ArrowMark Colorado Holdings LLC

Holdings History for TANDEM DIABETES CARE INC - Common Stock, par value $0.001 per share (TNDM)

Symbol: TNDM on Nasdaq
Investment type: Equity / Common Stock, par value $0.001 per share
Latest Disclosed Shares Owned: 2,889,691 shares
Security Ownership %: 4.3%

Shares, Excluding Options vs Price

Value, Excluding Options

ArrowMark Colorado Holdings, LLC ownership in TANDEM DIABETES CARE INC Common Stock, par value $0.001 per share (TNDM)

17 Feb 2026 - ArrowMark Colorado Holdings, LLC has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 2,889,691 shares of TANDEM DIABETES CARE INC Common Stock, par value $0.001 per share (TNDM). This represents 4.3% ownership of the company. In their previous filing dated 13 Nov 2025, ArrowMark Colorado Holdings LLC had reported owning 3,691,198 shares, indicating a decrease of +22%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
ArrowMark Colorado Holdings, LLC	4.3%	-24%	$62,272,841	2,889,691	-801,507	-22%	$21.55	13G/A	31 Dec 2025	17 Feb 2026, 16:37
ArrowMark Colorado Holdings, LLC	5.5%		$44,811,144	3,691,198			$12.14	13G	30 Sep 2025	13 Nov 2025, 09:01

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025	1.4%	-0.39%	$63,515,408	2,889,691	-801,507	-22%	$21.98	Q4 2025
30 Sep 2025	0.83%	+0.22%	$44,811,144	3,691,198	+991,649	+37%	$12.14	Q3 2025
30 Jun 2025	0.91%	-0.01%	$50,319,593	2,699,549	-16,783	-0.62%	$18.64	Q2 2025
31 Mar 2025	0.84%	-0%	$52,044,921	2,716,332	-7,383		$19.16	Q1 2025
31 Dec 2024	1.3%	+0.16%	$98,108,214	2,723,715	+337,026	+14%	$36.02	Q4 2024
30 Sep 2024	1.3%	-0.06%	$101,219,480	2,386,689	-118,162	-4.7%	$42.41	Q3 2024
30 Jun 2024	1.2%	-0.2%	$100,920,447	2,504,851	-429,328	-15%	$40.29	Q2 2024
31 Mar 2024	1.2%	-0%	$103,899,278	2,934,179	-824	-0.03%	$35.41	Q1 2024
31 Dec 2023	0.96%	+0.43%	$86,817,389	2,935,003	+1,303,459	+80%	$29.58	Q4 2023
30 Sep 2023	0.41%	+0.41%	$33,887,169	1,631,544	+1,631,544	NEW	$20.77	Q3 2023

* 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.