Vault-13

INTEGRAL AD SCIENCE HLDNG CO IAS

COM · Common Stock · CUSIP 45828L108 · ISIN US45828L1089

188 institutional holders +23 vs Q4 2024
158,880,725158.9m shares reported held*
$1.3bnreported value*
44 new 53 added 62 reduced 26 sold out net sold ≈ $1.8m (-225.6k 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 ($1.5m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $8.06. Options: 3 managers hold calls ($293.4k notional), 2 hold puts ($14.5k).

Trends to Q1 2025

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 104Q4 22: 108Q1 23: 117Q2 23: 169Q3 23: 165Q4 23: 174Q1 24: 166Q2 24: 156Q3 24: 172Q4 24: 165Q1 25: 188188Q3 22Q1 23Q3 23Q1 24Q3 24Q1 25
Numbers
QuarterHolders
Q3 2022104
Q4 2022108
Q1 2023117
Q2 2023169
Q3 2023165
Q4 2023174
Q1 2024166
Q2 2024156
Q3 2024172
Q4 2024165
Q1 2025188

Buyers vs sellers

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

Bought or addedCut or sold out
2000200Q2 23: 118 bought or addedQ2 23: 49 cut or sold outQ3 23: 103 bought or addedQ3 23: 80 cut or sold outQ3 23Q4 23: 101 bought or addedQ4 23: 68 cut or sold outQ1 24: 100 bought or addedQ1 24: 86 cut or sold outQ1 24Q2 24: 96 bought or addedQ2 24: 84 cut or sold outQ3 24: 91 bought or addedQ3 24: 83 cut or sold outQ3 24Q4 24: 81 bought or addedQ4 24: 97 cut or sold outQ1 25: 97 bought or addedQ1 25: 88 cut or sold outQ1 25
Numbers
QuarterBought or addedCut or sold out
Q2 202311849
Q3 202310380
Q4 202310168
Q1 202410086
Q2 20249684
Q3 20249183
Q4 20248197
Q1 20259788

Calls vs puts

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

CallsPuts
$0$2m$4m$6m$8mQ2 24 calls: $6.0mQ2 24 puts: $1.1mQ2 24P/C 0.18Q3 24 calls: $2.0mQ3 24 puts: $300.8kQ3 24P/C 0.15Q4 24 calls: $230.7kQ4 24 puts: $46.9kQ4 24P/C 0.20Q1 25 calls: $293.4kQ1 25 puts: $14.5kQ1 25P/C 0.05
Numbers
QuarterCallsPutsP/C
Q2 2024$6.0m$1.1m0.18
Q3 2024$2.0m$300.8k0.15
Q4 2024$230.7k$46.9k0.20
Q1 2025$293.4k$14.5k0.05

Biggest buyers

ALTA FOX CAPITAL MANAGEMENT, LLC Added +1,208,253+1.2m
Rubric Capital Management LP Added +1,193,079+1.2m
Cubist Systematic Strategies, LLC New +923,168+923.2k
Sunriver Management LLC Added +875,740+875.7k
Invenomic Capital Management LP Added +754,922+754.9k
DIMENSIONAL FUND ADVISORS LP Added +649,751+649.8k
MILLENNIUM MANAGEMENT LLC Added +342,646+342.6k
MONIMUS CAPITAL MANAGEMENT, LP Added +293,889+293.9k
ExodusPoint Capital Management, LP New +246,590+246.6k
JANE STREET GROUP, LLC New +246,429+246.4k

Biggest sellers

Alyeska Investment Group, L.P. Sold out -3,979,205-4.0m
AMERIPRISE FINANCIAL INC Reduced -1,005,470-1.0m
Ararat Capital Management LP Reduced -692,078-692.1k
CITADEL ADVISORS LLC Reduced -569,460-569.5k
Clearline Capital LP Sold out -378,252-378.3k
CenterBook Partners LP Reduced -367,164-367.2k
TimesSquare Capital Management, LLC Reduced -280,310-280.3k
Repertoire Partners LP Reduced -235,406-235.4k
Clearbridge Investments, LLC Reduced -218,904-218.9k
RENAISSANCE GROUP LLC Sold out -208,963-209.0k

Biggest calls

HARVEST MANAGEMENT LLC New $201.5k25.0k shares
CITADEL ADVISORS LLC Reduced $91.9k11.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Reduced $14.5k1.8k 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.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: GLAZER CAPITAL, LLC (4.2%, 2026-02-12), Vista Equity Partners Fund VI, L.P. (0.0%, 2025-12-29), Atlas Venture Fund VIII, L.P. (0.0%, 2025-12-23), Sunriver Management LLC (4.3%, 2025-11-13)

Holders, Q1 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VISTA EQUITY PARTNERS MANAGEMENT, LLC 48.74% of their portfolio San Francisco, CA 65,010,00165.0m $524.0m $524.0m 48.74% Unchanged
2 Atlas Venture Advisors, Inc. 50.04% of their portfolio BOSTON, MA 22,722,77022.7m $183.1m $183.1m 50.04% Unchanged
3 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 9,090,2299.1m $73.3m $73.3m 0.00% Added +41.7k +41,683
4 Sunriver Management LLC 8.12% of their portfolio GREENWICH, CT 8,166,7748.2m $65.8m $65.8m 8.12% Added +875.7k +875,740
5 BlackRock, Inc. 0.00% of their portfolio New York, NY 6,004,0706.0m $48.4m $48.4m 0.00% Reduced -35.4k -35,403
6 P2 Capital Partners, LLC 7.53% of their portfolio New York, NY 4,810,0004.8m $38.8m $38.8m 7.53% Unchanged
7 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 4,439,7474.4m $35.8m $35.8m 0.01% Added +649.8k +649,751
8 Rubric Capital Management LP 0.46% of their portfolio NEW YORK, NY 3,166,9493.2m $25.5m $25.5m 0.46% Added +1.2m +1,193,079
9 Corvex Management LP 0.82% of their portfolio NEW YORK, NY 2,618,0002.6m $21.1m $21.1m 0.82% Not comparable
10 Clearbridge Investments, LLC 0.02% of their portfolio NEW YORK, NY 2,510,5162.5m $20.2m $20.2m 0.02% Reduced -218.9k -218,904
11 Aberdeen Group plc 0.03% of their portfolio EDINBURGH, X0 1,994,9802.0m $16.1m $16.1m 0.03% Added +224.2k +224,153
12 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,888,8821.9m $15.2m $15.2m 0.00% Added +40.1k +40,144
13 TimesSquare Capital Management, LLC 0.22% of their portfolio NEW YORK, NY 1,719,8631.7m $13.9m $13.9m 0.22% Reduced -280.3k -280,310
14 Invenomic Capital Management LP 0.68% of their portfolio BOSTON, MA 1,649,9831.6m $13.3m $13.3m 0.68% Added +754.9k +754,922
15 Ararat Capital Management LP 6.27% of their portfolio WESTPORT, CT 1,589,8341.6m $12.8m $12.8m 6.27% Reduced -692.1k -692,078
16 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,562,7321.6m $12.6m $12.6m 0.00% Reduced -27.3k -27,325
17 JACOBS LEVY EQUITY MANAGEMENT, INC 0.04% of their portfolio FLORHAM PARK, NJ 1,378,2591.4m $11.1m $11.1m 0.04% Reduced -43.0k -42,978
18 Nuveen, LLC 0.00% of their portfolio CHARLOTTE, NC 1,352,0281.4m $10.9m $10.9m 0.00% First filing
19 ALTA FOX CAPITAL MANAGEMENT, LLC 3.88% of their portfolio FORT WORTH, TX 1,214,0531.2m $9.8m $9.8m 3.88% Added +1.2m +1,208,253
20 FRONTIER CAPITAL MANAGEMENT CO LLC 0.09% of their portfolio Boston, MA 967,456967.5k $7.8m $7.8m 0.09% Reduced -30.1k -30,055
21 Cubist Systematic Strategies, LLC 0.10% of their portfolio STAMFORD, CT 923,168923.2k $7.4m $7.4m 0.10% New
22 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 689,174689.2k $5.6m $5.6m 0.00% Added +12.0k +11,970
23 CenterBook Partners LP 0.33% of their portfolio GREENWICH, CT 651,880651.9k $5.3m $5.3m 0.33% Reduced -367.2k -367,164
24 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 588,895588.9k $4.7m $4.7m 0.00% Reduced -15.0k -14,953
25 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 585,569585.6k $4.7m $4.7m 0.00% Added +7.8k +7,837
26 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 532,437532.4k $4.3m $4.3m 0.00% Added +193.1k +193,070
27 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 525,696525.7k $4.2m $4.2m 0.00% Reduced -6.0k -5,968
28 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio TORONTO, A6 496,400496.4k $4.0m $4.0m 0.01% Added +95.4k +95,400
29 MONIMUS CAPITAL MANAGEMENT, LP 3.33% of their portfolio WOODBRIDGE, NJ 487,371487.4k $3.9m $3.9m 3.33% Added +293.9k +293,889
30 RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio NEW YORK, NY 440,000440.0k $3.5m $3.5m 0.01% Added +232.4k +232,400
31 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 406,770406.8k $3.3m $3.3m 0.00% Added +342.6k +342,646
32 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 389,093389.1k $3.1m $3.1m 0.00% Reduced -49.5k -49,498
33 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 310,032310.0k $2.5m $2.5m 0.00% Added +202.1k +202,087
34 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 291,079291.1k $2.3m $2.3m 0.00% Added +40.0k +39,988
35 ExodusPoint Capital Management, LP 0.03% of their portfolio NEW YORK, NY 246,590246.6k $2.0m $2.0m 0.03% New
36 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 246,429246.4k $2.0m $2.0m 0.00% New
37 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 241,285241.3k $2.0m $2.0m 0.00% Reduced -1.3k -1,274
38 RICE HALL JAMES & ASSOCIATES, LLC 0.11% of their portfolio San Diego, CA 235,212235.2k $1.9m $1.9m 0.11% Reduced -78.9k -78,917
39 PDT Partners, LLC 0.13% of their portfolio New York, NY 228,977229.0k $1.8m $1.8m 0.13% Added +26.9k +26,945
40 Jefferies Financial Group Inc. 0.03% of their portfolio NEW YORK, NY 225,000225.0k $1.8m $1.8m 0.03% New
41 Circumference Group LLC 2.10% of their portfolio Little Rock, AR 210,000210.0k $1.7m $1.7m 2.10% Added +20.0k +20,000
42 one8zero8, LLC 0.36% of their portfolio GREENSBORO, NC 187,050187.1k $1.5m $1.5m 0.36% Added +24.0k +24,000
43 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 173,365173.4k $1.4m $1.4m 0.00% Added +85.4k +85,399
44 Atom Investors LP 0.17% of their portfolio AUSTIN, TX 167,575167.6k $1.4m $1.4m 0.17% Reduced -150.0k -149,969
45 Quinn Opportunity Partners LLC 0.09% of their portfolio CHARLOTTESVILLE, VA 165,000165.0k $1.3m $1.3m 0.09% Added +85.0k +85,000
46 Swiss National Bank 0.00% of their portfolio ZURICH, V8 158,700158.7k $1.3m $1.3m 0.00% Unchanged
47 Inflection Point Investments LLP 2.75% of their portfolio LONDON, X0 156,899156.9k $1.3m $1.3m 2.75% New
48 UBS Group AG 0.00% of their portfolio ZURICH, V8 155,330155.3k $1.3m $1.3m 0.00% Reduced -186.7k -186,748
49 Verition Fund Management LLC 0.01% of their portfolio GREENWICH, CT 152,563152.6k $1.2m $1.2m 0.01% New
50 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 136,883136.9k $1.1m $1.1m 0.00% Reduced -569.5k -569,460
51 Schonfeld Strategic Advisors LLC 0.01% of their portfolio NEW YORK, NY 134,922134.9k $1.1m $1.1m 0.01% Reduced -51.4k -51,430
52 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 134,386134.4k $1.1m $1.1m 0.00% Reduced -7.8k -7,751
53 ESSEX INVESTMENT MANAGEMENT CO LLC 0.22% of their portfolio BOSTON, MA 128,408128.4k $1.0m $1.0m 0.22% Reduced -893 -893
54 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 119,700119.7k $964.8k $964.8k 0.00% Reduced -35.3k -35,310
55 FIRST TRUST ADVISORS LP 0.00% of their portfolio Wheaton, IL 116,259116.3k $937.0k $937.0k 0.00% Reduced -55.1k -55,119
56 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 115,127115.1k $927.9k $927.9k 0.00% New
57 Magnetar Financial LLC 0.01% of their portfolio EVANSTON, IL 107,327107.3k $865.1k $865.1k 0.01% New
58 Dana Investment Advisors, Inc. 0.03% of their portfolio BROOKFIELD, WI 106,944106.9k $862.0k $862.0k 0.03% New
59 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 101,663101.7k $819.4k $819.4k 0.00% Reduced -5.8k -5,787
60 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 100,070100.1k $806.6k $806.6k 0.01% New
61 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 99,93299.9k $805.5k $805.5k 0.00% Added +49.4k +49,388
62 Tejara Capital Ltd 0.40% of their portfolio London, X0 99,85499.9k $804.8k $804.8k 0.40% Added +39.9k +39,854
63 Washington Harbour Partners LP 2.24% of their portfolio ARLINGTON, VA 97,30097.3k $784.2k $784.2k 2.24% New
64 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 96,82996.8k $780.4k $780.4k 0.00% Reduced -1.0m -1,005,470
65 Semanteon Capital Management, LP 0.41% of their portfolio NEWTON, MA 94,66294.7k $763.0k $763.0k 0.41% New
66 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 94,56294.6k $762.2k $762.2k 0.00% Added +56.0k +56,042
67 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 92,42892.4k $745.0k $745.0k 0.00% Reduced -1.7k -1,715
68 Legal & General Group Plc 0.00% of their portfolio London, X0 88,74788.7k $715.3k $715.3k 0.00% Added +4.9k +4,890
69 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 88,25688.3k $711.3k $711.3k 0.00% New
70 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 84,47184.5k $680.8k $680.8k 0.00% Added +52.7k +52,664
71 INTECH INVESTMENT MANAGEMENT LLC 0.01% of their portfolio WEST PALM BEACH, FL 83,98884.0k $676.9k $676.9k 0.01% Added +34.5k +34,544
72 272 Capital LP 1.79% of their portfolio DALLAS, TX 83,93083.9k $676.5k $676.5k 1.79% Reduced -145.2k -145,207
73 OP Asset Management Ltd 0.01% of their portfolio HELSINKI, H9 81,65181.7k $658.1k $658.1k 0.01% First filing
74 FOX RUN MANAGEMENT, L.L.C. 0.10% of their portfolio GREENWICH, CT 79,42379.4k $640.1k $640.1k 0.10% New
75 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 76,58076.6k $617.2k $617.2k 0.00% Unchanged
76 JENNISON ASSOCIATES LLC 0.00% of their portfolio NEW YORK, NY 76,37376.4k $615.6k $615.6k 0.00% Added +12.8k +12,835
77 Point72 Asset Management, L.P. 0.00% of their portfolio STAMFORD, CT 76,15576.2k $613.8k $613.8k 0.00% New
78 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 74,87474.9k $603.5k $603.5k 0.00% Unchanged
79 GSA CAPITAL PARTNERS LLP 0.05% of their portfolio LONDON, X0 74,78774.8k $603.0k $603.0k 0.05% New
80 Factor Wealth Management LTD 0.18% of their portfolio CHICAGO, IL 74,40474.4k $599.7k $599.7k 0.18% Reduced -24.9k -24,920
81 CANADA PENSION PLAN INVESTMENT BOARD 0.00% of their portfolio TORONTO ONTARIO, A6 72,00072.0k $580.3k $580.3k 0.00% Unchanged
82 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 68,17368.2k $549.5k $549.5k 0.00% Reduced -9.1k -9,141
83 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 67,87967.9k $547.1k $547.1k 0.00% Reduced -198.4k -198,448
84 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 64,40664.4k $519.1k $519.1k 0.00% Reduced -20.7k -20,683
85 Versor Investments LP 0.08% of their portfolio New York, NY 63,60063.6k $512.6k $512.6k 0.08% Added +50.2k +50,200
86 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 61,80361.8k $498.1k $498.1k 0.00% Reduced -4.7k -4,723
87 Bayesian Capital Management, LP 0.08% of their portfolio Brooklyn, NY 58,10058.1k $468.3k $468.3k 0.08% New
88 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio BALA CYNWYD, PA 58,00258.0k $467.5k $467.5k 0.01% New
89 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 55,94155.9k $451.0k $451.0k 0.00% Added +38.4k +38,439
90 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 51,76051.8k $417.2k $417.2k 0.00% New
91 Repertoire Partners LP 2.58% of their portfolio NEW YORK, NY 49,30149.3k $397.4k $397.4k 2.58% Reduced -235.4k -235,406
92 Quantbot Technologies LP 0.01% of their portfolio NEW YORK, NY 47,68747.7k $384.4k $384.4k 0.01% New
93 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 45,32445.3k $365.3k $365.3k 0.00% Reduced -37.7k -37,652
94 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 44,04844.0k $355.0k $355.0k 0.00% Reduced -873 -873
95 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 43,32643.3k $349.2k $349.2k 0.00% Added +1.8k +1,807
96 Engineers Gate Manager LP 0.01% of their portfolio NEW YORK, NY 41,60541.6k $335.3k $335.3k 0.01% New
97 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 40,68940.7k $328.0k $328.0k 0.00% Reduced -12.8k -12,756
98 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 40,48340.5k $326.3k $326.3k 0.00% Added +3.9k +3,850
99 ALPS ADVISORS INC 0.00% of their portfolio Denver, CO 39,19039.2k $315.9k $315.9k 0.00% New
100 Legato Capital Management LLC 0.04% of their portfolio San Francisco, CA 38,23938.2k $308.2k $308.2k 0.04% Reduced -486 -486