Nierenberg Investment Management Company, LLC
Position in TNDM — Tandem Diabetes Care Inc
CIK 1282683
Camas, WA
Position in TNDM
as of Jun 30, 2026
· filed Aug 11, 2026
Position Value
$2,397,951
+$873,745 QoQ
Shares Held
158,910
+99.9% QoQ
Ownership
0.228%
of shares outstanding
% of Portfolio
1.55%
of 13F equity value
Holder Rank
#67
of 273 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 0%
Shared 100%
None 0%
Common Shares in TNDM Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Jun 30, 2026Nierenberg Investment Management Company, LLC holds $4,368,951 across 2 Medical Devices names. TNDM ranks #1 (54.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TNDM |
Tandem Diabetes Care Inc
This page
|
158,910 | $2,397,951 | |
| 2 | HAE |
Haemonetics Corp
|
26,280 | $1,971,000 |
All Filings in TNDM
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3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,397,951 | 158,910 | Shares | Sole | 2026-08-11 | |
| 2026-03-31 | $1,524,206 | 79,510 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $979,318 | 44,555 | Shares | Sole | 2026-02-13 | |
| No filing history on record for this holder in this stock. | ||||||