PBSV · Pharma-Bio Serv, Inc.

4 customers — 56.6% of revenue (the six months ended April 30, 2026)

“During the six months ended April 30, 2026, aggregate revenues from these global group of affiliated companies were 18.5%, 16.1%, 14.6% and 7.4%, or a total of 56.6%”

4 customers — 56.4% of revenue (the three months ended April 30, 2026)

“During the three months ended April 30, 2026, aggregate revenues from these global groups of affiliated companies were 19.8%, 16.5%, 14.2% and 5.9%, or a total of 56.4%”

4 customers — 54.9% of revenue (the six months ended April 30, 2026)

“During the six months ended April 30, 2026, revenues from these customers were 18.5%, 16.1%, 12.9% and 7.4%, or a total of 54.9%”

4 customers — 54.6% of revenue (the three months ended April 30, 2026)

“During the three months ended April 30, 2026, revenues from these customers were 19.8%, 16.5%, 12.4% and 5.9%, or a total of 54.6%”

4 customers — 47.1% of receivables (April 30, 2026)

“On April 30, 2026, amounts due from these customers represented 47.1% of the Company’s total accounts receivable balance.”