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SELF · Global Self Storage, Inc.

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys10
Open-market sells0
Total purchased$265,539
Unique insiders buying2
Most senior buyerCEO
Avg price paid$5.51
Research cases0
Last filing2026-09-10

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-08-19 — WINMILL & CO. INC · bought 6,877 @ $5.40 2026-08-20 — WINMILL & CO. INC · bought 6,901 @ $5.42 2026-08-21 — WINMILL & CO. INC · bought 7,117 @ $5.45 2026-08-24 — WINMILL & CO. INC · bought 8,022 @ $5.62 2026-08-25 — WINMILL & CO. INC · bought 7,547 @ $5.66 2026-08-26 — WINMILL & CO. INC · bought 7,761 @ $5.64 2026-09-09 — WINMILL MARK CAMPBELL · bought 1,600 @ $5.16 2026-09-09 — WINMILL MARK CAMPBELL · bought 2,058 @ $5.16 2026-09-10 — WINMILL MARK CAMPBELL · bought 292 @ $5.16 2026-09-10 — WINMILL MARK CAMPBELL · bought 50 @ $5.16
2026-08-192026-09-10

Insider cost basis

Share-weighted average price across 10 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$5.16 $5.66
$5.51 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

WINMILL & CO. INC Other
WINMILL MARK CAMPBELL President and CEO, Director
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $SELF is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 10 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-09-10', 'insider_name': 'WINMILL MARK CAMPBELL', 'insider_title': 'President and CEO, Director', 'transaction_type': 'Open-market buy', 'shares': 292.0, 'price': 5.16, 'value': 1506.72, 'is_buy': True}, {'transaction_date': '2026-09-10', 'insider_name': 'WINMILL MARK CAMPBELL', 'insider_title': 'President and CEO, Director', 'transaction_type': 'Open-market buy', 'shares': 50.0, 'price': 5.16, 'value': 258.0, 'is_buy': True}, {'transaction_date': '2026-09-09', 'insider_name': 'WINMILL MARK CAMPBELL', 'insider_title': 'President and CEO, Director', 'transaction_type': 'Open-market buy', 'shares': 1600.0, 'price': 5.16, 'value': 8256.0, 'is_buy': True}, {'transaction_date': '2026-09-09', 'insider_name': 'WINMILL MARK CAMPBELL', 'insider_title': 'President and CEO, Director', 'transaction_type': 'Open-market buy', 'shares': 2058.0, 'price': 5.16, 'value': 10619.28, 'is_buy': True}, {'transaction_date': '2026-08-26', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 7761.0, 'price': 5.64, 'value': 43772.04, 'is_buy': True}, {'transaction_date': '2026-08-25', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 7547.0, 'price': 5.66, 'value': 42716.02, 'is_buy': True}, {'transaction_date': '2026-08-24', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 8022.0, 'price': 5.62, 'value': 45083.64, 'is_buy': True}, {'transaction_date': '2026-08-21', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 7117.0, 'price': 5.45, 'value': 38787.65, 'is_buy': True}, {'transaction_date': '2026-08-20', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 6901.0, 'price': 5.42, 'value': 37403.42, 'is_buy': True}, {'transaction_date': '2026-08-19', 'insider_name': 'WINMILL & CO. INC', 'insider_title': 'Other', 'transaction_type': 'Open-market buy', 'shares': 6877.0, 'price': 5.4, 'value': 37135.8, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for SELF today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

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Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.