Altair Engineering Inc. Class AALTR
13F holders, Q4 2024 (December 31)298holders +46
81new positions
43sold out
8famous investors
$109.09avg. 13F price*
At the end of Q4 2024, 298 institutions reported holding Altair Engineering Inc. Class A (ALTR) in their 13F filings, up 46 from Q3 2024. 81 opened new positions and 43 sold out. The largest holders were Matrix Capital Management Company, LP ($1.4B), BlackRock, Inc. ($816.0M) and Vanguard Group Inc. ($752.2M). 8 famous investors held it, including Paul Tudor Jones (0.4% of Tudor Investment Corporation's portfolio), Ron Baron (0.2% of Baron Capital (BAMCO)'s portfolio) and Israel Englander (0.1% of Millennium Management's portfolio).
- Company
- Altair Engineering Inc. Class A
- CUSIP
- 021369103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 81 | $1.1B |
| Exits | 43 | $560.3M |
All 13F filers, Q3 2024 → Q4 2024: 13,242,815 shares bought and 16,549,462 shares sold, net −3,306,647 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 298 holders
| Matrix Capital Management Company, LP | 63.04% | No change | 12,430,000 | $1.4B |
| BlackRock, Inc. | 0.02% | Reduce -7.0% | 7,478,856 | $816.0M |
| Vanguard Group Inc. | 0.01% | Add +4.8% | 6,894,230 | $752.2M |
| HBK Investments L P | 7.04% | New | 2,779,518 | $303.3M |
| State Street Corp. | 0.01% | Add +3.3% | 2,122,319 | $231.6M |
| Geode Capital Management, LLC | 0.01% | Reduce -2.1% | 1,394,124 | $152.1M |
| Impax Asset Management Group plc | 0.59% | Reduce -12.1% | 1,196,098 | $129.5M |
| Conestoga Capital Advisors, LLC | 1.61% | Reduce -55.9% | 1,112,548 | $121.4M |
| Alliancebernstein L.P. | 0.04% | Reduce -16.1% | 1,066,016 | $116.3M |
| Goldman Sachs Group Inc. | 0.02% | Add +164.7% | 909,907 | $99.3M |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 2.52% | New | 897,580 | $97.9M |
| Northern Trust Corp. | 0.01% | Add +9.2% | 751,191 | $82.0M |
| Candriam S.C.A. | 0.39% | Reduce -12.3% | 614,335 | $67.0M |
| Dimensional Fund Advisors LP | 0.02% | Add +2.2% | 591,573 | $64.5M |
| Magnetar Financial LLC | 1.69% | New | 569,534 | $62.1M |
| Aberdeen Group plc | 0.12% | No change | 566,936 | $61.9M |
| JPMorgan Chase & Co. | 0.00% | Add +311.4% | 566,791 | $61.8M |
| Millennium Management | 0.05% | New | 560,612 | $61.2M |
| Morgan Stanley | 0.00% | Reduce -20.7% | 547,863 | $59.8M |
| Baron Capital (BAMCO) | 0.15% | Reduce -57.2% | 539,002 | $58.8M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +0.2% | 506,579 | $55.3M |
| AQR Arbitrage LLC | 2.25% | New | 487,904 | $53.2M |
| Bank of New York Mellon Corp | 0.01% | Reduce -10.4% | 421,883 | $46.0M |
| Man Group plc | 0.13% | New | 393,713 | $43.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +201.0% | 381,061 | $41.6M |
| Royal Bank of Canada | 0.01% | Reduce -12.2% | 364,814 | $39.8M |
| Norges Bank | 0.01% | Add +492.9% | 347,348 | $37.9M |
| Thematics Asset Management | 1.63% | Reduce -9.1% | 341,939 | $37.3M |
| Schonfeld Strategic Advisors LLC | 0.23% | Add +13097.8% | 331,528 | $36.2M |
| Franklin Resources Inc. | 0.01% | Reduce -22.7% | 330,957 | $36.1M |
| Tudor Investment Corporation | 0.37% | New | 316,994 | $34.6M |
| Woodline Partners LP | 0.22% | New | 299,998 | $32.7M |
| Farallon Capital Management, L.L.C. | 0.16% | New | 282,000 | $30.8M |
| Primecap Management Co. | 0.02% | Reduce -26.1% | 238,363 | $26.0M |
| Needham Investment Management LLC | 1.89% | Reduce -2.8% | 225,000 | $24.5M |
| Canada Pension Plan Investment Board | 0.02% | New | 222,600 | $24.3M |
| TIG Advisors, LLC | 1.86% | New | 220,467 | $24.1M |
| California Public Employees Retirement System | 0.02% | Add +135.9% | 220,435 | $24.1M |
| Westchester Capital Management, LLC | 1.36% | New | 210,020 | $22.9M |
| Ameriprise Financial Inc. | 0.01% | Reduce -70.5% | 203,035 | $22.2M |
| Hudson Bay Capital Management LP | 0.16% | New | 202,091 | $22.1M |
| State of Wisconsin Investment Board | 0.06% | Add +97.4% | 197,530 | $21.6M |
| Davidson Kempner Capital Management LP | 0.56% | New | 192,694 | $21.0M |
| UBS Group AG | 0.00% | Add +460.1% | 192,502 | $21.0M |
| HSBC Holdings PLC | 0.01% | New | 180,621 | $19.7M |
| Rhumbline Advisers | 0.02% | Add +1.1% | 178,626 | $19.5M |
| Slotnik Capital, LLC | 8.84% | New | 177,629 | $19.4M |
| LMR Partners LLP | 0.43% | New | 171,713 | $18.7M |
| Nuveen Asset Management, LLC | 0.01% | Add +4.3% | 169,113 | $18.5M |
| Principal Financial Group Inc. | 0.01% | Add +1.7% | 168,665 | $18.4M |
| Comerica Bank | 0.07% | Reduce -18.4% | 163,222 | $17.8M |
| King Luther Capital Management Corp. | 0.08% | Reduce -9.3% | 158,402 | $17.3M |
| Barclays PLC | 0.01% | Add +42.6% | 149,483 | $16.3M |
| Water Island Capital LLC | 2.07% | New | 144,509 | $15.8M |
| One68 Global Capital, LLC | 8.17% | — | 140,043 | $15.3M |
| Swiss National Bank | 0.01% | Add +5.1% | 116,900 | $12.8M |
| Bank of America Corp. | 0.00% | Reduce -27.8% | 113,823 | $12.4M |
| FIL Ltd | 0.01% | New | 113,000 | $12.3M |
| Adage Capital Partners Gp, L.L.C. | 0.02% | New | 100,659 | $11.0M |
| Legal & General Group Plc | 0.00% | Add +4.3% | 95,743 | $10.4M |
| Corebridge Financial, Inc. | 0.06% | Reduce -6.2% | 94,231 | $10.3M |
| GMO | 0.03% | New | 92,434 | $10.1M |
| Citigroup Inc. | 0.01% | Add +81.0% | 91,460 | $10.0M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.02% | Add +540.9% | 91,000 | $9.9M |
| Marshall Wace, LLP | 0.01% | Add +3950.5% | 89,273 | $9.7M |
| Invesco Ltd. | 0.00% | Reduce -93.8% | 87,830 | $9.6M |
| Voya Investment Management LLC | 0.01% | Add +12.4% | 87,089 | $9.5M |
| Nicholas Company, Inc. | 0.15% | No change | 85,960 | $9.4M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -4.8% | 80,956 | $8.8M |
| Stephens Investment Management Group LLC | 0.11% | Reduce -79.6% | 76,735 | $8.4M |
| New York Life Investment Management LLC | 0.08% | Add +1103.3% | 76,363 | $8.3M |
| Squarepoint Ops LLC | 0.02% | Add +32.5% | 75,779 | $8.3M |
| Mercer Global Advisors Inc. | 0.02% | New | 72,945 | $8.0M |
| Retirement Systems of Alabama | 0.03% | Add +0.7% | 72,685 | $7.9M |
| Bank of Montreal | 0.00% | Add +466.2% | 70,047 | $7.6M |
| Pentwater Capital Management LP | 0.13% | New | 69,362 | $7.6M |
| Susquehanna International Group, LLP | 0.01% | Add +816.5% | 68,262 | $7.4M |
| Lighthouse Investment Partners, LLC | 0.28% | Add +539.6% | 67,162 | $7.3M |
| Manufacturers Life Insurance Company, The | 0.01% | Reduce -3.2% | 66,964 | $7.3M |
| Homestead Advisers Corp | 0.18% | Reduce -10.1% | 66,877 | $7.3M |
| MetLife Investment Management, LLC | 0.04% | Add +5.4% | 65,227 | $7.1M |
| ClearAlpha Technologies LP | 6.09% | New | 64,987 | $7.1M |
| WINTON GROUP Ltd | 0.47% | New | 64,851 | $7.1M |
| Mutual of America Capital Management LLC | 0.07% | Reduce -0.9% | 64,020 | $7.0M |
| Sit Investment Associates Inc. | 0.16% | No change | 63,543 | $6.9M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.04% | Add +382.5% | 63,202 | $6.9M |
| Versor Investments LP | 1.12% | Add +1069.9% | 59,655 | $6.5M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.02% | New | 55,955 | $6.1M |
| Federated Hermes, Inc. | 0.01% | Reduce -86.9% | 55,253 | $6.0M |
| California State Teachers Retirement System | 0.01% | Add +2.5% | 55,226 | $6.0M |
| Raymond James Financial Inc. | 0.00% | — | 53,994 | $5.9M |
| Anson Funds Management LP | 0.69% | New | 50,085 | $5.5M |
| Polar Asset Management Partners Inc. | 0.11% | New | 50,000 | $5.5M |
| Calamos Advisors LLC | 0.04% | New | 49,773 | $5.4M |
| CANADA LIFE ASSURANCE Co | 0.01% | Add +4.0% | 46,350 | $5.1M |
| Vestcor Inc | 0.17% | New | 46,046 | $5.0M |
| Deutsche Bank AG | 0.00% | Add +33.8% | 45,648 | $5.0M |
| Voloridge Investment Management, LLC | 0.02% | New | 41,974 | $4.6M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.01% | Add +19.5% | 39,020 | $4.3M |
| Natixis | 0.03% | New | 38,024 | $4.1M |
"% of holder's portfolio" is ALTR's weight in each manager's 13F, not the share of Altair Engineering Inc. Class A the manager owns.