Kodiak Sciences KOD Insider Ownership

NASDAQ KOD

$92.97 +1.62 (+1.77%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

23.47Mn Shares

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 Shares Traded (QoQ)

+2.44Mn

net buying 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

Across the past 12 months, open-market trades by Kodiak Sciences insiders totaled $216.99 million in purchases (4.55Mn shares) and $2.22 million in sales (60K 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 $2.22 million (60K shares), most recently on June 4, 2026.
Outside the open market, Kodiak Sciences insiders acquired 1.67Mn shares through option exercises and conversions over the past 12 months.
Per Business Quant data, Kodiak Sciences insiders hold 23.4Mn shares in total based on their latest Form 4 filings, or 37.25% of the 62.83Mn shares outstanding; that total is up 11.63% from 20.97Mn shares at the end of Q2 2026 and up 27.76% from 18.32Mn shares at the end of Q3 2025.
By type of ownership, KOD insiders hold 16.61% of their shares directly (3.89Mn shares) and 83.39% indirectly (19.52Mn shares).
Business Quant counts 3 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 83.39% of the combined insider position in Kodiak Sciences.
Over the past 12 months, 8 insiders reported transactions in Kodiak Sciences stock in 18 Form 4 filings.
These insider figures for Kodiak Sciences are based on Form 4 filings through September 30, 2026.

Form 4 Holdings

Insiders Holding KOD

Insiders 4

Shares held 23.47Mn

Of outstanding 37.35%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Bros. Advisors Lp Baker	Director, TenPercentOwner	0	19,515,907	19,515,907	83.2%	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%	05 Jun, 2026
4	Jason Ehrlich	Officer	61,924	0	61,924	0.3%	16 Jun, 2023

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

706 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
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	186	$86.72	$16.13K	1,629,628	Indirect
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	3,114	$86.72	$270.05K	19,519,021	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	14,344	$61.21	$878.00K	18,373,116	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	957	$86.81	$83.08K	1,630,585	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
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	44,690	$61.63	$2.75Mn	18,417,806	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	16,036	$86.81	$1.39Mn	19,535,057	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	283	$79.63	$22.54K	19,130,373	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	884	$79.71	$70.46K	1,607,327	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	243	$62.96	$15.30K	1,564,179	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	3,790	$86.94	$329.51K	1,634,375	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	63,539	$86.94	$5.52Mn	19,598,596	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	4,067	$62.96	$256.07K	18,421,873	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	14,827	$79.71	$1.18Mn	19,145,200	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	4,485	$87.51	$392.47K	1,638,860	Indirect
28 Sep, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired P	479	$64.43	$30.86K	1,564,658	Indirect

Showing 1 to 20 of 706 transactions