Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
201 institutional managers reported holding ALKT for the quarter ended Mar 31, 2026. Together they hold about 95% of shares outstanding; the top 10 hold 56%. 34 opened new positions; 56 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| General Atlantic, L.p. (focused) | 15.34M | 14.70% | $240.7M | added +27.9% | 2021 Q2 |
| Vanguard Group | 8.53M | 8.17% | $133.8M | added +1.4% | 2021 Q2 |
| North Reef Capital Management LP | 7.65M | 7.33% | $120.1M | added +264.3% | 2024 Q2 |
| BlackRock | 5.89M | 5.64% | $92.4M | added +3.7% | 2021 Q2 |
| JANA Partners (focused) | 5.43M | 5.21% | $85.2M | added +11% | 2025 Q3 |
| Janus Henderson | 3.86M | 3.69% | $60.5M | added +20.2% | 2023 Q2 |
| UBS | 3.83M | 3.67% | $60.2M | added +158.6% | 2021 Q4 |
| Algebris (UK) LTD | 3.13M | 3.00% | $49.1M | added +153.5% | 2025 Q1 |
| Irenic Capital Management LP (focused) | 2.68M | 2.56% | $42.0M | added +27% | 2025 Q4 |
| Bamco INC /NY/ | 2.31M | 2.21% | $36.2M | trimmed -22.6% | 2021 Q2 |
| ArrowMark Colorado Holdings LLC | 2.23M | 2.14% | $35.0M | trimmed -14.5% | 2021 Q2 |
| Manufacturers Life Insurance Company, THE | 2.20M | 2.11% | $34.5M | added +16% | 2021 Q2 |
| Geode Capital | 1.84M | 1.76% | $28.9M | added +1.5% | 2021 Q2 |
| State Street | 1.84M | 1.76% | $28.8M | trimmed -1.1% | 2021 Q2 |
| Long Path Partners LP (focused) | 1.80M | 1.72% | $28.2M | trimmed -42.7% | 2022 Q2 |
| Champlain Investment Partners, LLC | 1.60M | 1.54% | $25.2M | trimmed -19.2% | 2024 Q4 |
| Citadel Advisors | 1.59M | 1.52% | $24.9M | added +746.6% | 2021 Q2 |
| Morgan Stanley | 1.47M | 1.40% | $23.0M | trimmed -15.7% | 2021 Q2 |
| FMR (Fidelity) | 1.46M | 1.40% | $22.9M | added +15.9% | 2021 Q2 |
| Praesidium Investment Management Company, LLC (focused) | 1.40M | 1.34% | $21.9M | trimmed -39% | 2025 Q1 |
| MFS Investment Management | 1.34M | 1.28% | $21.0M | trimmed -14.8% | 2021 Q2 |
| Cadian Capital Management, LP (focused) | 1.33M | 1.28% | $21.0M | added +14.2% | 2025 Q4 |
| Franklin Resources | 1.17M | 1.13% | $18.4M | trimmed -38.3% | 2021 Q2 |
| Gw&k Investment Management, LLC | 1.17M | 1.12% | $18.3M | unchanged | 2025 Q1 |
| Goldman Sachs | 1.15M | 1.10% | $18.1M | added +22% | 2021 Q2 |
| Bank OF America CORP /DE/ | 1.13M | 1.09% | $17.8M | added +5.7% | 2021 Q2 |
| Marshall Wace | 1.04M | 1.00% | $16.3M | added +502.8% | 2025 Q4 |
| Select Equity Group | 984.0k | 0.94% | $15.4M | added +10.3% | 2021 Q4 |
| Royal Bank OF Canada | 841.6k | 0.81% | $13.2M | trimmed -20.1% | 2021 Q2 |
| Riverbridge Partners LLC | 689.0k | 0.66% | $10.8M | trimmed -61.4% | 2024 Q2 |
| Northern Trust | 659.7k | 0.63% | $10.4M | trimmed -5.1% | 2021 Q2 |
| Charles Schwab Investment Management | 635.8k | 0.61% | $10.0M | unchanged | 2021 Q2 |
| Davidson Kempner | 564.0k | 0.54% | $8.9M | opened | 2026 Q1 |
| Herald Investment Management LTD | 500.0k | 0.48% | $7.8M | unchanged | 2022 Q1 |
| Millennium Management | 460.0k | 0.44% | $7.2M | trimmed -2.9% | 2022 Q1 |
| Clearline Capital LP | 455.1k | 0.44% | $7.1M | opened | 2026 Q1 |
| BNY Mellon | 431.0k | 0.41% | $6.8M | added +2.4% | 2021 Q2 |
| Deutsche Bank AG\ | 371.2k | 0.36% | $5.8M | trimmed -3.3% | 2021 Q2 |
| Citigroup INC | 352.7k | 0.34% | $5.5M | added +57.7% | 2021 Q2 |
| Nicholas Company, INC. | 346.6k | 0.33% | $5.4M | added +11% | 2025 Q2 |
| Hodges Capital Management INC. | 344.4k | 0.33% | $5.4M | added +22.4% | 2023 Q4 |
| Congress Asset Management CO | 340.7k | 0.33% | $5.3M | added +16.9% | 2025 Q2 |
| Sovereign's Capital Management, LLC | 326.8k | 0.31% | $5.1M | added +40.1% | 2024 Q4 |
| Quantinno Capital Management LP | 258.5k | 0.25% | $4.1M | added +2514.2% | 2025 Q3 |
| Granahan Investment Management, LLC | 252.9k | 0.24% | $4.0M | trimmed -4.7% | 2025 Q3 |
| Cibc World Market INC. | 217.2k | 0.21% | $3.4M | added +31.5% | 2025 Q1 |
| Nomura Asset Management International INC. | 189.9k | 0.18% | $3.0M | trimmed -38.6% | 2025 Q1 |
| Dimensional Fund Advisors | 187.5k | 0.18% | $2.9M | trimmed -5.7% | 2022 Q2 |
| Roubaix Capital, LLC (focused) | 161.1k | 0.15% | $2.5M | opened | 2026 Q1 |
| Advisory Research INC | 160.8k | 0.15% | $2.5M | added +24% | 2025 Q2 |
Largest 50 of 201 shown; the full ranked, searchable register is at boothcheck.com/holders/ALKT. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.