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TANDEM DIABETES (TNDM)
NASDAQ
$22.32$0.00 (0.00%)
Price as of Aug 21, 2026 7:30 PM EDT- $1.6BMarket Cap
- 87.09%1-Year Change
- Medical DevicesIndustry
TANDEM DIABETES (TNDM)
$22.32$0.00 (0.00%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BLACKROCK FUNDING, INC. /DE | 17.07% | 11.7M | +587,379 (+5.02%) | Dec 31, 2024 |
BLACKROCK, INC. | 16.90% | 11.6M | +892,281 (+7.70%) | Jun 30, 2026 |
BLACKROCK INC. | 16.23% | 11.1M | +1.9M (+17.00%) | Jun 30, 2024 |
VANGUARD GROUP INC | 10.71% | 7.3M | +278,042 (+3.79%) | Dec 31, 2025 |
UBS GROUP AG | 7.56% | 5.2M | 0 (0.00%) | Jun 30, 2026 |
SESSA CAPITAL IM, L.P. | 7.44% | 5.1M | +369,243 (+7.24%) | Jun 30, 2026 |
VANGUARD PORTFOLIO MANAGEMENT LLC | 6.27% | 4.3M | +306,334 (+7.12%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
Virtus Investment Trust | 19.65% | 13.5M | +13.5M (+100.00%) | Mar 31, 2026 |
Virtus Strategy Trust | 18.62% | 12.8M | +12.8M (+100.00%) | Mar 31, 2026 |
VANGUARD INDEX FUNDS | 7.83% | 5.4M | +104,043 (+1.94%) | Mar 31, 2026 |
Virtus Convertible & Income Fund | 4.87% | 3.3M | +3.3M (+100.00%) | Apr 30, 2026 |
Virtus Convertible & Income Fund II | 3.87% | 2.7M | +2.7M (+100.00%) | Apr 30, 2026 |
Virtus Dividend, Interest & Premium Strategy Fund | 3.87% | 2.7M | +2.7M (+100.00%) | Apr 30, 2026 |
Virtus Equity & Convertible Income Fund | 3.86% | 2.6M | +2.6M (+100.00%) | Apr 30, 2026 |
Current Ownership Distribution
- Institutions1.4B (64.97%)
- Mutual Funds735.2M (34.94%)
- Insiders1.8M (0.08%)
- Other0 (0.00%)
Insider Transactions
- 0.08% (1.8M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 1Number of InsiderSelling (last 12 months)
- $1.7MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Kyrillos Jean-Claude EVP & Chief Operating Officer | Exempt | Aug 15, 2026 | $0.00 | 1,010 | $0.00 | 7,067 |
Hansen Shannon Marie EVP & Chief Legal Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 3,290 |
Carpenter Rick EVP & Chief Technology Officer | Exempt | Aug 15, 2026 | $0.00 | 897 | $0.00 | 2,692 |
Hansen Shannon Marie EVP & Chief Legal Officer | Exempt | Aug 15, 2026 | $0.00 | 1,917 | $0.00 | 13,418 |
Kyrillos Jean-Claude EVP & Chief Operating Officer | Exempt | Aug 15, 2026 | $0.00 | 1,010 | $0.00 | 30,825 |
Hansen Shannon Marie EVP & Chief Legal Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 31,268 |
Morrison Susan EVP & Chief Admin. Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 3,290 |
Hansen Shannon Marie EVP & Chief Legal Officer | In Kind | Aug 15, 2026 | $12,700.48 | 559 | $22.72 | 30,709 |
Kyrillos Jean-Claude EVP & Chief Operating Officer | In Kind | Aug 15, 2026 | $12,155.20 | 535 | $22.72 | 30,290 |
Hansen Shannon Marie EVP & Chief Legal Officer | Exempt | Aug 15, 2026 | $0.00 | 1,917 | $0.00 | 32,626 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 3,290 |
Hansen Shannon Marie EVP & Chief Legal Officer | In Kind | Aug 15, 2026 | $22,174.72 | 976 | $22.72 | 31,650 |
Morrison Susan EVP & Chief Admin. Officer | Exempt | Aug 15, 2026 | $0.00 | 1,730 | $0.00 | 12,115 |
Carpenter Rick EVP & Chief Technology Officer | Exempt | Aug 15, 2026 | $0.00 | 1,610 | $0.00 | 11,268 |
Morrison Susan EVP & Chief Admin. Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 51,867 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | Exempt | Aug 15, 2026 | $0.00 | 1,917 | $0.00 | 13,418 |
Morrison Susan EVP & Chief Admin. Officer | In Kind | Aug 15, 2026 | $7,134.08 | 314 | $22.72 | 51,553 |
Carpenter Rick EVP & Chief Technology Officer | Exempt | Aug 15, 2026 | $0.00 | 897 | $0.00 | 31,815 |
Morrison Susan EVP & Chief Admin. Officer | Exempt | Aug 15, 2026 | $0.00 | 1,730 | $0.00 | 53,283 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | Exempt | Aug 15, 2026 | $0.00 | 1,097 | $0.00 | 1,097 |
Morrison Susan EVP & Chief Admin. Officer | In Kind | Aug 15, 2026 | $11,246.40 | 495 | $22.72 | 52,788 |
Carpenter Rick EVP & Chief Technology Officer | In Kind | Aug 15, 2026 | $10,383.04 | 457 | $22.72 | 31,358 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | In Kind | Aug 15, 2026 | $13,382.08 | 589 | $22.72 | 508 |
Carpenter Rick EVP & Chief Technology Officer | Exempt | Aug 15, 2026 | $0.00 | 1,610 | $0.00 | 32,968 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | Exempt | Aug 15, 2026 | $0.00 | 1,917 | $0.00 | 2,425 |
Carpenter Rick EVP & Chief Technology Officer | In Kind | Aug 15, 2026 | $18,630.40 | 820 | $22.72 | 32,148 |
Gasser Elizabeth Anne EVP, Chief Strategy Officer | In Kind | Aug 15, 2026 | $23,378.88 | 1,029 | $22.72 | 1,396 |
Kyrillos Jean-Claude EVP & Chief Operating Officer | Exempt | Jul 15, 2026 | $0.00 | 3,636 | $0.00 | 14,545 |
Kyrillos Jean-Claude EVP & Chief Operating Officer | Exempt | Jul 15, 2026 | $0.00 | 3,636 | $0.00 | 31,741 |
Kyrillos Jean-Claude EVP & Chief Operating Officer | In Kind | Jul 15, 2026 | $29,429.28 | 1,926 | $15.28 | 29,815 |