COLUMBIA BANKING SYSTEM INC (COLB) Institutional Shareholders
COLUMBIA BANKING SYSTEM INC (COLB) 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 $6.71B in COLB holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of COLB tracked by InsiderSet, reporting ownership valued at approximately $742.39M 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 $846.32M, representing an estimated gain of +14.00% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed COLB value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Wellington Management Group Llp, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in COLUMBIA BANKING SYSTEM INC (COLB).
This page ranks the largest institutional COLB 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
525
Total Reported Value
$6.71B
Largest Holder
Blackrock, Inc.
Largest Position
$742.39M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
63
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 27,065,001 | $742,392,971 | $846,322,581 | +$103,929,610 | +14.00% | |
| Wellington Management Group Llp | 0.08% | 14,944,275 | $409,921,463 | $467,307,479 | +$57,386,016 | +14.00% | |
| Vanguard Portfolio Management Llc | 0.02% | 14,339,716 | $393,338,410 | $448,402,919 | +$55,064,509 | +14.00% | |
| Dimensional Fund Advisors Lp | 0.08% | 13,549,603 | $371,656,170 | $423,696,086 | +$52,039,916 | +14.00% | |
| Vanguard Capital Management Llc | 0.01% | 13,224,625 | $362,751,464 | $413,534,024 | +$50,782,560 | +14.00% | |
| State Street Corp | 0.01% | 12,476,160 | $342,221,069 | $390,129,523 | +$47,908,454 | +14.00% | |
| Charles Schwab Investment Management Inc | 0.04% | 10,439,791 | $286,363,467 | $326,452,265 | +$40,088,798 | +14.00% | |
| American Century Companies Inc | 0.14% | 9,736,069 | $267,060,399 | $304,446,878 | +$37,386,479 | +14.00% | |
| Bank Of New York Mellon Corp | 0.04% | 7,411,763 | $203,304,673 | $231,765,829 | +$28,461,156 | +14.00% | |
| Franklin Resources Inc | 0.04% | 6,187,147 | $169,713,442 | $193,472,087 | +$23,758,645 | +14.00% | |
| Massachusetts Financial Services Co | 0.06% | 6,024,374 | $166,819,189 | $188,382,175 | +$21,562,986 | +12.93% | |
| Geode Capital Management, Llc | 0.01% | 5,864,882 | $160,910,356 | $183,394,860 | +$22,484,504 | +13.97% | |
| Holdco Asset Management, Lp | 11.68% | 5,722,786 | $156,976,020 | $178,951,518 | +$21,975,498 | +14.00% | |
| Morgan Stanley | 0.01% | 4,902,181 | $134,466,931 | $153,291,200 | +$18,824,269 | +14.00% | |
| Silvercrest Asset Management Group Llc | 0.82% | 4,147,429 | $113,763,985 | $129,690,105 | +$15,926,120 | +14.00% | |
| Invesco Ltd. | 0.02% | 4,097,020 | $112,381,261 | $128,113,815 | +$15,732,554 | +14.00% | |
| Nomura Asset Management International Inc. | 0.18% | 3,901,345 | $107,015,000 | $121,995,058 | +$14,980,058 | +14.00% | |
| Ubs Group Ag | 0.02% | 3,525,562 | $96,706,166 | $110,244,324 | +$13,538,158 | +14.00% | |
| Citadel Advisors Llc | 0.06% | 3,173,756 | $87,056,127 | $99,243,350 | +$12,187,223 | +14.00% | |
| Northern Trust Corp | 0.01% | 2,615,067 | $71,731,288 | $81,773,145 | +$10,041,857 | +14.00% | |
| Epoch Investment Partners, Inc. | 0.42% | 2,531,279 | $69,432,983 | $79,153,094 | +$9,720,111 | +14.00% | |
| Fisher Asset Management, Llc | 0.02% | 2,321,964 | $63,691,471 | $72,607,814 | +$8,916,343 | +14.00% | |
| Manufacturers Life Insurance Company, The | 0.05% | 2,071,915 | $56,832,628 | $64,788,782 | +$7,956,154 | +14.00% | |
| Hancock Classic Value | Richard Pzena | 0.18% | 2,033,219 | $55,771,197 | $63,578,758 | +$7,807,561 | +14.00% |
| Vaughan Nelson Investment Management, L.P. | 0.49% | 1,713,172 | $54,907,162 | $53,570,888 | -$1,336,274 | -2.43% | |
| Vanguard Fiduciary Trust Co | 0.01% | 1,837,478 | $50,402,022 | $57,457,937 | +$7,055,915 | +14.00% | |
| Cooke & Bieler Lp | 0.56% | 1,500,913 | $48,104,262 | $46,933,550 | -$1,170,712 | -2.43% | |
| Bank Of America Corp | 0.00% | 1,451,405 | $39,812,053 | $45,385,434 | +$5,573,381 | +14.00% | |
| Goldman Sachs Group Inc | 0.00% | 1,342,501 | $36,824,804 | $41,980,006 | +$5,155,202 | +14.00% | |
| Systematic Financial Management Lp | 0.84% | 1,341,275 | $36,791,202 | $41,941,669 | +$5,150,467 | +14.00% | |
| Balyasny Asset Management L.P. | 0.07% | 1,280,063 | $35,112,128 | $40,027,570 | +$4,915,442 | +14.00% | |
| First Trust Advisors Lp | 0.02% | 1,203,045 | $32,999,524 | $37,619,217 | +$4,619,693 | +14.00% | |
| Stieven Capital Advisors, L.P. | 6.95% | 1,185,832 | $32,527,372 | $37,080,967 | +$4,553,595 | +14.00% | |
| Bnp Paribas Asset Management Holding S.A. | 0.04% | 1,178,573 | $32,328,257 | $36,853,978 | +$4,525,721 | +14.00% | |
| Mackenzie Financial Corp | 0.04% | 1,134,797 | $31,127,482 | $35,485,102 | +$4,357,620 | +14.00% | |
| Boston Partners | 0.03% | 1,092,044 | $30,011,880 | $34,148,216 | +$4,136,336 | +13.78% | |
| Quantinno Capital Management Lp | 0.05% | 1,066,686 | $29,259,198 | $33,355,271 | +$4,096,073 | +14.00% | |
| Capital World Investors | 0.00% | 1,063,800 | $29,180,034 | $33,265,026 | +$4,084,992 | +14.00% | |
| Easterly Investment Partners Llc | 1.44% | 884,032 | $28,333,226 | $27,643,681 | -$689,545 | -2.43% | |
| Leeward Investments, Llc - Ma | 1.26% | 861,441 | $27,609,184 | $26,937,260 | -$671,924 | -2.43% | |
| Lighthouse Investment Partners, Llc | 1.03% | 1,005,170 | $27,571,816 | $31,431,666 | +$3,859,850 | +14.00% | |
| Palisade Capital Management, Lp | 0.90% | 989,695 | $27,147,334 | $30,947,763 | +$3,800,429 | +14.00% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 876,027 | $24,029,421 | $27,393,364 | +$3,363,943 | +14.00% | |
| Algebris (Uk) Ltd | 1.72% | 866,672 | $23,733,603 | $27,100,833 | +$3,367,230 | +14.19% | |
| Ameriprise Financial Inc | 0.01% | 853,602 | $23,414,302 | $26,692,135 | +$3,277,833 | +14.00% | |
| Nuveen, Llc | 0.01% | 816,499 | $22,396,568 | $25,531,924 | +$3,135,356 | +14.00% | |
| Aqr Capital Management Llc | 0.01% | 812,826 | $22,214,542 | $25,417,069 | +$3,202,527 | +14.42% | |
| Raymond James Financial Inc | 0.01% | 792,983 | $21,751,520 | $24,796,578 | +$3,045,058 | +14.00% | |
| Rhumbline Advisers | 0.02% | 768,448 | $21,078,476 | $24,029,369 | +$2,950,893 | +14.00% | |
| Sei Investments Co | 0.02% | 717,785 | $19,688,533 | $22,445,137 | +$2,756,604 | +14.00% |
Frequently asked questions about COLB
Who owns the most COLB stock?
The largest holders of COLB 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 COLUMBIA BANKING SYSTEM INC (COLB).
Is COLB widely held by superinvestors?
Many widely followed stocks like COLB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly COLB 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.