PHIO

Phio Pharmaceuticals Corp.

Healthcare Pharmaceutical Preparations Market cap: $10.1M All insider activity → Quote and statistics → Sign in to watch PHIO Sign in to set a price alert

AI summary Cluster of open-market purchases by CEO and directors

Insider Score Band below 60

Research score: 50
AI adjustment: +5

Research score, not a recommendation.

Total bought$59.1K7 Form 4 purchases

Distinct insiders3open-market buyers

Lead insiderBitterman Robert JCEO

Cluster window2026-08-18 → 2026-09-29active

Market data

Live quote and chart from Yahoo Finance, loaded through this server. Insider purchases are marked on the chart.

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Why this score

Research score: a weighted blend of the five factors, times the routine and offering discounts, minus the selling penalty.

Breadth number & diversity of participating insiders

37%

Seniority executive rank of buyers (CEO/CFO/Director)

87%

Commitment purchase size relative to company & holdings

86%

Context buying into stock weakness signals conviction

100%

Timing coordinated purchases within a tight window

93%

Routine-purchase discount × 1.00

Company-type / offering discount × 1.00

Net insider selling penalty − 0

Why are they buying?

AI · discretionary · catalyst none · documented

The CEO and directors made open-market purchases of common stock over a one-month period without any explicit stated reason or preceding catalyst documentable in the filings.

The purchases were executed by multiple insiders including CEO Robert J. Bitterman and directors Ronald Todd Plott and Patricia A. Bradford.

Filing references and sources

Stock Price & Insider Purchase History

Daily close price with open-market insider purchases plotted over time

Loading price history…

Transactions

7 Form 4 trades · 3 insiders Sign in to download CSV

Purchases in this cluster, grouped by insider, largest first
Date	Insider	Role	Shares	Price	Value	Filing
2026-08-19 → 2026-09-29	Plott Ronald Todd history of Plott Ronald Todd's purchases	Director	25,000	$1.10 avg	$27.4K
2026-08-19	Plott Ronald Todd		15,000	$1.14	$17.1K	SEC filing for Plott Ronald Todd (opens in a new tab)
2026-09-28	Plott Ronald Todd		5,000	$1.03	$5.2K	SEC filing for Plott Ronald Todd (opens in a new tab)
2026-09-29	Plott Ronald Todd		5,000	$1.04	$5.2K	SEC filing for Plott Ronald Todd (opens in a new tab)
2026-09-15 → 2026-09-24	BRADFORD PATRICIA A history of BRADFORD PATRICIA A's purchases	Director	18,500	$1.02 avg	$18.9K
2026-09-15	BRADFORD PATRICIA A		12,000	$1.03	$12.4K	SEC filing for BRADFORD PATRICIA A (opens in a new tab)
2026-09-24	BRADFORD PATRICIA A		6,500	$1.01	$6.6K	SEC filing for BRADFORD PATRICIA A (opens in a new tab)
2026-08-18 → 2026-09-22	Bitterman Robert J 11 purchases with a 63-day result · median -9.8%	CEO	12,000	$1.05 avg	$12.7K
2026-08-18	Bitterman Robert J		10,000	$1.06	$10.6K	SEC filing for Bitterman Robert J (opens in a new tab)
2026-09-22	Bitterman Robert J		2,000	$1.03	$2.1K	SEC filing for Bitterman Robert J (opens in a new tab)
Total					$59.1K

What happened next

A run ends after a pause in the buying, so one company can have several. Returns are the stock's return minus its benchmark's (IWM for small companies, SPY otherwise), from the first open after the run became a cluster. Past results, not a forecast.

After this run became a cluster: 21 days -9.3%63 days –126 days –