Kodiak Sciences KOD Insider Ownership

NASDAQ KOD

$105.74 -1.36 (-1.27%)

As of: Nov 10, 2026 · 12:24 PM EST

Insider Holdings by Owner

23.49Mn Shares

Bros. Advisors Lp Baker19.52Mn83.1%

Victor Perlroth3.68Mn15.7%

John A. Borgeson211.93K0.9%

Jason Ehrlich61.92K0.3%

Taiyin Yang20.00K0.1%

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

37.25%

▲+3.88% pp QoQ

Shares Held by Insiders

23.40Mn

filed for Sep 2026

▲+11.63% QoQ

Shares Outstanding

62.83Mn

62,830,860 shares

Direct Holdings

3.89Mn

Indirect: 19.52Mn

Net Open-Market Trades

+1.94Mn

net bought · $156.99Mn 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 Oct 27, 2026

Across the past 12 months, open-market trades by Kodiak Sciences insiders totaled $216.99 million in purchases (4.55Mn shares) and $4.92 million in sales (90K shares).

Among KOD's insiders, Baker Bros. Advisors LP (Director and 10% owner) was the top open-market buyer in the past 12 months, with $216.99 million of stock purchased (4.55Mn shares) and the latest purchase on September 29, 2026.
Meanwhile, the largest open-market sales of KOD in the past 12 months were by John A. Borgeson (Chief Financial Officer), totaling $4.92 million (90K shares), most recently on October 21, 2026.
Outside the open market, Kodiak Sciences insiders acquired 1.72Mn shares through option exercises and conversions over the past 12 months.
Per Business Quant data, Kodiak Sciences insiders hold 23.42Mn shares in total based on their latest Form 4 filings, or 37.28% of the 62.83Mn shares outstanding; that total is up 11.72% from 20.97Mn shares at the end of Q2 2026 and up 27.87% from 18.32Mn shares at the end of Q3 2025.
By type of ownership, KOD insiders hold 16.68% of their shares directly (3.91Mn shares) and 83.32% indirectly (19.52Mn shares).
Business Quant counts 4 insiders with holdings in Kodiak Sciences stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
KOD's three largest insider shareholders, per their latest Form 4 filings, are Baker Bros. Advisors LP (Director and 10% owner, 19.52Mn shares), Victor Perlroth (Chairman and CEO, 3.68Mn shares) and John A. Borgeson (Chief Financial Officer, 211.93K shares).
Baker Bros. Advisors LP holds 83.32% of the combined insider position in Kodiak Sciences.
Over the past 12 months, 8 insiders reported transactions in Kodiak Sciences stock in 20 Form 4 filings.
These insider figures for Kodiak Sciences are based on Form 4 filings through October 26, 2026.

Form 4 Holdings

Insiders Holding KOD

Insiders 5

Shares held 23.49Mn

Of outstanding 37.38%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Bros. Advisors Lp Baker	Director, TenPercentOwner	0	19,515,907	19,515,907	83.1%	30 Sep, 2026
2	Victor Perlroth	Chairman And Ceo	3,676,062	0	3,676,062	15.7%	29 Sep, 2026
3	John A. Borgeson	Chief Financial Officer	211,930	0	211,930	0.9%	23 Oct, 2026
4	Jason Ehrlich	Officer	61,924	0	61,924	0.3%	16 Jun, 2023
5	Taiyin Yang	Director	20,000	0	20,000	0.1%	26 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

718 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
23 Oct, 2026	Taiyin Yang	Director	Acquired M	20,000	$2.35	$47.00K	20,000	Direct
23 Oct, 2026	Taiyin Yang	Director	Disposed M	20,000	$0.00	$0	20,000	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Acquired M	30,000	$2.49	$74.70K	241,930	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	8,514	$87.67	$746.42K	233,416	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	1,677	$89.20	$149.59K	231,739	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	7,623	$89.74	$684.09K	224,116	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	5,101	$90.98	$464.09K	219,015	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	2,985	$91.76	$273.90K	216,030	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	2,000	$92.66	$185.32K	214,030	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	2,000	$93.71	$187.42K	212,030	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed S	100	$94.91	$9.49K	211,930	Direct
21 Oct, 2026	John A. Borgeson	Chief Financial Officer	Disposed M	30,000	$0.00	$0	304,500	Direct
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	534	$79.40	$42.40K	1,606,426	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	186	$86.72	$16.13K	1,629,628	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	856	$61.21	$52.40K	1,561,270	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	14,344	$61.21	$878.00K	18,373,116	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	8,956	$79.40	$711.15K	19,130,090	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	3,114	$86.72	$270.05K	19,519,021	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	17	$79.63	$1.35K	1,606,443	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	2,666	$61.63	$164.29K	1,563,936	Indirect

Showing 1 to 20 of 718 transactions