SCHEDULE 13D/A Filed 2026-08-21 Event 2026-08-17 SEC 0001437749-26-028685 →

Sky Frontier Foundation → Stablecoin Development Corp SDEV

Stake: 9.90% Shares: 5,617,689 CUSIP: 66987P508 Class: Common Stock, $0.01 par value per share

Item 4 — Purpose of Transaction

As described in this Amendment, as of August 17, 2026, the second tranche of the Warrant, representing 6,000,000 shares of Common Stock, became exercisable within 60 days. Together with the 4,000,000 shares underlying the first tranche of the Warrant, an aggregate of 10,000,000 shares of Common Stock underlying the Warrant are exercisable within 60 days. The Reporting Person has not exercised any portion of the Warrant and does not currently hold any shares of Common Stock. The foregoing has not changed the Reporting Person's investment intent as described in the Schedule 13D.

Cross-References

Insider Activity (last 365d)

6 transactions

3 buys · 0 sales · 0 awards/exercises

Issuer Cluster

16 13D/G filings on this issuer

15 other filings besides this one

Filer Track Record

3 filings by this filer

2 other filings in the data moat

Short Interest · settle 2026-07-31

DTC 4.13

378,425 shares short · -30.8% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2025-10-21	Kazley Michael John	director, officer, 10%+ owner	C	11,361,216	—	—
2025-10-21	Framework Ventures IV L.P.	10%+ owner	C	11,361,216	—	—
2025-10-21	R01 Fund LP	director, officer, 10%+ owner	C	11,361,216	—	—
2025-10-16	R01 Fund LP	director, officer, 10%+ owner	Buy	11,332,020	$0.01	$113K
2025-10-16	Framework Ventures IV L.P.	10%+ owner	Buy	11,332,020	$0.01	$113K
2025-10-16	Kazley Michael John	director, officer, 10%+ owner	Buy	11,332,020	$0.01	$113K

Other 13D/G Filings on Stablecoin Development Corp

Filed	Form	Filer	Stake	Shares
2026-07-24	SCHEDULE 13D/A	R01 Fund LP	52.40%	49,508,502	view →
2026-07-24	SCHEDULE 13D/A	Framework Ventures IV L.P.	46.60%	47,723,141	view →
2026-07-22	SCHEDULE 13D/A	Sky Frontier Foundation	—	4,000,000	view →
2026-06-17	SCHEDULE 13D/A	Framework Ventures IV L.P.	45.90%	32,690,366	view →
2026-06-17	SCHEDULE 13D/A	R01 Fund LP	49.80%	33,404,510	view →
2026-05-27	SCHEDULE 13D	Sky Frontier Foundation	9.90%	3,009,502	view →
2026-05-22	SCHEDULE 13G	Tether Global Investments Fund, S.I.C.A.F., S.A.	—	—	view →
2026-05-19	SCHEDULE 13D/A	R01 Fund LP	—	33,429,230	view →
2026-05-19	SCHEDULE 13D/A	Framework Ventures IV L.P.	—	32,715,086	view →
2026-01-29	SCHEDULE	Lazar David E.	4.99%	6,388,000	view →
2026-01-21	SCHEDULE	Framework Ventures IV L.P.	45.00%	56,806,080	view →
2026-01-21	SCHEDULE	R01 Fund LP	45.00%	56,806,080	view →
2020-08-24	SC	Fu Jian Ping	—	—	view →
2019-04-16	SC	Fu Jian Ping	—	—	view →
2019-04-16	SC	OP Financial Ltd	—	—	view →

Other Filings by Sky Frontier Foundation

Filed	Form	Issuer	Stake	Shares
2026-07-22	SCHEDULE 13D/A	Stablecoin Development Corp	—	4,000,000	view →
2026-05-27	SCHEDULE 13D	Stablecoin Development Corp SDEV	9.90%	3,009,502	view →

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