AMAM

Ambrx Biopharma, Inc.

Total Trades

7

Buys

5

Sells

2

Largest Trade

$1M+

Insiders

3

Institutional Funds

1

Inst. Value

$500K+

Activist Filings

20

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Nelson SonjaCFOSELL$100K–$500K13K$9.82Oct 31, 2023
O'Connor Daniel J.President and CEOSELL$100K–$500K50K$9.82Oct 31, 2023
Cormorant Asset Management, LP10% OwnerBUY$1M+1.3M$6.99Oct 25, 2023
Cormorant Asset Management, LP10% OwnerBUY$1M+2.2M$9.12Sep 19, 2023
Cormorant Asset Management, LP10% OwnerBUY$1M+5.2M$11.30Apr 20, 2023
Cormorant Asset Management, LP10% OwnerBUY$1M+2.6M$9.75Apr 17, 2023
Cormorant Asset Management, LP10% OwnerBUY$1M+1.0M$10.21Mar 16, 2023
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Institutional Ownership

13F filings as of Dec 31, 2021 · 1 funds holding

FundShares
NORGES BANK70K

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Invus Public Equities, L.P.

SC 13G/A · Feb 9, 2024

0.0%

0 shares

HOPU Reunion Company Ltd.

SC 13G · Oct 10, 2023

8.9%

39.0M shares

SC 13G · Sep 25, 2023

0.0%

0 shares

Darwin Global Management, Ltd.

SC 13D/A · Jun 28, 2023

27.5%

116.8M shares

Darwin Global Management, Ltd.

SC 13D/A · May 25, 2023

20.5%

79.1M shares

Commodore Capital LP

SC 13G/A · Apr 27, 2023

8.1%

31.2M shares

14.4%

42.8M shares

Darwin Global Management, Ltd.

SC 13D · Mar 8, 2023

26.4%

79.1M shares

Commodore Capital LP

SC 13G/A · Mar 3, 2023

13.2%

35.7M shares

Commodore Capital LP

SC 13G · Mar 3, 2023

9.7%

26.3M shares

9.9%

26.7M shares

3.1%

8.4M shares

2.4%

6.5M shares

Darwin Global Management, Ltd.

SC 13G/A · Feb 14, 2023

19.6%

53.1M shares

Invus Public Equities, L.P.

SC 13G/A · Feb 11, 2023

5.6%

15.1M shares

Darwin Global Management, Ltd.

SC 13G · Dec 19, 2022

18.7%

50.6M shares

FMR LLC

SC 13G/A · Mar 10, 2022

10.7%

26.8M shares

3.1%

7.5M shares

6.9%

16.9M shares

Adage Capital Partners, L.P.

SC 13G · Jan 18, 2022

5.8%

14.2M shares