SEC Form 4
BioStem Technologies, Inc. (BSEM) insider trading
No open-market BSEM insider purchases or sales were filed in the 12 months to Oct 26, 2026.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $0
- 0 filings · 0 insiders
- Open-market purchases
- $0
- 0 filings
Who traded BSEM, and when
BSEM daily close from Oct 27, 2025 to Oct 26, 2026, between $1.54 and $8.20, last $1.56. No open-market insider purchases or sales were filed in this period.
No open-market insider purchases or sales were filed in the last 12 months.
Open-market trades
0 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| No open-market purchases or sales in the last 12 months. | ||||||
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
| No open-market purchases or sales in the last 12 months. | |||||||
GET /stocks/filings/vX/form-4?tickers=BSEM&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"BSEM"
],
"issuer_cik": "0001658678",
"owner_cik": "0001634730",
"accession_number": "0001193125-26-419152",
"form_type": "4",
"filing_date": "2026-10-09",
"period_of_report": "2026-10-07",
"issuer_name": "BioStem Technologies, Inc.",
"issuer_trading_symbol": "BSEM",
"owner_name": "Matuszewski Jason",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": true,
"is_other": false,
"officer_title": "Chief Executive Officer",
"security_type": "derivative",
"record_type": "holding",
"security_title": "Restricted Stock Units",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"shares_owned_following_transaction": 33874,
"underlying_security_title": "Common Stock",
"underlying_security_shares": 33874,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F9",
"description": "Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock."
},
{
"id": "F10",
"description": "These restricted stock units vest in equal quarterly installments over three year from the grant date (September 15, 2024)."
}
]
},
{
"tickers": [
"BSEM"
],
"issuer_cik": "0001658678",
"owner_cik": "0001634730",
"accession_number": "0001193125-26-419152",
"form_type": "4",
"filing_date": "2026-10-09",
"period_of_report": "2026-10-07",
"issuer_name": "BioStem Technologies, Inc.",
"issuer_trading_symbol": "BSEM",
"owner_name": "Matuszewski Jason",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": true,
"is_other": false,
"officer_title": "Chief Executive Officer",
"security_type": "derivative",
"record_type": "holding",
"security_title": "Restricted Stock Units",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"shares_owned_following_transaction": 99901,
"underlying_security_title": "Common Stock",
"underlying_security_shares": 99901,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F9",
"description": "Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock."
},
{
"id": "F11",
"description": "These restricted stock units vest according to the following schedule: 33% vested on March 17, 2026, the one year anniversary of the grant date, with the remaining units vesting in equal quarterly installments over the subsequent two year period."
},
{
"id": "F1",
"description": "The amount corrects the number of shares of common stock held by the Reporting Person, which over-reported a prior vesting of restricted stock units by one share in the Form 3 filed on August 14, 2026 and the Form 4 filed on September 17, 2026 due to an administrative error."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 17 records
- Option exercises17 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has BioStem Technologies, Inc.'s CEO sold stock?
No. Jason Matuszewski (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is BSEM’s insider data?
These are BSEM Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
Build with AI
Track BSEM insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for BSEM every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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