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Person · CIK 1850596

Chantelle Yvette Breithaupt

Senior Vice President at Arista Networks; director at Ambarella

Earlier: Aspen Technology and ASPENTECH

Source: Forms 3, 4, 5 and 144 on SEC EDGAR

Sold on Form 4$2.1M
Noticed on Form 144$2.6M
Bought on Form 4$0
Companies4

Holdings now

As reported after the latest Form 3, 4 or 5 at each company.

How these figures work

Options and RSUs are from the latest filing that lists them; earlier grants may also be held. Holdings can be out of date when a person stops filing.

CompanySecurityHeldShares or unitsAs of
Arista Networks ANETCommon StockDirectly68,697Oct 6, 2026 · Filing · EDGAR
Arista Networks ANETRestricted Stock Unit-1
into Common Stock
Directly65,504Aug 20, 2026 · Filing · EDGAR
Arista Networks ANETRestricted Stock Unit-2
into Common Stock
Directly17,550Aug 20, 2026 · Filing · EDGAR
Ambarella AMBAOrdinary SharesDirectly8,091Sep 8, 2026 · Filing · EDGAR
Aspen TechnologyCommon StockDirectly31,518Dec 29, 2023 · Filing · EDGAR
Aspen TechnologyEmployee Stock Option (Right to Buy)
exercise $210.60, expires Aug 31, 2032, into Common Stock
Directly15,108Sep 1, 2022 · Filing · EDGAR

Sold and noticed by quarter

Chantelle Yvette Breithaupt: dollars sold on Form 4 and noticed on Form 144 per quarter, Q1 2024 to Q4 2026$1.8M$0Q1 2024: $470K noticed on Form 144Q1 2024: $0 sold on Form 4Q2 2024: $0 noticed on Form 144Q2 2024: $0 sold on Form 4Q3 2024: $0 noticed on Form 144Q3 2024: $0 sold on Form 4Q4 2024: $0 noticed on Form 144Q4 2024: $0 sold on Form 4Q1 2025: $0 noticed on Form 144Q1 2025: $0 sold on Form 4Q2 2025: $0 noticed on Form 144Q2 2025: $0 sold on Form 4Q3 2025: $0 noticed on Form 144Q3 2025: $0 sold on Form 4Q4 2025: $0 noticed on Form 144Q4 2025: $0 sold on Form 4Q1 2026: $0 noticed on Form 144Q1 2026: $0 sold on Form 4Q2 2026: $1.7M noticed on Form 144Q2 2026: $1.8M sold on Form 4Q3 2026: $120K noticed on Form 144Q3 2026: $120K sold on Form 4Q4 2026: $253K noticed on Form 144Q4 2026: $263K sold on Form 4Q1 2024Q4 2024Q3 2025Q2 2026

Sold (Form 4) Noticed (Form 144) Bought (Form 4)

Quarterly totals as a table
QuarterSold (Form 4)Noticed (Form 144)
Q4 2026$263K$253K
Q3 2026$120K$120K
Q2 2026$1.8M$1.7M
Q1 2024—$470K

Planned sales (Form 144) and the sales that followed

Each Form 144 notice of a planned sale, grouped by broker and 10b5-1 plan, with the Form 4 sales we matched to it.

How we match

A Form 144 is a notice of a planned sale by an affiliate. SEC Tracker matches each notice to Form 4 sales by the same person at the same company within 90 days of the notice, up to the shares noticed. The match is our inference, not something either filing states.

Notice dateNoticedPlanned saleOutcomeLinks
Arista Networks ANET · Morgan Stanley Smith Barney · 10b5-1 plan adopted Jun 2, 2026 · 2 notices
Oct 6, 20261,224 · ~$253KOct 6, 2026Sold as noticed Sold 1,224 at $215.00 on Oct 6 · $263K Form 4Filing · EDGAR
Sep 1, 2026612 · ~$120KSep 1, 2026Sold as noticed Sold 612 at $195.77 on Sep 1 · $120K Form 4Filing · EDGAR
Arista Networks ANET · Morgan Stanley Smith Barney · 10b5-1 plan adopted Dec 11, 2025 · 2 notices
May 26, 20262,448 · ~$377KMay 26, 2026Sold as noticed Sold 2,448 at $157.00 on May 26 · $384K Form 4Filing · EDGAR
Apr 14, 20268,890 · ~$1.4MApr 14, 2026Sold as noticed Sold 8,890 at $155.02 on Apr 14 · $1.4M Form 4Filing · EDGAR
Aspen Technology · Fidelity Brokerage Services · No 10b5-1 plan stated · 1 notice
Feb 26, 20242,558 · ~$470KFeb 26, 2024Not sold within 90 daysFiling · EDGAR

Every transaction, by company

Each Form 3, 4 and 5 transaction in plain words, newest first.

How these figures work

Values are shares times the price each filing states; grants, exercises and gifts usually state no price. Held after is what the filing reports was held once the transaction was done, directly or through the named holder.

Arista Networks ANET Senior Vice President, CFO · filings 2024 to 2026 · sold $2.1M · $2.1M noticed on Form 144

DateTransactionSharesPriceValueHeld afterSource
Oct 6, 2026Sale under a 10b5-1 plan−1,224$215.00$263K68,697 directFiling · EDGAR
Sep 1, 2026Sale under a 10b5-1 plan−612$195.77$120K69,921 directFiling · EDGAR
Aug 20, 2026Option or RSU exercised or converted+10,92075,328 directFiling · EDGAR
Aug 20, 2026Option or RSU exercised or converted+1,35076,678 directFiling · EDGAR
Aug 20, 2026Shares withheld for tax or exercise price−6,145$186.45$1.1M70,533 directFiling · EDGAR
Aug 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-1
−10,92065,504 directFiling · EDGAR
Aug 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-2
−1,35017,550 directFiling · EDGAR
May 26, 2026Sale under a 10b5-1 plan−2,448$157.00$384K64,408 directFiling · EDGAR
May 20, 2026Option or RSU exercised or converted+10,91671,650 directFiling · EDGAR
May 20, 2026Option or RSU exercised or converted+1,35073,000 directFiling · EDGAR
May 20, 2026Shares withheld for tax or exercise price−6,144$141.58$870K66,856 directFiling · EDGAR
May 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-1
−10,91676,424 directFiling · EDGAR
May 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-2
−1,35018,900 directFiling · EDGAR
Apr 14, 2026Sale under a 10b5-1 plan−8,890$155.02$1.4M60,734 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted+10,92058,315 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted+15,86474,179 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted+1,35075,529 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted+14,40089,929 directFiling · EDGAR
Feb 20, 2026Shares withheld for tax or exercise price−20,305$137.23$2.8M69,624 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-1
−10,92087,340 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-2
−1,35020,250 directFiling · EDGAR
Feb 20, 2026Grant or award from the company
Restricted Stock Unit-3
+15,86415,864 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-3
−15,8640 directFiling · EDGAR
Feb 20, 2026Grant or award from the company
Restricted Stock Unit-7
+14,40014,400 directFiling · EDGAR
Feb 20, 2026Option or RSU exercised or converted
Restricted Stock Unit-7
−14,4000 directFiling · EDGAR
Feb 13, 2026Grant or award from the company
Restricted Stock Unit-6
+19,17019,170 directFiling · EDGAR
Nov 20, 2025Option or RSU exercised or converted+10,91652,852 directFiling · EDGAR
Nov 20, 2025Shares withheld for tax or exercise price−5,457$124.81$681K47,395 directFiling · EDGAR
Nov 20, 2025Option or RSU exercised or converted
Restricted Stock Unit-1
−10,91698,260 directFiling · EDGAR
Aug 20, 2025Option or RSU exercised or converted+10,92047,391 directFiling · EDGAR
Aug 20, 2025Shares withheld for tax or exercise price−5,455$132.78$724K41,936 directFiling · EDGAR
Aug 20, 2025Option or RSU exercised or converted
Restricted Stock Unit-1
−10,920109,176 directFiling · EDGAR
May 20, 2025Option or RSU exercised or converted+10,91641,949 directFiling · EDGAR
May 20, 2025Shares withheld for tax or exercise price−5,478$96.70$530K36,471 directFiling · EDGAR
May 20, 2025Option or RSU exercised or converted
Restricted Stock Unit-1
−10,916120,096 directFiling · EDGAR
May 9, 2025Grant or award from the company
Restricted Stock Unit-4
+31,08031,080 directFiling · EDGAR
Feb 20, 2025Option or RSU exercised or converted+43,66843,668 directFiling · EDGAR
Feb 20, 2025Option or RSU exercised or converted+15,85659,524 directFiling · EDGAR
Feb 20, 2025Shares withheld for tax or exercise price−28,491$103.92$3M31,033 directFiling · EDGAR
Feb 20, 2025Option or RSU exercised or converted
Restricted Stock Unit-1
−43,668131,012 directFiling · EDGAR
Feb 20, 2025Grant or award from the company
Restricted Stock Unit-3
+15,85615,856 directFiling · EDGAR
Feb 20, 2025Option or RSU exercised or converted
Restricted Stock Unit-3
−15,8560 directFiling · EDGAR
Feb 14, 2025Grant or award from the company
Restricted Stock Unit-2
+21,60021,600 directFiling · EDGAR

Ambarella AMBA Director · filings 2025 to 2026

DateTransactionSharesPriceValueHeld afterSource
Sep 8, 2026Grant or award from the company+3,1518,091 directFiling · EDGAR
Sep 2, 2025Grant or award from the company+2,4984,940 directFiling · EDGAR

Aspen Technology SVP, Chief Financial Officer · filings 2022 to 2024 · $470K noticed on Form 144

DateTransactionSharesPriceValueHeld afterSource
Dec 29, 2023Shares withheld for tax or exercise price−1,088$220.62$240K31,518 directFiling · EDGAR
Nov 1, 2023Shares withheld for tax or exercise price−1,335$177.75$237K32,606 directFiling · EDGAR
Sep 29, 2023Shares withheld for tax or exercise price−1,056$205.08$217K33,941 directFiling · EDGAR
Sep 1, 2023Grant or award from the company+7,82234,997 directFiling · EDGAR
Jun 30, 2023Shares withheld for tax or exercise price−529$165.12$87K27,175 directFiling · EDGAR
Mar 31, 2023Shares withheld for tax or exercise price−528$217.78$115K27,704 directFiling · EDGAR
Dec 30, 2022Shares withheld for tax or exercise price−797$205.62$164K28,232 directFiling · EDGAR
Sep 30, 2022Shares withheld for tax or exercise price−860$234.08$201K29,029 directFiling · EDGAR
Sep 1, 2022Grant or award from the company+9,10129,889 directFiling · EDGAR
Sep 1, 2022Grant or award from the company
Employee Stock Option (Right to Buy)
+15,108$210.60$3.2M15,108 directFiling · EDGAR
Jun 30, 2022Shares withheld for tax or exercise price−425$194.03$82K20,788 directFiling · EDGAR
May 23, 2022Grant or award from the company+19,41421,560 directFiling · EDGAR
May 23, 2022Shares withheld for tax or exercise price−347$186.03$65K21,213 directFiling · EDGAR
May 23, 2022Grant or award from the company
Employee Stock Option (Right to Buy)
+18,93918,939 directFiling · EDGAR
May 23, 2022Grant or award from the company
Common Stock Option (Right to Buy)
+19,51319,513 directFiling · EDGAR

ASPENTECH SVP, Chief Financial Officer · filings 2021 to 2022

DateTransactionSharesPriceValueHeld afterSource
May 16, 2022Returned to the company−5,11021,789 directFiling · EDGAR
May 16, 2022Returned to the company−21,7890 directFiling · EDGAR
May 16, 2022Returned to the company
Employee Stock Option (Right to Buy)
−21,2570 directFiling · EDGAR
May 16, 2022Returned to the company
Common Stock Option (Right to Buy)
−21,9010 directFiling · EDGAR
Mar 31, 2022Shares withheld for tax or exercise price−476$163.79$78K26,899 directFiling · EDGAR
Dec 30, 2021Shares withheld for tax or exercise price−630$151.11$95K27,375 directFiling · EDGAR
Oct 10, 2021Grant or award from the company+4,50428,005 directFiling · EDGAR
Sep 30, 2021Shares withheld for tax or exercise price−477$124.90$60K23,501 directFiling · EDGAR
Sep 1, 2021Grant or award from the company+11,79523,978 directFiling · EDGAR
Sep 1, 2021Grant or award from the company
Common Stock Option (Right to Buy)
+21,901$129.50$2.8M21,901 directFiling · EDGAR
Jun 30, 2021Shares withheld for tax or exercise price−222$140.52$31K12,183 directFiling · EDGAR
Mar 22, 2021Grant or award from the company+10,26510,265 directFiling · EDGAR
Mar 22, 2021Grant or award from the company+3,36013,625 directFiling · EDGAR
Mar 22, 2021Shares withheld for tax or exercise price−1,220$148.82$182K12,405 directFiling · EDGAR
Mar 22, 2021Grant or award from the company
Employee Stock Option (Right to Buy)
+21,257$148.82$3.2M21,257 directFiling · EDGAR
All 44 Forms 3, 4, 5 and 144
FiledFormCompanyLinks
Oct 8, 2026Form 4Arista Networks ANETFiling · EDGAR
Oct 6, 2026Form 144Arista Networks ANETFiling · EDGAR
Sep 10, 2026Form 4Ambarella AMBAFiling · EDGAR
Sep 3, 2026Form 4Arista Networks ANETFiling · EDGAR
Sep 1, 2026Form 144Arista Networks ANETFiling · EDGAR
Aug 24, 2026Form 4Arista Networks ANETFiling · EDGAR
May 28, 2026Form 4Arista Networks ANETFiling · EDGAR
May 26, 2026Form 144Arista Networks ANETFiling · EDGAR
May 22, 2026Form 4Arista Networks ANETFiling · EDGAR
Apr 16, 2026Form 4Arista Networks ANETFiling · EDGAR
Apr 14, 2026Form 144Arista Networks ANETFiling · EDGAR
Feb 24, 2026Form 4Arista Networks ANETFiling · EDGAR
Feb 17, 2026Form 4Arista Networks ANETFiling · EDGAR
Nov 24, 2025Form 4Arista Networks ANETFiling · EDGAR
Sep 4, 2025Form 4Ambarella AMBAFiling · EDGAR
Aug 22, 2025Form 4Arista Networks ANETFiling · EDGAR
May 22, 2025Form 4Arista Networks ANETFiling · EDGAR
May 13, 2025Form 4Arista Networks ANETFiling · EDGAR
Mar 4, 2025Form 3Ambarella AMBAFiling · EDGAR
Feb 24, 2025Form 4Arista Networks ANETFiling · EDGAR
Feb 18, 2025Form 4Arista Networks ANETFiling · EDGAR
Feb 26, 2024Form 144Aspen TechnologyFiling · EDGAR
Feb 21, 2024Form 3Arista Networks ANETFiling · EDGAR
Jan 3, 2024Form 4Aspen TechnologyFiling · EDGAR
Nov 3, 2023Form 4Aspen TechnologyFiling · EDGAR
Oct 3, 2023Form 4Aspen TechnologyFiling · EDGAR
Sep 6, 2023Form 4Aspen TechnologyFiling · EDGAR
Jul 5, 2023Form 4Aspen TechnologyFiling · EDGAR
Apr 4, 2023Form 4Aspen TechnologyFiling · EDGAR
Jan 4, 2023Form 4Aspen TechnologyFiling · EDGAR
Oct 4, 2022Form 4Aspen TechnologyFiling · EDGAR
Sep 6, 2022Form 4Aspen TechnologyFiling · EDGAR
Jul 5, 2022Form 4Aspen TechnologyFiling · EDGAR
May 25, 2022Form 4Aspen TechnologyFiling · EDGAR
May 18, 2022Form 4ASPENTECHFiling · EDGAR
May 17, 2022Form 3Aspen TechnologyFiling · EDGAR
Apr 4, 2022Form 4ASPENTECHFiling · EDGAR
Jan 4, 2022Form 4ASPENTECHFiling · EDGAR
Oct 13, 2021Form 4ASPENTECHFiling · EDGAR
Oct 4, 2021Form 4ASPENTECHFiling · EDGAR
Sep 3, 2021Form 4ASPENTECHFiling · EDGAR
Jul 2, 2021Form 4ASPENTECHFiling · EDGAR
Mar 24, 2021Form 4ASPENTECHFiling · EDGAR
Mar 24, 2021Form 3ASPENTECHFiling · EDGAR

Every figure is as filed with the SEC on Forms 3, 4, 5 and 144. Holdings are the amounts reported after each person's latest filing at each company and can be out of date. Matching a Form 144 notice to Form 4 sales is SEC Tracker's inference from owner, company, dates and share counts, not something the filings state. Not investment advice. Not affiliated with the U.S. SEC.

Data on this page was fetched . The filing on SEC.gov is the record.