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Insider · CIK 0001464912

ValueAct Capital Master Fund, L.P.

CIK 0001464912 Name as filed on the most recent filing

Filed as ValueAct Capital Master Fund, L.P. (282)

741 transaction lines · from 282 filings · filed 2009-06-04 to 2025-12-08 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-25 05:24 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

0 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-25 05:24 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2019-11-13 P, Open-market purchase Trinity Industries IncTRN 5,039,104, acquired Open Form 4 filing 0001418812-19-000081
2019-11-12 P, Open-market purchase Trinity Industries IncTRN 6,279,120, acquired Open Form 4 filing 0001418812-19-000081
2019-11-11 P, Open-market purchase Trinity Industries IncTRN 3,229,500, acquired Open Form 4 filing 0001418812-19-000081
2019-11-01 P, Open-market purchase Trinity Industries IncTRN 8,184,000, acquired Open Form 4 filing 0001418812-19-000079
2019-10-31 P, Open-market purchase Trinity Industries IncTRN 12,824,500, acquired Open Form 4 filing 0001418812-19-000079
2019-10-30 P, Open-market purchase Trinity Industries IncTRN 11,904,000, acquired Open Form 4 filing 0001418812-19-000079
2019-10-29 S, Open-market sale Alliance Data Systems CorpADS 186,660,000, disposed Open Form 4 filing 0001418812-19-000075
2019-10-28 S, Open-market sale Alliance Data Systems CorpADS 203,000,000, disposed Open Form 4 filing 0001418812-19-000075
2019-09-12 S, Open-market sale Cbre Group, Inc.CBRE 161,580,000, disposed Open Form 4 filing 0001418812-19-000064
2019-07-31 P, Open-market purchase Trinity Industries IncTRN 2,158,513, acquired Open Form 4 filing 0001418812-19-000046
2019-07-30 P, Open-market purchase Trinity Industries IncTRN 5,826,000, acquired Open Form 4 filing 0001418812-19-000046
2019-07-29 P, Open-market purchase Trinity Industries IncTRN 4,702,500, acquired Open Form 4 filing 0001418812-19-000046
2019-06-21 S, Open-market sale Armstrong Flooring, Inc.AFI 37,739,168, disposed Open Form 4 filing 0001418812-19-000042
2019-06-12 S, Open-market sale Arcosa, Inc.ACA 54,045,000, disposed Open Form 4 filing 0001418812-19-000038
2019-05-01 S, Open-market sale Armstrong World Industries IncAWI 5,552,501, disposed Open Form 4 filing 0001418812-19-000024
2019-03-12 S, Open-market sale Arcosa, Inc.ACA 46,062,900, disposed Open Form 4 filing 0001418812-19-000017
2019-03-11 S, Open-market sale Cbre Group, Inc.CBRE 331,717,000, disposed Open Form 4 filing 0001418812-19-000012
2019-03-11 S, Open-market sale Armstrong World Industries IncAWI 33,402,000, disposed Open Form 4 filing 0001418812-19-000013
2019-02-27 S, Open-market sale Armstrong World Industries IncAWI 127,115,250, disposed Open Form 4 filing 0001418812-19-000009
2019-02-08 P, Open-market purchase Seagate Technology plcSTX 32,335,000, acquired Open Form 4 filing 0001418812-19-000005
2019-02-07 P, Open-market purchase Seagate Technology plcSTX 33,315,000, acquired Open Form 4 filing 0001418812-19-000005
2019-02-06 P, Open-market purchase Seagate Technology plcSTX 34,260,000, acquired Open Form 4 filing 0001418812-19-000005
2018-12-13 P, Open-market purchase Trinity Industries IncTRN 1,298,519, acquired Open Form 4 filing 0001418812-18-000115
2018-12-10 P, Open-market purchase Trinity Industries IncTRN 3,285,000, acquired Open Form 4 filing 0001418812-18-000112
2018-12-07 P, Open-market purchase Seagate Technology plcSTX 10,964,538, acquired Open Form 4 filing 0001418812-18-000111
2018-12-07 P, Open-market purchase Trinity Industries IncTRN 211,346, acquired Open Form 4 filing 0001418812-18-000112
2018-12-06 P, Open-market purchase Seagate Technology plcSTX 5,279,763, acquired Open Form 4 filing 0001418812-18-000111
2018-12-06 P, Open-market purchase Trinity Industries IncTRN 2,650,018, acquired Open Form 4 filing 0001418812-18-000112
2018-11-30 P, Open-market purchase Seagate Technology plcSTX 3,842,333, acquired Open Form 4 filing 0001418812-18-000110
2018-11-29 S, Open-market sale Alliance Data Systems CorpADS 14,832,000, disposed Open Form 4 filing 0001418812-18-000109
2018-11-28 P, Open-market purchase Seagate Technology plcSTX 1,365,179, acquired Open Form 4 filing 0001418812-18-000110
2018-11-28 S, Open-market sale Alliance Data Systems CorpADS 24,887,500, disposed Open Form 4 filing 0001418812-18-000109
2018-11-23 P, Open-market purchase Seagate Technology plcSTX 227,376, acquired Open Form 4 filing 0000904454-18-000773
2018-11-23 P, Open-market purchase Trinity Industries IncTRN 193,336, acquired Open Form 4 filing 0000904454-18-000771
2018-11-20 P, Open-market purchase Seagate Technology plcSTX 15,299,675, acquired Open Form 4 filing 0000904454-18-000773
2018-11-20 P, Open-market purchase Trinity Industries IncTRN 3,157,236, acquired Open Form 4 filing 0000904454-18-000771
2018-11-09 S, Open-market sale Armstrong World Industries IncAWI 203,087,000, disposed Open Form 4 filing 0001418812-18-000098
2018-11-06 S, Open-market sale Alliance Data Systems CorpADS 135,000,000, disposed Open Form 4 filing 0001418812-18-000092
2018-08-31 S, Open-market sale Armstrong World Industries IncAWI 7,003,000, disposed Open Form 4 filing 0001418812-18-000084
2018-08-21 S, Open-market sale Armstrong World Industries IncAWI 2,103,300, disposed Open Form 4 filing 0001418812-18-000083
2018-08-17 P, Open-market purchase Seagate Technology plcSTX 1,228,440, acquired Open Form 4 filing 0001418812-18-000082
2018-08-16 P, Open-market purchase Seagate Technology plcSTX 9,639,746, acquired Open Form 4 filing 0001418812-18-000081
2018-08-15 P, Open-market purchase Seagate Technology plcSTX 26,390,000, acquired Open Form 4 filing 0001418812-18-000081
2018-08-14 P, Open-market purchase Seagate Technology plcSTX 13,195,000, acquired Open Form 4 filing 0001418812-18-000081
2018-08-13 P, Open-market purchase Seagate Technology plcSTX 26,040,136, acquired Open Form 4 filing 0001418812-18-000074
2018-08-10 P, Open-market purchase Seagate Technology plcSTX 50,610,000, acquired Open Form 4 filing 0001418812-18-000074
2018-08-09 P, Open-market purchase Seagate Technology plcSTX 29,855,106, acquired Open Form 4 filing 0001418812-18-000074
2018-08-07 S, Open-market sale Armstrong World Industries IncAWI 103,800,000, disposed Open Form 4 filing 0001418812-18-000073
2018-08-02 P, Open-market purchase Seagate Technology plcSTX 6,608,750, acquired Open Form 4 filing 0001418812-18-000068
2018-08-01 P, Open-market purchase Seagate Technology plcSTX 16,993,740, acquired Open Form 4 filing 0001418812-18-000068

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Search the catalog
Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4, totalled to the dollar. Share counts, the price per share and the full list of reporting owners are on each filing's own page, which every row here opens.

What this insider's stored lines contain

No transaction line is stored for this entity, so there is nothing to break down by code. The catalog holds its filings; what it does not hold is a single reportable line from them, which is a fact about the parse and about these filings, not about the entity.

How to cite this page

ebomi catalog. ValueAct Capital Master Fund, L.P., insider transactions. Retrieved 2026-08-26 from https://ebomi.com/insider/0001464912

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

This page as JSON The JSON twin is shaped by the same read model as this page, so the two cannot disagree. Its envelope carries the canonical URL, the retrieval time, the coverage claim, and the licence statement.