Velarion · Company Intelligence
Compensation Brief
Fiscal year 2025 · Filings through 2026-06-16

Global Self Storage, Inc. (SELF)

Fiscal year 2025 executive and director compensation, incentive-plan design, equity activity, and governance — every figure in this brief is traceable to its exact location in the company’s SEC filing — the document, the section, the page, and the table, linked directly.

$693,476
Mark Winmill total, FY2025
CEO pay percentile vs peers
CEO-to-median pay ratio
74%
Say-on-pay support, latest vote
Companies that benchmark against SELF
1 company names SELF as a compensation peer

Each company listed discloses SELF in its own benchmarking peer group, as disclosed in each company's most recent proxy statement within the last two proxy seasons. Two companies are therefore absent by design: one that named SELF in an earlier year and no longer does, and one whose own most recent disclosure is older than the last two seasons.

01

Summary Compensation Table — fiscal year 2025

Named executive officerSalaryBonusStock awardsOption awardsNon-equity incentivePension / NQDCAll otherTotal
Mark Winmill$467,000$17,962$128,748$0$0$0$79,766$693,476
Chief Executive Officer and President
Donald Klimoski198,0867,49456,15400034,301296,035
Senior Vice President - Operations, General Counsel, Secretary, and Chief Compliance Officer
Thomas O'Malley211,5469,33256,15400012,242289,274
Chief Financial Officer, Chief Accounting Officer, Treasurer, and Senior Vice President

A dash means the company reported no figure in that column; 0 means it reported zero. Figures are as printed in the filing, without adjustment.

Three-year trend — total compensation per named executive

Named executive officerFY2025 totalFY2024 totalFY2023 totalΔ FY20242025
Mark Winmill$693,476$813,323$593,068−119,847
Donald Klimoski296,035348,399−52,364
Thomas O'Malley289,274274,910

Prior-year totals as disclosed in the corresponding proxy; deltas are computed values with the derivation shown in the register.

02

Equity transactions since the proxy statement was filed

Every insider equity transaction reported on Form 4 after the 2025 proxy statement — acquisitions, dispositions, exercises, and withholdings — and therefore not reflected in any table in that document.

InsiderRoleTransaction dateCodeSharesPriceValueSecuritySource
Russell E. Burke IIIDirector2026-05-12A94$5$499CommonForm 4 ↗
William C. ZacharyDirector2026-05-12A945499CommonForm 4 ↗
Mark Campbell WinmillDirector2026-05-14A4,000521,320CommonForm 4 ↗

Transaction codes per Form 4: A acquisition · S open-market sale · F tax withholding · M option exercise · G gift. Value = shares × price as reported. Dividend-equivalent and fractional-share accrual rows (derivative Class A, under $10,000 and under 2,000 shares) are aggregated per date; every row appears in full below.

03

Grants of plan-based awards — fiscal year 2025

ExecutiveAwardGrant dateThresholdTargetGrantedMaximumGrant-date fair value
Thomas O'MalleyPSU$56,154
Mark WinmillPSU128,748
Donald KlimoskiPSU56,154
03b

Vehicle mix — grant-date fair value by award type

Named executive officerTime-vested (RSU)Performance-vested (PSU)Options / SARs% performance-vested
Thomas O'Malley$0$56,154$0100.0%
Mark Winmill0128,7480100.0%
Donald Klimoski056,1540100.0%

% performance-vested = PSU grant-date fair value ÷ (RSU + PSU + Options), a computed value with the derivation shown in the register.

04

Outstanding equity awards at fiscal year-end 2025

ExecutiveAwardShares unvestedExercise priceMarket value unvested
Donald KlimoskiPSU17,675$90,143
Thomas O'MalleyPSU17,67590,143
Thomas O'MalleyPSU9,23747,109
Donald KlimoskiPSU9,23747,109
Mark WinmillPSU40,525206,672
Mark WinmillPSU21,405109,166
05

Incentive-plan design — the Compensation Discussion & Analysis

One of the primary objectives of the Compensation Committee is to ensure that the Company provides a competitive and comprehensive compensation program that allows us to attract and retain qualified and talented individuals who possess the skills and expertise necessary to lead, manage and grow the Company and who are accountable for the performance of the Company.

CEO STI target (% of salary)
CEO LTI target (% of salary)
Independent consultantWillis Towers Watson
Clawback policytrue
Anti-hedgingfalse
Anti-pledgingfalse
06

Say-on-pay — recent advisory votes

Meeting yearMeeting dateForAgainstAbstainSupportOutcome
20262026-06-163,710,1661,303,88270,92374%Passed
20252025-06-093,212,459720,32081,24681.68%Passed
20242024-06-053,206,646742,486224,90181.2%Passed
20232023-06-063,021,850366,239115,07889.19%Passed
20202020-06-123,056,222910,721167,95677.04%Passed

Rows are labeled by annual-meeting year, with the meeting date beside each; the vote held in a given year acts on the prior fiscal year's compensation.

Say-on-pay — history, company's computation

Meeting yearMeeting dateApproval — company's computation
20262026-06-1674%a
20252025-06-0981.68%b
20242024-06-0581.2%c

a. Approved under the standard stated in the filing — “Abstentions are not votes cast and will have no effect on the result of the vote on this proposal, although they will be considered present for the purpose of determining the presence of a quorum.”.

b. Approved under the standard stated in the filing — “Abstentions are not votes cast and will have no effect on the result of the vote on this proposal, although they will be considered present for the purpose of determining the presence of a quorum.”.

c. Approved under the standard stated in the filing — “Abstentions are not votes cast and will have no effect on the result of the vote on this proposal, although they will be considered present for the purpose of determining the presence of a quorum.”.

Approval percentages are the company's own reported computations under its own stated standard, not recomputed by Velarion. Where a company does not state a standard, none is assumed.

07

CEO pay ratio

Ratio (CEO : median employee)
CEO total compensation
Median employee compensation
08

Director compensation — fiscal year 2025

DirectorCash feesStock awardsOption awardsNon-equity incentiveAll otherTotal
George B. LangaIndependent · Audit · Compensation · Nominating/Governance (Chair) · Committee of Continuing Directors$28,000$0$0$0$28,000
William C. ZacharyIndependent · Audit (Chair) · Compensation · Nominating/Governance · Committee of Continuing Directors1727,98300028,000
Sally C. Carroll, EsqIndependent · Audit · Compensation · Nominating/Governance · Committee of Continuing Directors27,50000027,500
Russell E. Burke IIIIndependent · Audit · Compensation (Chair) · Nominating/Governance · Committee of Continuing Directors1716,23300016,250
Mark C. WinmillEmployee director · Board Chair · Executive Committee (Chair) · Committee of Continuing Directors00000
09

Board fee structure and ownership guideline

Annual cash retainer$25,000
Annual equity retainer
Per board meeting fee$11,000
Committee chair fees (audit / comp / nom-gov)500 / 500
Stock ownership guideline
09b

Total cost of the board

ComponentFY2025
Cash retainers and fees$55,534
Equity awards (grant-date value)$44,216
All other compensation$0
Total cost of the board$99,750

Computed as the sum of the director compensation table rows above; inputs and formula shown in the register.

10b

Chief executive pay against the peer group

Most recent fiscal-year chief executive compensation at each disclosed peer, taken from that company's own proxy statement.

RankCompanyFYChief executiveSalaryStock awardsOption awardsNon-equity incentiveTotal
1Global Self Storage, Inc.2025Mark Winmill$467,000$128,748$0$0$693,476

Each peer's compensation is from its most recently filed proxy; fiscal years differ by company. Each peer's figures come from its own filings; the subject company is highlighted. Peers whose chief executive compensation is outside our coverage universe are stated as such, never left blank.

FAQ

Frequently asked questions

Who was the highest-paid executive at Global Self Storage, Inc. in fiscal 2025?
The highest-paid executive at Global Self Storage, Inc. in fiscal 2025 was Mark Winmill, Chief Executive Officer and President, with total compensation of $693,476.
How does Global Self Storage, Inc.'s chief executive pay compare to its disclosed peer group?
The filing shows that the CEO pay percentile of disclosed peers was not disclosed.
What is Global Self Storage, Inc.'s CEO-to-median employee pay ratio?
The CEO-to-median employee pay ratio was not disclosed in this extract.
How did shareholders vote on Global Self Storage, Inc.'s executive compensation?
Shareholders supported the executive compensation plan with 74% approval in the latest vote.
How much does Global Self Storage, Inc. spend in total on board compensation for fiscal 2025?
The company reported total board compensation for fiscal 2025 was $99,750.

Answers are drawn only from the figures disclosed in this brief and cited to their location in the source filing. Where a figure required for an answer is not disclosed, that is stated rather than estimated.

11

Source register

Each figure's location is given both for the eye (section · page · table · row · column) and for a script (table/row/column index and exact character span in the filed document). Any figure can be independently confirmed against the source.

#SupportsDocumentFiledAccessionLocation in document
1Section 01, Mark WinmillDEF 14A2026-04-290001193125-26-191430Section “Summary Compensation Table”. As printed: 693,476. Filing ↗machine: span 556666–556673
2Section 01, Donald KlimoskiDEF 14A2026-04-290001193125-26-191430Section “Summary Compensation Table”. As printed: 296,035. Filing ↗machine: span 578886–578893
3Section 01, Thomas O'MalleyDEF 14A2026-04-290001193125-26-191430Section “Summary Compensation Table” · page 35. As printed: 289,274. Filing ↗machine: span 567361–567368
4Section 03, Thomas O'Malley PSUDEF 14A2026-04-290001193125-26-191430Section “EXECUTIVE COMPENSATION” · grants of plan-based awards table. Filing ↗machine: t7 · r3 · c10 · span 563820–563826
5Section 03, Mark Winmill PSUDEF 14A2026-04-290001193125-26-191430Section “EXECUTIVE COMPENSATION” · grants of plan-based awards table. Filing ↗machine: t7 · r2 · c10 · span 552310–552317
6Section 03, Donald Klimoski PSUDEF 14A2026-04-290001193125-26-191430Section “EXECUTIVE COMPENSATION” · grants of plan-based awards table. Filing ↗machine: t7 · r4 · c10 · span 574563–574569
7Section 07, pay ratio10-K2026-03-250001193125-26-124051Section “CEO Pay Ratio”. As printed: —. Filing ↗
8Section 08, George B. LangaDEF 14A2026-04-290001193125-26-191430Section “Director Compensation”. As printed: 28,000. Filing ↗machine: t2 · r3 · c3 · span 246618–246624
9Section 08, William C. ZacharyDEF 14A2026-04-290001193125-26-191430Section “Director Compensation”. As printed: 28,000. Filing ↗machine: t2 · r4 · c13 · span 255394–255400
10Section 08, Sally C. Carroll, EsqDEF 14A2026-04-290001193125-26-191430Section “Director Compensation”. As printed: 27,500. Filing ↗machine: t2 · r5 · c3 · span 257182–257188
11Section 08, Russell E. Burke IIIDEF 14A2026-04-290001193125-26-191430Section “Director Compensation”. As printed: 16,250. Filing ↗machine: t2 · r2 · c13 · span 244828–244834
12Section 08, Mark C. WinmillDEF 14A2026-04-290001193125-26-191430Section “Director Compensation”. As printed: 0. Filing ↗
13Section 02, Russell E. Burke III 2026-05-12Form 42026-05-140001127962-26-000003Insider equity transaction reported since the proxy statement. Filing ↗
14Section 02, William C. Zachary 2026-05-12Form 42026-05-140001667715-26-000003Insider equity transaction reported since the proxy statement. Filing ↗
15Section 02, Mark Campbell Winmill 2026-05-14Form 42026-05-150001019264-26-000003Insider equity transaction reported since the proxy statement. Filing ↗
16Section 06, 2026 voteForm 8-K2026-06-160001193125-26-272611Item 5.07 · say-on-pay result. As reported: 74% (votes for as printed: 3,710,166). Filing ↗
17Section 06, 2025 voteForm 8-K2025-06-090000950170-25-083849Item 5.07 · say-on-pay result. As reported: 81.68% (votes for as printed: 3,212,459). Filing ↗
18Section 06, 2024 voteForm 8-K2024-06-050000950170-24-069152Item 5.07 · say-on-pay result. As reported: 81.2% (votes for as printed: 3,206,646). Filing ↗
19Section 01 trend, Δ column (computed)ComputedcomputedΔ = current-FY total − prior-FY total per named officer.machine: formula: Δ = FY(n) − FY(n−1)
20Section 03b vehicle mix (computed)ComputedcomputedRSU / PSU / Options grant-date fair values summed per officer from the grants table; % performance-vested = PSU ÷ (RSU+PSU+Options).machine: formula: sums + PSU ratio
21Section 09b board cost (computed)ComputedcomputedCash 55,534 + equity 44,216 + all other 0 = 99,750, summed across the director compensation table rows.machine: formula: Σ = 99,750
22Global Self Storage, Inc. (subject), Section 10b CEO totalDEF 14A2026-04-290001193125-26-191430CEO total compensation as printed in Global Self Storage, Inc.'s own proxy. As printed: 693,476. Filing ↗machine: span 556666–556673