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CTSO · Cytosorbents Corp

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys7
Open-market sells0
Total purchased$120,435
Unique insiders buying3
Most senior buyerCEO
Avg price paid$0.58
Research cases0
Last filing2026-09-15

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-09-04 — Chan Phillip P. · bought 200,000 @ $0.35 2026-09-14 — Capponi Vincent · bought 1,800 @ $6.07 2026-09-14 — Capponi Vincent · bought 273 @ $5.90 2026-09-15 — Sobel Alan D. · bought 100 @ $6.01 2026-09-15 — Sobel Alan D. · bought 1,900 @ $6.12 2026-09-15 — Sobel Alan D. · bought 500 @ $6.05 2026-09-15 — Chan Phillip P. · bought 3,774 @ $6.00
2026-09-042026-09-15

Insider cost basis

Share-weighted average price across 7 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$0.35 $6.12
$0.58 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

Sobel Alan D. Director
Chan Phillip P. Chief Executive Officer, Director
Capponi Vincent President and COO
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $CTSO is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 7 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-09-15', 'insider_name': 'Sobel Alan D.', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 100.0, 'price': 6.01, 'value': 601.0, 'is_buy': True}, {'transaction_date': '2026-09-15', 'insider_name': 'Sobel Alan D.', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 1900.0, 'price': 6.12, 'value': 11628.0, 'is_buy': True}, {'transaction_date': '2026-09-15', 'insider_name': 'Sobel Alan D.', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 500.0, 'price': 6.05, 'value': 3025.0, 'is_buy': True}, {'transaction_date': '2026-09-15', 'insider_name': 'Chan Phillip P.', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 3774.0, 'price': 6.0, 'value': 22644.0, 'is_buy': True}, {'transaction_date': '2026-09-14', 'insider_name': 'Capponi Vincent', 'insider_title': 'President and COO', 'transaction_type': 'Open-market buy', 'shares': 1800.0, 'price': 6.07, 'value': 10926.0, 'is_buy': True}, {'transaction_date': '2026-09-14', 'insider_name': 'Capponi Vincent', 'insider_title': 'President and COO', 'transaction_type': 'Open-market buy', 'shares': 273.0, 'price': 5.9, 'value': 1610.7, 'is_buy': True}, {'transaction_date': '2026-09-04', 'insider_name': 'Chan Phillip P.', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 200000.0, 'price': 0.35, 'value': 70000.0, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for CTSO today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.