[144] Centessa Pharmaceuticals plc American SEC Filing

Rhea-AI Filing Summary

Dimensional Fund Advisors LP (DFA) has filed a Schedule 13G indicating that, as of 30 June 2025, it beneficially owns 1,572,330 shares of Boston Omaha Corp ("BOC"), representing 5.1 % of the company’s outstanding common stock. The institutional investor reports sole voting power over 1,540,879 shares and sole dispositive power over the full 1,572,330-share position, with no shared voting or dispositive authority.

DFA, a Delaware limited partnership and SEC-registered investment adviser, explains that the shares are held across multiple mutual funds, commingled trusts and separate accounts for which it or its subsidiaries act as adviser or sub-adviser. While DFA may exercise voting and investment discretion, it expressly disclaims beneficial ownership in excess of the requirements of Section 13(d).

Crossing the 5 % ownership threshold triggers this disclosure and signals a modest increase in institutional ownership in BOC. Because DFA is predominantly a passive, quantitative manager, the filing does not suggest an activist agenda or an intention to influence control. Nevertheless, additional institutional sponsorship can enhance liquidity, broaden research coverage and potentially support the share price through index-related demand.

Key numeric details

• Date of event: 30 June 2025
• Shares owned: 1,572,330
• Percent of class: 5.1 %
• Sole voting power: 1,540,879
• Sole dispositive power: 1,572,330

Overall, the Schedule 13G is an informative but routine ownership disclosure that underscores growing passive interest in Boston Omaha without materially altering corporate governance or near-term strategy.

Positive

• Institutional ownership increases to 5.1 %: Dimensional Fund Advisors’ stake broadens BOC’s shareholder base and may improve trading liquidity.

Negative

• Potential future overhang risk: As a passive manager, DFA could rebalance or exit without strategic considerations, creating sell-side pressure if market conditions dictate.

Insights

Portfolio Manager

TL;DR Passive manager DFA owns 5.1 % of BOC; supports liquidity but unlikely to drive strategic change.

DFA’s 1.57 million-share stake crosses the SEC’s 5 % reporting line. As a quantitative index-oriented adviser, DFA buys for portfolio construction rather than activism. The passive nature limits governance impact, yet higher institutional ownership can narrow bid-ask spreads and reduce volatility. Given Boston Omaha’s market cap around US$700-800 million (not stated in filing, estimate withheld), the position is meaningful but not controlling. I classify the disclosure as moderately positive but not highly impactful for valuation.

Corporate Governance Specialist

TL;DR 5 % threshold reached; no control shift, disclosure mainly improves transparency for investors.

Schedule 13G filings from passive advisers highlight compliance rather than intent to influence. DFA’s disclaimer of beneficial ownership reinforces its non-activist stance. No group formation, subsidiary acquisition or voting agreement is reported. Therefore, board dynamics remain unchanged. The filing’s chief value lies in signalling rising institutional monitoring of BOC, which can enhance governance discipline over time. Impact: neutral to mildly positive.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	UBS Financial Services Inc. 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	6000	89566.80	133618774	07/15/2025	Nasdaq

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	07/15/2025	Exercise of Stock Options	Issuer			6000	07/15/2025	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Iqbal Hussain 3RD FLOOR 1 ASHLEY ROAD ALTRINCHAM, CHESHIRE X0 WA14 2DT	Common	05/01/2025	311	4354.00
Iqbal Hussain 3rd Floor 1 ASHLEY ROAD ALTRINCHAM, CHESHIRE X0 WA14 2DT	Common	04/28/2025	2080	29131.65
Iqbal Hussain 3RD FLOOR 1 ASHLEY ROAD ALTRINCHAM, CHESHIRE X0 WA14 2DT	Common	04/25/2025	3609	50526.36
Iqbal Hussain 3RD FLOOR 1 ASHLEY ROAD ALTRINCHAM, CHESHIRE X0 WA14 2DT	Common	06/24/2025	12000	168218.40

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

Why did Dimensional Fund Advisors file a Schedule 13G for Boston Omaha (BOC)?

DFA crossed the 5 % ownership threshold, triggering the SEC’s beneficial-ownership disclosure rule.

How many Boston Omaha shares does Dimensional Fund Advisors own?

The filing states 1,572,330 shares, equal to 5.1 % of outstanding common stock.

Does Dimensional Fund Advisors have voting control over Boston Omaha?

DFA reports sole voting power for 1,540,879 shares and no shared voting authority.

Is Dimensional Fund Advisors pursuing activism at Boston Omaha?

No. The Schedule 13G, rather than a 13D, and explicit disclaimers indicate a passive investment with no intent to influence control.

What is the significance of the 5 % ownership level for investors?

Crossing 5 % requires public disclosure, offering transparency about large holders and often signalling increased institutional attention.

When was the ownership position effective and when was the filing signed?

The relevant event date is 30 June 2025, and the filing was signed on 15 July 2025 by DFA’s Global Chief Compliance Officer.