$POST

$80.28 +$0.88 (1.11%) Close

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

Ownership

13F as of Q2 2026 · 44.0M shares outstanding

Who owns POST?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 58.7%

William P. Stiritz 11.1% · BlackRock, Inc. 9.0%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

415

-13 vs last qtr

Net shares bought

−166.8K

by institutions in Q2 2026

New / sold out

68 / 81

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Norges Bank NEW +1.3M
Citadel Advisors LLC +793.9K

Biggest sellers in Q2 2026

Two Sigma Investments, LP −752.4K
Holocene Advisors, LP −519.6K

Who is planning to sell?

Notices of proposed sale, last 12 months

$41.1M

6 notices from 5 people

Shares covered

459.0K

1.04% 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

Stiritz William P Director $32.8M
Sandra Zadoks Spouse of officer $5.7M

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

−8.6%

−0.99% a year

Each share's claim on the business

+9.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$2.29B vs $512M

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+ years76% 3–5 years7% 1–3 years9% Under 1 year9%

Quarterly turnover

12.3%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting POST on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	3.9M	8.95%	−46.3K (−1.2%)	≤2021	0.0%
Shares held by quarter Peak holding4.4M (Q2'25) Change over 8 quarters−321.5K Share of the company8.950% BlackRock, Inc.'s full portfolio →
DF Dimensional Fund Advisors LP	3.2M	7.18%	+84.8K (+2.8%)	≤2021	0.1%
Shares held by quarter Peak holding3.2M (Q4'24) Change over 8 quarters+26.1K Share of the company7.180% Dimensional Fund Advisors LP's full portfolio →

BlackRock, Inc.

3.9M

% of company

8.95%

Change vs last qtr

−46.3K (−1.2%)

Held since

≤2021

Dimensional Fund Advisors LP

3.2M

% of company

7.18%

Change vs last qtr

+84.8K (+2.8%)

Held since

≤2021

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting POST on Form N-PORT; together they hold 44.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Mid-Cap ETF iShares Trust	$120M	1.4M	3.10%	0.10%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$108M	1.2M	2.78%	0.00%	June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$120M

% of company

3.10%

% of the fund

0.10%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$108M

% of company

2.78%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Post Holdings, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
WP William P. Stiritz 5%+ holder 13D · 10.3%	4.9M	11.11%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company11.110% Disclosed stake13D · 10.3% View the 13D/G filing →
VR Vitale Robert V Insider	1.8M	4.15%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company4.150% Vitale Robert V's insider activity →

William P. Stiritz

5%+ holder13D · 10.3%

4.9M

% of company

11.11%

Change vs last qtr

—

Held since

—

Vitale Robert V

Insider

1.8M

% of company

4.15%

Change vs last qtr

—

Held since

—

15 more holders behind a free account

See every insider and 5%+ holder of Post Holdings, Inc..

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