API GROUP CORP (APG) Institutional Shareholders
API GROUP CORP (APG) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $12.50B in APG holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of APG tracked by InsiderSet, reporting ownership valued at approximately $1.39B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.36B, representing an estimated loss of -2.07% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed APG value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Janus Henderson Group Plc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in API GROUP CORP (APG).
This page ranks the largest institutional APG shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
570
Total Reported Value
$12.50B
Largest Holder
Blackrock, Inc.
Largest Position
$1.39B
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
69
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 34,354,093 | $1,392,027,834 | $1,363,170,410 | -$28,857,424 | -2.07% | |
| Janus Henderson Group Plc | 0.47% | 23,367,041 | $946,845,651 | $927,204,187 | -$19,641,464 | -2.07% | |
| Vanguard Capital Management Llc | 0.02% | 16,615,915 | $673,276,876 | $659,319,507 | -$13,957,369 | -2.07% | |
| Vanguard Portfolio Management Llc | 0.03% | 15,617,230 | $632,810,160 | $619,691,686 | -$13,118,474 | -2.07% | |
| Durable Capital Partners | Henry Ellenbogen | 6.16% | 14,775,236 | $598,692,563 | $586,281,364 | -$12,411,199 | -2.07% |
| State Street Corp | 0.02% | 11,245,454 | $455,665,796 | $446,219,615 | -$9,446,181 | -2.07% | |
| Pictet Asset Management Holding Sa | 0.42% | 10,303,294 | $436,205,898 | $408,834,706 | -$27,371,192 | -6.27% | |
| Geode Capital Management, Llc | 0.02% | 8,208,479 | $332,679,596 | $325,712,447 | -$6,967,149 | -2.09% | |
| Invesco Ltd. | 0.04% | 6,549,442 | $265,383,392 | $259,881,859 | -$5,501,533 | -2.07% | |
| Artisan Partners Limited Partnership | 0.42% | 6,347,427 | $257,197,744 | $251,865,903 | -$5,331,841 | -2.07% | |
| Findlay Park Partners Llp | 3.38% | 5,981,698 | $242,378,403 | $237,353,777 | -$5,024,626 | -2.07% | |
| Viking Global Investors | Ole Andreas Halvorsen | 0.66% | 5,837,000 | $236,515,240 | $231,612,160 | -$4,903,080 | -2.07% |
| Fmr Llc | 0.01% | 5,048,812 | $204,577,888 | $200,336,860 | -$4,241,028 | -2.07% | |
| Westfield Capital Management Co Lp | 0.79% | 4,634,929 | $187,807,323 | $183,913,983 | -$3,893,340 | -2.07% | |
| Capital Research Global Investors | 0.03% | 4,592,561 | $186,090,572 | $182,232,820 | -$3,857,752 | -2.07% | |
| Montrusco Bolton Investments Inc. | 2.66% | 4,051,726 | $171,590,597 | $160,772,488 | -$10,818,109 | -6.30% | |
| Allspring Global Investments Holdings, Llc | 0.26% | 3,698,161 | $153,584,606 | $146,743,028 | -$6,841,578 | -4.45% | |
| Dimensional Fund Advisors Lp | 0.03% | 3,726,695 | $150,963,031 | $147,875,258 | -$3,087,773 | -2.05% | |
| Clearbridge Investments, Llc | 0.13% | 3,628,484 | $147,026,172 | $143,978,245 | -$3,047,927 | -2.07% | |
| Progeny 3, Inc. | 7.67% | 3,540,787 | $143,472,689 | $140,498,428 | -$2,974,261 | -2.07% | |
| Morgan Stanley | 0.01% | 3,206,851 | $129,941,659 | $127,247,848 | -$2,693,811 | -2.07% | |
| Royal London Asset Management Ltd | 0.26% | 3,071,924 | $124,474,360 | $121,893,944 | -$2,580,416 | -2.07% | |
| Northern Trust Corp | 0.02% | 3,053,570 | $123,730,656 | $121,165,658 | -$2,564,998 | -2.07% | |
| Milford Funds Ltd | 1.94% | 2,814,037 | $119,174,467 | $111,660,988 | -$7,513,479 | -6.30% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 2,940,696 | $119,157,002 | $116,686,817 | -$2,470,185 | -2.07% | |
| Charles Schwab Investment Management Inc | 0.02% | 2,931,883 | $118,799,899 | $116,337,117 | -$2,462,782 | -2.07% | |
| Bank Of America Corp | 0.01% | 2,511,809 | $101,778,502 | $99,668,581 | -$2,109,921 | -2.07% | |
| Lionstone Capital Management Llc | 24.29% | 2,476,270 | $100,338,460 | $98,258,394 | -$2,080,066 | -2.07% | |
| Vanguard Fiduciary Trust Co | 0.02% | 2,362,063 | $95,710,793 | $93,726,660 | -$1,984,133 | -2.07% | |
| Hood River Capital Management Llc | 0.95% | 2,346,561 | $95,082,652 | $93,111,540 | -$1,971,112 | -2.07% | |
| Snyder Capital Management L P | 1.72% | 2,183,406 | $88,471,611 | $86,637,550 | -$1,834,061 | -2.07% | |
| Bank Of New York Mellon Corp | 0.02% | 2,097,785 | $85,002,223 | $83,240,109 | -$1,762,114 | -2.07% | |
| Third Point | Daniel Loeb | 3.95% | 2,030,000 | $82,255,600 | $80,550,400 | -$1,705,200 | -2.07% |
| Schwartz Investment Counsel Inc | 2.58% | 1,836,893 | $77,792,419 | $72,887,914 | -$4,904,505 | -6.30% | |
| Capital World Investors | 0.01% | 1,871,016 | $75,813,568 | $74,241,915 | -$1,571,653 | -2.07% | |
| Cooke & Bieler Lp | 0.88% | 1,787,528 | $75,701,811 | $70,929,111 | -$4,772,700 | -6.30% | |
| Gladstone Capital Management Llp | 7.51% | 1,846,147 | $74,805,876 | $73,255,113 | -$1,550,763 | -2.07% | |
| William Blair Investment Management, Llc | 0.23% | 1,740,449 | $70,522,993 | $69,061,016 | -$1,461,977 | -2.07% | |
| Neuberger Berman Group Llc | 0.05% | 1,686,204 | $68,324,986 | $66,908,575 | -$1,416,411 | -2.07% | |
| Gates Capital Management, Inc. | 2.24% | 1,599,946 | $64,829,812 | $63,485,857 | -$1,343,955 | -2.07% | |
| Fisher Asset Management, Llc | 0.02% | 1,557,559 | $63,112,322 | $61,803,941 | -$1,308,381 | -2.07% | |
| ADW Capital Management | Adam Wyden | 26.22% | 1,482,110 | $60,055,097 | $58,810,125 | -$1,244,972 | -2.07% |
| M.D. Sass, Llc | 4.25% | 1,383,635 | $56,064,890 | $54,902,637 | -$1,162,253 | -2.07% | |
| Assenagon Asset Management S.A. | 0.07% | 1,320,526 | $55,924,276 | $52,398,472 | -$3,525,804 | -6.30% | |
| Teacher Retirement System Of Texas | 0.23% | 1,357,740 | $55,015,625 | $53,875,123 | -$1,140,502 | -2.07% | |
| Spyglass Capital Management Llc | 3.88% | 1,271,099 | $51,504,931 | $50,437,208 | -$1,067,723 | -2.07% | |
| Alliancebernstein L.P. | 0.02% | 1,286,448 | $49,219,500 | $51,046,257 | +$1,826,757 | +3.71% | |
| Congress Asset Management Co | 0.30% | 1,149,291 | $48,672,474 | $45,603,867 | -$3,068,607 | -6.30% | |
| Ubs Group Ag | 0.01% | 1,198,893 | $48,579,144 | $47,572,074 | -$1,007,070 | -2.07% | |
| Nuveen, Llc | 0.01% | 1,156,478 | $46,860,489 | $45,889,047 | -$971,442 | -2.07% |
Frequently asked questions about APG
Who owns the most APG stock?
The largest holders of APG are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for API GROUP CORP (APG).
Is APG widely held by superinvestors?
Many widely followed stocks like APG appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly APG is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.