Insider · CIK 0001683811

Sacks Natalie

Reports to the SEC for 5 companies · BERKELEY, CA

sec.gov

Transactions

Companies

Filings

CIK

0001683811

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-02-20	CRBUCaribou Biosciences, Inc. · Option to purchase Common StockA Award	Director	AAward	+45K sh	—	—	45,000
2025-02-20	CRBUCaribou Biosciences, Inc. · Option to purchase Common StockA Award	Director	AAward	+40.5K sh	—	—	40,500
2024-02-20	CRBUCaribou Biosciences, Inc. · Option to purchase Common StockA Award	Director	AAward	+39.5K sh	—	—	39,500
2023-02-21	CRBUCaribou Biosciences, Inc. · Option to purchase Common StockA Award	Director	AAward	+21.5K sh	—	—	21,500
2022-12-21	ZYMEZymeworks Inc. · Stock Option (Right to Buy)A Award	Director	AAward	+25K sh	—	—	25,000
2022-01-28	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)A Award	Chief Medical Officer	AAward	+155K sh	—	—	155,000
2021-12-20	CRBUCaribou Biosciences, Inc. · Option to purchase Common StockA Award	Director	AAward	+27.5K sh	—	—	27,500
2021-11-11	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)A Award	Chief Medical Officer	AAward	+155K sh	—	—	155,000
2021-05-06	Zymeworks BC Inc.Stock Option (Right to Buy)A Award	Director	AAward	+9,000 sh	—	—	9,000
2021-01-28	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)A Award	Chief Medical Officer	AAward	+80K sh	—	—	80,000
2020-05-18	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1,522 sh	$2.12	+$3,226.64	47,276
2020-05-18	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1,522 sh	$14.77	−$22.5K	45,754
2020-05-18	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−1,522 sh	—	—	45,625
2020-05-08	Zymeworks BC Inc.Stock Option (Right to Buy)A Award	Director	AAward	+9,000 sh	—	—	9,000
2020-05-01	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+5,826 sh	$2.12	+$12.4K	51,580
2020-05-01	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−5,826 sh	$12.07	−$70.3K	45,754
2020-05-01	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−5,826 sh	—	—	168,926
2020-04-17	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1,021 sh	$2.12	+$2,164.52	46,775
2020-04-17	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1,021 sh	$12.08	−$12.3K	45,754
2020-04-17	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−1,021 sh	—	—	47,147
2020-04-16	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+500 sh	$2.12	+$1,060	46,254
2020-04-16	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−500 sh	$12.00	−$6,000	45,754
2020-04-16	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−500 sh	—	—	48,168
2020-04-13	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+4,556 sh	$2.12	+$9,658.72	50,310
2020-04-13	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−4,556 sh	$12.06	−$55K	45,754
2020-04-13	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−4,556 sh	—	—	174,752
2020-04-07	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+570 sh	$2.12	+$1,208.4	46,324
2020-04-07	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−570 sh	$12.00	−$6,840	45,754
2020-04-07	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−570 sh	—	—	179,308
2020-04-06	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+700 sh	$2.12	+$1,484	46,454
2020-04-06	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−700 sh	$12.00	−$8,400.98	45,754
2020-04-06	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−700 sh	—	—	179,878
2020-03-17	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1,520 sh	$2.12	+$3,222.4	47,274
2020-03-17	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1,520 sh	$12.00	−$18.2K	45,754
2020-03-17	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−1,520 sh	—	—	48,668
2020-03-16	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1 sh	$2.12	+$2.12	45,755
2020-03-16	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1 sh	$12.00	−$12	45,754
2020-03-16	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−1 sh	—	—	50,188
2020-03-02	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+5,826 sh	$2.12	+$12.4K	51,580
2020-03-02	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−5,826 sh	$14.68	−$85.5K	45,754
2020-03-02	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−5,826 sh	—	—	180,578
2020-02-18	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1,521 sh	$2.12	+$3,224.52	47,275
2020-02-18	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1,521 sh	$15.00	−$22.8K	45,754
2020-02-18	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−1,521 sh	—	—	50,189
2020-02-03	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+5,826 sh	$2.12	+$12.4K	51,580
2020-02-03	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−5,826 sh	$13.90	−$81K	45,754
2020-02-03	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	−5,826 sh	—	—	186,404
2020-01-31	Harpoon Therapeutics, Inc.Employee Stock Option (right to buy)A Award	Chief Medical Officer	AAward	+75.4K sh	—	—	75,440
2020-01-16	Harpoon Therapeutics, Inc.M Exercise/Conversion	Chief Medical Officer	MExercise/Conversion	+1,521 sh	$2.12	+$3,224.52	47,275
2020-01-16	Harpoon Therapeutics, Inc.S Sale	Chief Medical Officer	SSale	−1,521 sh	$14.94	−$22.7K	45,754

Recent filings

Accepted (ET)
Feb 204
Sacks Natalie0001683811-26-000002
SEC(opens sec.gov)
Feb 214
Sacks Natalie0001683811-25-000003
SEC(opens sec.gov)
Feb 224
Sacks Natalie0001628280-24-006412
SEC(opens sec.gov)
Feb 234
Sacks Natalie0001619856-23-000024
SEC(opens sec.gov)
Dec 234
Sacks Natalie0000899243-22-039327
SEC(opens sec.gov)
Feb 14
Sacks Natalie0001209191-22-005890
SEC(opens sec.gov)
Dec 214
Sacks Natalie0001209191-21-070823
SEC(opens sec.gov)
Nov 154
Sacks Natalie0001209191-21-064441
SEC(opens sec.gov)
May 74
Sacks Natalie0000899243-21-018765
SEC(opens sec.gov)
Jan 294
Sacks Natalie0001209191-21-006313
SEC(opens sec.gov)
May 204
Sacks Natalie0001209191-20-031019
SEC(opens sec.gov)
May 124
Sacks Natalie0000899243-20-012778
SEC(opens sec.gov)
May 54
Sacks Natalie0001209191-20-027143
SEC(opens sec.gov)
Apr 174
Sacks Natalie0001209191-20-024947
SEC(opens sec.gov)

Companies

Address

C/O CARIBOU BIOSCIENCES, INC. 2929 7TH STREET, SUITE 105

BERKELEY, CA, 94710