PIASECKI NICOLE WEYERHAEUSER

SEC source: 0001123292-26-001241 · form4.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61.21

Underlying: Common Stock · 7.8 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001123292-26-000825 · form4.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53.41

Underlying: Common Stock · 6.6 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on four restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-26-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,672

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $180,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the issuer's common stock on the date of the grant.

SEC source: 0001183850-26-000002 · primary_doc.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,391.357

Underlying: Common · 7,832 shares

Expires not disclosed

F1 · shares: The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer receipt of 7,832 restricted stock units into an equal number of stock equivalents. The restricted stock units (rounded down to the nearest whole unit) represent the equity portion of the annual retainer fee in the amount of $180,000, with the number of units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director.

F1 · derivative.exercise_date: The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer receipt of 7,832 restricted stock units into an equal number of stock equivalents. The restricted stock units (rounded down to the nearest whole unit) represent the equity portion of the annual retainer fee in the amount of $180,000, with the number of units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director.

F1 · derivative.expiration_date: The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer receipt of 7,832 restricted stock units into an equal number of stock equivalents. The restricted stock units (rounded down to the nearest whole unit) represent the equity portion of the annual retainer fee in the amount of $180,000, with the number of units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director.

F2 · balance_after: Reported holdings include stock equivalents acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0001193125-26-220225 · ownership.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,840

F1 · shares: These shares are being withheld to cover taxes for a restricted stock unit vesting.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended, and reflect a cash payment in lieu of fractional shares upon the restricted stock unit vesting.

SEC source: 0001628280-26-029879 · wk-form4_1777927240.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 762

Underlying: Common Stock · 762 shares

Expires not disclosed

F1 · kind: Grant of restricted stock units pursuant to the 2020 Omnibus Incentive Plan of BWX Technologies, Inc. Each restricted stock unit represents a contingent right to receive one share of BWXT common stock.

F2 · derivative.exercise_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in five annual installments commencing one year after termination of service on the Board of Directors.

F2 · derivative.expiration_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in five annual installments commencing one year after termination of service on the Board of Directors.

SEC source: 0001628280-26-022102 · wk-form4_1774907302.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46.81

Underlying: Common Stock · 5.03 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001628280-25-056806 · wk-form4_1765576361.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41.78

Underlying: Common Stock · 5.25 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-25-000005 · wk-form4_1757371064.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36.53

Underlying: Common Stock · 5.74 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001628280-25-030271 · wk-form4_1749503596.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30.79

Underlying: Common Stock · 7.29 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on three restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-25-000003 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,706

F4 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $180,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $26.28, the average of the high ($26.50) and low ($26.06) price of the issuer's common stock on the date of the grant.

SEC source: 0001183850-25-000003 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,857

F1 · shares: These shares (rounded down to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

F3 · balance_after: The Reporting Person received a cash payment in lieu of fractional shares.

SEC source: 0001062993-25-008662 · form4.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,465

Underlying: Common Stock · 1,465 shares

Expires not disclosed

F1 · kind: Grant of restricted stock units pursuant to the 2020 Omnibus Incentive Plan of BWX Technologies, Inc. Each restricted stock unit represents a contingent right to receive one share of BWXT common stock.

F2 · derivative.exercise_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in five annual installments, commencing two years following termination of service on the Board of Directors.

F2 · derivative.expiration_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in five annual installments, commencing two years following termination of service on the Board of Directors.

SEC source: 0001628280-25-016010 · wk-form4_1743546028.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23.5

Underlying: Common Stock · 5.76 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001628280-24-051074 · wk-form4_1734041546.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17.74

Underlying: Common Stock · 4.49 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001628280-24-039895 · wk-form4_1725914553.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13.25

Underlying: Common Stock · 5.6 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-24-000003 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,790

SEC source: 0001628280-24-027549 · wk-form4_1718052452.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7.65

Underlying: Common Stock · 6.07 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on two restricted stock unit grants of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-24-000002 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,566

F2 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $180,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $31.085, the average of the high ($31.27) and low ($30.90) price of the issuer's common stock on the date of the grant.

SEC source: 0001183850-24-000002 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,776

F1 · shares: These shares (rounded down to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting.

F3 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

F4 · balance_after: The Reporting Person received a cash payment in lieu of fractional shares.

SEC source: 0001628280-24-021171 · wk-form4_1715115867.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,592

Underlying: Common Stock · 1,592 shares

Expires not disclosed

F1 · kind: Grant of restricted stock units pursuant to the 2020 Omnibus Incentive Plan of BWX Technologies, Inc. Each restricted stock unit represents a contingent right to receive one share of BWXT common stock.

F2 · derivative.exercise_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in three annual installments following termination of service on the Board of Directors.

F2 · derivative.expiration_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in three annual installments following termination of service on the Board of Directors.

SEC source: 0001628280-24-014109 · wk-form4_1712005328.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1.58

Underlying: Common Stock · 1.58 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on one restricted stock unit grant of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on one restricted stock unit grant of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on one restricted stock unit grant of which the reporting person has elected to defer receipt of the shares underlying the RSUs. Each RSU and DER represent a contingent right to receive one share of BWXT common stock. In accordance with the deferral election, the DERs will be delivered to the reporting person proportionately with the RSUs to which they relate.

SEC source: 0001183850-24-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,807

F1 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0001628280-24-000453 · wk-form4_1704405384.xml · derivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 676

Underlying: Common Stock · 676 shares

Expires not disclosed

F1 · kind: Grant of restricted stock units pursuant to the 2020 Omnibus Incentive Plan of BWX Technologies, Inc. Each restricted stock unit represents a contingent right to receive one share of BWXT common stock.

F2 · derivative.exercise_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in three annual installments following termination of service on the Board of Directors.

F2 · derivative.expiration_date: RSUs vested immediately. The reporting person elected to defer receipt of shares underlying the RSUs. In accordance with her deferral election, vested shares will be delivered to the reporting person in three annual installments following termination of service on the Board of Directors.

SEC source: 0001183850-23-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,132

F4 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $170,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $29.79, the average of the high ($29.99) and low ($29.59) price of the issuer's common stock on the date of the grant.

SEC source: 0001183850-23-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,426

F1 · shares: These shares (rounded down to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

F3 · balance_after: The Reporting Person received a cash payment in lieu of fractional shares.

SEC source: 0001104659-22-066733 · tm2217337-8_4seq1.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,877

SEC source: 0001183850-22-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,268

F4 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $160,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $38.175, the average of the high ($38.76) and low ($37.59) price of the issuer's common stock on the date of the grant.

SEC source: 0001183850-22-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,077

F1 · shares: These shares (rounded down to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

F3 · balance_after: The Reporting Person received a cash payment in lieu of fractional shares.

SEC source: 0001104659-21-075245 · tm2118198-8_4seq1.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,714

SEC source: 0001183850-21-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,863

F3 · shares: These shares (rounded down to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting.

F4 · balance_after: The reporting person received a cash payment in lieu of fractional shares.

SEC source: 0001183850-21-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,972.4458

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% after one year after the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $150,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $38.455, the average of the high ($38.75) and low ($38.16) price of the issuer's common stock on the date of the grant.

F2 · balance_after: Reported holdings include shares acquired from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0001183850-20-000003 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held as co-trustee of my mother's revocable trust

Disclosed balance after: 0

SEC source: 0001183850-20-000003 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,000.6431

SEC source: 0000004281-20-000143 · edgar.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,486

SEC source: 0001183850-20-000002 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,400.6431

F3 · shares: These shares are being withheld to cover taxes for a restricted stock unit vesting.

SEC source: 0001183850-20-000002 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,497.6431

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% after one year after the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $124,000, with the number of restricted stock units determined by dividing the dollar amount of the fee by $17.255 (the average of the high ($17.69) and low ($16.82) price of the issuer's common stock on the date of the grant.

F2 · balance_after: Reported holdings include shares acquired from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0000004281-20-000083 · edgar.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,351

SEC source: 0001183850-20-000001 · primary_doc.xml · nonDerivative · entry 3

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held as co-trustee of my mother's revocable trust.

Disclosed balance after: 445

F1 · balance_after: The reporting person is one of two trustees of the trust effective 02/28/2020.

SEC source: 0001183850-19-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,940

F3 · shares: These shares are being withheld to cover taxes for a restricted stock unit vesting.

SEC source: 0001183850-19-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,000

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% after one year after the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $150,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $24.585 (the average of the high ($24.87) and low ($24.30) price of the issuer's common stock on the date of the grant.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0001183850-18-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,700

F3 · shares: These shares are being withheld to cover taxes for a restricted stock unit vesting.

SEC source: 0001183850-18-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,784

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% after one year after the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $140,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $36.355 (the average of the high ($36.48) and low ($36.23) price of the issuer's common stock on the date of the grant.

F2 · balance_after: Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended.

SEC source: 0001183850-17-000001 · primary_doc.xml · nonDerivative · entry 2

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,767

F3 · shares: These shares are being withheld to cover taxes for a restricted stock unit vesting.

SEC source: 0001183850-17-000001 · primary_doc.xml · nonDerivative · entry 1

PIASECKI NICOLE WEYERHAEUSER · CIK 0001183850 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,828

F1 · shares: These shares were granted pursuant to a restricted stock unit award that vests 100% after one year.

F2 · balance_after: Reported holdings include shares acquired in dividend reinvestment transactions.