Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

TANDEM DIABETES CARE INC (TNDM)

271 + Investors. Track Smart Money conviction in TNDM. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↑ +8
Streak
2Q ▲
Buyers last Q
51%

Smart Money Signals — TNDM

Based on 272 hedge funds · latest filing: 2026 Q1 · updated quarterly

📈

Buying streak — 2 quarters in a row

last 6Q
For 2 consecutive quarters, more hedge funds added TNDM than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
📊

High ownership — 83% of 3.0Y peak

83% of all-time peak
272 funds currently hold this stock — 83% of the 3.0-year high of 328 funds (reached 2024 Q3). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.
〰️

Stable — ownership unchanged year-over-year

fund count last 6Q
The number of hedge funds holding TNDM is almost the same as a year ago (-2 funds, -1% change). No significant rush to buy or sell — institutional backing is holding steady.
🟡

Slight buying edge — 51% buying

141 buying134 selling
Last quarter: 141 funds bought or added vs 134 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.
⚠️

Fewer new buyers each quarter (-8 vs last Q)

new funds entering per quarter
Funds opening this position for the first time: 38 → 43 → 54 → 46. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.
🔒

66% of holders stayed for 2+ years

■ 66% conviction (2yr+) ■ 18% medium ■ 16% new
179 out of 272 hedge funds have held TNDM for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
💎

Buying through price weakness — shares +9%, value -9%

Value
-8%
Shares
+8%
Last quarter: funds added +9% more shares while total portfolio value only changed -9%. Institutions were buying while the price was falling — a high-conviction accumulation signal. They're deliberately loading up on the dip.
📈

Growing discovery — still being found

39 → 38 → 43 → 54 → 46 new funds/Q
New funds entering each quarter: 38 → 43 → 54 → 46. A growing number of institutions are discovering TNDM each quarter. The narrative is still spreading — leaving room for ongoing capital accumulation.
🏛️

Deep conviction — 72% of holders stayed 2+ years

■ 72% veterans ■ 11% 1-2yr ■ 17% new
Of 282 current holders: 203 (72%) have held for over 2 years without selling. These are not momentum buyers — they have lived through drawdowns and stayed. A large veteran base acts as a stabilizing force during selloffs.
✅

Strong quality — 37% AUM from major funds

37% from top-100 AUM funds
52 of 272 holders rank in the top 100 by AUM, accounting for 37% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.
2.6
out of 10
Low Exit Risk
Exit risk score 2.6/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — TNDM

In 2026 Q1, 141 hedge funds were net buyers of TNDM (46 opened a new position, 95 added to an existing one), while 134 reduced or exited (96 trimmed, 38 sold completely) — a 51% buyer ratio, indicating a slight buying edge. Net buying has persisted for two consecutive quarters, a positive momentum signal. 37% of total institutional value in TNDM is held by top-100 AUM funds, reflecting strong institutional quality. Net fund flow last quarter: +8 funds (more new holders than closures). Total institutional holders: 272.

Hedge Fund Ownership: TNDM

How many hedge funds hold TNDM — quarterly history vs. share price
Quarterly hedge fund ownership of TNDM vs. share price

Market Analysis: TNDM

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: TNDM

-- --

Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Is It Too Late to Buy TANDEM DIABETES CARE INC (TNDM) Based on Hedge Fund 13F Filings?

Signal Freshness measures how much TNDM has moved relative to its sector benchmark (XLV) since the 2026 Q1 13F filing. A stock that has barely outrun its sector is still a relatively fresh entry point — the fund's thesis has not yet been priced in by the broader market.

Since Quarter End March 31, 2026 · 71d ago
TNDM
-4.0%
XLV
+4.1%

TNDM outperformed XLV by -8.1% since March 31, 2026.

Since 13F Filing Date May 15, 2026 · 26d ago
TNDM
+37.4%
XLV
+5.2%

Since the filing became public, TNDM outperformed XLV by +32.2% .

Interpretation: The stock has significantly outperformed its sector benchmark — the original entry opportunity has largely been captured by earlier investors. Learn more →

Smart Money Signal ?
Limited Smart Money Interest

No strong consensus or elite conviction detected among institutional holders.

24 top-rated funds 0 high-conviction
Consensus
6.1
/ 10
breadth
×
Elite
1.4
/ 10
conviction
Hedge Fund Positioning: TNDM
271 + Investors

Track Smart Money conviction in TNDM. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2026 Q1) Prior (2025 Q4) Change
Funds Holding 271 264 2.65%
13F Shares 85M 78M 8.93%
Total Value $1.57B $1.71B -8.65%
New Positions 45 54 -9
Increased Positions 90 85 +5
Closed Positions 38 40 -2
Reduced Positions 94 95 -1
Total Calls 6 7 -14.29%
Total Puts 6 8 -25.0%
PUT/CALL Ratio 1.0 1.14 Neutral

Statistics: TNDM

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Short Ratio (Days to Cover) --
Short % of Float --

Financial Highlights

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Total Cash (mrq) --
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Institutional Holders (2026 Q1)

271 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in TNDM. Verified SEC 13F-HR filings.

QUARTER:
Top 25 institutional holders of TNDM — 2026 Q1 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Paradice Investment Management LLC 7.35% 2,042,425 $39.2M
2 BEACONLIGHT CAPITAL, LLC 2.56% 253,877 $4.9M
3 First Light Asset Management, LLC 2.26% 1,314,715 $25.2M
4 Defilade Capital Management, L.P. 2.05% 761,905 $14.6M
5 Sessa Capital IM, L.P. 1.65% 4,730,757 $90.7M
6 ArrowMark Colorado Holdings LLC 1.58% 3,103,609 $59.5M
7 DAFNA Capital Management LLC 1.55% 355,208 $6.8M
8 SECTOR GAMMA AS 1.21% 267,091 $5.1M
9 Lisanti Capital Growth, LLC 0.80% 165,325 $3.2M
10 Nierenberg Investment Management Company, LLC 0.76% 79,510 $1.5M
11 FORMULA GROWTH LTD 0.61% 70,828 $1.4M
12 Soleus Capital Management, L.P. 0.61% 783,000 $15.0M
13 GW&K Investment Management, LLC 0.45% 2,689,106 $52K
14 DRIEHAUS CAPITAL MANAGEMENT LLC 0.32% 2,304,414 $44.2M
15 HighMark Wealth Management LLC 0.27% 34,120 $654K
16 VARCOV Co. 0.19% 26,562 $509K
17 Freestone Grove Partners LP 0.18% 1,330,742 $25.5M
18 Bayforest Capital Ltd 0.16% 7,265 $139K
19 ROYCE & ASSOCIATES LP 0.13% 696,590 $13.4M
20 JACOBS LEVY EQUITY MANAGEMENT, INC 0.12% 1,523,946 $29.2M
21 PDT Partners, LLC 0.11% 93,805 $1.8M
22 TWINBEECH CAPITAL LP 0.10% 51,366 $985K
23 ExodusPoint Capital Management, LP 0.10% 632,899 $12.1M
24 Legato Capital Management LLC 0.09% 50,085 $960K
25 Dynamic Technology Lab Private Ltd 0.09% 27,886 $535K
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — TANDEM DIABETES CARE INC (TNDM)

What does the Smart Money Trend signal show for TNDM?

Buying streak — 2 quarters in a row: For 2 consecutive quarters, more hedge funds added TNDM than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.

What is the institutional breadth score for TNDM?

Slight buying edge — 51% buying: Last quarter: 141 funds bought or added vs 134 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.

What is the fund quality score for TNDM holders?

Strong quality — 37% AUM from major funds: 52 of 272 holders rank in the top 100 by AUM, accounting for 37% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.

How long have hedge funds held TNDM?

66% of holders stayed for 2+ years: 179 out of 272 hedge funds have held TNDM for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Is it too late to buy TANDEM DIABETES CARE INC (TNDM) following the 2026 Q1 hedge fund 13F filings?

As of today, TNDM has moved +37.4% since the 2026 Q1 13F filing date (May 15, 2026), compared to +5.2% for the XLV sector ETF — an outperformance of +32.2%. Since the quarter end (March 31, 2026), TNDM has gained -4.0% vs +4.1% for XLV. The stock has significantly outperformed its sector benchmark — the original entry opportunity has largely been captured by earlier investors.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.

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