NasdaqHealth CarePharmaceutical PreparationsKING OF PRUSSIA, PA

Phio Pharmaceuticals Corp. PHIO

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Estimated market cap $9.21M11.95M shares, shares as of Nov 3, 2026CIK 1533040

Insider trades, 12 mo

16 buys · 0 sells

$137.0K bought, open market

Congress trades, 24 mo

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No disclosed trades

13F holders, Q3 2026

4.1% of shares · 2 added

13F holders

…

Lobbying, 12 mo

—

No lobbying filings

Federal contracts, 12 mo

—

None matched

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Latest 10-Q

Q3 2026

What changed in Phio Pharmaceuticals Corp.'s latest quarterly report, compared with the one before.

Filed Nov 5, 2026 · Quarter ended Sep 30, 2026

Compared with the 10-Q for the quarter ended Jun 30, 2026. Sections compared: management's discussion, risk factors, legal proceedings and controls and procedures.

Read the 10-Q on sec.gov ↗Filing index ↗

Latest 10-Q

What changed in Phio Pharmaceuticals Corp.'s latest quarterly report, compared with the one before.

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Insider trades

16 in 12 mo

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

Recent insider trades

David H. Deming Director	Nov 11 Form 4 ↗	Buy	+$4,358 5,200 sh @ $0.838	-4.5%
David H. Deming Director	Nov 10 Form 4 ↗	Buy	+$5,709 6,800 sh @ $0.8395	-5.9%
Ronald Todd Plott Director	Nov 9 Form 4 ↗	Buy	+$15.2K 18,300 sh @ $0.83	-8.4%
Robert J. Bitterman Chairman, Pres. & CEO, Director	Nov 9 Form 4 ↗	Buy	+$20.5K 25,000 sh @ $0.82	-8.4%
Ronald Todd Plott Director	Sep 29 Form 4 ↗	Buy	+$5,200 5,000 sh @ $1.04	-23.9%

All PHIO insider trades →Planned sales (Form 144): see notices

Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

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13F holders

489,448 shares

17 funds report PHIO. Values checked against market prices.

Funds own 5.6% of shares (Q2 2026)

24 funds hold the stock.

Q3 2026: 4.1% · 5,560 of ~8,900 funds reported so far

Q2 20252.9%
Q3 20251.8%
Q4 20253.4%
Q1 20265.8%
Q2 20265.6%
Q3 2026 (so far)4.1%

Q3 2026. 3 new, 2 added to, 5 trimmed, 10 exited since Q2 2026.

Top 13F holders
#
1	Geode Capital Management, LLC 13F ↗	105,686	$108.9K	-7.8%
2	Vanguard Capital Management LLC 13F ↗	94,262	$97.1K	unchanged
3	Vanguard Fiduciary Trust Co 13F ↗	76,113	$78.4K	+99.4%
4	Jane Street Group, LLC 13F ↗	61,446	$63.3K	-47.8%
5	Renaissance Technologies LLC 13F ↗	57,377	$59.1K	New
6	Cetera Investment Advisers 13F ↗	47,500	$48.9K	unchanged
7	HRT Financial LP 13F ↗	21,485	$22.0K	n/a
8	StoneX Group Inc. 13F ↗	11,144	$11.5K	New
9	Morgan Stanley 13F ↗	6,000	$6,180	unchanged
10	UBS Group AG 13F ↗	3,070	$3,162	-43.0%

One of these funds reports its values in thousands of dollars; its figures are shown in dollars.

Download CSV Every fund that holds PHIO, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.

13F holders

Funds that report this stock, checked against market prices.

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Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

No recent congressional trades for this company.

Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

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Lobbying

What Phio Pharmaceuticals Corp. and its lobbying firms report each quarter.

No recent lobbying filings for this company.

Lobbying

What Phio Pharmaceuticals Corp. and its lobbying firms report each quarter.

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Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

Funds holding the stock

Shares they report

Funds holding the stock by quarter

Q3 2024	6	—	28,506	$98.3K
Q4 2024	11	+5	154,046	$277.4K
Q1 2025	11	0	100,623	$130.8K
Q2 2025	11	0	168,186	$395.4K
Q3 2025	11	0	188,486	$467.4K
Q4 2025	17	+6	363,848	$382.3K
Q1 2026	24	+7	668,490	$815.0K
Q2 2026	24	0	647,127	$662.6K
Q3 2026	17	-7	489,448	$504.0K

Each point is a quarter-end, from Q3 2024 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.

Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.

The history follows the company's current CUSIP number (71880W501). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q3 2024) can be later than the stock's first appearance in 13F reports.

Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.

A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

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More filings and data

Each opens the table.

Ownership stakes4 in 12 mo 8-K events4 in 90 days Patents2 patents granted Short interestFINRA · updated Oct 15 Planned insider salesNone in 12 mo Executive pay3 fiscal years Wikipedia attentionNone on record SEC enforcementNone on record Clinical trials0 active IPO history15 registrations Ownership stakes…8-K events…Patents…Short interest…Planned insider sales…Executive pay…Wikipedia attention…SEC enforcement…

About the company

The basics from the company’s SEC registration.

Legal name: Phio Pharmaceuticals Corp.
Address: 411 SWEDELAND ROAD, SUITE 23-1080, KING OF PRUSSIA, PA 19406
Phone: (508) 767-3861
Fiscal year ends: Dec 31
Filer category: Non-accelerated filer, smaller reporting company
Incorporated in: DE
Listed as: PHIO (Nasdaq)
Former names: RXi Pharmaceuticals Corp (until 2018)
SEC filings: All filings on SEC EDGAR ↗

About the company

The basics from the company’s SEC registration.

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$0.771−$0.04 (−5.03%) Nov 13 close

1M3M1Y

Oct 13, 2026Low $0.771 · High $0.9496Nov 13, 2026

Aug 13, 2026Low $0.771 · High $1.21Nov 13, 2026

Nov 13, 2025Low $0.771 · High $1.65Nov 13, 2026

Congress purchase Congress sale Insider sale over $1M

Adjusted for stock splits; not for dividends. Where prices come from.

Live chart

Intraday and historical prices from TradingView. Quotes may be delayed.

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Information, not investment advice. Company matching is automatic; check the source before relying on one row.