SCHEDULE 13D/A Filed 2026-09-15 Event 2026-09-15 SEC 0001213900-26-100121 →

T3 Defense Inc. → Tessera Defense & Homeland Security Inc. HLSQ

Stake: — Shares: 156,796 Class: Common Stock, par value $0.0001 per share

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 29/100 · Filer 90d Win Rate: 0% · Hist. 90d Edge: -90.3%

Active Schedule 13D filer baseline
Material 8-K governance/transaction event (Item 5.02 / 1.01 / 2.01) within ±30d
Short interest building (+134.2% vs prior settlement)

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

10 13D/G filings on this issuer

9 other filings besides this one

Filer Track Record

2 filings by this filer

1 other filing in the data moat

Short Interest · settle 2026-10-15

DTC 1.00

305,287 shares short · +134.2% vs prior

Other 13D/G Filings on Tessera Defense & Homeland Security Inc.

Filed	Form	Filer	Stake	Shares
2026-10-06	SCHEDULE 13D/A	Mayers Ventures LLC	—	195,000	view →
2026-09-17	SCHEDULE 13D	Mayers Ventures LLC	4.86%	130,000	view →
2026-06-16	SCHEDULE 13D/A	Flynn James E	4.70%	266,424	view →
2026-05-28	SCHEDULE 13D/A	Flynn James E	8.09%	444,703	view →
2026-04-10	SCHEDULE 13D	T3 Defense Inc.	19.87%	1,300,000	view →
2025-03-03	SCHEDULE	Flynn James E	9.99%	15,558,445	view →
2024-07-11	SC	Flynn James E	—	—	view →
2024-05-30	SC	Flynn James E	—	—	view →
2023-03-17	SC	OrbiMed Israel BioFund GP Limited Partnership	—	—	view →

Other Filings by T3 Defense Inc.

Filed	Form	Issuer	Stake	Shares
2026-04-10	SCHEDULE 13D	BiomX Inc. PHGE	19.87%	1,300,000	view →

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