Robin Tomasello

Insider · Chief Accounting Officer · S

Robin Tomasello files insider transactions with the SEC as a chief accounting officer of SentinelOne. We hold 7 disclosed purchases and sales filed since 2 October 2014, 2 of them in the last 90 days.

Files for 2 companiesS, CHGG
Disclosed buys and sells7 in all, 2 in the last 90 days
Last disclosure9 September 2026

Positions held

2 posts we hold — a term names its own dates; a run of filings only says when they filed

Filed 10 December 2021 — 8 September 2026Chief Accounting Officer · SentinelOne 39 Form 4 lines · source: SEC Form 4
Filed 1 October 2014 — 12 October 2021VP, Corporate Controller · Chegg 68 Form 4 lines · source: SEC Form 4

Every transaction

107 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing

Sort byOpen-market trades only107 of 107 shown


8 Sep 2026	9 Sep 2026SEC Form 4	1 d	sold on the open market	SentinelOne	7,235 shares	up +0.1%	up +0.0%
8 Sep 2026	9 Sep 2026SEC Form 4	1 d	sold on the open market	SentinelOne	14,205 shares	up +0.1%	up +0.0%
6 Aug 2026	7 Aug 2026SEC Form 4	1 d	sold on the open market	SentinelOne	5,467 shares	down −6.4%	down −9.2%
8 Jun 2026	10 Jun 2026SEC Form 4	2 d	sold on the open market	SentinelOne	11,905 shares	up +23.4%	up +31.4%
6 May 2026	8 May 2026SEC Form 4	2 d	sold on the open market	SentinelOne	2,459 shares	up +26.8%	up +17.2%
15 Apr 2026	17 Apr 2026SEC Form 4	2 d	was grantednot a trade	SentinelOne	56,171 shares	up +46.6%	up +38.7%
25 Mar 2026	25 Mar 2026SEC Form 4	0 d	sold on the open market	SentinelOne	1,496 shares	up +45.5%	up +45.5%
25 Mar 2026	25 Mar 2026SEC Form 4	0 d	sold on the open market	SentinelOne	1,496 shares	up +45.5%	up +45.5%
23 Mar 2026	25 Mar 2026SEC Form 4	2 d	was grantednot a trade	SentinelOne	4,148 shares	up +35.2%	up +45.5%
23 Mar 2026	25 Mar 2026SEC Form 4	2 d	was grantednot a trade	SentinelOne	4,148 shares	up +35.2%	up +45.5%
6 Mar 2026	10 Mar 2026SEC Form 4	4 d	sold on the open market	SentinelOne	10,163 shares	up +37.0%	up +37.5%
6 Mar 2026	10 Mar 2026SEC Form 4	4 d	sold on the open market	SentinelOne	10,163 shares	up +37.0%	up +37.5%
6 Feb 2026	6 Feb 2026SEC Form 4	0 d	sold on the open market	SentinelOne	2,975 shares	up +47.0%	up +47.0%
6 Feb 2026	6 Feb 2026SEC Form 4	0 d	sold on the open market	SentinelOne	2,975 shares	up +47.0%	up +47.0%
15 Dec 2025	17 Dec 2025SEC Form 4	2 d	was grantednot a trade	SentinelOne	127,084 shares	up +31.0%	up +34.3%
8 Dec 2025	10 Dec 2025SEC Form 4	2 d	sold on the open market	SentinelOne	8,509 shares	up +30.6%	up +27.6%
6 Nov 2025	7 Nov 2025SEC Form 4	1 d	sold on the open market	SentinelOne	3,476 shares	up +18.8%	up +14.9%
8 Sep 2025	9 Sep 2025SEC Form 4	1 d	sold on the open market	SentinelOne	8,508 shares	up +5.5%	up +8.1%
6 Aug 2025	7 Aug 2025SEC Form 4	1 d	sold on the open market	SentinelOne	2,921 shares	up +12.3%	up +16.6%
6 Jun 2025	10 Jun 2025SEC Form 4	4 d	sold on the open market	SentinelOne	5,996 shares	up +5.9%	up +7.0%
15 Apr 2025	17 Apr 2025SEC Form 4	2 d	was grantednot a trade	SentinelOne	81,103 shares	up +11.9%	up +15.6%
27 Mar 2025	28 Mar 2025SEC Form 4	1 d	sold on the open market	SentinelOne	1,496 shares	up +0.5%	up +3.2%
21 Mar 2025	25 Mar 2025SEC Form 4	4 d	exercised options overnot a trade	SentinelOnederivative	4,295 shares	up +0.9%	down −3.7%
21 Mar 2025	25 Mar 2025SEC Form 4	4 d	exercised options overnot a trade	SentinelOne	4,295 shares	up +0.9%	down −3.7%
6 Mar 2025	7 Mar 2025SEC Form 4	1 d	sold on the open market	SentinelOne	6,378 shares	down −2.3%	down −2.0%
6 Dec 2024	10 Dec 2024SEC Form 4	4 d	sold on the open market	SentinelOne	8,440 shares	down −24.6%	down −17.7%
16 Sep 2024	17 Sep 2024SEC Form 4	1 d	was grantednot a trade	SentinelOne	42,713 shares	down −16.2%	down −22.0%
6 Sep 2024	10 Sep 2024SEC Form 4	4 d	sold on the open market	SentinelOne	5,022 shares	down −11.7%	down −10.2%
6 Jun 2024	7 Jun 2024SEC Form 4	1 d	sold on the open market	SentinelOne	5,022 shares	up +12.8%	up +13.2%
6 Mar 2024	8 Mar 2024SEC Form 4	2 d	sold on the open market	SentinelOne	4,001 shares	down −27.4%	down −29.2%
15 Feb 2024	16 Feb 2024SEC Form 4	1 d	was grantednot a trade	SentinelOne	54,706 shares	down −35.2%	down −34.1%
6 Dec 2023	8 Dec 2023SEC Form 4	2 d	sold on the open market	SentinelOne	3,679 shares	down −16.6%	down −19.0%
6 Sep 2023	7 Sep 2023SEC Form 4	1 d	sold on the open market	SentinelOne	3,735 shares	up +12.2%	up +14.1%
6 Jun 2023	7 Jun 2023SEC Form 4	1 d	sold on the open market	SentinelOne	3,793 shares	up +42.0%	up +42.1%
6 Mar 2023	7 Mar 2023SEC Form 4	1 d	sold on the open market	SentinelOne	1,744 shares	up +20.4%	up +24.5%
15 Feb 2023	17 Feb 2023SEC Form 4	2 d	was grantednot a trade	SentinelOne	92,819 shares	up +12.8%	up +22.0%
6 Dec 2022	8 Dec 2022SEC Form 4	2 d	sold on the open market	SentinelOne	6,669 shares	up +37.9%	up +27.6%
7 Feb 2022	8 Dec 2022SEC Form 4	304 d	was grantednot a trade	SentinelOne	7,036 shares	down −55.5%	up +27.6%
10 Dec 2021	14 Dec 2021SEC Form 4	4 d	was grantednot a trade	SentinelOne	69,583 shares	down −61.4%	down −58.2%
12 Oct 2021	14 Oct 2021SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	166 shares	down −98.8%	down −98.8%
1 Sep 2021	3 Sep 2021SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	1,195 shares	down −99.1%	down −99.1%
12 Jul 2021	14 Jul 2021SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	661 shares	down −99.1%	down −99.1%
1 Jun 2021	3 Jun 2021SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	1,194 shares	down −99.0%	down −99.0%
1 Mar 2021	27 Apr 2021SEC Form 4	57 d	was grantednot a trade	Cheggderivative	14,587 shares	down −99.2%	down −99.2%
1 Mar 2021	3 Mar 2021SEC Form 4	2 d	was grantednot a trade	Chegg	10,095 shares	down −99.2%	down −99.2%
1 Mar 2021	3 Mar 2021SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	6,352 shares	down −99.2%	down −99.2%
1 Mar 2021	3 Mar 2021SEC Form 4	2 d	was grantednot a trade	Cheggderivative	an unstated number of shares	down −99.2%	down −99.2%
1 Dec 2020	3 Dec 2020SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	588 shares	down −99.0%	down −99.0%
20 Nov 2020	23 Nov 2020SEC Form 4	3 d	sold on the open market	Chegg	32,016 shares	down −98.9%	down −98.9%
1 Sep 2020	3 Sep 2020SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	589 shares	down −99.0%	down −98.9%
1 Jun 2020	3 Jun 2020SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	588 shares	down −98.8%	down −98.8%
1 Mar 2020	3 Mar 2020SEC Form 4	2 d	was grantednot a trade	Chegg	14,664 shares	down −98.1%	down −98.1%
1 Mar 2020	3 Mar 2020SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	13,584 shares	down −98.1%	down −98.1%
12 Dec 2019	13 Dec 2019SEC Form 4	1 d	sold on the open market	Chegg	4,877 shares	down −98.0%	down −98.0%
12 Dec 2019	13 Dec 2019SEC Form 4	1 d	sold on the open market	Chegg	4,529 shares	down −98.0%	down −98.0%
1 Apr 2019	2 Apr 2019SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	3,444 shares	down −98.0%	down −98.0%
1 Mar 2019	5 Mar 2019SEC Form 4	4 d	was grantednot a trade	Chegg	14,225 shares	down −98.1%	down −98.1%
1 Mar 2019	5 Mar 2019SEC Form 4	4 d	had shares withheld for taxnot a trade	Chegg	13,862 shares	down −98.1%	down −98.1%
23 Feb 2019	26 Feb 2019SEC Form 4	3 d	had shares withheld for taxnot a trade	Chegg	6,347 shares	down −98.1%	down −98.1%
1 Oct 2018	3 Oct 2018SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	507 shares	down −97.2%	down −97.4%
1 Jul 2018	3 Jul 2018SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	507 shares	down −97.3%	down −97.3%
1 Apr 2018	3 Apr 2018SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	3,950 shares	down −96.3%	down −96.2%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Cheggderivative	14,564 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Cheggderivative	2,777 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Cheggderivative	13,889 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Cheggderivative	2,636 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Cheggderivative	6,638 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Chegg	14,564 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Chegg	2,777 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Chegg	13,889 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Chegg	2,636 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	exercised options overnot a trade	Chegg	6,638 shares	down −96.4%	down −96.4%
16 Mar 2018	16 Mar 2018SEC Form 4	0 d	sold on the open market	Chegg	58,004 shares	down −96.4%	down −96.4%
15 Mar 2018	16 Mar 2018SEC Form 4	1 d	exercised options overnot a trade	Cheggderivative	14,800 shares	down −96.5%	down −96.4%
15 Mar 2018	16 Mar 2018SEC Form 4	1 d	exercised options overnot a trade	Chegg	14,800 shares	down −96.5%	down −96.4%
15 Mar 2018	16 Mar 2018SEC Form 4	1 d	sold on the open market	Chegg	43,677 shares	down −96.5%	down −96.4%
14 Mar 2018	16 Mar 2018SEC Form 4	2 d	sold on the open market	Chegg	37,268 shares	down −96.5%	down −96.4%
1 Mar 2018	2 Mar 2018SEC Form 4	1 d	was grantednot a trade	Chegg	29,187 shares	down −96.2%	down −96.4%
1 Mar 2018	2 Mar 2018SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	7,063 shares	down −96.2%	down −96.4%
23 Feb 2018	26 Feb 2018SEC Form 4	3 d	had shares withheld for taxnot a trade	Chegg	7,716 shares	down −96.3%	down −96.2%
1 Feb 2018	2 Feb 2018SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	2,041 shares	down −95.6%	down −95.6%
1 Jan 2018	3 Jan 2018SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	449 shares	down −95.4%	down −95.5%
1 Oct 2017	3 Oct 2017SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −94.9%	down −95.0%
1 Jul 2017	6 Jul 2017SEC Form 4	5 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −93.8%	down −93.7%
1 Apr 2017	4 Apr 2017SEC Form 4	3 d	had shares withheld for taxnot a trade	Chegg	2,994 shares	down −91.0%	down −91.0%
1 Mar 2017	2 Mar 2017SEC Form 4	1 d	was grantednot a trade	Chegg	61,274 shares	down −90.7%	down −90.6%
24 Feb 2017	28 Feb 2017SEC Form 4	4 d	had shares withheld for taxnot a trade	Chegg	1,930 shares	down −90.8%	down −90.4%
23 Feb 2017	24 Feb 2017SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	8,566 shares	down −90.9%	down −90.8%
1 Feb 2017	2 Feb 2017SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	2,215 shares	down −89.2%	down −89.0%
1 Jan 2017	4 Jan 2017SEC Form 4	3 d	had shares withheld for taxnot a trade	Chegg	447 shares	down −89.7%	down −89.9%
1 Oct 2016	5 Oct 2016SEC Form 4	4 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −89.3%	down −89.4%
1 Jul 2016	5 Jul 2016SEC Form 4	4 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −85.0%	down −84.5%
1 Apr 2016	5 Apr 2016SEC Form 4	4 d	had shares withheld for taxnot a trade	Chegg	375 shares	down −82.3%	down −82.7%
7 Mar 2016	9 Mar 2016SEC Form 4	2 d	was grantednot a trade	Chegg	20,833 shares	down −83.1%	down −83.1%
24 Feb 2016	25 Feb 2016SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	2,171 shares	down −81.6%	down −81.3%
23 Feb 2016	25 Feb 2016SEC Form 4	2 d	was grantednot a trade	Chegg	12,897 shares	down −78.2%	down −81.3%
23 Feb 2016	25 Feb 2016SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	1,884 shares	down −78.2%	down −81.3%
23 Feb 2016	25 Feb 2016SEC Form 4	2 d	was grantednot a trade	Chegg	54,166 shares	down −78.2%	down −81.3%
1 Feb 2016	3 Feb 2016SEC Form 4	2 d	had shares withheld for taxnot a trade	Chegg	2,215 shares	down −86.9%	down −86.5%
1 Jan 2016	4 Jan 2016SEC Form 4	3 d	had shares withheld for taxnot a trade	Chegg	447 shares	down −88.7%	down −87.9%
1 Oct 2015	2 Oct 2015SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −89.4%	down −89.6%
1 Jul 2015	2 Jul 2015SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	384 shares	down −90.1%	down −90.2%
1 Apr 2015	6 Apr 2015SEC Form 4	5 d	had shares withheld for taxnot a trade	Chegg	375 shares	down −90.3%	down −90.3%
24 Feb 2015	25 Feb 2015SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	2,248 shares	down −91.2%	down −91.0%
2 Feb 2015	4 Feb 2015SEC Form 4	2 d	was grantednot a trade	Chegg	15,174 shares	down −88.5%	down −88.8%
1 Jan 2015	2 Jan 2015SEC Form 4	1 d	had shares withheld for taxnot a trade	Chegg	447 shares	down −89.0%	down −89.2%
1 Oct 2014	2 Oct 2014SEC Form 4	1 d	was grantednot a trade	Chegg	16,337 shares	down −87.7%	down −87.9%

Both percentages are the stock’s move, not Robin Tomasello’s return: a disclosure gives a band, never an amount, so nobody can say how much was bought or what it made. They run to the last close we hold — 9 Sep 2026, except where a name has since delisted, when the row names its own last session. We publish no close, no volume and no dollar figure behind them. 107 of the 107 rows shown carry a percentage; the rest are dashes with the reason on the row.

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.

Some filings reach us as photographs of paper rather than as a form we can read as text. Those are shown here only once they have been read and checked, so this page can hold fewer lines than the filings behind it contain. The link on every row opens the original document, which is always the full record.