Director at Tectonic Therapeutic (TECX) awarded 10,200 options

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Tectonic Therapeutic, Inc. reported that director and 10% owner Timothy A. Springer received a grant of stock options covering 10,200 shares of common stock. The options have an exercise price of $28.56 per share and expire on June 8, 2036.

The award vests in full on the earliest of June 9, 2027, the company’s 2027 annual stockholder meeting, or a defined change in control, provided he continues to serve the company through that date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider SPRINGER TIMOTHY A

Role null

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	10,200	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 10,200 shares (Direct, null)

Footnotes (1)

[object Object]

Key Figures

Option grant size: 10,200 options Exercise price: $28.56 per share Underlying shares: 10,200 shares +3 more

6 metrics

Option grant size 10,200 options Stock Option (Right to Buy) granted to Timothy A. Springer

Exercise price $28.56 per share Exercise price of stock options

Underlying shares 10,200 shares Common Stock underlying the options

Expiration date June 8, 2036 Option expiration

Total options after grant 10,200 options Total derivative securities following transaction

Primary vesting date June 9, 2027 Earliest scheduled vesting date, subject to service

Key Terms

Stock Option (Right to Buy), Change in Control, 2024 Equity Incentive Plan, Form 4, +1 more

5 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

Change in Control financial

"or (iii) a "Change in Control" (as defined in the Issuer's 2024 Equity Incentive Plan)"

A "change in control" occurs when the ownership or management of a company shifts significantly, such as through a merger, acquisition, or sale of a large part of its assets. This change can impact how the company is run and may influence its future direction. For investors, it matters because it can affect the company's stability, strategy, and value, often signaling potential changes in investment risk or opportunity.

2024 Equity Incentive Plan financial

"as defined in the Issuer's 2024 Equity Incentive Plan"

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

10% owner financial

"is_ten_percent_owner": 1"

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Form 4 Insider Transactions: What Each Field Means →

06/10/2026 - 04:45 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SPRINGER TIMOTHY A

(Last)

(First)

(Middle)

C/O TECTONIC THERAPEUTIC, INC.

490 ARSENAL WAY, SUITE 200

(Street)

WATERTOWN

MASSACHUSETTS

02472

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Tectonic Therapeutic, Inc. [ TECX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$28.56	06/09/2026		A		10,200		⁽¹⁾	06/08/2036	Common Stock	10,200	$0	10,200	D

Explanation of Responses:

1. The option shall vest in full on the earliest of (i) June 9, 2027, (ii) the date of the Issuer's 2027 Annual Meeting of Stockholders, or (iii) a "Change in Control" (as defined in the Issuer's 2024 Equity Incentive Plan) of the Issuer, subject in each case, to the Reporting Person providing continuous service to the Issuer on each such date.

	/s/ Daniel Lochner, Attorney-in-Fact	06/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Tectonic Therapeutic (TECX) report for Timothy A. Springer?

Tectonic Therapeutic reported that director and 10% owner Timothy A. Springer received a grant of stock options for 10,200 shares. These options are a compensation award, not an open-market purchase or sale, and give him the right to buy common shares at a set price later.

How large is Timothy A. Springer’s new stock option award at Tectonic Therapeutic (TECX)?

The new award covers 10,200 shares of Tectonic Therapeutic common stock through stock options. This means he can choose to buy up to 10,200 shares in the future at the fixed exercise price defined in the grant, subject to the vesting conditions being satisfied.

What is the exercise price and expiration date of the new TECX stock options?

The stock options granted to Timothy A. Springer have an exercise price of $28.56 per share and expire on June 8, 2036. He can only exercise them after they vest, and any unexercised options lapse after the stated expiration date if not used.

When do Timothy A. Springer’s Tectonic Therapeutic (TECX) options vest?

The options vest in full on the earliest of June 9, 2027, the company’s 2027 annual meeting of stockholders, or a defined change in control. Vesting requires that he continue providing service to Tectonic Therapeutic through whichever of these specified trigger dates occurs first.

Is the TECX Form 4 transaction a market buy or sell of shares?

The Form 4 shows a grant of stock options as compensation, not a market trade. Timothy A. Springer did not buy or sell common shares in the open market; he received options giving a future right to purchase shares at the fixed exercise price if he chooses.