Ask about Siren · freeSiren(SI)
Total Value Locked$451,911
TVL by Chain
Ethereum$419,707
Polygon$28,127
Arbitrum$4,077
Key Metrics
Market Cap$148,482
$SI Price$0.0022
Fully Diluted Valuation$222,085
$SI Volume 24h$19.53
CEX Volume$0
DEX Volume$19.53(100% of total)
Total Raised$5.2m
Dec 1, 2020$1.2mRound: Seed
Mar 1, 2021$4mRound: SeedInvestors: 1kx, CMS Holdings, Edward Moncada, Jack Herrick, Mechanism Capital, Naval Ravikant, Robert Leshner, Rockaway Blockchain Fund, Santiago Roel Santos, Tarun Chitra, The Spartan Group
Protocol Information
Decentralized option markets on Ethereum.
Audits:
Methodology
TVL: Total value of all coins held in the smart contracts of the protocolView code on GitHubHacks
Date: Sep 3, 2021
Amount: $3.5m
Classification: Reentrancy
Technique: Reentrancy
On September 3, 2021, the SIREN protocol on Polygon was exploited via reentrancy in withdrawCapital, allowing repeated withdrawals before balance updates. The attacker drained ~$3.5M across multiple AMM pools (KNC, SUSHI, USDC, WETH, WMATIC), affecting 26 LP addresses.
Chains: Polygon
Language: Solidity
Target Type: DeFi Protocol
Competitors
Siren history
TVL is the default DefiLlama definition. Daily values are UTC snapshots from Nov 18, 2020 to Nov 9, 2026.
All-time high TVL: $23.22m on Mar 15, 2021. All-time low TVL: $998 on Nov 18, 2020.
Daily TVL, Oct 11, 2026 to Nov 9, 2026
| Date | TVL |
|---|---|
| Oct 11, 2026 | $481,925 |
| Oct 12, 2026 | $488,725 |
| Oct 13, 2026 | $444,734 |
| Oct 14, 2026 | $484,692 |
| Oct 15, 2026 | $461,140 |
| Oct 16, 2026 | $473,757 |
| Oct 17, 2026 | $467,972 |
| Oct 18, 2026 | $461,886 |
| Oct 19, 2026 | $462,715 |
| Oct 20, 2026 | $464,932 |
| Oct 21, 2026 | $473,527 |
| Oct 22, 2026 | $479,727 |
| Oct 23, 2026 | $451,444 |
| Oct 24, 2026 | $445,327 |
| Oct 25, 2026 | $444,778 |
| Oct 26, 2026 | $446,543 |
| Oct 27, 2026 | $458,231 |
| Oct 28, 2026 | $454,502 |
| Oct 29, 2026 | $465,000 |
| Oct 30, 2026 | $417,776 |
| Oct 31, 2026 | $456,784 |
| Nov 1, 2026 | $453,806 |
| Nov 2, 2026 | $460,402 |
| Nov 3, 2026 | $454,498 |
| Nov 4, 2026 | $456,666 |
| Nov 5, 2026 | $481,593 |
| Nov 6, 2026 | $441,959 |
| Nov 7, 2026 | $445,394 |
| Nov 8, 2026 | $456,964 |
| Nov 9, 2026 | $441,933 |
TVL at each month end, Dec 2024 to Nov 2026
| Date | TVL |
|---|---|
| Dec 31, 2024 | $1.01m |
| Jan 31, 2025 | $943,388 |
| Feb 28, 2025 | $759,683 |
| Mar 31, 2025 | $656,011 |
| Apr 30, 2025 | $632,955 |
| May 31, 2025 | $418,434 |
| Jun 30, 2025 | $477,943 |
| Jul 31, 2025 | $616,838 |
| Aug 31, 2025 | $611,759 |
| Sep 30, 2025 | $514,447 |
| Oct 31, 2025 | $418,525 |
| Nov 30, 2025 | $417,769 |
| Dec 31, 2025 | $408,107 |
| Jan 31, 2026 | $327,395 |
| Feb 28, 2026 | $292,231 |
| Mar 31, 2026 | $280,033 |
| Apr 30, 2026 | $269,849 |
| May 31, 2026 | $260,440 |
| Jun 30, 2026 | $245,435 |
| Jul 31, 2026 | $324,482 |
| Aug 31, 2026 | $364,442 |
| Sep 30, 2026 | $542,595 |
| Oct 31, 2026 | $456,784 |
| Nov 9, 2026 (latest) | $441,933 |
TVL at each year end, Dec 31, 2020 to Dec 31, 2025
| Date | TVL |
|---|---|
| Dec 31, 2020 | $1.19m |
| Dec 31, 2021 | $2.71m |
| Dec 31, 2022 | $478,395 |
| Dec 31, 2023 | $993,803 |
| Dec 31, 2024 | $1.01m |
| Dec 31, 2025 | $408,107 |
The .csv export on the chart above downloads every daily value. The same data is in the public API: https://api.llama.fi/protocol/siren
Frequently asked questions
What is Siren's TVL?
As of Nov 9, 2026, Siren has $451,911 in total value locked. TVL has decreased 3.7% over the past 30 days.
What chains does Siren operate on?
Siren operates on 3 chains: Ethereum, Polygon, and Arbitrum. Ethereum holds the largest share at 92.9%.
What is the SI token price and valuation?
SI is currently trading at $0.0022. Its circulating market capitalization is $148,482, ranking it #6,259. Its fully diluted valuation is $222,085. Supply currently stands at 66.86m circulating, 100m total supply, 100m maximum supply.
How has SI performed recently?
SI is down 9.8% over the past 7 days and down 35.6% over the past 30 days. Its all-time high is $4.37, reached on Mar 6, 2021. The token is currently 99.9% below that level.
How does Siren's TVL compare to similar protocols?
Among Options protocols tracked by DefiLlama, Siren ranks #12 by TVL. The category holds $196.35m across 76 protocols, and Siren accounts for 0.2% of that total. Similar protocols include SOFA.org, Pods Finance, Thetanuts Finance, Opium, Hegic, Opyn Gamma, Deri Protocol, Cega V1, Premia V2, and TYMIO.
Has Siren ever been exploited?
Siren has 1 recorded security incident. The most recent incident occurred on Sep 3, 2021 and involved $3.5m. It was classified as Reentrancy.