Vault-13

ALTAIR ENGR INC ALTR

COM CL A · Common Stock · CUSIP 021369103 · ISIN US0213691035

299 institutional holders +46 vs Q3 2024
57,434,00157.4m shares reported held*
$6.3bnreported value*
76 new 79 added 96 reduced 44 sold out net sold ≈ $830.4m (-7.6m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($1.9m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $109.09. Options: 15 managers hold calls ($19.3m notional), 8 hold puts ($44.9m).

Trends to Q4 2024

Institutional holders

Managers reporting a position, each quarter

0100200300Q3 22: 178Q4 22: 173Q1 23: 200Q2 23: 215Q3 23: 195Q4 23: 217Q1 24: 234Q2 24: 241Q3 24: 253Q4 24: 299299Q3 22Q1 23Q3 23Q1 24Q3 24Q4 24
Numbers
QuarterHolders
Q3 2022178
Q4 2022173
Q1 2023200
Q2 2023215
Q3 2023195
Q4 2023217
Q1 2024234
Q2 2024241
Q3 2024253
Q4 2024299

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
2000200Q1 23: 112 bought or addedQ1 23: 78 cut or sold outQ2 23: 107 bought or addedQ2 23: 96 cut or sold outQ2 23Q3 23: 95 bought or addedQ3 23: 100 cut or sold outQ4 23: 114 bought or addedQ4 23: 91 cut or sold outQ4 23Q1 24: 124 bought or addedQ1 24: 97 cut or sold outQ2 24: 151 bought or addedQ2 24: 108 cut or sold outQ2 24Q3 24: 135 bought or addedQ3 24: 94 cut or sold outQ4 24: 155 bought or addedQ4 24: 140 cut or sold outQ4 24
Numbers
QuarterBought or addedCut or sold out
Q1 202311278
Q2 202310796
Q3 202395100
Q4 202311491
Q1 202412497
Q2 2024151108
Q3 202413594
Q4 2024155140

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20m$40m$60mQ1 24 calls: $24.2mQ1 24 puts: $8.1mQ1 24P/C 0.34Q2 24 calls: $34.0mQ2 24 puts: $18.3mQ2 24P/C 0.54Q3 24 calls: $41.1mQ3 24 puts: $19.6mQ3 24P/C 0.48Q4 24 calls: $19.3mQ4 24 puts: $44.9mQ4 24P/C 2.33
Numbers
QuarterCallsPutsP/C
Q1 2024$24.2m$8.1m0.34
Q2 2024$34.0m$18.3m0.54
Q3 2024$41.1m$19.6m0.48
Q4 2024$19.3m$44.9m2.33

Biggest buyers

Magnetar Financial LLC New +569,534+569.5k
GOLDMAN SACHS GROUP INC Added +566,105+566.1k
MILLENNIUM MANAGEMENT LLC New +560,612+560.6k
AQR Arbitrage LLC New +487,904+487.9k
Man Group plc New +393,713+393.7k
Schonfeld Strategic Advisors LLC Added +329,016+329.0k
VANGUARD GROUP INC Added +317,575+317.6k
TUDOR INVESTMENT CORP ET AL New +316,994+317.0k
Woodline Partners LP New +299,998+300.0k
JPMORGAN CHASE & CO Added +291,229+291.2k

Biggest sellers

Pictet Asset Management Holding SA Reduced -2,267,281-2.3m
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Sold out -1,471,184-1.5m
Conestoga Capital Advisors, LLC Reduced -1,410,003-1.4m
Invesco Ltd. Reduced -1,318,131-1.3m
JANUS HENDERSON GROUP PLC Reduced -1,043,557-1.0m
T. Rowe Price Investment Management, Inc. Sold out -982,039-982.0k
BAMCO INC /NY/ Reduced -720,342-720.3k
AXA S.A. Sold out -707,144-707.1k
WELLINGTON MANAGEMENT GROUP LLP Sold out -702,581-702.6k
BlackRock, Inc. Reduced -565,929-565.9k

Biggest calls

Walleye Trading LLC Added $4.8m43.9k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $3.5m31.7k shares
CITADEL ADVISORS LLC Added $1.9m17.3k shares
Walleye Capital LLC New $1.8m16.1k shares
SIMPLEX TRADING, LLC Added $1.5m13.5k shares
WOLVERINE TRADING, LLC New $1.3m11.9k shares
GROUP ONE TRADING LLC New $1.2m10.8k shares
Meteora Capital, LLC New $763.8k7.0k shares
MILLENNIUM MANAGEMENT LLC Reduced $731.0k6.7k shares
JANE STREET GROUP, LLC New $654.7k6.0k shares

Biggest puts

Twin Tree Management, LP New $12.3m112.7k shares
Parallax Volatility Advisers, L.P. Added $11.5m105.1k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $8.5m78.3k shares
SIMPLEX TRADING, LLC Added $6.9m63.1k shares
CITADEL ADVISORS LLC Added $2.9m26.4k shares
Walleye Trading LLC Added $2.4m21.7k shares
Walleye Capital LLC New $480.1k4.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2025-02-05 12.5% 7.5m 2025-02-05

Holders, Q4 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Matrix Capital Management Company, LP 63.04% of their portfolio Portsmouth, NH 12,430,00012.4m $1.4bn $1.4bn 63.04% Unchanged
2 BlackRock, Inc. 0.02% of their portfolio New York, NY 7,478,8567.5m $816.0m $816.0m 0.02% Reduced -565.9k -565,929
3 VANGUARD GROUP INC 0.01% of their portfolio Valley Forge, PA 6,894,2306.9m $752.2m $752.2m 0.01% Added +317.6k +317,575
4 HBK INVESTMENTS L P 5.76% of their portfolio DALLAS, TX 2,779,5182.8m $303.3m $303.3m 5.76% Not comparable
5 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 2,122,3192.1m $231.6m $231.6m 0.01% Added +68.4k +68,362
6 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 1,394,1241.4m $152.1m $152.1m 0.01% Reduced -29.8k -29,756
7 Impax Asset Management Group plc 0.59% of their portfolio LONDON, X0 1,196,0981.2m $129.5m $129.5m 0.59% Reduced -164.1k -164,123
8 Conestoga Capital Advisors, LLC 1.61% of their portfolio WAYNE, PA 1,112,5481.1m $121.4m $121.4m 1.61% Reduced -1.4m -1,410,003
9 ALLIANCEBERNSTEIN L.P. 0.04% of their portfolio NASHVILLE, TN 1,066,0161.1m $116.3m $116.3m 0.04% Reduced -204.6k -204,587
10 GOLDMAN SACHS GROUP INC 0.02% of their portfolio NEW YORK, NY 909,907909.9k $99.3m $99.3m 0.02% Added +566.1k +566,105
11 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 2.45% of their portfolio CHICAGO, IL 897,580897.6k $97.9m $97.9m 2.45% Not comparable
12 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 751,191751.2k $82.0m $82.0m 0.01% Added +63.4k +63,368
13 Candriam S.C.A. 0.39% of their portfolio STRASSEN, N4 614,335614.3k $67.0m $67.0m 0.39% Reduced -86.4k -86,363
14 DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio AUSTIN, TX 591,573591.6k $64.5m $64.5m 0.02% Added +12.6k +12,585
15 Magnetar Financial LLC 1.43% of their portfolio EVANSTON, IL 569,534569.5k $62.1m $62.1m 1.43% New
16 Aberdeen Group plc 0.12% of their portfolio EDINBURGH, X0 566,936566.9k $61.9m $61.9m 0.12% Unchanged
17 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 566,791566.8k $61.8m $61.8m 0.00% Added +291.2k +291,229
18 MILLENNIUM MANAGEMENT LLC 0.05% of their portfolio NEW YORK, NY 560,612560.6k $61.2m $61.2m 0.05% New
19 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 547,863547.9k $59.8m $59.8m 0.00% Reduced -142.8k -142,827
20 BAMCO INC /NY/ 0.15% of their portfolio NEW YORK, NY 539,002539.0k $58.8m $58.8m 0.15% Reduced -720.3k -720,342
21 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio SAN FRANCISCO, CA 506,579506.6k $55.3m $55.3m 0.01% Added +1.1k +1,109
22 AQR Arbitrage LLC 1.26% of their portfolio Greenwich, CT 487,904487.9k $53.2m $53.2m 1.26% New
23 Bank of New York Mellon Corp 0.01% of their portfolio NEW YORK, NY 421,883421.9k $46.0m $46.0m 0.01% Reduced -48.9k -48,877
24 Man Group plc 0.13% of their portfolio LONDON, X0 393,713393.7k $43.0m $43.0m 0.13% New
25 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio NEW YORK, NY 381,061381.1k $41.6m $41.6m 0.01% Added +254.4k +254,448
26 ROYAL BANK OF CANADA 0.01% of their portfolio TORONTO, A6 364,814364.8k $39.8m $39.8m 0.01% Reduced -50.6k -50,554
27 NORGES BANK 0.00% of their portfolio OSLO, Q8 347,348347.3k $37.9m $37.9m 0.00% Added +288.8k +288,766
28 Thematics Asset Management 1.63% of their portfolio PARIS, I0 341,939341.9k $37.3m $37.3m 1.63% Reduced -34.3k -34,342
29 Schonfeld Strategic Advisors LLC 0.23% of their portfolio NEW YORK, NY 331,528331.5k $36.2m $36.2m 0.23% Added +329.0k +329,016
30 FRANKLIN RESOURCES INC 0.01% of their portfolio San Mateo, CA 330,957331.0k $36.1m $36.1m 0.01% Reduced -97.3k -97,326
31 TUDOR INVESTMENT CORP ET AL 0.37% of their portfolio STAMFORD, CT 316,994317.0k $34.6m $34.6m 0.37% New
32 Woodline Partners LP 0.22% of their portfolio San Francisco, CA 299,998300.0k $32.7m $32.7m 0.22% New
33 FARALLON CAPITAL MANAGEMENT, L.L.C. 0.16% of their portfolio SAN FRANCISCO, CA 282,000282.0k $30.8m $30.8m 0.16% Not comparable
34 PRIMECAP MANAGEMENT CO/CA/ 0.02% of their portfolio PASADENA, CA 238,363238.4k $26.0m $26.0m 0.02% Reduced -84.1k -84,130
35 NEEDHAM INVESTMENT MANAGEMENT LLC 1.89% of their portfolio NEW YORK, NY 225,000225.0k $24.5m $24.5m 1.89% Reduced -6.5k -6,500
36 CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio TORONTO ONTARIO, A6 222,600222.6k $24.3m $24.3m 0.02% New
37 TIG Advisors, LLC 1.86% of their portfolio New York, NY 220,467220.5k $24.1m $24.1m 1.86% New
38 California Public Employees Retirement System 0.02% of their portfolio Sacramento, CA 220,435220.4k $24.1m $24.1m 0.02% Added +127.0k +127,009
39 Westchester Capital Management, LLC 1.33% of their portfolio VALHALLA, NY 210,020210.0k $22.9m $22.9m 1.33% New
40 AMERIPRISE FINANCIAL INC 0.01% of their portfolio MINNEAPOLIS, MN 203,035203.0k $22.2m $22.2m 0.01% Reduced -485.2k -485,223
41 Hudson Bay Capital Management LP 0.13% of their portfolio STAMFORD, CT 202,091202.1k $22.1m $22.1m 0.13% New
42 STATE OF WISCONSIN INVESTMENT BOARD 0.06% of their portfolio MADISON, WI 197,530197.5k $21.6m $21.6m 0.06% Added +97.5k +97,452
43 Davidson Kempner Capital Management LP 0.37% of their portfolio New York, NY 192,694192.7k $21.0m $21.0m 0.37% Not comparable
44 UBS Group AG 0.00% of their portfolio ZURICH, V8 192,502192.5k $21.0m $21.0m 0.00% Added +158.1k +158,136
45 HSBC HOLDINGS PLC 0.01% of their portfolio LONDON, X0 180,621180.6k $19.7m $19.7m 0.01% New
46 RHUMBLINE ADVISERS 0.02% of their portfolio BOSTON, MA 178,626178.6k $19.5m $19.5m 0.02% Added +1.9k +1,875
47 Slotnik Capital, LLC 8.84% of their portfolio DALLAS, TX 177,629177.6k $19.4m $19.4m 8.84% New
48 LMR Partners LLP 0.33% of their portfolio LONDON, X0 171,713171.7k $18.7m $18.7m 0.33% New
49 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 169,113169.1k $18.5m $18.5m 0.01% Added +7.0k +7,047
50 PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio DES MOINES, IA 168,665168.7k $18.4m $18.4m 0.01% Added +2.9k +2,872
51 COMERICA BANK 0.07% of their portfolio DALLAS, TX 163,222163.2k $17.8m $17.8m 0.07% Reduced -36.9k -36,862
52 KING LUTHER CAPITAL MANAGEMENT CORP 0.07% of their portfolio FORT WORTH, TX 158,402158.4k $17.3m $17.3m 0.07% Reduced -16.3k -16,331
53 BARCLAYS PLC 0.01% of their portfolio LONDON, X0 149,483149.5k $16.3m $16.3m 0.01% Added +44.6k +44,639
54 WATER ISLAND CAPITAL LLC 1.89% of their portfolio NEW YORK, NY 144,509144.5k $15.8m $15.8m 1.89% New
55 One68 Global Capital, LLC 8.17% of their portfolio NEW YORK, NY 140,043140.0k $15.3m $15.3m 8.17% First filing
56 Swiss National Bank 0.01% of their portfolio ZURICH, V8 116,900116.9k $12.8m $12.8m 0.01% Added +5.7k +5,700
57 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 113,823113.8k $12.4m $12.4m 0.00% Reduced -43.8k -43,773
58 FIL Ltd 0.01% of their portfolio HAMILTON, D0 113,000113.0k $12.3m $12.3m 0.01% New
59 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio Boston, MA 100,659100.7k $11.0m $11.0m 0.02% New
60 Legal & General Group Plc 0.00% of their portfolio London, X0 95,74395.7k $10.4m $10.4m 0.00% Added +4.0k +3,979
61 Corebridge Financial, Inc. 0.06% of their portfolio HOUSTON, TX 94,23194.2k $10.3m $10.3m 0.06% Reduced -6.2k -6,170
62 Grantham, Mayo, Van Otterloo & Co. LLC 0.03% of their portfolio Boston, MA 92,43492.4k $10.1m $10.1m 0.03% New
63 CITIGROUP INC 0.01% of their portfolio NEW YORK, NY 91,46091.5k $10.0m $10.0m 0.01% Added +40.9k +40,942
64 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.02% of their portfolio TORONTO, A6 91,00091.0k $9.9m $9.9m 0.02% Added +76.8k +76,800
65 MARSHALL WACE, LLP 0.01% of their portfolio LONDON, X0 89,27389.3k $9.7m $9.7m 0.01% Added +87.1k +87,069
66 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 87,83087.8k $9.6m $9.6m 0.00% Reduced -1.3m -1,318,131
67 VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio ATLANTA, GA 87,08987.1k $9.5m $9.5m 0.01% Added +9.6k +9,612
68 NICHOLAS COMPANY, INC. 0.15% of their portfolio MILWAUKEE, WI 85,96086.0k $9.4m $9.4m 0.15% Unchanged
69 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 80,95681.0k $8.8m $8.8m 0.00% Reduced -4.1k -4,100
70 Stephens Investment Management Group LLC 0.11% of their portfolio LITTLE ROCK, AR 76,73576.7k $8.4m $8.4m 0.11% Reduced -299.5k -299,544
71 New York Life Investment Management LLC 0.08% of their portfolio New York, NY 76,36376.4k $8.3m $8.3m 0.08% Added +70.0k +70,017
72 Squarepoint Ops LLC 0.02% of their portfolio NEW YORK, NY 75,77975.8k $8.3m $8.3m 0.02% Added +18.6k +18,572
73 MERCER GLOBAL ADVISORS INC /ADV 0.02% of their portfolio DENVER, CO 72,94572.9k $8.0m $8.0m 0.02% New
74 Retirement Systems of Alabama 0.03% of their portfolio MONTGOMERY, AL 72,68572.7k $7.9m $7.9m 0.03% Added +494 +494
75 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 70,04770.0k $7.6m $7.6m 0.00% Added +57.7k +57,675
76 Pentwater Capital Management LP 0.13% of their portfolio Naples, FL 69,36269.4k $7.6m $7.6m 0.13% New
77 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio BALA CYNWYD, PA 68,26268.3k $7.4m $7.4m 0.01% Added +60.8k +60,814
78 Lighthouse Investment Partners, LLC 0.28% of their portfolio Palm Beach Gardens, FL 67,16267.2k $7.3m $7.3m 0.28% Added +56.7k +56,662
79 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.01% of their portfolio Toronto, A6 66,96467.0k $7.3m $7.3m 0.01% Reduced -2.2k -2,234
80 Homestead Advisers Corp 0.18% of their portfolio Arlington, VA 66,87766.9k $7.3m $7.3m 0.18% Reduced -7.5k -7,500
81 MetLife Investment Management, LLC 0.04% of their portfolio Whippany, NJ 65,22765.2k $7.1m $7.1m 0.04% Added +3.3k +3,317
82 ClearAlpha Technologies LP 6.09% of their portfolio Greenwich, CT 64,98765.0k $7.1m $7.1m 6.09% New
83 WINTON GROUP Ltd 0.47% of their portfolio LONDON, X0 64,85164.9k $7.1m $7.1m 0.47% New
84 MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.08% of their portfolio New York, NY 64,02064.0k $7.0m $7.0m 0.08% Reduced -568 -568
85 SIT INVESTMENT ASSOCIATES INC 0.16% of their portfolio Minneapolis, MN 63,54363.5k $6.9m $6.9m 0.16% Unchanged
86 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.04% of their portfolio HARRISBURG, PA 63,20263.2k $6.9m $6.9m 0.04% Added +50.1k +50,102
87 Versor Investments LP 1.12% of their portfolio New York, NY 59,65559.7k $6.5m $6.5m 1.12% Added +54.6k +54,556
88 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.02% of their portfolio Paris, I0 55,95556.0k $6.1m $6.1m 0.02% New
89 FEDERATED HERMES, INC. 0.01% of their portfolio PITTSBURGH, PA 55,25355.3k $6.0m $6.0m 0.01% Reduced -366.5k -366,499
90 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio WEST SACRAMENTO, CA 55,22655.2k $6.0m $6.0m 0.01% Added +1.3k +1,340
91 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 53,99454.0k $5.9m $5.9m 0.00% First filing
92 Anson Funds Management LP 0.67% of their portfolio DALLAS, TX 50,08550.1k $5.5m $5.5m 0.67% New
93 Polar Asset Management Partners Inc. 0.08% of their portfolio TORONTO, A6 50,00050.0k $5.5m $5.5m 0.08% New
94 Calamos Advisors LLC 0.03% of their portfolio NAPERVILLE, IL 49,77349.8k $5.4m $5.4m 0.03% New
95 CANADA LIFE ASSURANCE Co 0.01% of their portfolio WINNIPEG, A2 46,35046.4k $5.1m $5.1m 0.01% Added +1.8k +1,773
96 Vestcor Inc 0.17% of their portfolio FREDERICTON, A3 46,04646.0k $5.0m $5.0m 0.17% New
97 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 45,64845.6k $5.0m $5.0m 0.00% Added +11.5k +11,529
98 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.02% of their portfolio JUPITER, FL 41,97442.0k $4.6m $4.6m 0.02% New
99 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.01% of their portfolio CAUSEWAY BAY, K3 39,02039.0k $4.3m $4.3m 0.01% Added +6.4k +6,367
100 NATIXIS 0.03% of their portfolio PARIS, I0 38,02438.0k $4.1m $4.1m 0.03% New