KROS

Keros Therapeutics, Inc.

Insider trading activity for Keros Therapeutics, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$80.3K

net selling

Bought(2 · 1 insiders): $20.9K
Sold(4 · 4 insiders): $101.1K

Past 6 months

-$137.8K

net selling

Bought(5 · 1 insiders): $53.4K
Sold(8 · 7 insiders): $191.1K

Past 12 months

-$181.1M

net selling

Bought(6 · 1 insiders): $75.8K
Sold(19 · 11 insiders): $181.2M

Transaction history

The 83 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 18	Newton Charles W.	Director	SSELL◷	551	$10.30	$5.7K	-4.3%	Open the original filing on SEC.gov
Aug 18	Cho Esther	Chief Legal Officer	SSELL	4,485	$10.29	$46.2K	-11.1%	Open the original filing on SEC.gov
Aug 18	Lerner Lorena Raquel	Chief Scientific Officer	SSELL	3,568	$10.29	$36.7K	-11.5%	Open the original filing on SEC.gov
Aug 18	Tanini Annita	Corp. Controller & VP,…	SSELL	1,224	$10.29	$12.6K	-2.6%	Open the original filing on SEC.gov
Aug 17	Bienaime Jean Jacques	Director	PBUY◷	1,000	$10.27	$10.3K	+5.4%	Open the original filing on SEC.gov
Jul 15	Bienaime Jean Jacques	Director	PBUY◷	1,000	$10.61	$10.6K	+5.7%	Open the original filing on SEC.gov
Jul 1	Prener Anne	Director	AGRANT◆	14,870	—	—	—	Open the original filing on SEC.gov
Jul 1	Prener Anne	Director	AGRANT	13,786	—	—	—	Open the original filing on SEC.gov
Jun 15	Bienaime Jean Jacques	Director	PBUY◷	1,000	$10.19	$10.2K	+6.0%	Open the original filing on SEC.gov
Jun 11	Newton Charles W.	Director	SSELL◷	550	$10.04	$5.5K	-4.2%	Open the original filing on SEC.gov
Jun 4	Seth Alpna	Director	SSELL◷	2,625	$10.72	$28.1K	-21.2%	Open the original filing on SEC.gov
Jun 4	Knowles Julius	Director	SSELL◷	2,625	$10.73	$28.2K	-19.3%	Open the original filing on SEC.gov
Jun 4	Farzan Nima	Director	SSELL◷	2,625	$10.73	$28.2K	-21.2%	Open the original filing on SEC.gov
Jun 3	Knowles Julius	Director	AGRANT◆	7,433	—	—	—	Open the original filing on SEC.gov
Jun 3	Knowles Julius	Director	AGRANT	7,142	—	—	+110.9%	Open the original filing on SEC.gov
Jun 3	Seth Alpna	Director	AGRANT◆	7,433	—	—	—	Open the original filing on SEC.gov
Jun 3	Seth Alpna	Director	AGRANT	7,142	—	—	+136.0%	Open the original filing on SEC.gov
Jun 3	Gray Mary Ann	Director	AGRANT◆	7,433	—	—	—	Open the original filing on SEC.gov
Jun 3	Gray Mary Ann	Director	AGRANT	7,142	—	—	+136.0%	Open the original filing on SEC.gov
Jun 3	Farzan Nima	Director	AGRANT◆	7,433	—	—	—	Open the original filing on SEC.gov
Jun 3	Farzan Nima	Director	AGRANT	7,142	—	—	+136.0%	Open the original filing on SEC.gov
Jun 3	Bienaime Jean Jacques	Director	AGRANT◆	7,433	—	—	—	Open the original filing on SEC.gov
Jun 3	Bienaime Jean Jacques	Director	AGRANT	7,142	—	—	+75.6%	Open the original filing on SEC.gov
May 15	Bienaime Jean Jacques	Director	PBUY◷	1,000	$10.58	$10.6K	+11.8%	Open the original filing on SEC.gov
Apr 15	Bienaime Jean Jacques	Director	PBUY◷	1,000	$11.70	$11.7K	+13.4%	Open the original filing on SEC.gov
Apr 2	Seehra Jasbir	Chief Executive Officer	MEXER◆	55,000	—	—	—	Open the original filing on SEC.gov
Apr 2	Seehra Jasbir	Chief Executive Officer	MEXER	55,000	$0.3	$16.5K	+14.3%	Open the original filing on SEC.gov
Mar 9	Newton Charles W.	Director	AGRANT◆	14,788	—	—	—	Open the original filing on SEC.gov
Mar 9	Newton Charles W.	Director	AGRANT	13,215	—	—	—	Open the original filing on SEC.gov
Mar 9	Bienaime Jean Jacques	Director	PBUY◷★	2,000	$11.21	$22.4K	+36.7%	Open the original filing on SEC.gov
Feb 24	Lerner Lorena Raquel	Chief Scientific Officer	AGRANT◆	75,000	—	—	—	Open the original filing on SEC.gov
Feb 24	Seehra Jasbir	Chief Executive Officer	AGRANT◆	100,000	—	—	—	Open the original filing on SEC.gov
Feb 24	Seehra Jasbir	Chief Executive Officer	AGRANT◆	217,000	—	—	—	Open the original filing on SEC.gov
Feb 24	Regnante Keith	Chief Financial Officer	AGRANT◆	60,000	—	—	—	Open the original filing on SEC.gov
Feb 24	Cho Esther	Chief Legal Officer	AGRANT◆	80,000	—	—	—	Open the original filing on SEC.gov
Feb 19	Seehra Jasbir	Chief Executive Officer	SSELL	7,015	$16.17	$113.4K	-1.8%	Open the original filing on SEC.gov
Feb 18	Lerner Lorena Raquel	Chief Science Officer	SSELL	3,873	$16.35	$63.3K	-11.1%	Open the original filing on SEC.gov
Feb 18	Regnante Keith	Chief Financial Officer	SSELL	4,739	$16.35	$77.5K	-10.8%	Open the original filing on SEC.gov
Feb 18	Cho Esther	SVP, General Counsel	SSELL	4,745	$16.35	$77.6K	-10.7%	Open the original filing on SEC.gov
Jan 7	Seehra Jasbir	Chief Executive Officer	AGRANT◆	62,500	—	—	—	Open the original filing on SEC.gov
Nov 21, 2025	Knowles Julius	Director	DTOISS	130,494	$17.75	$2.3M	-56.1%	Open the original filing on SEC.gov
Nov 21, 2025	Knowles Julius	Director	DTOISS	191,527	$17.75	$3.4M	-56.1%	Open the original filing on SEC.gov
Nov 21, 2025	Orbimed Advisors Llc	Director	DTOISS	74,465	$17.75	$1.3M	-62.3%	Open the original filing on SEC.gov
Nov 21, 2025	Orbimed Advisors Llc	Director	DTOISS	140,057	$17.75	$2.5M	-15.6%	Open the original filing on SEC.gov
Nov 21, 2025	Gordon Carl L	Director	DTOISS	74,465	$17.75	$1.3M	-62.3%	Open the original filing on SEC.gov
Nov 21, 2025	Gordon Carl L	Director	DTOISS	140,057	$17.75	$2.5M	-15.6%	Open the original filing on SEC.gov
Oct 15, 2025	ADAR1 Capital Management…	10% Owner	SSELL	743,358	$17.75	$13.2M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	ADAR1 Capital Management…	10% Owner	SSELL	254,669	$17.75	$4.5M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	ADAR1 Capital Management…	10% Owner	SSELL	4.4M	$17.75	$77.9M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	Kariv Tomer	Director, 10% Owner	SSELL	155,262	$17.75	$2.8M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	Kariv Tomer	Director, 10% Owner	SSELL	1.2M	$17.75	$21.8M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	Kariv Tomer	Director, 10% Owner	SSELL	1.1M	$17.75	$19.9M	-100.0%	Open the original filing on SEC.gov
Oct 15, 2025	Kariv Tomer	Director, 10% Owner	SSELL	2.3M	$17.75	$40.6M	-100.0%	Open the original filing on SEC.gov
Sep 3, 2025	Seehra Jasbir	Chief Executive Officer	AGRANT	90,500	—	—	+29.9%	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM◆	2	—	—	—	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM◆	14	—	—	—	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM◆	1	—	—	—	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM	200	$70.00	$14K	<0.1%	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM	1,400	$70.00	$98K	<0.1%	Open the original filing on SEC.gov
Jun 20, 2025	ADAR1 Capital Management…	10% Owner	XXITM	100	$60.00	$6K	0.0%	Open the original filing on SEC.gov
Jun 4, 2025	Knowles Julius	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Knowles Julius	Director	AGRANT	5,250	—	—	+440.8%	Open the original filing on SEC.gov
Jun 4, 2025	Seth Alpna	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Seth Alpna	Director	AGRANT	5,250	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Gray Mary Ann	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Gray Mary Ann	Director	AGRANT	5,250	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Gordon Carl L	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Gordon Carl L	Director	AGRANT	5,250	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Farzan Nima	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Farzan Nima	Director	AGRANT	5,250	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Bienaime Jean Jacques	Director	AGRANT◆	10,500	—	—	—	Open the original filing on SEC.gov
Jun 4, 2025	Bienaime Jean Jacques	Director	AGRANT	5,250	—	—	+2,625%	Open the original filing on SEC.gov
May 16, 2025	ADAR1 Capital Management…	10% Owner	EEXPS◆	178	—	—	—	Open the original filing on SEC.gov
May 16, 2025	ADAR1 Capital Management…	10% Owner	EEXPS◆	836	—	—	—	Open the original filing on SEC.gov
May 16, 2025	ADAR1 Capital Management…	10% Owner	EEXPS◆	300	—	—	—	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	JOTHER◆	74,333	—	—	—	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	JOTHER◆	500,000	—	—	—	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	JOTHER◆	325,000	—	—	—	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	PBUY	74,333	$10.33	$767.9K	+1.7%	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	PBUY	500,000	$10.33	$5.2M	+13.1%	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	PBUY▲	325,000	$9.86	$3.2M	+9.3%	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	PBUY	16,365	$9.40	$153.8K	+2.3%	Open the original filing on SEC.gov
Apr 9, 2025	ADAR1 Capital Management…	10% Owner	PBUY	18,560	$9.40	$174.4K	+0.5%	Open the original filing on SEC.gov

SSELL◷$5.7K

Newton Charles W. · DirectorAug 18

551 sh @ $10.30 · -4.3% own

SSELL$46.2K

Cho Esther · Chief Legal…Aug 18

4,485 sh @ $10.29 · -11.1% own

SSELL$36.7K

Lerner Lorena Raquel · Chief Scientific…Aug 18

3,568 sh @ $10.29 · -11.5% own

SSELL$12.6K

Tanini Annita · Corp. Controller…Aug 18

1,224 sh @ $10.29 · -2.6% own

PBUY◷$10.3K

Bienaime Jean Jacques · DirectorAug 17

1,000 sh @ $10.27 · +5.4% own

PBUY◷$10.6K

Bienaime Jean Jacques · DirectorJul 15

1,000 sh @ $10.61 · +5.7% own

AGRANT◆—

Prener Anne · DirectorJul 1

14,870 sh

AGRANT—

Prener Anne · DirectorJul 1

13,786 sh

PBUY◷$10.2K

Bienaime Jean Jacques · DirectorJun 15

1,000 sh @ $10.19 · +6.0% own

SSELL◷$5.5K

Newton Charles W. · DirectorJun 11

550 sh @ $10.04 · -4.2% own

SSELL◷$28.1K

Seth Alpna · DirectorJun 4

2,625 sh @ $10.72 · -21.2% own

SSELL◷$28.2K

Knowles Julius · DirectorJun 4

2,625 sh @ $10.73 · -19.3% own

SSELL◷$28.2K

Farzan Nima · DirectorJun 4

2,625 sh @ $10.73 · -21.2% own

AGRANT◆—

Knowles Julius · DirectorJun 3

7,433 sh

AGRANT—

Knowles Julius · DirectorJun 3

7,142 sh · +110.9% own

AGRANT◆—

Seth Alpna · DirectorJun 3

7,433 sh

AGRANT—

Seth Alpna · DirectorJun 3

7,142 sh · +136.0% own

AGRANT◆—

Gray Mary Ann · DirectorJun 3

7,433 sh

AGRANT—

Gray Mary Ann · DirectorJun 3

7,142 sh · +136.0% own

AGRANT◆—

Farzan Nima · DirectorJun 3

7,433 sh

AGRANT—

Farzan Nima · DirectorJun 3

7,142 sh · +136.0% own

AGRANT◆—

Bienaime Jean Jacques · DirectorJun 3

7,433 sh

AGRANT—

Bienaime Jean Jacques · DirectorJun 3

7,142 sh · +75.6% own

PBUY◷$10.6K

Bienaime Jean Jacques · DirectorMay 15

1,000 sh @ $10.58 · +11.8% own

PBUY◷$11.7K

Bienaime Jean Jacques · DirectorApr 15

1,000 sh @ $11.70 · +13.4% own

MEXER◆—

Seehra Jasbir · Chief Executive…Apr 2

55,000 sh

MEXER$16.5K

Seehra Jasbir · Chief Executive…Apr 2

55,000 sh @ $0.3 · +14.3% own

AGRANT◆—

Newton Charles W. · DirectorMar 9

14,788 sh

AGRANT—

Newton Charles W. · DirectorMar 9

13,215 sh

PBUY◷★$22.4K

Bienaime Jean Jacques · DirectorMar 9

2,000 sh @ $11.21 · +36.7% own

AGRANT◆—

Lerner Lorena Raquel · Chief Scientific…Feb 24

75,000 sh

AGRANT◆—

Seehra Jasbir · Chief Executive…Feb 24

100,000 sh

AGRANT◆—

Seehra Jasbir · Chief Executive…Feb 24

217,000 sh

AGRANT◆—

Regnante Keith · Chief Financial…Feb 24

60,000 sh

AGRANT◆—

Cho Esther · Chief Legal…Feb 24

80,000 sh

SSELL$113.4K

Seehra Jasbir · Chief Executive…Feb 19

7,015 sh @ $16.17 · -1.8% own

SSELL$63.3K

Lerner Lorena Raquel · Chief Science…Feb 18

3,873 sh @ $16.35 · -11.1% own

SSELL$77.5K

Regnante Keith · Chief Financial…Feb 18

4,739 sh @ $16.35 · -10.8% own

SSELL$77.6K

Cho Esther · SVP, General…Feb 18

4,745 sh @ $16.35 · -10.7% own

AGRANT◆—

Seehra Jasbir · Chief Executive…Jan 7

62,500 sh

DTOISS$2.3M

Knowles Julius · DirectorNov 21, 2025

130,494 sh @ $17.75 · -56.1% own

DTOISS$3.4M

Knowles Julius · DirectorNov 21, 2025

191,527 sh @ $17.75 · -56.1% own

DTOISS$1.3M

Orbimed Advisors Llc · DirectorNov 21, 2025

74,465 sh @ $17.75 · -62.3% own

DTOISS$2.5M

Orbimed Advisors Llc · DirectorNov 21, 2025

140,057 sh @ $17.75 · -15.6% own

DTOISS$1.3M

Gordon Carl L · DirectorNov 21, 2025

74,465 sh @ $17.75 · -62.3% own

DTOISS$2.5M

Gordon Carl L · DirectorNov 21, 2025

140,057 sh @ $17.75 · -15.6% own

SSELL$13.2M

ADAR1 Capital Management… · 10% OwnerOct 15, 2025

743,358 sh @ $17.75 · -100.0% own

SSELL$4.5M

ADAR1 Capital Management… · 10% OwnerOct 15, 2025

254,669 sh @ $17.75 · -100.0% own

SSELL$77.9M

ADAR1 Capital Management… · 10% OwnerOct 15, 2025

4.4M sh @ $17.75 · -100.0% own

SSELL$2.8M

Kariv Tomer · Director, 10%…Oct 15, 2025

155,262 sh @ $17.75 · -100.0% own

SSELL$21.8M

Kariv Tomer · Director, 10%…Oct 15, 2025

1.2M sh @ $17.75 · -100.0% own

SSELL$19.9M

Kariv Tomer · Director, 10%…Oct 15, 2025

1.1M sh @ $17.75 · -100.0% own

SSELL$40.6M

Kariv Tomer · Director, 10%…Oct 15, 2025

2.3M sh @ $17.75 · -100.0% own

AGRANT—

Seehra Jasbir · Chief Executive…Sep 3, 2025

90,500 sh · +29.9% own

XXITM◆—

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

2 sh

XXITM◆—

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

14 sh

XXITM◆—

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

1 sh

XXITM$14K

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

200 sh @ $70.00 · <0.1% own

XXITM$98K

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

1,400 sh @ $70.00 · <0.1% own

XXITM$6K

ADAR1 Capital Management… · 10% OwnerJun 20, 2025

100 sh @ $60.00 · 0.0% own

AGRANT◆—

Knowles Julius · DirectorJun 4, 2025

10,500 sh

AGRANT—

Knowles Julius · DirectorJun 4, 2025

5,250 sh · +440.8% own

AGRANT◆—

Seth Alpna · DirectorJun 4, 2025

10,500 sh

AGRANT—

Seth Alpna · DirectorJun 4, 2025

5,250 sh

AGRANT◆—

Gray Mary Ann · DirectorJun 4, 2025

10,500 sh

AGRANT—

Gray Mary Ann · DirectorJun 4, 2025

5,250 sh

AGRANT◆—

Gordon Carl L · DirectorJun 4, 2025

10,500 sh

AGRANT—

Gordon Carl L · DirectorJun 4, 2025

5,250 sh

AGRANT◆—

Farzan Nima · DirectorJun 4, 2025

10,500 sh

AGRANT—

Farzan Nima · DirectorJun 4, 2025

5,250 sh

AGRANT◆—

Bienaime Jean Jacques · DirectorJun 4, 2025

10,500 sh

AGRANT—

Bienaime Jean Jacques · DirectorJun 4, 2025

5,250 sh · +2,625% own

EEXPS◆—

ADAR1 Capital Management… · 10% OwnerMay 16, 2025

178 sh

EEXPS◆—

ADAR1 Capital Management… · 10% OwnerMay 16, 2025

836 sh

EEXPS◆—

ADAR1 Capital Management… · 10% OwnerMay 16, 2025

300 sh

JOTHER◆—

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

74,333 sh

JOTHER◆—

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

500,000 sh

JOTHER◆—

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

325,000 sh

PBUY$767.9K

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

74,333 sh @ $10.33 · +1.7% own

PBUY$5.2M

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

500,000 sh @ $10.33 · +13.1% own

PBUY▲$3.2M

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

325,000 sh @ $9.86 · +9.3% own

PBUY$153.8K

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

16,365 sh @ $9.40 · +2.3% own

PBUY$174.4K

ADAR1 Capital Management… · 10% OwnerApr 9, 2025

18,560 sh @ $9.40 · +0.5% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

4 of 45 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 15 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Nov 21, 2025	Dec 17, 2025	Knowles JuliusDirector	15days	$3.4M	Filing ↗
Nov 21, 2025	Dec 17, 2025	Gordon Carl LDirector	15days	$2.5M	Filing ↗
Nov 21, 2025	Dec 17, 2025	Orbimed Advisors Llc +2Director	15days	$2.5M	Filing ↗
May 16, 2025	Jun 11, 2025	ADAR1 Capital Management… +310% Owner	15days	—	Filing ↗

Knowles JuliusDirector

15days

Traded Nov 21, 2025 · filed Dec 17, 2025Filing ↗

Gordon Carl LDirector

15days

Traded Nov 21, 2025 · filed Dec 17, 2025Filing ↗

Orbimed Advisors Llc +2Director

15days

Traded Nov 21, 2025 · filed Dec 17, 2025Filing ↗

ADAR1 Capital Management… +310% Owner

15days

Traded May 16, 2025 · filed Jun 11, 2025Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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