GOOD · Gladstone Commercial Corp

$12.93 -0.31 (-2.34%) At close · Aug 14

Customer concentration — top 5 customers 17.2% of revenue

5 customers — 17.2% of revenue (As of December 31, 2025)

“As of December 31, 2025, we owned 151 properties and had 143 leases on these properties, and our five largest tenants accounted for approximately 17.2% of our total lease revenue.”

Key customers — 15.2% of revenue (As of December 31, 2025)

“As of December 31, 2025, 15.2% was earned from tenants in the Automotive industry”

Key customers — 12.6% of revenue (As of December 31, 2025)

“12.6% of our total lease revenue was earned from tenants in the Diversified/Conglomerate Services industry”

Key customers — 9.6% of revenue (As of December 31, 2025)

“9.6% was earned from tenants in the Buildings and Real Estate industry”

Key customers — 8.7% of revenue (As of December 31, 2025)

“8.7% was earned from tenants in the Telecommunications industry”

View the 10-K filed Feb 18, 2026

Market Cap

$625.91M

48.41M

Options Chain

Underlying $12.93 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 20 contracts · mixed snapshot sessions · Jun 25, 2026–Aug 14, 2026; 6 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 5d Sep 18 33d Dec 18 124d Mar 19 215d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
2	1	757.8%	0.987	$10.55		$0.06	—	—	1	3
Call · $2.5 In the money Snapshot session Aug 14, 2026 Last $10.55 Breakeven $13.05 Implied vol 757.8% Delta 0.987 ≈99% ITM Gamma 0.003 Theta -0.034 Vega 0.001 Open interest 2 Model this call Put · $2.5 Snapshot session Jun 25, 2026 Last $0.06 Breakeven $2.44 Implied vol — Delta — Gamma — Theta — Vega — Open interest 3 Model this put
4	1	448.9%	0.976	$8.10		$0.09	—	—	2	8
Call · $5 In the money Snapshot session Aug 14, 2026 Last $8.10 Breakeven $13.10 Implied vol 448.9% Delta 0.976 ≈98% ITM Gamma 0.008 Theta -0.033 Vega 0.001 Open interest 4 Model this call Put · $5 Snapshot session Jul 31, 2026 Last $0.09 Breakeven $4.91 Implied vol — Delta — Gamma — Theta — Vega — Open interest 8 Model this put
4	1	498.4%	0.882	$5.65		$0.05	—	—	3	9
Call · $7.5 In the money Snapshot session Aug 13, 2026 Last $5.65 Breakeven $13.15 Implied vol 498.4% Delta 0.882 ≈88% ITM Gamma 0.025 Theta -0.138 Vega 0.003 Open interest 4 Model this call Put · $7.5 Snapshot session Aug 10, 2026 Last $0.05 Breakeven $7.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 9 Model this put
0	1	—	—	$3.00		$0.03	-0.066	146.7%	1	2
Call · $10 In the money Snapshot session Jul 23, 2026 Last $3.00 Breakeven $13.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $10 Snapshot session Jun 29, 2026 Last $0.03 Breakeven $9.97 Implied vol 146.7% Delta -0.066 ≈7% ITM Gamma 0.055 Theta -0.027 Vega 0.003 Open interest 2 Model this put
123	39	41.8%	0.748	$0.60		$0.06	-0.27	45%	3	402
Call · $12.5 In the money Snapshot session Aug 13, 2026 Last $0.60 Breakeven $13.10 Implied vol 41.8% Delta 0.748 ≈75% ITM Gamma 0.489 Theta -0.018 Vega 0.005 Open interest 123 Model this call Put · $12.5 Snapshot session Aug 14, 2026 Last $0.06 Breakeven $12.44 Implied vol 45% Delta -0.27 ≈27% ITM Gamma 0.459 Theta -0.022 Vega 0.006 Open interest 402 Model this put
Underlying $12.93
13	5	—	—	$0.01		$2.10	—	—	2	1
Call · $15 Snapshot session Aug 13, 2026 Last $0.01 Breakeven $15.01 Implied vol — Delta — Gamma — Theta — Vega — Open interest 13 Model this call Put · $15 In the money Snapshot session Aug 7, 2026 Last $2.10 Breakeven $12.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
2	1	—	—	$0.01		—	—	—	—	0
Call · $17.5 Snapshot session Jul 30, 2026 Last $0.01 Breakeven $17.51 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $17.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $20 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $20 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
4	4	—	—	$0.05		—	—	—	—	0
Call · $22.5 Snapshot session Aug 10, 2026 Last $0.05 Breakeven $22.55 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this call Put · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $25 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $25 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 25, 2026–Aug 14, 2026; 6 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown.

Key facts CIK 1234006 CUSIP 376536108 13F (30d) 188 filings 187 filers Visit website Investor relations