Form4insider filings, from the source

Company · CIK 0001585389 · SIC 6798 — Real Estate Investment Trusts · NYSE

SmartStop Self Storage REIT, Inc. · SMA

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $91k · 5net −$91k
$10k$10k$100k$100k$1M$1MbuyssalesSep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 16, 2026 SForm 4 →Sep 17, 4:52 pm EDTDavid J MuellerDirector425$32.05$13,6214,215−9.16%10b5-1
Aug 17, 2026 SForm 4 →Aug 18, 4:43 pm EDTDavid J MuellerDirector425$33.70$14,3234,640−8.39%10b5-1
Aug 14, 2026 SForm 4 →Aug 18, 4:36 pm EDTNicholas LookGeneral Counsel and Secretary1,025$34.36$35,219588−63.5%
Jul 16, 2026 SForm 4 →Jul 16, 5:14 pm EDTDavid J MuellerDirector425$33.38$14,1875,065−7.74%10b5-1
Jun 23, 2026 AForm 4 →Jun 25, 4:36 pm EDTTimothy S. MorrisDirector3,075——18,253—
Jun 16, 2026 SForm 4 →Jun 17, 8:23 pm EDTDavid J MuellerDirector425$32.44$13,7875,490−7.19%10b5-1

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 23, 2026 AForm 4 →Jun 25, 4:47 pm EDTHarold PerryDirector3,230——9,024—
Jun 23, 2026 AForm 4 →Jun 25, 4:41 pm EDTDavid J MuellerDirector3,230——10,464—
Jun 23, 2026 AForm 4 →Jun 25, 4:31 pm EDTLora A. GotchevaDirector3,075——5,861—