Citadel Advisors Llc

13F Holdings History for Cabaletta Bio, Inc. - Common Stock, par value $0.00001 per share (CABA)

Symbol: CABA on Nasdaq
Investment type: Equity / Common Stock, par value $0.00001 per share
Latest Disclosed Ownership: 3.15M shares
Security Ownership: 3.4%

Shares, Excluding Options vs Price

Value, Excluding Options

Kenneth Griffin ownership in Cabaletta Bio, Inc. Common Stock, par value $0.00001 per share (CABA)

2025-11-14 - Kenneth Griffin has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 3.15M shares of Cabaletta Bio, Inc. Common Stock, par value $0.00001 per share (CABA). This represents 3.4% percent ownership of the company. In their previous filing dated 2025-06-20, CITADEL ADVISORS LLC had reported owning 4.82M shares, indicating a decrease of -34.6% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
Kenneth Griffin	3.4%	-36%	$7.37M	3.15M	-1,668,285	-34.6%	$2.34	13G/A	9/30/2025	14 Nov 2025 16:09:49
Kenneth Griffin	5.2%		$9.01M	4.82M			$1.87	13G	6/12/2025	20 Jun 2025 17:22:59

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
9/30/2025		0%	0%	$1.65M	705K	-982,515	-58.2%	$2.34	Q3 2025
9/30/2025	call	0%	+0%	$573K	245K	+168,300	+220%	$2.34	Q3 2025
9/30/2025	put		0%	$0	0	-28,800	-100%		Q3 2025
6/30/2025		0%	+0%	$2.57M	1.69M	+1,687,630	+482180%	$1.52	Q2 2025
6/30/2025	call	0%	+0%	$116K	76.5K	+36,000	+88.9%	$1.52	Q2 2025
6/30/2025	put	0%	0%	$43.8K	28.8K	-105,500	-78.6%	$1.52	Q2 2025
3/31/2025		0%		$485	350	+350	NEW	$1.39	Q1 2025
3/31/2025	call	0%	0%	$56.1K	40.5K	-95,900		$1.39	Q1 2025
3/31/2025	put	0%	+0%	$186K	134K	+66,300		$1.39	Q1 2025
12/31/2024			0%	$0	0	-4,511	-100%		Q4 2024
12/31/2024	call	0%	+0%	$310K	136K	+121,900	+841%	$2.27	Q4 2024
12/31/2024	put	0%	+0%	$154K	68K	+30,100	+79.4%	$2.27	Q4 2024
9/30/2024		0%	0%	$21.3K	4.51K	-315,035	-98.6%	$4.72	Q3 2024
9/30/2024	call	0%	0%	$68.4K	14.5K	-4,400	-23.3%	$4.72	Q3 2024
9/30/2024	put	0%	+0%	$179K	37.9K	+15,700	+70.7%	$4.72	Q3 2024
6/30/2024		0%	+0%	$2.39M	320K	+317,305	+14159%	$7.48	Q2 2024
6/30/2024	call	0%	0%	$141K	18.9K	-55,100	-74.5%	$7.48	Q2 2024
6/30/2024	put	0%	+0%	$166K	22.2K	+5,200	+30.6%	$7.48	Q2 2024
3/31/2024		0%	0%	$38.2K	2.24K	-31,639	-93.4%	$17.06	Q1 2024
3/31/2024	call	0%	+0%	$1.26M	74K	+19,200	+35%	$17.06	Q1 2024
3/31/2024	put	0%	+0%	$290K	17K	+9,900	+139%	$17.06	Q1 2024
12/31/2023		0%	+0%	$769K	33.9K	+31,417	+1276%	$22.70	Q4 2023
12/31/2023	call	0%	+0%	$1.24M	54.8K	+45,600	+496%	$22.70	Q4 2023
12/31/2023	put	0%	0%	$161K	7.1K	-2,200	-23.7%	$22.70	Q4 2023
9/30/2023		0%	+0%	$37.5K	2.46K	+2,463	NEW	$15.22	Q3 2023
9/30/2023	call	0%	0%	$140K	9.2K	-3,100	-25.2%	$15.22	Q3 2023
9/30/2023	put	0%	+0%	$142K	9.3K	+1,600	+20.8%	$15.22	Q3 2023
6/30/2023			0%	$0	0	-21,197	-100%		Q2 2023
6/30/2023	call	0%	0%	$159K	12.3K	-9,200	-42.8%	$12.91	Q2 2023
6/30/2023	put	0%	0%	$99.4K	7.7K	-4,300	-35.8%	$12.91	Q2 2023
3/31/2023		0%	0%	$175K	21.2K	-51,981	-71%	$8.27	Q1 2023
3/31/2023	call	0%	0%	$178K	21.5K	-2,700	-11.2%	$8.27	Q1 2023
3/31/2023	put	0%	0%	$99.2K	12K	-5,600	-31.8%	$8.27	Q1 2023
12/31/2022		0%	+0%	$677K	73.2K	+73,178	NEW	$9.25	Q4 2022
12/31/2022	call	0%	0%	$224K	24.2K	-59,000	-70.9%	$9.25	Q4 2022
12/31/2022	put	0%	0%	$163K	17.6K	-300	-1.68%	$9.25	Q4 2022
9/30/2022			0%	$0	0	-1,254,479	-100%		Q3 2022
9/30/2022	call	0%	+0%	$54K	83.2K	+83,200	NEW	$0.65	Q3 2022
9/30/2022	put	0%	+0%	$12K	17.9K	+17,900	NEW	$0.67	Q3 2022
6/30/2022		0%	0%	$1.33M	1.25M	-220,621	-15%	$1.06	Q2 2022
3/31/2022		0%	0%	$2.99M	1.48M	-24,523	-1.64%	$2.03	Q1 2022
3/31/2022	call		0%	$0	0	-19,800	-100%		Q1 2022
3/31/2022	put		0%	$0	0	-44,100	-100%		Q1 2022
12/31/2021		0.01%	+0%	$5.68M	1.5M	+940,156	+168%	$3.79	Q4 2021
12/31/2021	call	0%	0%	$75K	19.8K	-36,700	-65%	$3.79	Q4 2021
12/31/2021	put	0%	+0%	$167K	44.1K	+44,100	NEW	$3.79	Q4 2021
9/30/2021		0.01%	+0.01%	$6.8M	559K	+522,135	+1399%	$12.16	Q3 2021
9/30/2021	call	0%	+0%	$687K	56.5K	+42,900	+315%	$12.16	Q3 2021
9/30/2021	put		0%	$0	0	-15,100	-100%		Q3 2021
6/30/2021		0%	+0%	$321K	37.3K	+18,481	+98%	$8.60	Q2 2021
6/30/2021	call	0%	+0%	$117K	13.6K	+13,600	NEW	$8.60	Q2 2021
6/30/2021	put	0%	+0%	$130K	15.1K	+15,100	NEW	$8.61	Q2 2021
3/31/2021		0%	+0%	$209K	18.9K	+8,042	+74.4%	$11.09	Q1 2021
12/31/2020		0%	+0%	$135K	10.8K	+10,809	NEW	$12.49	Q4 2020
6/30/2020			0%	$0	0	-16,312	-100%		Q2 2020
3/31/2020		0%	+0%	$119K	16.3K	+16,312	NEW	$7.30	Q1 2020

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.