Mostapha Tahiri

Insider

First SEC filing: Jan. 9, 2024 · Latest: May 19, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

STT selling April 22, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-1,469,810 + 19 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

19 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 14, 2026	STT	F	54	$191.74	$10,354	64,497 Direct	-0.08%	Disposed	-2.9% (price as of 2026-08-21)
May 15, 2026	STT	F	91	$152.85	$13,909	64,551 Direct	-0.14%	Disposed	21.8% (price as of 2026-08-21)
April 22, 2026	STT	S	9,611	$152.93	$1,469,810	64,642 Direct	-12.94%	Disposed	21.8% (price as of 2026-08-21)
Feb. 26, 2026	STT	A	14,259	—	—	74,253 Direct	+23.77%	Acquired	(price as of 2026-08-21)
Feb. 13, 2026	STT	F	2,269	$127.97	$290,364	59,994 Direct	-3.64%	Disposed	45.5% (price as of 2026-08-21)
Feb. 13, 2026	STT	F	1,639	$127.97	$209,743	62,263 Direct	-2.56%	Disposed	45.5% (price as of 2026-08-21)
Feb. 13, 2026	STT	A	10,193	—	—	63,902 Direct	+18.98%	Acquired	(price as of 2026-08-21)
Nov. 14, 2025	STT	F	74	$116.84	$8,646	53,709 Direct	-0.14%	Disposed	59.4% (price as of 2026-08-21)
Aug. 15, 2025	STT	F	70	$111.07	$7,775	53,783 Direct	-0.13%	Disposed	67.6% (price as of 2026-08-21)
May 15, 2025	STT	F	50	$98.20	$4,910	53,853 Direct	-0.09%	Disposed	89.6% (price as of 2026-08-21)
May 2, 2025	STT	S	3,989	$90.43	$360,725	53,903 Direct	-6.89%	Disposed	105.9% (price as of 2026-08-21)
Feb. 28, 2025	STT	A	15,811	—	—	57,892 Direct	+37.57%	Acquired	(price as of 2026-08-21)
Feb. 15, 2025	STT	F	415	$99.16	$41,151	42,081 Direct	-0.98%	Disposed	87.8% (price as of 2026-08-21)
Feb. 15, 2025	STT	F	685	$99.16	$67,925	42,496 Direct	-1.59%	Disposed	87.8% (price as of 2026-08-21)
Feb. 15, 2025	STT	A	5,111	—	—	43,181 Direct	+13.43%	Acquired	(price as of 2026-08-21)
Nov. 15, 2024	STT	F	69	$95.48	$6,588	38,070 Direct	-0.18%	Disposed	95.0% (price as of 2026-08-21)
Aug. 15, 2024	STT	F	85	$80.55	$6,847	38,139 Direct	-0.22%	Disposed	131.2% (price as of 2026-08-21)
May 15, 2024	STT	F	85	$77.57	$6,593	38,224 Direct	-0.22%	Disposed	140.0% (price as of 2026-08-21)
Feb. 15, 2024	STT	F	728	$73.03	$53,166	38,309 Direct	-1.86%	Disposed	155.0% (price as of 2026-08-21)
Feb. 15, 2024	STT	F	880	$73.03	$64,266	39,037 Direct	-2.20%	Disposed	155.0% (price as of 2026-08-21)
Feb. 15, 2024	STT	A	3,665	—	—	39,917 Direct	+10.11%	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Initial ownership (Form 3) 2 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Jan. 9, 2024	STT	Common Stock	36,252	Direct
Sept. 2, 2020	STT	Common Stock	0	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

STT

COO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$650,000	—	$3,737,498	—	$2,468,806	—	$62,537	$6,918,841

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.