50% buyers of institutions opening or closing positions this quarter
new buyers and exits are balanced, ownership rose 8.39 percentage points vs the prior quarter, and no widely-followed fund managers in the top 25.
50% buyers of institutions opening or closing positions this quarter
72.6% institutional ownership
L1 Global Manager portfolio allocation
Institutional ownership vs Shell Companies peers
No Form 4 insider transactions on file
Latest positioning in MACI across 13F flow, ownership shift, marquee holders, and holder-count growth.
Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MACI held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Polar Asset Management Partners Inc. | 1.5M | $16.0M | 0.0% | 6.868% | 0.32% |
| 2 | LMR Partners LLP | 1.5M | $16.0M | 0.0% | 6.868% | 0.04% |
| 3 | Vivaldi Asset Management, LLC | 1.4M | $15.1M | 0.0% | 6.475% | 0.79% |
| 4 | MIZUHO SECURITIES USA LLC | 1.3M | $13.4M | +21.8% | 5.785% | 0.32% |
| 5 | WOLVERINE ASSET MANAGEMENT LLC | 1.0M | $11.1M | -0.2% | 4.748% | 0.11% |
| 6 | BERKLEY W R CORP | 999K | $10.8M | +15.0% | 4.620% | 0.58% |
| 7 | CNH PARTNERS LLC | 996K | $10.8M | -0.1% | 4.609% | 0.18% |
| 8 | Karpus Management, Inc. | 989K | $10.6M | — | 4.572% | 0.33% |
| 9 | D. E. Shaw & Co., Inc. | 576K | $6.2M | 0.0% | 2.666% | 0.00% |
| 10 | Cable Car Capital, LP | 493K | $5.3M | 0.0% | 2.278% | 1.83% |
| 11 | Wealthspring Capital LLC | 448K | $4.8M | -1.7% | 2.072% | 1.15% |
| 12 | Radcliffe Capital Management, L.P. | 427K | $4.6M | 0.0% | 1.975% | 0.34% |
| 13 | Westchester Capital Management, LLC | 425K | $4.6M | 0.0% | 1.964% | 0.21% |
| 14 | Magnetar Financial LLC | 371K | $4.0M | 0.0% | 1.717% | 0.04% |
| 15 | Crossingbridge Advisors, LLC | 355K | $3.8M | +67.9% | 1.643% | 0.69% |
| 16 | L1 Global Manager Pty Ltd | 335K | $3.6M | 0.0% | 1.549% | 2.41% |
| 17 | Hudson Bay Capital Management LP | 325K | $3.5M | 0.0% | 1.503% | 0.01% |
| 18 | Alberta Investment Management Corp | 325K | $3.5M | 0.0% | 1.503% | 0.02% |
| 19 | PICTON MAHONEY ASSET MANAGEMENT | 325K | $3.5M | 0.0% | 1.503% | 0.03% |
| 20 | GOLDMAN SACHS GROUP INC | 299K | $3.2M | 0.0% | 1.384% | 0.00% |
| 21 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 299K | $3.2M | 0.0% | 1.383% | 0.16% |
| 22 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | 289K | $3.1M | — | 1.336% | 0.10% |
| 23 | JPMORGAN CHASE & CO | 289K | $3.1M | — | 1.336% | 0.10% |
| 24 | RiverPark Advisors, LLC | 225K | $2.4M | +20.8% | 1.042% | 0.88% |
| 25 | TORONTO DOMINION BANK | 184K | $2.0M | +37.9% | 0.849% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MACI — a direct measure of their conviction.
Filings activity in MACI during Q1 2026, grouped by how each filer changed its position.
7 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 37 | +0.0% | 72.60% | +8.39 pp | $173M | +13% |
| Q4 2025 | 37 | +0.0% | 64.21% | 0.79 pp | $153M | 1.2% |
| Q3 2025 | 37 | +0.0% | 65.00% | +2.37 pp | $155M | +3.8% |
| Q2 2025 | 37 | +5.7% | 62.63% | +4.97 pp | $149M | +8.6% |
| Q1 2025 | 35 | +2.9% | 57.66% | +3.42 pp | $137M | +6.3% |
| Q4 2024 | 34 | +9.7% | 54.24% | +8.81 pp | $129M | +19% |
| Q3 2024 | 31 | — | 45.43% | — | $108M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
No recent Form 4 insider transactions on file for MACI.
Quick answers to the most common questions about buying MACI stock.
Based on Q1 2026 13F filings, institutional ownership of Melar Acquisition Corp. I stands at 72.6%, held across 37 reporting institutions.
Polar Asset Management Partners Inc. is the largest reported institutional holder of MACI, with approximately 1,485,000 shares worth $0.02B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of MACI.
Our composite Smart Money Score for MACI is 47 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
3 institutions opened new positions in MACI during Q1 2026, while 3 fully exited. 30 added to existing positions and 4 trimmed.
MACI institutional ownership rose by 8.39 percentage points quarter-over-quarter, with a net change of +0 holders.
The top 10 institutions account for 66.7% of all reported 13F value in MACI, and the top 25 account for 97.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.