Iambic Therapeutics IAM Insider Ownership

NASDAQ IAM

$14.78 +1.52 (+11.46%)

At close: Nov 10, 2026 · 4:00 PM EST

Insider Holdings by Owner

5.40Mn Shares

Frederick R Manby1.86Mn34.5%

Thomas F. Miller1.41Mn26.1%

Capital Management, Lp Catalio742.55K13.8%

R Jacob Vogelstein742.55K13.8%

Michael Secora279.90K5.2%

Other insiders (4)361.04K6.7%

Insider Ownership Statistics

as of 31 Dec, 2026

Insider Ownership

—

share count not reported for this filer set

Shares Held by Insiders

4.66Mn

filed for Dec 2026

Shares Outstanding

—

not reported

Direct Holdings

3.66Mn

Indirect: 1.00Mn

Net Open-Market Trades

+718.75K

net bought · $11.50Mn in Dec 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 Oct 21, 2026

Across the past 12 months, open-market trades by Iambic Therapeutics insiders were all purchases, totaling $11.5 million (718.75K shares).

Among IAM insiders, Evan Lockwood Rachlin (Director) bought the most stock on the open market in the past 12 months: $11.5 million (718.75K shares), most recently on October 16, 2026.
Away from the open market, IAM insiders received 211.1K shares in stock awards and acquired 6.39Mn shares through option exercises and conversions over the last 12 months.
According to Business Quant data, insiders at Iambic Therapeutics reported 4.66Mn shares in total in their latest Form 4 filings.
Of the 4.66Mn shares held by Iambic Therapeutics insiders, 3.66Mn shares (78.50%) are held directly and 1Mn shares (21.50%) indirectly, through trusts, partnerships, family members and other entities.
IAM's insider total is spread across 8 insiders who have filed a Form 4 in the past two years.
IAM's three largest insider shareholders, per their latest Form 4 filings, are Frederick R. Manby (Chief Technology Officer, 1.86Mn shares), Thomas F. Miller (Chief Executive Officer, 1.41Mn shares) and R. Jacob Vogelstein (Director, 742.55K shares).
The largest insider, Frederick R. Manby, holds 40.00% of IAM's insider total.
In the last 12 months, 16 Form 4 filings with transactions in IAM stock came from 12 insiders.
This summary of Iambic Therapeutics insider activity covers Form 4 filings through October 19, 2026.

Form 4 Holdings

Insiders Holding IAM

Insiders 9

Shares held 5.40Mn

Of outstanding —

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Frederick R Manby	Chief Technology Officer	1,862,665	0	1,862,665	34.5%	16 Oct, 2026
2	Thomas F. Miller	Chief Executive Officer	1,410,756	0	1,410,756	26.1%	16 Oct, 2026
3	Capital Management, Lp Catalio	TenPercentOwner	0	742,546	742,546	13.8%	19 Oct, 2026
4	R Jacob Vogelstein	Director	0	742,546	742,546	13.8%	19 Oct, 2026
5	Michael Secora	Cfo Chief Corp Dev Ofcr	279,902	0	279,902	5.2%	19 Oct, 2026
6	William H Rastetter	Director, Other	0	200,920	200,920	3.7%	19 Oct, 2026
7	Neil Josephson	Chief Medical Officer	71,459	0	71,459	1.3%	16 Oct, 2026
8	Evan Lockwood Rachlin	Director	0	57,754	57,754	1.1%	19 Oct, 2026
9	Peter A Olson	Chief Scientific Officer	30,909	0	30,909	0.6%	16 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

49 Insider Transactions

Source SEC Form 4

Latest quarter Dec 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
16 Oct, 2026	Capital Management, Lp Catalio	TenPercentOwner	Acquired C	1,995,749	—	—	1,995,749	Indirect
16 Oct, 2026	Evan Lockwood Rachlin	Director	Acquired C	1,458,736	—	—	1,458,736	Indirect
16 Oct, 2026	R Jacob Vogelstein	Director	Acquired C	1,995,749	—	—	1,995,749	Indirect
16 Oct, 2026	William H Rastetter	Director, Other	Acquired C	192,579	—	—	192,579	Indirect
16 Oct, 2026	Michael Secora	Cfo Chief Corp Dev Ofcr	Acquired C	61,342	—	—	279,902	Direct
16 Oct, 2026	R Jacob Vogelstein	Director	Acquired C	1,458,290	—	—	1,458,290	Indirect
16 Oct, 2026	William H Rastetter	Director, Other	Acquired C	8,341	—	—	200,920	Indirect
16 Oct, 2026	Capital Management, Lp Catalio	TenPercentOwner	Acquired C	1,458,290	—	—	1,458,290	Indirect
16 Oct, 2026	Evan Lockwood Rachlin	Director	Acquired C	410,762	—	—	1,869,498	Indirect
16 Oct, 2026	Michael Secora	Cfo Chief Corp Dev Ofcr	Disposed C	61,342	$0.00	$0	0	Direct
16 Oct, 2026	Capital Management, Lp Catalio	TenPercentOwner	Acquired C	742,546	—	—	742,546	Indirect
16 Oct, 2026	Evan Lockwood Rachlin	Director	Acquired P	718,750	$16.00	$11.50Mn	2,588,248	Indirect
16 Oct, 2026	William H Rastetter	Director, Other	Disposed C	76,801	$0.00	$0	0	Indirect
16 Oct, 2026	R Jacob Vogelstein	Director	Acquired C	742,546	—	—	742,546	Indirect
16 Oct, 2026	R Jacob Vogelstein	Director	Disposed C	1,141,878	$0.00	$0	0	Indirect
16 Oct, 2026	Capital Management, Lp Catalio	TenPercentOwner	Disposed C	1,141,878	$0.00	$0	0	Indirect
16 Oct, 2026	William H Rastetter	Director, Other	Disposed C	64,001	$0.00	$0	0	Indirect
16 Oct, 2026	Evan Lockwood Rachlin	Director	Acquired C	57,754	—	—	57,754	Indirect
16 Oct, 2026	William H Rastetter	Director, Other	Disposed C	36,805	$0.00	$0	0	Indirect
16 Oct, 2026	Capital Management, Lp Catalio	TenPercentOwner	Disposed C	731,187	$0.00	$0	0	Indirect

Showing 1 to 20 of 49 transactions