Rapport Therapeutics RAPP Insider Ownership

NASDAQ RAPP

$26.55 +0.59 (+2.27%)

As of: Nov 11, 2026 · 11:08 AM EST

Insider Holdings by Owner

16.60Mn Shares

Rock Ventures V, L.P. Third8.68Mn52.3%

Venture Partners Xii, Llc Arch3.73Mn22.5%

James Healy2.87Mn17.3%

Abraham Ceesay450.04K2.7%

David Bredt393.08K2.4%

Other insiders (9)479.04K2.9%

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

21.96%

▼-0.317% pp QoQ

Shares Held by Insiders

10.53Mn

filed for Sep 2026

▼-1.42% QoQ

Shares Outstanding

47.96Mn

47,955,079 shares

Direct Holdings

7.51Mn

Indirect: 3.03Mn

Net Open-Market Trades

-151.82K

net sold · -$7.14Mn in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Open-Market Insider Trades

Bought Sold

Latest quarter —

Net over range —

Net-buying quarters —

Insider Ownership Summary

Updated Nov 4, 2026

Over the trailing 12 months, RAPP insiders bought $22.02 million worth of shares (1.03Mn shares) and sold $47.22 million worth (1.19Mn shares) in open-market trades.

Counted by insider, open-market buying of RAPP stock in the past 12 months came from 7 insiders and selling from 5 insiders.
Among Rapport Therapeutics' insiders, the largest open-market purchases in the past 12 months were by James Healy (Director), totaling $20.36 million (969.48K shares), most recently on October 28, 2026.
On the selling side, Third Rock Ventures V, L.P. (10% owner) sold the most Rapport Therapeutics stock on the open market over the past 12 months, $34.39 million (854.71K shares), most recently on May 26, 2026.
Outside the open market, Rapport Therapeutics insiders received 1.44Mn shares in stock awards and acquired 11K shares through option exercises and conversions over the past 12 months.
Per Business Quant data, Rapport Therapeutics insiders hold 13.03Mn shares in total based on their latest Form 4 filings, or 27.17% of the 47.96Mn shares outstanding; that total is up 21.92% from 10.69Mn shares at the end of Q2 2026.
Rapport Therapeutics insiders hold 7.75Mn shares directly (59.49% of their total) and 5.28Mn shares (40.51%) indirectly, through entities such as trusts and partnerships.
The insider holdings in Rapport Therapeutics belong to 13 insiders who have reported on Form 4 within the past two years.
Rapport Therapeutics' three biggest insider holders are Third Rock Ventures V, L.P. (Director and 10% owner, 8.68Mn shares), James Healy (Director, 3.01Mn shares) and Abraham Ceesay (Chief Executive Officer, 470.76K shares), based on their latest Form 4 filings.
Of the shares held by RAPP insiders, 66.62% belong to Third Rock Ventures V, L.P.
In the last 12 months, 56 Form 4 filings with transactions in RAPP stock came from 15 insiders.
This summary of Rapport Therapeutics insider activity covers Form 4 filings through November 3, 2026.

Form 4 Holdings

Insiders Holding RAPP

Insiders 14

Shares held 16.60Mn

Of outstanding 34.62%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Rock Ventures V, L.P. Third	Director, TenPercentOwner	6,518,620	2,159,694	8,678,314	52.3%	03 Nov, 2026
2	Venture Partners Xii, Llc Arch	TenPercentOwner	0	3,728,738	3,728,738	22.5%	10 Jun, 2024
3	James Healy	Director	0	2,873,888	2,873,888	17.3%	30 Oct, 2026
4	Abraham Ceesay	Chief Executive Officer	450,035	0	450,035	2.7%	23 Oct, 2026
5	David Bredt	Chief Scientific Officer	393,075	0	393,075	2.4%	19 Feb, 2026
6	Krishnaswamy Yeleswaram	Chief Development Officer	195,862	0	195,862	1.2%	26 Aug, 2026
7	Cheryl Gault	Chief Operating Officer	139,914	0	139,914	0.8%	01 Oct, 2026
8	Steven M Paul	Director	0	77,380	77,380	0.5%	22 Oct, 2026
9	Reid M Huber	Director	20,400	0	20,400	0.1%	15 Sep, 2025
10	Troy A. Ignelzi	Chief Financial Officer	15,500	0	15,500	0.1%	21 Oct, 2026
11	Wendy B. Young	Director	13,289	0	13,289	0.1%	22 Oct, 2026
12	John Maraganore	Director	0	9,411	9,411	0.1%	22 Oct, 2026
13	Paul M Silva	Director	0	3,680	3,680	0.0%	22 Oct, 2026
14	Ramiro Sanchez	Director	3,600	0	3,600	0.0%	23 Oct, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

186 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Oct, 2026	Rock Ventures V, L.P. Third	Director, TenPercentOwner	Acquired A	238,095	$21.00	$5.00Mn	6,518,620	Direct
30 Oct, 2026	Rock Ventures V, L.P. Third	Director, TenPercentOwner	Acquired A	1,190,476	$21.00	$25.00Mn	2,159,694	Indirect
28 Oct, 2026	James Healy	Director	Acquired P	952,380	$21.00	$20.00Mn	2,815,707	Indirect
28 Oct, 2026	James Healy	Director	Acquired P	6,395	$21.00	$134.30K	17,990	Indirect
28 Oct, 2026	James Healy	Director	Acquired P	3,772	$21.00	$79.21K	14,924	Indirect
28 Oct, 2026	James Healy	Director	Acquired P	6,933	$21.00	$145.59K	25,267	Indirect
23 Oct, 2026	Ramiro Sanchez	Director	Acquired P	3,600	$27.35	$98.48K	3,600	Direct
21 Oct, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	2,210	$29.16	$64.45K	450,035	Direct
22 Oct, 2026	Wendy B. Young	Director	Acquired P	3,789	$26.39	$99.99K	13,289	Direct
22 Oct, 2026	Steven M Paul	Director	Acquired P	35,714	$27.28	$974.28K	77,380	Indirect
22 Oct, 2026	John Maraganore	Director	Acquired P	8,239	$26.38	$217.34K	8,239	Indirect
22 Oct, 2026	Paul M Silva	Director	Acquired P	3,680	$27.08	$99.64K	3,680	Indirect
22 Oct, 2026	John Maraganore	Director	Acquired P	1,172	$26.92	$31.55K	9,411	Indirect
21 Oct, 2026	Troy A. Ignelzi	Chief Financial Officer	Acquired P	5,500	$26.10	$143.55K	15,500	Direct
06 Oct, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	3,375	$32.03	$108.11K	453,392	Direct
07 Oct, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	1,147	$30.66	$35.17K	452,245	Direct
30 Sep, 2026	Cheryl Gault	Chief Operating Officer	Disposed S	7,925	$33.04	$261.81K	141,989	Direct
30 Sep, 2026	Cheryl Gault	Chief Operating Officer	Disposed S	2,075	$33.76	$70.04K	139,914	Direct
23 Sep, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	1,952	$39.05	$76.23K	457,025	Direct
23 Sep, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	215	$39.86	$8.57K	456,810	Direct

Showing 1 to 20 of 186 transactions