$BLDR

$56.70 +$0.49 (0.87%) Close

$BLDR Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 107.6M shares outstanding

Who owns BLDR?

By type of holder

Institutions 99.5% Insiders 0.0% Everyone else 0.5%

Concentration Top 10 holders own 41.3%

BlackRock, Inc. 7.3% · Vanguard Capital Management LLC 6.4%

Institutional ownership

99.5%

+1.0 pts vs last qtr

Institutional holders

666

-56 vs last qtr

Net shares bought

+1.1M

by institutions in Q2 2026

New / sold out

97 / 153

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Pictet Asset Management Holding SA +2.4M
D1 Capital Partners L.P. NEW +1.6M

Biggest sellers in Q2 2026

Boston Partners −1.6M
BlackRock, Inc. −927.9K

Who is planning to sell?

Notices of proposed sale, last 12 months

$391K

1 notice from 1 person

Shares covered

5.0K

0.00% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Rush David E Director $391K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−1.6%

−0.17% a year

Each share's claim on the business

+1.6%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$8.07B vs $296M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years58% 3–5 years5% 1–3 years18% Under 1 year19%

Quarterly turnover

17.4%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting BLDR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	7.8M	7.28%	−927.9K (−10.6%)	≤2021	0.0%
Shares held by quarter Peak holding10.0M (Q3'24) Change over 8 quarters−2.1M Share of the company7.280% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	6.9M	6.37%	−172.4K (−2.5%)	≤2021	0.0%
Shares held by quarter Peak holding7.0M (Q1'26) Change over 8 quarters+6.9M Share of the company6.370% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

7.8M

% of company

7.28%

Change vs last qtr

−927.9K (−10.6%)

Held since

≤2021

Vanguard Capital Management LLC

6.9M

% of company

6.37%

Change vs last qtr

−172.4K (−2.5%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Builders FirstSource Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting BLDR on Form N-PORT; together they hold 45.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$290M	3.2M	3.02%	0.01%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$249M	2.8M	2.59%	0.01%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$290M

% of company

3.02%

% of the fund

0.01%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$249M

% of company

2.59%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Builders FirstSource Inc and how much of the fund the position is.

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