United States Biotechnology & Medical Research

Phio Pharmaceuticals Corp (PHIO)

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The most recent insider trading activity occurred on December 31, 2025, with a BUY transaction by Robert J. Bitterman, Chairman, Pres. & CEO. This transaction involved 5,000 shares valued at $5,150. Overall, insider activity shows consistent buying patterns from key executives in recent months.
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Ticker: PHIO Exchange: NAS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Bitterman Robert J
Chairman, Pres. & CEO
1 purchase — total 5,150 USD
Buy 31 Dec 2025
Value US$3,295,747.98 | Price 307.57 | Shares 70,219
Buy 23 Dec 2025
Value US$1,651,317.86 | Price 71.17 | Shares 53,440
Buy 21 Nov 2025
Value US$5,700.00 | Price 1.14 | Shares 5,000
Buy 18 Nov 2025
Value US$6,350.00 | Price 1.27 | Shares 5,000
Buy 10 Jun 2025
Value US$6,049.75 | Price 2.42 | Shares 2,500
Buy 10 Jun 2025
Value US$4,840.00 | Price 2.42 | Shares 2,000
Buy 9 Jun 2025
Value US$4,125.00 | Price 2.75 | Shares 1,500
Buy 22 May 2025
Value US$2,135.88 | Price 1.78 | Shares 1,200
Buy 21 May 2025
Value US$5,310.00 | Price 1.77 | Shares 3,000
Buy 20 May 2025
Value US$4,550.00 | Price 1.82 | Shares 2,500
Buy 7 Jun 2024
Value US$740.00 | Price 0.74 | Shares 1,000
Buy 6 Jun 2024
Value US$750.00 | Price 0.75 | Shares 1,000
Buy 26 Feb 2024
Value US$2,275.00 | Price 0.91 | Shares 2,500
Buy 1 Jul 2023
Value US$2,840.00 | Price 2.84 | Shares 1,000
Buy 30 Jun 2023
Value US$2,880.00 | Price 2.88 | Shares 1,000
Buy 14 Jun 2023
Value US$6,200.00 | Price 3.10 | Shares 2,000
Buy 14 Dec 2022
Value US$780.00 | Price 0.39 | Shares 2,000
Buy 7 Dec 2022
Value US$780.00 | Price 0.39 | Shares 2,000
Buy 5 Dec 2022
Value US$860.00 | Price 0.43 | Shares 2,000
Buy 2 Dec 2022
Value US$2,041.00 | Price 0.41 | Shares 5,000
Buy 29 Nov 2022
Value US$86.00 | Price 0.40 | Shares 215
Buy 25 Nov 2022
Value US$1,050.00 | Price 0.42 | Shares 2,500
Buy 23 Nov 2022
Value US$819.80 | Price 0.41 | Shares 2,000
Buy 16 Nov 2022
Value US$1,750.00 | Price 1,750.00 | Shares 1
Buy 16 Aug 2021
Value US$9,780.00 | Price 1.63 | Shares 6,000
Buy 4 Mar 2021
Value US$4,999.68 | Price 2.56 | Shares 1,953
Buy 3 Mar 2021
Value US$2,148.30 | Price 3.15 | Shares 682
Buy 3 Mar 2021
Value US$7,575.00 | Price 3.03 | Shares 2,500
Buy 19 Aug 2020
Value US$5,000.00 | Price 2.50 | Shares 2,000
Buy 2 Oct 2017
Value US$3,195.00 | Price 0.45 | Shares 7,100
Buy 2 Oct 2017
Value US$92.00 | Price 0.46 | Shares 200
Buy 2 Oct 2017
Value US$1,188.00 | Price 0.44 | Shares 2,700
Planned sale 7 Sep 2017
Value US$31,017.55 | Price 0.53 | Shares 58,712
Planned sale 6 Sep 2017
Value US$49,308.11 | Price 0.54 | Shares 91,907
Planned sale 5 Sep 2017
Value US$14,585.44 | Price 0.56 | Shares 26,181
Planned sale 1 Sep 2017
Value US$13,182.24 | Price 0.57 | Shares 23,200
Buy 24 Aug 2017
Value US$413.84 | Price 0.56 | Shares 739
Buy 24 Aug 2017
Value US$2,398.55 | Price 0.55 | Shares 4,361
Buy 24 Aug 2017
Value US$2,670.50 | Price 0.55 | Shares 4,900
Buy 23 Jun 2017
Value US$2,170.00 | Price 0.62 | Shares 3,500
Buy 22 Jun 2017
Value US$3,100.00 | Price 0.62 | Shares 5,000
Buy 22 Jun 2017
Value US$3,150.00 | Price 0.63 | Shares 5,000
Buy 26 Apr 2017
Value US$6,480.00 | Price 0.65 | Shares 10,000
Buy 17 Mar 2017
Value US$11.48 | Price 0.77 | Shares 15
Buy 17 Mar 2017
Value US$508.79 | Price 0.77 | Shares 665
Buy 17 Mar 2017
Value US$7,171.74 | Price 0.77 | Shares 9,320
Buy 17 Feb 2017
Value US$2,027.32 | Price 0.70 | Shares 2,917
Buy 17 Feb 2017
Value US$4,765.79 | Price 0.69 | Shares 6,883
Buy 17 Feb 2017
Value US$138.30 | Price 0.69 | Shares 200
Buy 8 Feb 2017
Value US$6,850.00 | Price 0.69 | Shares 10,000
Buy 25 Jan 2017
Value US$6,758.96 | Price 0.70 | Shares 9,700
Buy 25 Jan 2017
Value US$207.00 | Price 0.69 | Shares 300
Buy 19 Jan 2017
Value US$416.94 | Price 0.69 | Shares 600
Buy 19 Jan 2017
Value US$4,448.00 | Price 0.70 | Shares 6,400
Buy 19 Jan 2017
Value US$2,083.80 | Price 0.69 | Shares 3,000
Buy 2 Apr 2015
Value US$3,596.00 | Price 0.72 | Shares 5,000
Buy 17 Feb 2015
Value US$4,680.00 | Price 1.17 | Shares 4,000
Buy 10 Feb 2015
Value US$1,444.88 | Price 1.25 | Shares 1,156
Buy 10 Feb 2015
Value US$798.56 | Price 1.24 | Shares 644
Buy 10 Feb 2015
Value US$244.00 | Price 1.22 | Shares 200
Buy 22 Jan 2015
Value US$2,205.07 | Price 1.19 | Shares 1,853
Buy 22 Jan 2015
Value US$3,776.40 | Price 1.20 | Shares 3,147
Buy 20 Jan 2015
Value US$10,300.00 | Price 1.03 | Shares 10,000
Buy 30 Dec 2014
Value US$794.65 | Price 1.59 | Shares 500
Buy 30 Dec 2014
Value US$3,173.40 | Price 1.59 | Shares 2,000
Buy 13 Oct 2014
Value US$5,039.70 | Price 1.68 | Shares 3,000
Buy 19 Sep 2014
Value US$9,900.00 | Price 2.20 | Shares 4,500
Buy 16 Sep 2014
Value US$10,390.00 | Price 2.08 | Shares 5,000
Buy 15 Sep 2014
Value US$4,380.00 | Price 2.19 | Shares 2,000
Buy 15 Sep 2014
Value US$6,569.70 | Price 2.19 | Shares 3,000
Buy 15 Sep 2014
Value US$10,899.50 | Price 2.18 | Shares 5,000
Buy 31 Jul 2014
Value US$992.00 | Price 2.48 | Shares 400
Buy 15 Jul 2014
Value US$2,500.00 | Price 2.50 | Shares 1,000
Buy 9 Jul 2014
Value US$3,597.86 | Price 2.57 | Shares 1,400
Buy 2 Jul 2014
Value US$858.00 | Price 2.86 | Shares 300
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-01-02 2025-12-31 B Purchase
3.0
Bitterman Robert J

Chairman, Pres. & CEO

Executive Director
70,219 +44.3%
307.57
US$3,295,748 		70,219 +44.3% 307.57 US$3,295,748
2025-12-29 2025-12-23 B Purchase
3.0
Bitterman Robert J

Chairman, Pres. & CEO

Executive Director
53,440 -36.9%
71.17
US$1,651,318 		53,440 -36.9% 71.17 US$1,651,318
2025-11-24 2025-11-21 B Purchase
3.0
Bitterman Robert J

Chairman, Pres. & CEO

Executive Director
4,859 +22.3%
472.50
US$2,528,904 		4,859 +22.3% 472.50 US$2,528,904
2025-11-19 2025-11-18 B Purchase
3.0
Bitterman Robert J

Chairman, Pres. & CEO

Executive Director
5,000 +1.8%
1.27
US$6,350 		5,000 +1.8% 1.27 US$6,350
2025-06-11 2025-06-10 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
2,500 +19.0%
2.42
US$6,050 		2,500 +19.0% 2.42 US$6,050
2025-06-11 2025-06-10 B Purchase
3.0
Bitterman Robert J

Chairman, Pres & CEO

Executive Director
2,000 +8.0%
2.42
US$4,840 		2,000 +8.0% 2.42 US$4,840
2025-06-10 2025-06-09 B Purchase
3.0
Bitterman Robert J

Chairman, Pres & CEO

Executive Director
1,500 +6.3%
2.75
US$4,125 		1,500 +6.3% 2.75 US$4,125
2025-05-23 2025-05-22 B Purchase
3.0
Bitterman Robert J

Chairman, Pres & CEO

Executive Director
1,200 +5.3%
1.78
US$2,136 		1,200 +5.3% 1.78 US$2,136
2025-05-23 2025-05-21 B Purchase
3.0
Bitterman Robert J

Chairman, Pres & CEO

Executive Director
3,000 +15.4%
1.77
US$5,310 		3,000 +15.4% 1.77 US$5,310
2025-05-21 2025-05-20 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
2,500 +23.4%
1.82
US$4,550 		2,500 +23.4% 1.82 US$4,550
2024-06-11 2024-06-07 B Purchase
3.0
Bitterman Robert J

President & CEO

Executive Director
1,000 +5.0%
0.74
US$740 		1,000 +5.0% 0.74 US$740
2024-06-10 2024-06-06 B Purchase
3.0
Bitterman Robert J

President & CEO

Executive Director
1,000 +5.3%
0.75
US$750 		1,000 +5.3% 0.75 US$750
2024-02-27 2024-02-26 B Purchase
3.0
Bitterman Robert J

President & CEO

Executive Director
2,500 +15.2%
0.91
US$2,275 		2,500 +15.2% 0.91 US$2,275
2023-07-05 2023-07-01 B Purchase
3.0
Bitterman Robert J

President & CEO

Executive Director
1,000 +5.5%
2.84
US$2,840 		1,000 +5.5% 2.84 US$2,840
2023-07-05 2023-06-30 B Purchase
3.0
Bitterman Robert J

President & CEO

Executive Director
1,000 +5.8%
2.88
US$2,880 		1,000 +5.8% 2.88 US$2,880
2023-06-15 2023-06-14 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
2,000 +50.0%
3.10
US$6,200 		2,000 +50.0% 3.10 US$6,200
2022-12-15 2022-12-14 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
2,000 +2.8%
0.39
US$780 		2,000 +2.8% 0.39 US$780
2022-12-08 2022-12-07 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
2,000 +2.8%
0.39
US$780 		2,000 +2.8% 0.39 US$780
2022-12-06 2022-12-05 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
2,000 +2.9%
0.43
US$860 		2,000 +2.9% 0.43 US$860
2022-12-05 2022-12-02 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
5,000 +20.0%
0.41
US$2,041 		5,000 +20.0% 0.41 US$2,041
2022-11-29 2022-11-29 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
215 +0.3%
0.40
US$86 		215 +0.3% 0.40 US$86
2022-11-29 2022-11-25 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
2,500 +3.8%
0.42
US$1,050 		2,500 +3.8% 0.42 US$1,050
2022-11-28 2022-11-23 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
2,000 +8.7%
0.41
US$820 		2,000 +8.7% 0.41 US$820
2022-11-16 2022-11-16 B Purchase
3.0
Bitterman Robert J

Interim Executive Chairman

Executive Director
1 +inf%
1,750.00
US$1,750 		1 +inf% 1,750.00 US$1,750
2021-08-17 2021-08-16 B Purchase
2.4
Dispersyn Gerrit

President & CEO

Executive Director
6,000 +6.7%
1.63
US$9,780 		6,000 +6.7% 1.63 US$9,780
2021-03-05 2021-03-04 B Purchase
2.4
Dispersyn Gerrit

President & CEO

Executive Director
1,953 +2.2%
2.56
US$5,000 		1,953 +2.2% 2.56 US$5,000
2021-03-03 2021-03-03 B Purchase
2.6
Ferrara Robert L
Non-Executive Director
682 +5.5%
3.15
US$2,148 		682 +5.5% 3.15 US$2,148
2021-03-03 2021-03-03 B Purchase
2.4
Dispersyn Gerrit

President & CEO

Executive Director
2,500 +2.9%
3.03
US$7,575 		2,500 +2.9% 3.03 US$7,575
2020-08-19 2020-08-19 B Purchase
2.4
Dispersyn Gerrit

President & CEO

Officer
2,000 +13.9%
2.50
US$5,000 		2,000 +13.9% 2.50 US$5,000
2017-10-02 2017-10-02 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
7,100 +5.2%
0.45
US$3,195 		7,100 +5.2% 0.45 US$3,195
2017-10-02 2017-10-02 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
200 +0.1%
0.46
US$92 		200 +0.1% 0.46 US$92
2017-10-02 2017-10-02 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
2,700 +2.0%
0.44
US$1,188 		2,700 +2.0% 0.44 US$1,188
2017-09-07 2017-09-07 PlS Planned sale Eliseev Alexey

Chief Business Officer
58,712 -5.8%
0.53
US$31,018 		58,712 -5.8% 0.53 US$31,018
2017-09-07 2017-09-06 PlS Planned sale Eliseev Alexey

Chief Business Officer
91,907 -8.3%
0.54
US$49,308 		91,907 -8.3% 0.54 US$49,308
2017-09-07 2017-09-05 PlS Planned sale Eliseev Alexey

Chief Business Officer
26,181 -2.3%
0.56
US$14,585 		26,181 -2.3% 0.56 US$14,585
2017-09-01 2017-09-01 PlS Planned sale
Eliseev Alexey

Chief Business Officer
23,200 -2.0%
0.57
US$13,182 		23,200 -2.0% 0.57 US$13,182
2017-08-24 2017-08-24 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
739 +0.6%
0.56
US$414 		739 +0.6% 0.56 US$414
2017-08-24 2017-08-24 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
4,361 +3.4%
0.55
US$2,399 		4,361 +3.4% 0.55 US$2,399
2017-08-24 2017-08-24 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
4,900 +4.0%
0.55
US$2,670 		4,900 +4.0% 0.55 US$2,670
2017-06-26 2017-06-23 B Purchase
2.4
Dispersyn Gerrit

Chief Development Officer
3,500 +inf%
0.62
US$2,170 		3,500 +inf% 0.62 US$2,170
2017-06-22 2017-06-22 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
5,000 +4.3%
0.62
US$3,100 		5,000 +4.3% 0.62 US$3,100
2017-06-22 2017-06-22 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
5,000 +4.4%
0.63
US$3,150 		5,000 +4.4% 0.63 US$3,150
2017-04-26 2017-04-26 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
10,000 +9.7%
0.65
US$6,480 		10,000 +9.7% 0.65 US$6,480
2017-03-20 2017-03-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
15 +0.0%
0.77
US$11 		15 +0.0% 0.77 US$11
2017-03-20 2017-03-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
665 +0.7%
0.77
US$509 		665 +0.7% 0.77 US$509
2017-03-20 2017-03-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
9,320 +10.1%
0.77
US$7,172 		9,320 +10.1% 0.77 US$7,172
2017-02-21 2017-02-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
2,917 +3.3%
0.70
US$2,027 		2,917 +3.3% 0.70 US$2,027
2017-02-21 2017-02-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
6,883 +8.3%
0.69
US$4,766 		6,883 +8.3% 0.69 US$4,766
2017-02-21 2017-02-17 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
200 +0.2%
0.69
US$138 		200 +0.2% 0.69 US$138
2017-02-08 2017-02-08 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
10,000 +13.8%
0.69
US$6,850 		10,000 +13.8% 0.69 US$6,850
2017-01-26 2017-01-25 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
9,700 +15.4%
0.70
US$6,759 		9,700 +15.4% 0.70 US$6,759
2017-01-26 2017-01-25 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
300 +0.5%
0.69
US$207 		300 +0.5% 0.69 US$207
2017-01-19 2017-01-19 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
600 +1.0%
0.69
US$417 		600 +1.0% 0.69 US$417
2017-01-19 2017-01-19 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
3,000 +5.1%
0.69
US$2,084 		3,000 +5.1% 0.69 US$2,084
2017-01-19 2017-01-19 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
6,400 +12.2%
0.70
US$4,448 		6,400 +12.2% 0.70 US$4,448
2015-04-02 2015-04-02 B Purchase
2.6
CAUWENBERGH GEERT

President & CEO

Executive Director
5,000 +8.0%
0.72
US$3,596 		5,000 +8.0% 0.72 US$3,596
2015-02-18 2015-02-17 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
4,000 +6.8%
1.17
US$4,680 		4,000 +6.8% 1.17 US$4,680
2015-02-11 2015-02-10 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
1,156 +2.0%
1.25
US$1,445 		1,156 +2.0% 1.25 US$1,445
2015-02-11 2015-02-10 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
644 +1.1%
1.24
US$799 		644 +1.1% 1.24 US$799
2015-02-11 2015-02-10 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
200 +0.4%
1.22
US$244 		200 +0.4% 1.22 US$244
2015-01-23 2015-01-22 B Purchase Bitterman Robert J Non-Executive Director
1,853 +39.9%
1.19
US$2,205 		1,853 +39.9% 1.19 US$2,205
2015-01-23 2015-01-22 B Purchase Bitterman Robert J Non-Executive Director
3,147 +209.8%
1.20
US$3,776 		3,147 +209.8% 1.20 US$3,776
2015-01-20 2015-01-20 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
10,000 +21.5%
1.03
US$10,300 		10,000 +21.5% 1.03 US$10,300
2014-12-31 2014-12-30 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
500 +1.1%
1.59
US$795 		500 +1.1% 1.59 US$795
2014-12-31 2014-12-30 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
2,000 +4.5%
1.59
US$3,173 		2,000 +4.5% 1.59 US$3,173
2014-10-14 2014-10-13 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
3,000 +7.3%
1.68
US$5,040 		3,000 +7.3% 1.68 US$5,040
2014-09-23 2014-09-19 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
4,500 +inf%
2.20
US$9,900 		4,500 +inf% 2.20 US$9,900
2014-09-16 2014-09-16 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
5,000 +12.2%
2.08
US$10,390 		5,000 +12.2% 2.08 US$10,390
2014-09-15 2014-09-15 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
2,000 +5.1%
2.19
US$4,380 		2,000 +5.1% 2.19 US$4,380
2014-09-15 2014-09-15 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
3,000 +8.3%
2.19
US$6,570 		3,000 +8.3% 2.19 US$6,570
2014-09-15 2014-09-15 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
5,000 +16.1%
2.18
US$10,900 		5,000 +16.1% 2.18 US$10,900
2014-08-04 2014-07-31 B Purchase Advanced RNA Technologies, LLC

No longer 10% owner
400 +0.0%
2.48
US$992 		400 +0.0% 2.48 US$992
2014-07-17 2014-07-15 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
1,000 +3.3%
2.50
US$2,500 		1,000 +3.3% 2.50 US$2,500
2014-07-09 2014-07-09 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
1,400 +4.9%
2.57
US$3,598 		1,400 +4.9% 2.57 US$3,598
2014-07-02 2014-07-02 B Purchase CAUWENBERGH GEERT

President & CEO

Executive Director
300 +1.1%
2.86
US$858 		300 +1.1% 2.86 US$858
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