WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

$30.3B reported 13(f) long value · latest quarter 2026-03-31 · CIK 1644956 · EDGAR ↗

sum of disclosed values for 2026-03-31; 0 positions carry a NULL value and are excluded from the sum, surfaced here rather than folded away: $30.3B
ALL retained default holdings for this (filer, period), including NULL-value ones: 413
positions with no comparable holding in the prior quarter (kind new), 2026-03-31: 47
positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record: 47

A quarter-end snapshot. Filed up to 45 days later, so this page is not current holdings and never a complete portfolio. what a 13F is — and is not ↓ methodology §13F ↗

Position changes — into 2026-03-31

by shares · Δ value · filing link · how changes are classified §

Position changes into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match `identity_reconciled_by_cusip`	the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE `classified_by_value` · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake	derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero	reported unit changed across the pair (SH↔PRN); the share delta is withheld rather than fabricated `shares_unit_mismatch`	Prev value	Curr value	Prev shares	Curr shares
position key `pos:17467` · issuer key `iss:1751` SPONSORED ADS	TRIM	+$46.8M	−467,070	$1.8B	$1.9B	5,985,330	5,518,260
position key `pos:15642` · issuer key `iss:1334` COM	TRIM	−$423M	−1,686,911	$2.0B	$1.6B	10,628,667	8,941,756
position key `pos:13215` · issuer key `iss:144` COM	TRIM	−$259M	−631,895	$1.5B	$1.2B	5,444,328	4,812,433
position key `pos:11825` · issuer key `iss:1225` COM	TRIM	−$616M	−593,520	$1.7B	$1.1B	3,490,302	2,896,782
position key `pos:15142` · issuer key `iss:89` CAP STK CL A	TRIM	−$267M	−650,368	$988M	$720M	3,154,973	2,504,605
position key `pos:12827` · issuer key `iss:323` COM	TRIM	−$197M	−335,053	$878M	$681M	2,536,611	2,201,558
position key `pos:14175` · issuer key `iss:95` COM	TRIM	−$354M	−1,223,374	$1.0B	$659M	4,387,003	3,163,629
position key `pos:11390` · issuer key `iss:720` CL A	TRIM	−$204M	−173,647	$783M	$580M	1,186,769	1,013,122
position key `pos:14206` · issuer key `iss:1193` CL A	TRIM	−$89.4M	−24,296	$619M	$530M	1,084,947	1,060,651
position key `pos:17695` · issuer key `iss:2037` ORD	NEW	+$377M	+1,942,155	$0	$377M	—	1,942,155
position key `pos:12681` · issuer key `iss:2154` SHS	TRIM	+$41.1M	−7,132	$274M	$315M	643,470	636,338
position key `pos:10185` · issuer key `iss:399` COM	TRIM	−$117M	−830,793	$422M	$305M	7,131,902	6,301,109
position key `pos:12030` · issuer key `iss:525` COM	TRIM	+$18.1M	−26,000	$283M	$301M	328,468	302,468
position key `pos:15356` · issuer key `iss:1020` SPON ADR REP PFD	TRIM	+$3.9M	−4,867,055	$262M	$266M	36,551,763	31,684,708
position key `pos:17149` · issuer key `iss:1835` COM	TRIM	+$61.5M	−684,711	$189M	$250M	5,954,429	5,269,718
position key `pos:13683` · issuer key `iss:1648` COM	ADD	−$81.2M	+222,834	$329M	$248M	2,148,780	2,371,614
position key `pos:12709` · issuer key `iss:1480` CLASS A COM SHS	ADD	+$39.4M	+428,772	$206M	$246M	12,627,420	13,056,192
position key `pos:10643` · issuer key `iss:1258` COM	ADD	+$29.4M	+329,823	$204M	$234M	1,779,906	2,109,729
position key `pos:13832` · issuer key `iss:996` COM	ADD	−$62.3M	+91,345	$293M	$231M	442,391	533,736
position key `pos:10330` · issuer key `iss:1250` COM	TRIM	−$75.7M	−826,002	$288M	$213M	3,761,249	2,935,247
position key `pos:14060` · issuer key `iss:47` COM	TRIM	−$74.8M	−296,952	$287M	$212M	1,339,546	1,042,594
position key `pos:15653` · issuer key `iss:2079` COM	TRIM	−$9.0M	−144,723	$220M	$211M	767,413	622,690
position key `pos:13319` · issuer key `iss:53` COM	TRIM	−$76.0M	−267,245	$281M	$205M	2,063,009	1,795,764
position key `pos:11403` · issuer key `iss:1342` COM	TRIM	−$67.9M	−771,473	$272M	$204M	2,981,507	2,210,034
position key `pos:12280` · issuer key `iss:218` COM	TRIM	+$9.3M	−125,818	$191M	$201M	1,107,600	981,782
position key `pos:15823` · issuer key `iss:1815` COM	TRIM	−$140M	−1,074,308	$340M	$200M	3,965,495	2,891,187
position key `pos:17216` · issuer key `iss:1366` COM	TRIM	−$74.8M	−762,374	$273M	$198M	1,726,587	964,213
position key `pos:16368` · issuer key `iss:953` COM	TRIM	−$101M	−89,703	$299M	$198M	441,324	351,621
position key `pos:10925` · issuer key `iss:1309` CLASS A COM	ADD	+$76.9M	+259,695	$119M	$196M	1,362,794	1,622,489
position key `pos:17260` · issuer key `iss:165` SPONSORED ADR	ADD	+$6.3M	+42,401	$188M	$194M	223,666	266,067
position key `pos:13868` · issuer key `iss:410` COM	TRIM	+$51.7M	−25,276	$142M	$194M	2,419,247	2,393,971
position key `pos:15974` · issuer key `iss:1099` COM	TRIM	+$33.2M	−81,540	$156M	$190M	2,125,260	2,043,720
position key `pos:14952` · issuer key `iss:731` COM	ADD	+$47.6M	+99,684	$140M	$188M	550,264	649,948
position key `pos:17033` · issuer key `iss:60` COM	NEW	+$186M	+1,619,060	$0	$186M	—	1,619,060
position key `pos:11527` · issuer key `iss:381` COM	TRIM	+$1.5M	−298,524	$181M	$183M	1,980,827	1,682,303
position key `pos:16115` · issuer key `iss:1869` COM	TRIM	−$69.4M	−88,980	$252M	$182M	762,243	673,263
position key `pos:14357` · issuer key `iss:1170` COM	TRIM	−$28.0M	−13,701	$206M	$178M	354,220	340,519
position key `pos:15764` · issuer key `iss:2177` ORD SHS CL A	TRIM	−$137M	−6,431,767	$313M	$176M	18,699,367	12,267,600
position key `pos:17000` · issuer key `iss:829` CL A	TRIM	−$46.8M	−510,019	$220M	$173M	2,519,782	2,009,763
position key `pos:13903` · issuer key `iss:354` COM NEW	ADD	+$103M	+604,157	$70.3M	$173M	437,501	1,041,658
position key `pos:12599` · issuer key `iss:1504` CL A	TRIM	−$80.7M	−861,447	$251M	$170M	3,742,928	2,881,481
position key `pos:11122` · issuer key `iss:1684` COM SHS	TRIM	−$125M	−219,473	$295M	$170M	1,346,998	1,127,525
position key `pos:15958` · issuer key `iss:1753` COM	TRIM	−$45.8M	−44,185	$213M	$168M	569,399	525,214
position key `pos:14792` · issuer key `iss:845` COM	ADD	+$91.2M	+526,594	$75.4M	$167M	453,140	979,734
position key `pos:14448` · issuer key `iss:2100` COM	TRIM	−$32.8M	−78,135	$198M	$165M	584,301	506,166
position key `pos:13979` · issuer key `iss:874` COM	ADD	+$39.2M	+683,019	$124M	$163M	1,842,956	2,525,975
position key `pos:13590` · issuer key `iss:1189` COM	ADD	−$7.9M	+2,189	$168M	$160M	270,203	272,392
position key `pos:15686` · issuer key `iss:478` COM	TRIM	−$2.0M	−204,923	$161M	$159M	873,060	668,137
position key `pos:17976` · issuer key `iss:547` COM	TRIM	+$4.9M	−45,768	$153M	$158M	277,837	232,069
position key `pos:17104` · issuer key `iss:1535` COM	ADD	+$50.3M	+78,210	$107M	$157M	759,283	837,493
position key `pos:13464` · issuer key `iss:303` COM	NEW	+$156M	+2,884,062	$0	$156M	—	2,884,062
position key `pos:16143` · issuer key `iss:448` COM NEW	TRIM	−$102M	−700,014	$257M	$155M	1,098,593	398,579
position key `pos:17243` · issuer key `iss:217` COM CL A	TRIM	−$32.2M	−749,321	$181M	$149M	7,543,813	6,794,492
position key `pos:14207` · issuer key `iss:973` COM PAR $.01	TRIM	−$64.9M	−318,430	$213M	$148M	1,221,096	902,666
position key `pos:12883` · issuer key `iss:2178` SHS	TRIM	+$5.7M	−141,285	$140M	$146M	1,375,159	1,233,874
position key `pos:10618` · issuer key `iss:511` COM	TRIM	−$33.6M	−191,646	$180M	$146M	4,585,833	4,394,187
position key `pos:12108` · issuer key `iss:891` COM	TRIM	−$31.3M	−195,592	$170M	$139M	1,855,208	1,659,616
position key `pos:15744` · issuer key `iss:402` COM	TRIM	+$6.8M	−66,663	$131M	$138M	417,559	350,896
position key `pos:13985` · issuer key `iss:597` COM	TRIM	−$14.3M	−92,523	$151M	$137M	1,707,872	1,615,349
position key `pos:15235` · issuer key `iss:125` CL A	NEW	+$136M	+1,077,434	$0	$136M	—	1,077,434
position key `pos:12577` · issuer key `iss:1126` COM	TRIM	−$12.9M	−74,961	$146M	$133M	609,812	534,851
position key `pos:17743` · issuer key `iss:1718` COM	ADD	+$119M	+282,167	$12.6M	$132M	41,254	323,421
position key `pos:10534` · issuer key `iss:1213` COM	TRIM	−$204M	−90,730	$334M	$129M	165,579	74,849
position key `pos:11969` · issuer key `iss:268` COM	ADD	−$12.4M	+64,222	$141M	$129M	2,398,265	2,462,487
position key `pos:10478` · issuer key `iss:460` COM	ADD	+$47.5M	+103,747	$79.6M	$127M	339,351	443,098
position key `pos:13510` · issuer key `iss:444` COM	ADD	+$2.6M	+597,632	$123M	$125M	3,313,041	3,910,673
position key `pos:16991` · issuer key `iss:1542` COM	ADD	+$41.6M	+123,152	$81.0M	$123M	280,335	403,487
position key `pos:13245` · issuer key `cusip6:739276` COM	NEW	+$122M	+2,380,677	$0	$122M	—	2,380,677
position key `pos:14260` · issuer key `iss:625` COM	ADD	+$3.9M	+71,648	$115M	$119M	558,744	630,392
position key `pos:16156` · issuer key `iss:617` COM NEW	ADD	−$20.0M	+13,198	$139M	$119M	3,215,853	3,229,051
position key `pos:15529` · issuer key `iss:253` COM CL B	ADD	+$16.9M	+707,550	$99.8M	$117M	2,615,173	3,322,723
position key `pos:15808` · issuer key `iss:825` COM	TRIM	−$9.4M	−33,099	$125M	$116M	1,106,918	1,073,819
position key `pos:17030` · issuer key `iss:740` COM	TRIM	−$12.4M	−277,929	$128M	$115M	5,336,021	5,058,092
position key `pos:10705` · issuer key `iss:2209` COM SHS	TRIM	−$24.7M	−162,937	$138M	$114M	1,236,321	1,073,384
position key `pos:13364` · issuer key `iss:1894` CL A COM	TRIM	−$83.7M	−237,898	$197M	$113M	881,223	643,325
position key `pos:17136` · issuer key `iss:613` CL A	TRIM	−$129M	−622,765	$242M	$113M	5,456,985	4,834,220
position key `pos:15763` · issuer key `iss:1738` COM	NEW	+$111M	+1,586,244	$0	$111M	—	1,586,244
position key `pos:16788` · issuer key `iss:1280` COM	TRIM	−$7.0M	−285,129	$116M	$109M	4,510,895	4,225,766
position key `pos:10376` · issuer key `iss:1461` CL A	TRIM	−$50.2M	−6,653	$158M	$108M	1,459,295	1,452,642
position key `pos:16001` · issuer key `iss:579` COM SHS	TRIM	−$14.8M	−376,107	$122M	$108M	1,802,571	1,426,464
position key `pos:10327` · issuer key `iss:780` COM	TRIM	−$12.1M	−139,582	$119M	$107M	1,952,767	1,813,185
position key `pos:16784` · issuer key `iss:2268` COM STK	ADD	+$98.4M	+1,280,433	$6.9M	$105M	125,175	1,405,608
position key `pos:16881` · issuer key `iss:1079` COM	ADD	+$12.4M	+30,838	$92.8M	$105M	376,340	407,178
position key `pos:13706` · issuer key `iss:804` COM	TRIM	−$905K	−296,590	$106M	$105M	6,059,287	5,762,697
position key `pos:16768` · issuer key `iss:1903` COM	ADD	+$14.5M	+147,953	$89.4M	$104M	399,551	547,504
position key `pos:11388` · issuer key `iss:1133` COM	NEW	+$103M	+304,575	$0	$103M	—	304,575
position key `pos:13645` · issuer key `iss:145` COM CL A	ADD	−$47.0M	+4,990	$148M	$102M	638,241	643,231
position key `pos:11816` · issuer key `iss:407` CL A	TRIM	−$44.1M	−211,114	$144M	$99.7M	1,468,206	1,257,092
position key `pos:18051` · issuer key `iss:447` COM	TRIM	−$32.1M	−52,024	$130M	$98.2M	1,145,413	1,093,389
position key `sid:sec:prov:ab1b825ce01b93b42cb9297b2afd1d80` · issuer key `cusip6:633707` CL A	NEW	+$96.9M	+2,474,861	$0	$96.9M	—	2,474,861
position key `pos:14802` · issuer key `iss:1329` COM	TRIM	−$15.7M	−125,822	$108M	$92.5M	908,906	783,084
position key `pos:10951` · issuer key `iss:2270` COM SHS	NEW	+$92.3M	+2,575,402	$0	$92.3M	—	2,575,402
position key `pos:12603` · issuer key `iss:74` COM	ADD	+$46.4M	+2,909,359	$45.5M	$91.9M	2,305,255	5,214,614
position key `pos:11701` · issuer key `iss:1466` COM	TRIM	−$27.4M	−67,563	$119M	$91.5M	519,836	452,273
position key `pos:14853` · issuer key `iss:1717` COM CL A	ADD	+$48.4M	+1,244,285	$43.0M	$91.4M	670,192	1,914,477
position key `pos:11484` · issuer key `iss:48` COM	TRIM	−$9.7M	−32,363	$99.6M	$89.9M	688,047	655,684
position key `pos:16591` · issuer key `iss:1051` COM	NEW	+$89.7M	+2,482,535	$0	$89.7M	—	2,482,535
position key `pos:17626` · issuer key `iss:860` COM	NEW	+$87.9M	+951,114	$0	$87.9M	—	951,114
position key `pos:16703` · issuer key `iss:1353` COM	TRIM	−$46.8M	−2,063,138	$133M	$86.1M	5,957,936	3,894,798
position key `pos:17169` · issuer key `iss:2104` SHS	TRIM	−$5.2M	−35,494	$91.2M	$86.0M	200,324	164,830

Flags: no row carries a flag.

1–20 of the 100 changes on this page

Mark-to-market only (no share change) · 5

Positions whose share count is identical in both quarters; the value changed with price, not with a decision.

Positions held with no share change into quarter 2026-03-31
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match `identity_reconciled_by_cusip`	the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE `classified_by_value` · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake	derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero	Prev value	Curr value	Prev shares	Curr shares
position key `pos:15694` · issuer key `iss:72` SPONSORED ADS	NO CHANGE	−$234K	$1.6M	$1.4M	11,067	11,067
position key `pos:11665` · issuer key `iss:523` COM	NO CHANGE	+$239K	$960K	$1.2M	14,319	14,319
position key `pos:11391` · issuer key `iss:1981` INDIA ERNGS FD	NO CHANGE	−$115K	$972K	$857K	21,000	21,000
position key `sid:sec:prov:e542ee81eff0c08d41f81d74ef1d2073` · issuer key `cusip6:46429B` MSCI INDIA SM CP	NO CHANGE	−$58.6K	$412K	$353K	5,892	5,892
position key `pos:17821` · issuer key `iss:89` CAP STK CL C	NO CHANGE	−$27.6K	$322K	$294K	1,025	1,025

Flags: no row carries a flag.

Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Truncated by Public Filings. Changes compare every position with a security identifier, new and exited included; holdings without one are counted, not compared. methodology §13F ↗

Reported positions — 2026-03-31

1–100 of 409 issuers · $30.3B disclosed value over 413 rows · 0 undisclosed-value rows

View

This build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.

This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names.

a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing

Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets.

value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TAIWAN SEMICONDUCTOR MANUFAC · SPONSORED ADS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$1.9B

5,518,260

6.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NVIDIA CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$1.6B

8,941,756

5.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

APPLE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$1.2B

4,812,433

4.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MICROSOFT CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$1.1B

2,896,782

3.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ALPHABET INC

2 positions · 2 reported rows

Rows WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reported for ALPHABET INC, as it reported them
ALPHABET INC · CAP STK CL A CUSIP — src ↗	$720M	2,504,605
ALPHABET INC · CAP STK CL C CUSIP — src ↗	$294K	1,025

$721M

2,505,630

2.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BROADCOM INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$681M

2,201,558

2.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

AMAZON COM INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$659M

3,163,629

2.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

META PLATFORMS INC · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$580M

1,013,122

1.9%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MASTERCARD INCORPORATED · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$530M

1,060,651

1.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ASTRAZENECA PLC · ORD CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$377M

1,942,155

1.2%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

LINDE PLC · SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$315M

636,338

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CARLYLE GROUP INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$305M

6,301,109

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

COSTCO WHOLESALE CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$301M

302,468

1.0%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ITAU UNIBANCO HLDG S A · SPON ADR REP PFD CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$266M

31,684,708

0.9%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TWIST BIOSCIENCE CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$250M

5,269,718

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

SERVICENOW INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$248M

2,371,614

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PRIMO BRANDS CORPORATION · CLASS A COM SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$246M

13,056,192

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MUELLER INDS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$234M

2,109,729

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INTUIT · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$231M

533,736

0.8%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MONSTER BEVERAGE CORP NEW · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$213M

2,935,247

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ADVANCED MICRO DEVICES INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$212M

1,042,594

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CREDICORP LTD · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$211M

622,690

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

AGILENT TECHNOLOGIES INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$205M

1,795,764

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

OREILLY AUTOMOTIVE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$204M

2,210,034

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BWX TECHNOLOGIES INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$201M

981,782

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TRANSUNION · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$200M

2,891,187

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ONTO INNOVATION INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$198M

964,213

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

IDEXX LABS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$198M

351,621

0.7%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NEXTPOWER INC · CLASS A COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$196M

1,622,489

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ARGENX SE · SPONSORED ADR CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$194M

266,067

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CAVA GROUP INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$194M

2,393,971

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

LATTICE SEMICONDUCTOR CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$190M

2,043,720

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

F5 INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$188M

649,948

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

AKAMAI TECHNOLOGIES INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$186M

1,619,060

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CAMECO CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$183M

1,682,303

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

UNITEDHEALTH GROUP INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$182M

673,263

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MADRIGAL PHARMACEUTICALS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$178M

340,519

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NU HLDGS LTD · ORD SHS CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$176M

12,267,600

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GLOBUS MED INC · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$173M

2,009,763

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

C H ROBINSON WORLDWIDE IN · COM NEW CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$173M

1,041,658

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EVERPURE INC · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$170M

2,881,481

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

SNOWFLAKE INC · COM SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$170M

1,127,525

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

TALEN ENERGY CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$168M

525,214

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GRAND CANYON ED INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$167M

979,734

0.6%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EVEREST GROUP LTD · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$165M

506,166

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

HALOZYME THERAPEUTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$163M

2,525,975

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MARTIN MARIETTA MATLS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$160M

272,392

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

COHERENT CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$159M

668,137

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CURTISS WRIGHT CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$158M

232,069

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

REGAL REXNORD CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$157M

837,493

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BORGWARNER INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$156M

2,884,062

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CIENA CORP · COM NEW CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$155M

398,579

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

THE BALDWIN INSURANCE GRP IN · COM CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$149M

6,794,492

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

INSMED INC · COM PAR $.01 CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$148M

902,666

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NVENT ELEC PLC · SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$146M

1,233,874

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

COPART INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$146M

4,394,187

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

HEALTHEQUITY INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$139M

1,659,616

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CARPENTER TECHNOLOGY CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$138M

350,896

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DONALDSON INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$137M

1,615,349

0.5%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

AMPHENOL CORP · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$136M

1,077,434

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

LINCOLN ELEC HLDGS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$133M

534,851

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

STERLING INFRASTRUCTURE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$132M

323,421

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MERCADOLIBRE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$129M

74,849

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BIO-TECHNE CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$129M

2,462,487

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CLEAN HARBORS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$127M

443,098

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CHIPOTLE MEXICAN GRILL INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$125M

3,910,673

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

RELIANCE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$123M

403,487

0.4%

—

POWER INTEGRATIONS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

ticker not yet mapped

$122M

2,380,677

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

EAGLE MATLS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$119M

630,392

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DYNATRACE INC · COM NEW CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$119M

3,229,051

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BENTLEY SYS INC · COM CL B CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$117M

3,322,723

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GLAUKOS CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$116M

1,073,819

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

FIRST HORIZON CORPORATION · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$115M

5,058,092

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

SHARKNINJA INC · COM SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$114M

1,073,384

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VEEVA SYS INC · CL A COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$113M

643,325

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DOXIMITY INC · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$113M

4,834,220

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

SYNAPTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$111M

1,586,244

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NATIONAL VISION HLDGS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$109M

4,225,766

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

PLANET FITNESS MASTER ISSUER · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$108M

1,452,642

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

DIEBOLD NIXDORF INC · COM SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$108M

1,426,464

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

FRESHPET INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$107M

1,813,185

0.4%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

MILLICOM INTL CELLULAR S A · COM STK CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$105M

1,405,608

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

KRYSTAL BIOTECH INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$105M

407,178

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GARRETT MOTION INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$105M

5,762,697

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

VERISK ANALYTICS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$104M

547,504

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

LITTELFUSE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$103M

304,575

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

APPFOLIO INC · COM CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$102M

643,231

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CASELLA WASTE SYS INC · CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$99.7M

1,257,092

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

CHURCHILL DOWNS INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$98.2M

1,093,389

0.3%

—

NATIONAL BK HLDGS CORP · CL A CUSIP 633707104
2026-03-31 filed 2026-05-08 +38d

src ↗

ticker not yet mapped

$96.9M

2,474,861

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

NOVANTA INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$92.5M

783,084

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

BIRKENSTOCK HOLDING PLC · COM SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$92.3M

2,575,402

0.3%

—

ALIGNMENT HEALTHCARE INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

ticker not yet mapped

$91.9M

5,214,614

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

POOL CORP · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$91.5M

452,273

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

STEPSTONE GROUP INC · COM CL A CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$91.4M

1,914,477

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

ADVANCED DRAIN SYS INC DEL · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$89.9M

655,684

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

KENNAMETAL INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$89.7M

2,482,535

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

GUARDANT HEALTH INC · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$87.9M

951,114

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

OLD NATL BANCORP IND · COM CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$86.1M

3,894,798

0.3%

verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred)

FABRINET · SHS CUSIP —
2026-03-31 filed 2026-05-08 +38d

src ↗

$86.0M

164,830

0.3%

1–20 of the 100 issuers on this page

Change kind and share change are in Position changes above; Congress overlap is planned.

One line per issuer, largest first; a row with no issuer key stands on its own line. Open a line for its rows as this filer reported them. The list holds every row this filer reported for the quarter. Issuer totals on the holders pages count each manager's own report once; that never removes a row here. how positions are grouped ↗

Book shape

2026-03-31 · concentration · vs tracked median · tick = median

Top-25 concentration: 42.6%below median 80.0%
Concentration index: 146 bpsbelow median 446 bps
Positions with value: 413 / 413median book 97.5 positions

Concentration uses reported 13F long value, not total assets. The index is withheld when any position lacks a value. Medians are over the 8,748 tracked filers with a 2026-03-31 book; the index median over the 8,662 with a complete book.

holdings whose <value> did not parse — retained and counted, never zero-filled: 0 · share of the period's disclosed value held in the top-N positions; denominator is reported 13F value, not total assets: 42.6% · integer Herfindahl–Hirschman index in basis points over disclosed position values: 146 · QoQ moves: 460

Filing history

AVAILABLE QUARTERS

Available filing periods
Period	Source
2026-03-31	EDGAR ↗

PLANNED sector rotation · Congress overlap · signals for this filer

Complete source filings on SEC EDGAR

The complete filing on EDGAR.

The position list above is served from the published Public Filings build, each position as this filer reported it; where the page cannot embed every reported row, the list says how many it leaves out. This block is provenance, not a substitute: the filing itself is the record, and it is one click away. Public Filings decided on 2026-08-01 to serve this list from its published build; filings newer than this build are on EDGAR.

Open WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's 13F filings on SEC EDGAR ↗

Notes on this data

Reported positions

Quarter-end holdings as filed

Explore the full published position list and its source filing. This record excludes the manager’s cash, shorts and non-13(f) assets.

Share changes

Compare consecutive quarters

Position changes retain the producer’s classification and comparability flags. Share counts and reported values describe different changes.

Coverage

A snapshot, not current holdings

Use the quarter selector to inspect available periods. Unknown values stay unknown and each table states its coverage.

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.

Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).