal Self Storage6,000 sharesdown −0.8%up +2.4%
19 May 202520 May 2025SEC Form 41 dbought on the open marketGlobal Self Storage10,000 sharesdown −9.9%down −10.4%
25 Mar 202526 Mar 2025SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.6%up +0.6%
25 Mar 202526 Mar 2025SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +0.6%up +0.6%
30 May 202430 May 2024SEC Form 40 dbought on the open marketGlobal Self Storage20,000 sharesup +2.6%up +2.6%
28 May 202430 May 2024SEC Form 42 dbought on the open marketGlobal Self Storage2,400 sharesup +3.0%up +2.6%
28 May 202430 May 2024SEC Form 42 dbought on the open marketGlobal Self Storage24 sharesup +3.0%up +2.6%
28 May 202430 May 2024SEC Form 42 dbought on the open marketGlobal Self Storage375 sharesup +3.0%up +2.6%
28 May 202430 May 2024SEC Form 42 dbought on the open marketGlobal Self Storage100 sharesup +3.0%up +2.6%
25 Mar 202426 Mar 2024SEC Form 41 dwas grantednot a tradeGlobal Self Storage12,672 sharesup +18.3%up +15.3%
25 Mar 202426 Mar 2024SEC Form 41 dwas grantednot a tradeGlobal Self Storage3,467 sharesup +18.3%up +15.3%
25 Mar 202426 Mar 2024SEC Form 41 dwas grantednot a tradeGlobal Self Storage38,054 sharesup +18.3%up +15.3%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,200 sharesup +6.5%up +8.5%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage489 sharesup +6.5%up +8.5%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,511 sharesup +6.5%up +8.5%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage2,000 sharesup +6.5%up +8.5%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +6.5%up +8.5%
16 Nov 202317 Nov 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +6.5%up +8.5%
17 Aug 202318 Aug 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +0.8%up +1.4%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,500 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage745 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage100 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage655 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage200 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,300 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,500 sharesdown −0.6%down −1.0%
15 May 202316 May 2023SEC Form 41 dbought on the open marketGlobal Self Storage1,800 sharesdown −0.6%down −1.0%
27 Mar 202329 Mar 2023SEC Form 42 dwas grantednot a tradeGlobal Self Storage12,672 sharesdown −0.0%down −0.2%
27 Mar 202329 Mar 2023SEC Form 42 dwas grantednot a tradeGlobal Self Storage2,093 sharesdown −0.0%down −0.2%
18 Nov 202221 Nov 2022SEC Form 43 dbought on the open marketGlobal Self Storage100 sharesdown −1.4%down −1.7%
18 Nov 202221 Nov 2022SEC Form 43 dbought on the open marketGlobal Self Storage900 sharesdown −1.4%down −1.7%
18 Nov 202221 Nov 2022SEC Form 43 dbought on the open marketGlobal Self Storage1,100 sharesdown −1.4%down −1.7%
18 Nov 202221 Nov 2022SEC Form 43 dbought on the open marketGlobal Self Storage900 sharesdown −1.4%down −1.7%
23 Aug 202224 Aug 2022SEC Form 41 dbought on the open marketGlobal Self Storage1,400 sharesdown −16.0%down −17.0%
23 Aug 202224 Aug 2022SEC Form 41 dbought on the open marketGlobal Self Storage1,400 sharesdown −16.0%down −17.0%
23 Aug 202224 Aug 2022SEC Form 41 dbought on the open marketGlobal Self Storage1,400 sharesdown −16.0%down −17.0%
23 Aug 202224 Aug 2022SEC Form 41 dbought on the open marketGlobal Self Storage600 sharesdown −16.0%down −17.0%
20 May 202223 May 2022SEC Form 43 dbought on the open marketGlobal Self Storage1,700 sharesdown −11.0%down −9.4%
28 Mar 202229 Mar 2022SEC Form 41 dwas grantednot a tradeGlobal Self Storage8,025 sharesdown −7.4%down −9.9%
24 Aug 202125 Aug 2021SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +1.2%down −1.4%
20 Aug 202124 Aug 2021SEC Form 44 dbought on the open marketGlobal Self Storage1,000 sharesup +0.4%up +1.2%
20 Aug 202124 Aug 2021SEC Form 44 dbought on the open marketGlobal Self Storage1,000 sharesup +0.4%up +1.2%
20 Aug 202124 Aug 2021SEC Form 44 dbought on the open marketGlobal Self Storage1,000 sharesup +0.4%up +1.2%
20 Aug 202124 Aug 2021SEC Form 44 dbought on the open marketGlobal Self Storage1,000 sharesup +0.4%up +1.2%
25 Mar 202126 Mar 2021SEC Form 41 dreturned to the issuernot a tradeGlobal Self Storage6,988 sharesup +13.3%up +8.3%
25 Mar 202126 Mar 2021SEC Form 41 dwas grantednot a tradeGlobal Self Storage8,025 sharesup +13.3%up +8.3%
25 Mar 202126 Mar 2021SEC Form 41 dwas grantednot a tradeGlobal Self Storage24,100 sharesup +13.3%up +8.3%
20 Nov 202023 Nov 2020SEC Form 43 dbought on the open marketGlobal Self Storage2,000 sharesup +27.8%up +28.1%
20 Nov 202023 Nov 2020SEC Form 43 dbought on the open marketGlobal Self Storage500 sharesup +27.8%up +28.1%
19 Nov 202023 Nov 2020SEC Form 44 dbought on the open marketGlobal Self Storage3,000 sharesup +28.1%up +28.1%
19 Nov 202023 Nov 2020SEC Form 44 dbought on the open marketGlobal Self Storage3,000 sharesup +28.1%up +28.1%
19 Nov 202023 Nov 2020SEC Form 44 dbought on the open marketGlobal Self Storage1,000 sharesup +28.1%up +28.1%
19 Nov 202023 Nov 2020SEC Form 44 dbought on the open marketGlobal Self Storage500 sharesup +28.1%up +28.1%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage1,000 sharesup +30.4%up +30.4%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage700 sharesup +30.4%up +30.4%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage300 sharesup +30.4%up +30.4%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage3,000 sharesup +30.4%up +30.4%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage77 sharesup +30.4%up +30.4%
19 Aug 202021 Aug 2020SEC Form 42 dbought on the open marketGlobal Self Storage1,923 sharesup +30.4%up +30.4%
31 Jul 20204 Aug 2020SEC Form 44 dacquired or disposed of by willnot a tradeGlobal Self Storage11,999 sharesup +36.6%up +34.1%
20 May 202021 May 2020SEC Form 41 dbought on the open marketGlobal Self Storage2,000 sharesup +36.6%up +39.2%
20 May 202021 May 2020SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +36.6%up +39.2%
20 May 202021 May 2020SEC Form 41 dbought on the open marketGlobal Self Storage550 sharesup +36.6%up +39.2%
26 Mar 202026 Mar 2020SEC Form 40 dwas grantednot a tradeGlobal Self Storage8,025 sharesup +42.7%up +42.7%
13 Dec 201917 Dec 2019SEC Form 44 dexercised in-the-money optionsnot a tradeGlobal Self Storagederivative21,308 sharesup +20.2%up +16.4%
13 Dec 201917 Dec 2019SEC Form 44 dexercised in-the-money optionsnot a tradeGlobal Self Storage7,667 sharesup +20.2%up +16.4%
28 May 201929 May 2019SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +38.5%up +39.6%
28 May 201929 May 2019SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +38.5%up +39.6%
27 Mar 201929 Mar 2019SEC Form 42 dwas grantednot a tradeGlobal Self Storage8,025 sharesup +29.7%up +32.4%
27 Mar 201929 Mar 2019SEC Form 42 dwas grantednot a tradeGlobal Self Storage6,724 sharesup +29.7%up +32.4%
18 May 201821 May 2018SEC Form 43 dbought on the open marketGlobal Self Storage1,400 sharesup +22.8%up +22.0%
29 Mar 20182 Apr 2018SEC Form 44 dwas grantednot a tradeGlobal Self Storage24,100 sharesup +15.6%up +16.7%
29 Mar 20182 Apr 2018SEC Form 44 dwas grantednot a tradeGlobal Self Storage8,025 sharesup +15.6%up +16.7%
23 Aug 201724 Aug 2017SEC Form 41 dbought on the open marketGlobal Self Storage2,000 sharesup +6.9%up +3.2%
23 Aug 201724 Aug 2017SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +6.9%up +3.2%
30 Nov 20161 Dec 2016SEC Form 41 dbought on the open marketGlobal Self Storage1,000 sharesup +2.4%up +4.5%
23 Aug 201626 Aug 2016SEC Form 43 dbought on the open marketGlobal Self Storage2,000 sharesdown −5.5%down −7.1%
26 May 201627 May 2016SEC Form 41 dbought on the open marketGlobal Self Storage190 sharesup +2.2%up +2.8%
25 May 201626 May 2016SEC Form 41 dbought on the open marketGlobal Self Storage200 sharesup +6.2%up +2.2%
24 May 201625 May 2016SEC Form 41 dbought on the open marketGlobal Self Storage5,829 sharesup +8.0%up +6.2%
23 May 201625 May 2016SEC Form 42 dbought on the open marketGlobal Self Storage1,000 sharesup +9.9%up +6.2%
27 Mar 201228 Mar 2012SEC Form 41 dbought on the open marketGlobal Income Fund2,380 sharesup +27.1%up +26.8%
26 Mar 201228 Mar 2012SEC Form 42 dbought on the open marketGlobal Income Fund7,620 sharesup +25.6%up +26.8%
16 Mar 201219 Mar 2012SEC Form 43 dbought on the open marketGlobal Income Fund841 sharesup +27.1%up +26.5%
15 Mar 201219 Mar 2012SEC Form 44 dbought on the open marketGlobal Income Fund1,000 sharesup +25.2%up +26.5%
9 Mar 201213 Mar 2012SEC Form 44 dbought on the open marketGlobal Income Fund2,400 sharesup +27.4%up +26.5%
7 Mar 20129 Mar 2012SEC Form 42 dbought on the open marketGlobal Income Fund5,000 sharesup +27.8%up +27.4%
19 Sep 200721 Sep 2007SEC Form 42 dsold on the open marketBexil1,750 shares——
12 Feb 200715 May 2007SEC Form 492 dsold on the open marketBexil250 shares——
2 Nov 20063 Nov 2006SEC Form 41 dbought on the open marketTUXTuxis500 shares——
1 Nov 20063 Nov 2006SEC Form 42 dbought on the open marketTUXTuxis600 shares——
3 Oct 20064 Oct 2006SEC Form 41 dsold on the open marketBexil500 shares——
10 Aug 200614 Aug 2006SEC Form 44 dwas grantednot a tradeTUXTuxisderivative14,900 shares——
10 Aug 200614 Aug 2006SEC Form 44 dwas grantednot a tradeTUXTuxisderivative14,900 shares——
10 Aug 200614 Aug 2006SEC Form 44 dwas grantednot a tradeTUXTuxisderivative14,900 shares——
10 Aug 200614 Aug 2006SEC Form 44 dwas grantednot a tradeTUXTuxisderivative5,300 shares——
23 Mar 200627 Mar 2006SEC Form 44 dbought on the open marketTUXTuxis2,000 shares——
17 Mar 200621 Mar 2006SEC Form 44 dbought on the open marketTUXTuxis3,000 shares——

Both percentages are the stock’s move, not Mark Campbell Winmill’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. 99 of the 110 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.