109 + Investors. Track Smart Money conviction in MASS. See who's accumulating, reducing, or initiating positions.
Based on 109 hedge funds · latest filing: 2026 Q1 · updated quarterly
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.
In 2026 Q1, 44 hedge funds were net buyers of MASS (12 opened a new position, 32 added to an existing one), while 64 reduced or exited (46 trimmed, 18 sold completely) — a 41% buyer ratio, indicating roughly balanced activity. Net fund flow last quarter: -6 funds (more exits than new entries). Total institutional holders: 109.
Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.
Signal Freshness measures how much MASS 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.
MASS outperformed XLV by +38.3% since March 31, 2026.
Since the filing became public, MASS outperformed XLV by +21.2% .
Interpretation: The stock has meaningfully outrun its sector. The trade has partially played out; entry is at a premium to the fund's implied reference. Learn more →
No strong consensus or elite conviction detected among institutional holders.
Track Smart Money conviction in MASS. See who's accumulating, reducing, or initiating positions.
| Metric | All 13F Filers (2026 Q1) | Prior (2025 Q4) | Change |
|---|---|---|---|
| Funds Holding | 109 | 115 | -5.22% |
| 13F Shares | 28M | 26M | 6.64% |
| Total Value | $169M | $137M | 23.15% |
| New Positions | 12 | 21 | -9 |
| Increased Positions | 31 | 40 | -9 |
| Closed Positions | 18 | 13 | +5 |
| Reduced Positions | 45 | 39 | +6 |
| Total Calls | 0 | 2 | -100.0% |
| Total Puts | 1 | 0 | 100% |
| PUT/CALL Ratio | 0.0 | 0.0 | Bullish |
| Market Cap | -- |
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| Price/Sales (ttm) | -- |
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| Enterprise Value/EBITDA | -- |
| Beta (5Y Monthly) | -- |
| Short Ratio (Days to Cover) | -- |
| Short % of Float | -- |
| Profit Margin | -- |
| Return on Assets (ttm) | -- |
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| Net Income Avi to Common (ttm) | -- |
| Diluted EPS (ttm) | -- |
| Total Cash (mrq) | -- |
| Total Debt/Equity (mrq) | -- |
| Levered Free Cash Flow (ttm) | -- |
Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in MASS. Verified SEC 13F-HR filings.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Selling streak — 1 quarter in a row: For 1 consecutive quarter, more hedge funds reduced or closed their MASS positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.
More sellers than buyers — 41% buying: Last quarter: 64 funds reduced or exited vs 44 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.
Smaller funds dominant — 14% AUM from top-100: 35 of 109 holders rank in the top 100 by AUM, but together hold only 14% of total institutional value. The stock is held primarily by smaller and mid-sized funds.
44% of holders stayed for 2+ years: 48 out of 109 hedge funds have held MASS 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.
As of today, MASS has moved +25.5% since the 2026 Q1 13F filing date (May 15, 2026), compared to +4.3% for the XLV sector ETF — an outperformance of +21.2%. Since the quarter end (March 31, 2026), MASS has gained +41.5% vs +3.2% for XLV. The stock has meaningfully outrun its sector. The trade has partially played out; entry is at a premium to the fund's implied reference.
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.