NELSEN ROBERT - Insider Trades & Share Buys/Sales

Real time insider trading transaction history:

Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
Shares are not adjusted for stock split.

"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Insider Trading Transactions for NELSEN ROBERT

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Common stock purchase or sale:

Transaction Date	Reported DateTime	Company	Symbol	Insider Relationship	Shares Traded	Average Price	Total Amount	Shares Owned	Filing
2026-06-22 Purchase	2026-06-24 4:18 pm	Kardigan Inc.	KARD	ARCH Venture Partners XIII LLC ARCH Venture Partners XIII L.P. ARCH Venture Fund XIII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN Director 10% Owner	1,250,000	$16	$20,000,000	15,042,035 (Indirect)	View
2026-05-04 Purchase	2026-05-04 6:02 pm	Seaport Therapeutics Inc.	SPTX	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN 10% Owner	1,100,000	$18	$19,800,000	6,294,951 (Indirect)	View
2026-03-06 Purchase	2026-03-09 4:34 pm	Lyell Immunopharma Inc.	LYEL	ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN BERNS PAUL L BYBEE CLINTON 10% Owner	488,090	$25.61	$12,499,985	3,247,162 (Indirect)	View
2025-11-13 Sale	2025-11-14 6:34 pm	Metsera Inc.	MTSR	ARCH Venture Partners XII LLC ARCH Venture Fund XII L.P. ARCH Venture Partners XII L.P. ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT Director 10% Owner	26,816,808	$0	$0	0 (Indirect)	View
2025-10-27 Purchase	2025-10-29 7:21 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT BYBEE CLINTON 10% Owner	1,915,700	$2.61	$4,999,977	33,847,838 (Indirect)	View
2025-08-01 Purchase	2025-08-01 7:19 pm	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	3,030,300	$3.3	$9,999,990	18,502,974 (Indirect)	View
2025-02-03 Purchase	2025-02-03 7:01 pm	Metsera Inc.	MTSR	ARCH Venture Partners XII LLC ARCH Venture Fund XII L.P. ARCH Venture Partners XII L.P. ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	2,222,222	$18	$39,999,996	8,313,680 (Indirect)	View
2024-04-02 Purchase	2024-04-04 4:30 pm	Boundless Bio Inc.	BOLD	CRANDELL KEITH BYBEE CLINTON NELSEN ROBERT GILLIS STEVEN 10% Owner	200,000	$16	$3,200,000	1,181,766 (Indirect)	View
2024-02-15 Purchase	2024-02-20 5:41 pm	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	3,200,000	$6.25	$20,000,000	15,472,674 (Indirect)	View
2024-02-08 Purchase	2024-02-12 5:46 pm	Sana Biotechnology Inc.	SANA	NELSEN ROBERT Director 10% Owner	1,818,181	$5.5	$9,999,996	22,761,125 (Indirect Direct)	View
2023-11-13 Purchase	2023-11-15 6:54 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	35,010	$11.77	$412,140	4,131,207 (Indirect)	View
2023-11-08 Purchase	2023-11-13 7:00 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	140,605	$10.98	$1,543,563	4,096,197 (Indirect)	View
2023-11-03 Purchase	2023-11-07 6:59 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	95,694	$11.49	$1,099,945	3,955,592 (Indirect)	View
2023-09-28 Purchase	2023-09-29 6:53 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	76,511	$13.68	$1,046,848	3,859,898 (Indirect)	View
2023-09-26 Purchase	2023-09-27 8:18 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	58,504	$11.97	$700,464	3,783,387 (Indirect)	View
2023-09-22 Purchase	2023-09-25 9:38 pm	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	100,740	$11.19	$1,127,064	3,724,883 (Indirect)	View
2023-09-19 Purchase	2023-09-20 06:16 am	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners X LLC ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT BYBEE CLINTON 10% Owner	1,500,000	$17	$25,500,000	3,624,143 (Indirect)	View

Stock options: Exercise, Award, Grant, Conversion

Transaction Date	Reported DateTime	Exercisable Expiration	Company	Symnbol	Insider Relationship	Shares Traded	Conversion Price	Shares Owned	Filing
2026-06-17 Conversion	2026-06-22 7:39 pm	N/A N/A	Kardigan Inc.	KARD	ARCH Venture Partners XIII LLC ARCH Venture Partners XIII L.P. ARCH Venture Fund XIII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN Director 10% Owner	22,451,023	$0	13,792,035 (Indirect)	View
Ownership	2026-06-18 06:15 am	N/A N/A	Kardigan Inc.	KARD	ARCH Venture Partners XIII LLC ARCH Venture Partners XIII L.P. ARCH Venture Fund XIII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN Director 10% Owner	0	$0	14,668,075 (Indirect)	View
2026-06-05 Option Award	2026-06-08 4:19 pm	N/A 2036-06-05	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	75,000	$0	75,000 (Direct)	View
2026-06-04 Option Award	2026-06-05 4:25 pm	N/A 2036-06-03	Sana Biotechnology Inc.	SANA	NELSEN ROBERT Director 10% Owner	90,000	$0	90,000 (Direct)	View
2026-05-04 Conversion	2026-05-04 6:02 pm	N/A N/A	Seaport Therapeutics Inc.	SPTX	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN 10% Owner	5,194,951	$0	6,294,951 (Indirect)	View
Ownership	2026-04-30 8:09 pm	N/A N/A	Seaport Therapeutics Inc.	SPTX	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN 10% Owner	0	$0	5,194,951 (Indirect)	View
2025-08-01 Option Award	2025-08-05 8:43 pm	N/A 2033-06-14	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	84,062	$0	84,062 (Direct)	View
Ownership	2025-07-29 9:23 pm	N/A N/A	Lyell Immunopharma Inc.	LYEL	ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN BERNS PAUL L 10% Owner	0	$0	938,438 (Indirect)	View
2025-06-05 Option Award	2025-06-09 4:39 pm	N/A 2035-06-04	Sana Biotechnology Inc.	SANA	NELSEN ROBERT Director 10% Owner	80,000	$0	80,000 (Direct)	View
2025-06-04 Option Award	2025-06-05 6:13 pm	N/A 2035-06-04	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	55,000	$0	55,000 (Direct)	View
2025-02-03 Conversion	2025-02-03 7:01 pm	N/A N/A	Metsera Inc.	MTSR	ARCH Venture Partners XII LLC ARCH Venture Fund XII L.P. ARCH Venture Partners XII L.P. ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	78,821,106	$0	8,313,680 (Indirect)	View
Ownership	2025-01-30 9:25 pm	N/A N/A	Metsera Inc.	MTSR	ARCH Venture Partners XII LLC ARCH Venture Fund XII L.P. ARCH Venture Partners XII L.P. ARCH Venture Fund XIII L.P. ARCH Venture Partners XIII L.P. ARCH Venture Partners XIII LLC CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT 10% Owner	0	$0	24,594,586 (Indirect)	View
Ownership	2025-01-30 4:42 pm	N/A N/A	Maze Therapeutics Inc.	MAZE	ARCH Venture Partners X LLC ARCH Venture Partners X L.P. ARCH Venture Partners X Overage L.P. ARCH Venture Fund X L.P. ARCH Venture Fund X Overage L.P. NELSEN ROBERT CRANDELL KEITH Burow Kristina GILLIS STEVEN 10% Owner	0	$0	37,588,634 (Indirect)	View
2024-06-06 Option Award(A)	2024-07-15 4:12 pm	N/A 2034-06-05	Sana Biotechnology Inc.	SANA	NELSEN ROBERT Director 10% Owner	65,000	$0	65,000 (Direct)	View
2024-06-14 Option Award	2024-06-17 4:41 pm	N/A 2034-06-13	Lyell Immunopharma Inc.	LYEL	NELSEN ROBERT Director 10% Owner	130,000	$0	36,542,716 (Direct)	View
2024-06-12 Option Award	2024-06-14 4:59 pm	N/A 2034-06-12	Prime Medicine Inc.	PRME	NELSEN ROBERT Director 10% Owner	45,000	$0	45,000 (Direct)	View
2024-06-10 Conversion	2024-06-10 7:46 pm	N/A N/A	Rapport Therapeutics Inc.	RAPP	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN 10% Owner	35,652,876	$0	3,728,738 (Indirect)	View
2024-06-06 Option Award	2024-06-07 4:22 pm	N/A 2034-06-05	Sana Biotechnology Inc.	SANA	NELSEN ROBERT Director 10% Owner	54,278	$0	54,278 (Direct)	View
Ownership	2024-06-06 7:14 pm	N/A N/A	Rapport Therapeutics Inc.	RAPP	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH NELSEN ROBERT Burow Kristina GILLIS STEVEN 10% Owner	0	$0	3,728,738 (Indirect)	View
2024-05-30 Option Award	2024-06-03 12:14 pm	2025-05-30 2034-05-29	Vir Biotechnology Inc.	VIR	NELSEN ROBERT Director	24,000	$0	13,550,704 (Direct)	View
2024-04-02 Conversion	2024-04-04 4:30 pm	N/A N/A	Boundless Bio Inc.	BOLD	CRANDELL KEITH BYBEE CLINTON NELSEN ROBERT GILLIS STEVEN 10% Owner	4,851,442	$0	1,181,766 (Indirect)	View
Ownership	2024-03-27 7:56 pm	N/A N/A	Boundless Bio Inc.	BOLD	CRANDELL KEITH BYBEE CLINTON NELSEN ROBERT GILLIS STEVEN 10% Owner	0	$0	2,494,095 (Indirect)	View
2023-12-08 Other	2023-12-12 7:53 pm	N/A N/A	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT BYBEE CLINTON 10% Owner	1,879,654	$0	32,424,564 (Indirect)	View
2023-09-19 Conversion	2023-09-20 06:16 am	N/A N/A	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners X LLC ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT BYBEE CLINTON 10% Owner	17,424,704	$0	3,624,143 (Indirect)	View
Ownership	2023-09-14 9:29 pm	N/A N/A	Neumora Therapeutics Inc.	NMRA	ARCH Venture Partners X LLC ARCH Venture Partners XII LLC ARCH Venture Partners XII L.P. ARCH Venture Fund XII L.P. CRANDELL KEITH GILLIS STEVEN NELSEN ROBERT BYBEE CLINTON 10% Owner	0	$0	28,045,420 (Indirect)	View
2023-09-08 Option Award	2023-09-08 4:24 pm	N/A 2033-09-07	Lyell Immunopharma Inc.	LYEL	NELSEN ROBERT Director 10% Owner	55,000	$0	36,467,716 (Direct)	View

(A) Indicate amendment filing.

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NELSEN ROBERT - Insider Trading & Ownership