AI summary pending
View Full Filing (SEC EDGAR)Tandem Diabetes Care Inc
$16.45+2.1%
+$106.0M
Net Activity
+2.67% total shares
Institutions Holding
277
Popularity Rank
#2296
Avg Weight
0.08%
Total Value
$1.4B
Market Cap
$1.1B
277 institutions currently hold TNDM, with 147 net buyers and 138 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
138
Net Buying Institutions
147
Top 5 by Value
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Across its top 20 institutional holders, TNDM's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 8/100, avg. turnover score 46/100).
TNDM ranks #2296 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
277 institutions disclose a position in TNDM, but none treat it as a major bet — even Paradice Investment Management LLC, its most concentrated holder, allocates just 4.9% of its own portfolio to it.
Banque Pictet & Cie SA has trimmed its TNDM position for two straight quarters, cutting it by $801.7K while still holding $1.6M.
TNDM is up 2.1% today, and institutions have been net buyers of $106.0M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
TNDM reported a net loss of $63.3M over the trailing twelve months.
+$323.4M
Total Buy Value
$250.8M
Total Sell Value
147
Net Buyers
138
Net Sellers
TNDM
Q2 2026
Top 5 Institutional Movers
-$43.1M
-$39.9M
-$30.2M
-$29.5M
TNDM does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
2
Filings (90d)
$9K
Total Est. Value
491 shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| MARK NOVARA | 2026-09-17 | $6K |
| MARK NOVARA | 2026-08-18 | $3K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
0
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Voya Financial, Inc. | 13G/A | 2026-08-06 | 0.2% |
1
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)875372203, 875372104
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,610
Total reported value
$529.1B
Held by 4610 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,442
Total reported value
$354.7B
Held by 4442 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,353
Total reported value
$864.4B
Held by 4353 institutions — one of the most-tracked stocks on AlphaSMO
Access TNDM's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/TNDMCLI
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