Form 13-F position report

TANDEM DIABETES CARE INC COM N

Reported by FRED ALGER MANAGEMENT LLC

Company profile Manager portfolio Source filing
TNDM CUSIP 875372203 Manager CIK 0000003520
Latest reported change

Reported 2,174,107 shares, up 677,036 (45.2%) from the prior quarter.

Reported value 65.2%; share count 45.2% vs. the prior quarter.

Added
% of reported 13F value 0.43% This manager · Q2 2024
Shares 2,174,107 Quarter-end amount reported
Reported value $87,594,771 Fair value at quarter end
Consecutive quarters held 26 Through Q2 2024

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

17 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q3 2025 Reduced 0 -667,345 (-100.0%) 0 $0 2025-11-14
Q2 2025 Reduced 667,345 -786,894 (-54.1%) 0.06% $12,439,310 2025-08-14
Q1 2025 Reduced 1,454,239 -489,117 (-25.2%) 0.16% $27,863,220 2025-05-16
Q4 2024 Reduced 1,943,356 -35,763 (-1.8%) 0.33% $69,999,683 2025-02-14
Q3 2024 Reduced 1,979,119 -194,988 (-9.0%) 0.41% $83,934,437 2024-11-14
Q2 2024 Added 2,174,107 +677,036 (45.2%) 0.43% $87,594,771 2024-08-14
Q1 2024 Added 1,497,071 +1,194,292 (394.4%) 0.26% $53,011,284 2024-05-15
Q4 2023 Reduced 302,779 -22,910 (-7.0%) 0.05% $8,956,203 2024-02-14
Q3 2023 Added 325,689 +110,049 (51.0%) 0.04% $6,764,560 2023-11-14
Q2 2023 Reduced 215,640 -8,768 (-3.9%) 0.03% $5,291,805 2023-08-14
Q1 2023 Added 224,408 +79,241 (54.6%) 0.05% $9,113,208 2023-05-15
Q4 2022 Reduced 145,167 -34,506 (-19.2%) 0.04% $6,525,257 2023-02-14
Q3 2022 Added 179,673 +34,583 (23.8%) 0.04% $8,597,000 2022-11-15
Q2 2022 Reduced 145,090 -3,522 (-2.4%) 0.04% $8,588,000 2022-08-15
Q1 2022 Reduced 148,612 -728 (-0.5%) 0.06% $17,282,000 2022-05-16
Q4 2021 Reduced 149,340 -4,894 (-3.2%) 0.06% $22,479,000 2022-02-14
Q3 2021 Reduced 154,234 -18,658 (-10.8%) 0.04% $18,412,000 2021-11-15
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Institutional context

Who else reported the position

348 managers reported TANDEM DIABETES CARE INC COM N for Q2 2024.

Manager Activity Shares Change % of reported 13F Reported value Tenure
BlackRock Inc Added 11,122,903 +1,890,422 0.01% $448,141,762 27 qtrs
VANGUARD GROUP INC Added 7,378,002 +325,432 < 0.01% $297,259,700 27 qtrs
Capital World Investors Unchanged 3,665,300 0 0.02% $147,674,937 17 qtrs
STATE STREET CORPORATION Added 2,572,564 +331,586 < 0.01% $103,648,604 26 qtrs
ArrowMark Colorado Holdings LLC Reduced 2,504,851 -429,328 1.2% $100,920,447 4 qtrs
FRED ALGER MANAGEMENT LLC This report Added 2,174,107 +677,036 0.43% $87,594,771 26 qtrs
JENNISON ASSOCIATES LLC Reduced 1,969,626 -586,498 0.05% $79,356,233 5 qtrs
CITADEL ADVISORS LLC Added 1,808,741 +1,241,673 0.01% $72,874,175 25 qtrs
Champlain Investment Partners LLC Added 1,629,527 +115,970 0.4% $65,653,643 14 qtrs
Bellevue Group AG Reduced 1,543,267 -488,621 1.01% $62,178,227 25 qtrs
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Filing details and methodology As reported
Report period
June 30, 2024
Filed
August 14, 2024
Filing type
13F-HR
Position type
Common

Voting authority reported

Sole
1,780,193
Shared
0
None
393,914

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.