ALLEGHENY SCIENCE & TECHNOLOGY CORPORATION

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $76,500.00 TO CLIN 00047, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $7,116,025.72 TO $7,192,525.72. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO INCREMENTALLY FUND CLINS 10001, 10003, AND 10004.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $373,583.34 TO CLIN 00001, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $32,130,537.15 TO $32,504,120.49. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO IMPLEMENT A NEGOTIATED COST SAVINGS REDUCTION. TO THAT EXTENT THE TOTAL CEILING AND OBLIGATED AMOUNTS ARE DECREASED FOR VARIOUS CLINS.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $207,763.96 TO CLIN 00047, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $333,263.98 TO $541,027.94. 2. ADD INCREMENTAL FUNDING OF $58.83 TO CLIN 00008, INCREASING THE TOTAL OBLIGA

THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $8,890.11 FOR INVOICE DISCOUNTS FOR ACCOUNTING CORRECTION THROUGH SEPTEMBER 30, 2025 ON CLIN 005. THIS MODIFICATION: 1. DEOBLIGATES FUNDING FROM CLIN 005 IN THE AMOUNT OF $8,890.11. 2. THE T

THE PURPOSE OF THIS MODIFICATION IS TO: 1. REVISE THE LANGUAGE IN MOD P00032 FROM, DE-OBLIGATE INVOICE DISCOUNTS ON CLIN 00001 OF ($29,311.46), DECREASING THE OBLIGATED AMOUNT ON CLIN 00001 FROM $30,465,962.25 TO $30,436,650.79 TO DE-OBLIGATE INVOI

THE PURPOSE OF THIS MODIFICATION IS TO: 1. DE-OBLIGATE INVOICE DISCOUNTS OF ($5,051.04) DECREASING THE TOTAL OBLIGATED AMOUNT FROM $6,913,253.97 TO $6,908,202.93. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. EXERCISE 6-MONTH OPTION IAW FAR 52.217-8, OPTION TO EXTEND SERVICES. 2. OPTION FOUR PERIOD OF PERFORMANCE HAS CHANGED BY SIX MONTHS, FROM 10/18/2025 TO 04/18/2026. 3. ADD INCREMENTAL FUNDING OF $333,263.9

THE PURPOSE OF THIS MODIFICATION IS TO: 1. DE-OBLIGATE INVOICE DISCOUNTS ON CLIN 00001 OF ($29,311.46), DECREASING THE OBLIGATED AMOUNT ON CLIN 00001 FROM $30,465,962.25 TO $30,436,650.79. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $1,843,844.80 INCREASING THE OBLIGATED AMOUNT FROM $28,622,117.45 TO $30,465,962.25. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

P00008 - INCREMENTAL FUNDING

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $1,224,934.63 INCREASING THE OBLIGATED AMOUNT FROM $27,397,182.82 TO $28,622,117.45. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $243,045.15, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $6,336,944.84 TO $6,579,989.99. 2. RECAST TO DE-OBLIGATE FY2024 FUNDS OF ($115,003.63). 3. RECAST TO RE-OBLIGATE FY2025

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $1,501,979.00 INCREASING THE OBLIGATED AMOUNT FROM $25,895,203.82 TO $27,397,182.82. 2. DE-OBLIGATE FUNDS OF $169,175.05, SWAP, AND RE-OBLIGATE FUNDS OF $169,175.05

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 OF $1,293,189.78 INCREASING THE OBLIGATED AMOUNT FROM $24,602,014.04 TO $25,895,203.82. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

P00006 - INCREMENTAL FUNDING

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $873,046.80 INCREASING THE OBLIGATED AMOUNT FROM $23,728,967.24 TO $24,602,014.04 ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THIS MODIFICATION IS TO: 1. OBLIGATES INCREMENTAL FUNDING IN THE AMOUNT OF $3,250.00. 2. THE AMOUNT OF OBLIGATED FUNDS ON CLIN 005 IS INCREASED BY $3,250.00 FROM $4,224,683.00 TO $4,227,933.00. 3. THE TOTAL AMOUNT OF OBLIGATED FUNDS ON THE A

P00006 - EXERCISE OY1

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $200,000.00, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $6,136,944.84 TO $6,336,944.84. 2. UPDATE TO CLIN 00005 HYBRID OCC/HR STATEMENT OF WORK. 3. REVISE CLIN 00044 GC-72/NE-

P00005 - INCREMENTAL FUNDING

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $2,438,029.60 INCREASING THE OBLIGATED AMOUNT FROM $21,290,937.64 TO $23,728,967.24. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

P00004 - DEOB $445,000.00 FROM CLIN 00003 & KEY PERSONNEL CHANGE.

P00003 - REARRANGE THE CEILING, ADD INCREMENTAL FUNDING, AND ADD ALLEY MATTRO AS THE ALT. COR.

ONE ACQUISITION SOLUTION FOR INTEGRATED SERVICES PLUS (OASIS+) SMALL BUSINESS MULTIPLE AGENCY CONTRACT (MAC)

FULL TERMINATION FOR CONVENIENCE.

THIS MODIFICATION IS TO ADD ADDITIONAL ACTIVITIES UNDER THE CURRENT SCOPE OF WORK AND TO ADD FUNDING TO THE AWARD FOR THE ACTIVITIES IN THE AMOUNT OF $250,000. THIS AWARD: 1. ADD ADDITIONAL ACTIVITIES UNDER THE SCOPE OF WORK. 2. OBLIGATES $

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $222,360.00, INCREASING THE OBLIGATED AMOUNT FROM $21,068,577.64 TO $21,290,937.64. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

ONE ACQUISITION SOLUTION FOR INTEGRATED SERVICES PLUS (OASIS+) UNRESTRICTED MULTIPLE AGENCY CONTRACT (MAC)

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $200,000.00, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $5,936,944.84 TO $6,136,944.84. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

P00002 - ADD INCREMENTAL FUNDING TO THE BASE YEAR AND INCORPORATE OTSS PWS REVISED OCT 2024 AS ATTACHMENT 6.

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $1,054,371.00, INCREASING THE OBLIGATED AMOUNT FROM $20,014,206.64 TO $21,068,577.64. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

TECHNICAL WRITING SUPPORT FOR CHIPS METROLOGY PROGRAM.

ONE ACQUISITION SOLUTION FOR INTEGRATED SERVICES PLUS (OASIS+) WOMEN OWNED SMALL BUSINESS MULTIPLE AGENCY CONTRACT (MAC)

THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $9,627.58 FOR INVOICE DISCOUNTS TO REALIGN THE DISCOUNTS RECEIVED ON INVOICES IN THE STARS SYSTEMS WITH THE STRIPES SYSTEM THROUGH SEPTEMBER 30, 2024 ON CLIN 004. THIS MODIFICATION: 1. DEOBLIGA

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $72,815.53, INCREASING THE OBLIGATED AMOUNT FROM $19,941,391.11 TO $20,014,206.64. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. DE-OBLIGATE ($39,445.52) ON CLIN 00001 FOR INVOICE DISCOUNTS TAKEN, DECREASING THE OBLIGATED AMOUNT ON CLIN 00001 FROM $19,933,976.63 TO $19,894,531.11 AND THE TOTAL OBLIGATED AMOUNT FROM $19,980,836.63 TO

THIS MODIFICATION IS TO: 1. OBLIGATES INCREMENTAL FUNDING IN THE AMOUNT OF $2,565,139. 2. THE AMOUNT OF OBLIGATED FUNDS ON CLIN 005 IS INCREASED BY $2,565,139 FROM $1,409,544 TO $3,974,683. 3. THE TOTAL AMOUNT OF OBLIGATED FUNDS ON THE AWAR

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING OF $225,000.00 TO CLIN 00010, INCREASING THE OBLIGATED AMOUNT FROM $11,791.37 TO $236,791.37. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. DE-OBLIGATE $4,921.22 FOR INVOICE DISCOUNTS TAKEN, DECREASING THE TOTAL OBLIGATE AMOUNT FROM $5,716,866.06 TO $5,711,944.84. THIS DE-OBLIGATION OF FUNDS IS TO REALIGN THE DISCOUNTS RECEIVED ON INVOICES IN

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $740,000.00, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $19,240,836.63 TO $19,980,836.63. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED..

THE PURPOSE OF THIS MODIFICATION IS TO: 1. EXERCISE OPTION 4 (YEAR 5) AND ALL OPTION 4 CLINS. 2. ADD INCREMENTAL FUNDING OF $729,480.00, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $4,987,386.06 TO $5,716,866.06. ALL OTHER TERMS AND CONDITIONS REM

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $2,178,504.89, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $17,062,331.74 TO $19,240,836.63. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

P00001 - ADD INCREMENTAL FUNDING TO THE BASE YEAR, ADD IN CLAUSES FAR 52.243-3 AND DOE-G-2001, AND INCORPORATE OTSS PWS REVISED AUG 2024 AS ATTACHMENT 5.

THE PURPOSE OF THIS MODIFICATION IS TO: ADD INCREMENTAL FUNDING TO CLIN 00001 IN THE AMOUNT OF $956,432.87, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $16,105,898.87 TO $17,062,331.74. ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

THE PURPOSE OF THIS MODIFICATION IS TO: 1. ADD INCREMENTAL FUNDING TO CLIN 00001 OF $1,462,619.03, INCREASING THE TOTAL OBLIGATED AMOUNT FROM $14,643,279.84 TO $16,105,898.87. 2. DE-OBLIGATE EXPIRING FY23 FUNDS OF $342,326.97. ALL OTHER TERMS AND

OPERATIONAL AND TECHNICAL SUPPORT SERVICES (OTSS) FOR THE DEPARTMENT OF ENERGY'S (DOE) GRID DEPLOYMENT OFFICE (GDO) UTILIZING THE TECHNICAL, ENGINEERING, AND PROGRAMMATIC SERVICES III (TEPS III) BLANKET PURCHASE AGREEMENT (BPA).

THE PURPOSE OF THIS MODIFICATION IS TO: 1. OBLIGATE $159.18 IN INVOICE CREDITS AND ADD INCREMENTAL FUNDING IN THE AMOUNT OF $335,799.97 TO CLIN 00001 INCREASING THE OBLIGATED AMOUNT ON CLIN 00001 BY $335,959.15 FROM $14,260,460.69 TO $14,596,419.84

THE PURPOSE OF THIS MODIFICATION IS TO: 1. DE-OBLIGATE $159.18 IN INVOICE CREDITS TAKEN, DECREASING THE TOTAL OBLIGATED AMOUNT FROM $14,307,479.87 TO $14,307,320.69. THIS DE-OBLIGATION OF FUNDS IS TO REALIGN THE DISCOUNTS RECEIVED ON INVOICES IN TH