Rapport Therapeutics RAPP Insider Ownership

NASDAQ RAPP

$29.26 +0.66 (+2.31%)

As of: Oct 20, 2026 · 3:59 PM EDT

Insider Holdings by Owner

11.39Mn Shares

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 Shares Traded (QoQ)

-151.82K

net selling 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 —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the trailing 12 months, RAPP insiders sold $47.66 million worth of shares (1.2Mn shares) in open-market trades, with no open-market purchases.

Counted by insider, open-market selling of RAPP stock in the past 12 months came from 5 insiders, with no insider buying.
Third Rock Ventures V, L.P. (10% owner) led open-market sales of Rapport Therapeutics stock over the past 12 months with $34.39 million (854.71K shares), most recently on May 26, 2026.
Abraham Ceesay (Chief Executive Officer) made the most recent open-market trade by an insider of Rapport Therapeutics, a sale of 1.15K shares for $35,167 on October 7, 2026.
Outside the open market, Rapport Therapeutics insiders received 9K 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 10.53Mn shares in total based on their latest Form 4 filings, or 21.96% of the 47.96Mn shares outstanding; that total is down 1.46% from 10.69Mn shares at the end of Q2 2026.
Rapport Therapeutics insiders hold 7.5Mn shares directly (71.25% of their total) and 3.03Mn shares (28.75%) indirectly, through entities such as trusts and partnerships.
The insider holdings in Rapport Therapeutics belong to 10 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. (10% owner, 7.25Mn shares), James Healy (Director, 2Mn shares) and Abraham Ceesay (Chief Executive Officer, 472.97K shares), based on their latest Form 4 filings.
Of the shares held by RAPP insiders, 68.86% belong to Third Rock Ventures V, L.P.
In the last 12 months, 49 Form 4 filings with transactions in RAPP stock came from 15 insiders.
This summary of Rapport Therapeutics insider activity covers Form 4 filings through October 8, 2026.

Form 4 Holdings

Insiders Holding RAPP

Insiders 11

Shares held 11.39Mn

Of outstanding 23.74%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Rock Ventures V, L.P. Third	TenPercentOwner	6,280,525	0	6,280,525	55.2%	28 May, 2026
2	Venture Partners Xii, Llc Arch	TenPercentOwner	0	3,728,738	3,728,738	32.7%	10 Jun, 2024
3	Abraham Ceesay	Chief Executive Officer	452,245	0	452,245	4.0%	08 Oct, 2026
4	David Bredt	Chief Scientific Officer	393,075	0	393,075	3.5%	19 Feb, 2026
5	Krishnaswamy Yeleswaram	Chief Development Officer	195,862	0	195,862	1.7%	26 Aug, 2026
6	Cheryl Gault	Chief Operating Officer	139,914	0	139,914	1.2%	01 Oct, 2026
7	James Healy	Director	0	113,626	113,626	1.0%	03 Jul, 2024
8	Steven M Paul	Director	0	41,666	41,666	0.4%	15 Sep, 2025
9	Reid M Huber	Director	20,400	0	20,400	0.2%	15 Sep, 2025
10	Troy A. Ignelzi	Chief Financial Officer	10,000	0	10,000	0.1%	13 Mar, 2025
11	Wendy B. Young	Director	9,500	0	9,500	0.1%	11 Sep, 2025

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

172 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
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
23 Sep, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	43	$41.05	$1.77K	456,767	Direct
08 Sep, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	7,141	$45.56	$325.31K	460,046	Direct
08 Sep, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	1,069	$46.01	$49.19K	458,977	Direct
24 Aug, 2026	Krishnaswamy Yeleswaram	Chief Development Officer	Disposed S	13,160	$50.00	$657.98K	232,862	Direct
25 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	18,921	$49.57	$937.96K	467,187	Direct
25 Aug, 2026	Krishnaswamy Yeleswaram	Chief Development Officer	Disposed S	20,799	$50.31	$1.05Mn	212,063	Direct
25 Aug, 2026	Krishnaswamy Yeleswaram	Chief Development Officer	Disposed S	16,201	$51.06	$827.18K	195,862	Direct
19 Aug, 2026	Krishnaswamy Yeleswaram	Chief Development Officer	Disposed S	404	$49.90	$20.16K	246,022	Direct
10 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	14,171	$45.97	$651.49K	523,436	Direct
10 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	8,370	$46.75	$391.28K	515,066	Direct
11 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	3,664	$46.90	$171.84K	511,402	Direct
11 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	19,500	$48.04	$936.85K	491,902	Direct
11 Aug, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	5,794	$48.62	$281.72K	486,108	Direct
27 Jul, 2026	Abraham Ceesay	Chief Executive Officer	Disposed S	2,203	$42.11	$92.76K	537,614	Direct

Showing 1 to 20 of 172 transactions