SIC 7373 Services-Computer Integrated Systems Design

Samsara Inc. vs Leidos Holdings Inc.

WatchlistIOT / LDOSPrices through Oct 22, 2026

Why these are rivals: #1 and #2 by market value ($24B vs $16B) with SEC SIC 7373 (Services-Computer Integrated Systems Design).

Rivals, but right now the price gap does not have a measured habit of closing, so there is no paper idea, whatever the gap.

Co-movement: daily return correlation, 252 sessions: 0.27 (needs >= 0.60)
Mean reversion: ADF t-statistic of the spread: -0.88 (needs <= -2.873 (5% critical value))
Speed: half-life of the spread, sessions: 100.20 (needs <= 63)

Business leadership

LDOS is the larger business

Annual revenue reported to the SEC. Scale, not market share.

Year	IOT	LDOS	Larger
2025	$1.6B	$17.2B	LDOS
2024	$1.2B	$16.7B	LDOS
2023	$937M	$15.4B	LDOS
2022	$653M	$14.4B	LDOS
2021	$428M	$13.7B	LDOS
2020	$250M	$12.3B	LDOS

LDOS led in every year with figures for both. Market value: IOT $23.6B, LDOS $15.8B.

Stock leadership

IOT is ahead now

Measured against the pair's own last 252 trading days.

IOT leads LDOS by 1.28 standard deviations: +40.5% over its usual price ratio. 1 lead switch in the last year.

Price change	3 mo	6 mo	12 mo
IOT	+32.2%	+49.5%	+11.8%
LDOS	+20.1%	-8.7%	-30.2%

Relationship

Not a measured twin today

Only these tests can make a pair tradable on paper.

Pass: Aligned sessions: 1218 (needs >= 254)
Fail: Co-movement: daily return correlation, 252 sessions: 0.27 (needs >= 0.60)
Fail: Mean reversion: ADF t-statistic of the spread: -0.88 (needs <= -2.873 (5% critical value))
Fail: Speed: half-life of the spread, sessions: 100.20 (needs <= 63)
Data: Both stocks current

The twins over two years

Prices side by side, and the gap between them

IOT Samsara Inc. LDOS Leidos Holdings Inc.Price index, 100 = 2024-10-18. Tint = which stock is ahead of the pair's usual 1-year relationship (z beyond +/-0.5).

Spread z-score: IOT relative to LDOS, against the 252 sessions before each day. Above 0: IOT ahead; below 0: LDOS ahead. Lines at +/-2 (idea) and +/-4 (stop).

Data table (504 sessions)

Date	IOT index	LDOS index	z	Ahead
2026-10-22	87.56	79.48	+1.28	IOT ahead
2026-10-21	86.48	76.23	+1.41	IOT ahead
2026-10-20	84.78	75.31	+1.39	IOT ahead
2026-10-19	80.60	74.36	+1.26	IOT ahead
2026-10-16	79.14	73.65	+1.23	IOT ahead
2026-10-15	85.18	73.15	+1.56	IOT ahead
2026-10-14	81.60	71.14	+1.51	IOT ahead
2026-10-13	82.54	70.61	+1.60	IOT ahead
2026-10-12	83.24	71.73	+1.59	IOT ahead
2026-10-09	83.10	71.78	+1.59	IOT ahead
2026-10-08	82.44	70.33	+1.66	IOT ahead
2026-10-07	81.02	66.98	+1.80	IOT ahead
2026-10-06	83.48	68.84	+1.83	IOT ahead
2026-10-05	84.78	70.46	+1.82	IOT ahead
2026-10-02	82.24	69.45	+1.78	IOT ahead
2026-10-01	80.08	71.95	+1.54	IOT ahead
2026-09-30	76.26	71.87	+1.36	IOT ahead
2026-09-29	75.94	72.62	+1.31	IOT ahead
2026-09-28	75.86	72.17	+1.34	IOT ahead
2026-09-25	75.92	72.92	+1.32	IOT ahead
2026-09-24	78.64	72.76	+1.48	IOT ahead
2026-09-23	78.16	73.55	+1.42	IOT ahead
2026-09-22	76.52	72.74	+1.39	IOT ahead
2026-09-21	76.10	75.64	+1.22	IOT ahead
2026-09-18	79.10	75.32	+1.41	IOT ahead
2026-09-17	80.00	77.25	+1.36	IOT ahead
2026-09-16	81.32	76.30	+1.49	IOT ahead
2026-09-15	83.30	76.24	+1.61	IOT ahead
2026-09-14	85.82	78.36	+1.64	IOT ahead
2026-09-11	76.76	76.01	+1.30	IOT ahead
2026-09-10	76.88	76.42	+1.30	IOT ahead
2026-09-09	77.30	75.59	+1.38	IOT ahead
2026-09-08	80.30	76.24	+1.51	IOT ahead
2026-09-04	80.40	78.49	+1.41	IOT ahead
2026-09-03	77.50	78.08	+1.28	IOT ahead
2026-09-02	73.58	78.92	+1.02	IOT ahead
2026-09-01	78.12	82.10	+1.11	IOT ahead
2026-08-31	81.70	82.71	+1.29	IOT ahead
2026-08-28	82.32	82.98	+1.32	IOT ahead
2026-08-27	83.74	82.50	+1.43	IOT ahead
2026-08-26	79.68	81.07	+1.30	IOT ahead
2026-08-25	78.28	79.37	+1.33	IOT ahead
2026-08-24	80.66	81.66	+1.34	IOT ahead
2026-08-21	79.88	83.41	+1.22	IOT ahead
2026-08-20	77.96	83.39	+1.12	IOT ahead
2026-08-19	78.40	86.31	+1.00	IOT ahead
2026-08-18	79.16	84.64	+1.14	IOT ahead
2026-08-17	78.00	83.91	+1.12	IOT ahead
2026-08-14	79.58	84.85	+1.17	IOT ahead
2026-08-13	82.28	84.13	+1.37	IOT ahead
2026-08-12	78.68	82.81	+1.25	IOT ahead
2026-08-11	80.64	83.11	+1.35	IOT ahead
2026-08-10	79.72	82.06	+1.37	IOT ahead
2026-08-07	81.76	81.15	+1.55	IOT ahead
2026-08-06	76.44	79.79	+1.33	IOT ahead
2026-08-05	77.46	74.83	+1.70	IOT ahead
2026-08-04	77.20	77.04	+1.56	IOT ahead
2026-08-03	74.26	70.03	+1.84	IOT ahead
2026-07-31	74.54	68.19	+2.00	IOT ahead
2026-07-30	71.60	66.31	+1.96	IOT ahead
2026-07-29	77.50	67.47	+2.27	IOT ahead
2026-07-28	75.00	69.82	+1.98	IOT ahead
2026-07-27	70.68	67.81	+1.85	IOT ahead
2026-07-24	66.22	66.15	+1.67	IOT ahead
2026-07-23	62.98	65.08	+1.51	IOT ahead
2026-07-22	66.66	63.27	+1.94	IOT ahead
2026-07-21	72.14	61.89	+2.47	IOT ahead
2026-07-20	77.10	63.13	+2.75	IOT ahead
2026-07-17	76.64	62.81	+2.79	IOT ahead
2026-07-16	74.92	63.88	+2.63	IOT ahead
2026-07-15	72.86	63.83	+2.53	IOT ahead
2026-07-14	73.80	62.86	+2.72	IOT ahead
2026-07-13	73.66	62.87	+2.76	IOT ahead
2026-07-10	73.44	63.13	+2.76	IOT ahead
2026-07-09	73.98	62.90	+2.88	IOT ahead
2026-07-08	72.88	63.23	+2.81	IOT ahead
2026-07-07	72.68	64.05	+2.77	IOT ahead
2026-07-06	75.02	64.13	+3.00	IOT ahead
2026-07-02	71.86	64.20	+2.79	IOT ahead
2026-07-01	68.36	60.80	+2.86	IOT ahead
2026-06-30	64.86	60.74	+2.58	IOT ahead
2026-06-29	64.20	59.25	+2.70	IOT ahead
2026-06-26	62.28	60.03	+2.47	IOT ahead
2026-06-25	57.96	58.99	+2.15	IOT ahead
2026-06-24	62.48	61.54	+2.37	IOT ahead
2026-06-23	62.58	62.59	+2.29	IOT ahead
2026-06-22	62.28	61.85	+2.35	IOT ahead
2026-06-18	63.38	63.19	+2.35	IOT ahead
2026-06-17	63.20	64.10	+2.25	IOT ahead
2026-06-16	65.30	67.00	+2.19	IOT ahead
2026-06-15	67.08	67.60	+2.31	IOT ahead
2026-06-12	67.32	72.06	+1.92	IOT ahead
2026-06-11	64.52	72.02	+1.65	IOT ahead
2026-06-10	65.28	71.79	+1.73	IOT ahead
2026-06-09	67.24	72.86	+1.81	IOT ahead
2026-06-08	68.12	72.44	+1.90	IOT ahead
2026-06-05	69.60	73.40	+1.93	IOT ahead
2026-06-04	70.42	73.48	+1.98	IOT ahead
2026-06-03	72.68	73.35	+2.17	IOT ahead
2026-06-02	74.72	74.81	+2.20	IOT ahead
2026-06-01	77.10	75.34	+2.35	IOT ahead
2026-05-29	69.98	75.39	+1.75	IOT ahead
2026-05-28	63.14	77.63	+0.95	IOT ahead
2026-05-27	58.94	77.05	+0.57	IOT ahead
2026-05-26	62.32	75.58	+1.00	IOT ahead
2026-05-22	62.30	74.33	+1.09	IOT ahead
2026-05-21	60.30	72.58	+1.02	IOT ahead
2026-05-20	61.26	73.38	+1.04	IOT ahead
2026-05-19	61.58	74.30	+0.99	IOT ahead
2026-05-18	61.22	73.64	+0.99	IOT ahead
2026-05-15	59.12	72.96	+0.84	IOT ahead
2026-05-14	55.98	74.06	+0.44	near the usual relationship
2026-05-13	55.04	73.25	+0.40	near the usual relationship
2026-05-12	56.20	75.74	+0.32	near the usual relationship
2026-05-11	58.14	75.32	+0.53	IOT ahead
2026-05-08	59.48	76.75	+0.55	IOT ahead
2026-05-07	60.22	77.43	+0.56	IOT ahead
2026-05-06	57.84	79.58	+0.19	near the usual relationship
2026-05-05	60.90	80.93	+0.37	near the usual relationship
2026-05-04	61.20	87.78	-0.04	near the usual relationship
2026-05-01	60.98	88.03	-0.08	near the usual relationship
2026-04-30	57.48	88.03	-0.40	near the usual relationship
2026-04-29	58.74	86.07	-0.18	near the usual relationship
2026-04-28	58.66	86.21	-0.20	near the usual relationship
2026-04-27	58.94	85.09	-0.11	near the usual relationship
2026-04-24	59.92	86.16	-0.09	near the usual relationship
2026-04-23	58.56	87.07	-0.27	near the usual relationship
2026-04-22	64.08	88.90	+0.08	near the usual relationship
2026-04-21	62.86	90.37	-0.11	near the usual relationship
2026-04-20	61.62	91.33	-0.27	near the usual relationship
2026-04-17	61.24	91.53	-0.32	near the usual relationship
2026-04-16	59.26	92.30	-0.53	LDOS ahead
2026-04-15	57.70	93.82	-0.76	LDOS ahead
2026-04-14	53.02	92.12	-1.11	LDOS ahead
2026-04-13	53.18	92.96	-1.15	LDOS ahead
2026-04-10	51.70	90.18	-1.14	LDOS ahead
2026-04-09	53.70	91.81	-1.05	LDOS ahead
2026-04-08	58.60	94.76	-0.77	LDOS ahead
2026-04-07	60.94	93.72	-0.52	LDOS ahead
2026-04-06	62.90	94.07	-0.38	near the usual relationship
2026-04-02	64.52	93.69	-0.24	near the usual relationship
2026-04-01	63.68	92.03	-0.22	near the usual relationship
2026-03-31	63.38	91.74	-0.24	near the usual relationship
2026-03-30	61.28	90.96	-0.37	near the usual relationship
2026-03-27	59.50	91.75	-0.56	LDOS ahead
2026-03-26	63.78	92.96	-0.29	near the usual relationship
2026-03-25	63.70	93.72	-0.34	near the usual relationship
2026-03-24	64.18	93.79	-0.32	near the usual relationship
2026-03-23	66.40	95.88	-0.27	near the usual relationship
2026-03-20	66.26	97.85	-0.38	near the usual relationship
2026-03-19	67.32	97.89	-0.31	near the usual relationship
2026-03-18	67.36	98.37	-0.34	near the usual relationship
2026-03-17	67.42	99.68	-0.40	near the usual relationship
2026-03-16	65.14	98.78	-0.53	LDOS ahead
2026-03-13	63.44	102.56	-0.84	LDOS ahead
2026-03-12	63.72	102.53	-0.83	LDOS ahead
2026-03-11	64.16	102.27	-0.79	LDOS ahead
2026-03-10	65.80	101.76	-0.65	LDOS ahead
2026-03-09	68.32	105.91	-0.66	LDOS ahead
2026-03-06	70.72	104.94	-0.46	near the usual relationship
2026-03-05	59.16	103.62	-1.25	LDOS ahead
2026-03-04	57.38	104.24	-1.43	LDOS ahead
2026-03-03	57.88	106.57	-1.50	LDOS ahead
2026-03-02	58.22	105.83	-1.44	LDOS ahead
2026-02-27	57.80	103.29	-1.37	LDOS ahead
2026-02-26	57.92	103.74	-1.38	LDOS ahead
2026-02-25	54.88	100.22	-1.47	LDOS ahead
2026-02-24	52.14	102.72	-1.82	LDOS ahead
2026-02-23	49.44	101.46	-2.00	LDOS ahead
2026-02-20	53.58	102.35	-1.68	LDOS ahead
2026-02-19	53.60	103.98	-1.75	LDOS ahead
2026-02-18	53.86	101.19	-1.61	LDOS ahead
2026-02-17	52.32	95.29	-1.48	LDOS ahead
2026-02-13	54.64	104.00	-1.67	LDOS ahead
2026-02-12	53.34	101.13	-1.66	LDOS ahead
2026-02-11	55.50	102.05	-1.54	LDOS ahead
2026-02-10	55.80	114.87	-2.03	LDOS ahead
2026-02-09	54.46	114.78	-2.14	LDOS ahead
2026-02-06	50.84	113.84	-2.42	LDOS ahead
2026-02-05	48.50	109.77	-2.50	LDOS ahead
2026-02-04	50.20	111.16	-2.43	LDOS ahead
2026-02-03	49.30	111.96	-2.57	LDOS ahead
2026-02-02	52.82	110.92	-2.27	LDOS ahead
2026-01-30	56.10	111.07	-2.03	LDOS ahead
2026-01-29	58.18	110.42	-1.87	LDOS ahead
2026-01-28	60.24	110.77	-1.75	LDOS ahead
2026-01-27	61.16	110.40	-1.69	LDOS ahead
2026-01-26	64.38	111.79	-1.53	LDOS ahead
2026-01-23	64.20	112.81	-1.60	LDOS ahead
2026-01-22	64.16	114.12	-1.67	LDOS ahead
2026-01-21	63.60	113.33	-1.69	LDOS ahead
2026-01-20	63.98	112.62	-1.66	LDOS ahead
2026-01-16	69.78	114.85	-1.38	LDOS ahead
2026-01-15	68.52	114.06	-1.44	LDOS ahead
2026-01-14	67.70	112.56	-1.45	LDOS ahead
2026-01-13	67.96	115.60	-1.56	LDOS ahead
2026-01-12	66.92	115.38	-1.64	LDOS ahead
2026-01-09	67.34	117.00	-1.69	LDOS ahead
2026-01-08	67.60	115.16	-1.62	LDOS ahead
2026-01-07	72.62	115.98	-1.34	LDOS ahead
2026-01-06	69.92	116.51	-1.54	LDOS ahead
2026-01-05	68.56	115.32	-1.60	LDOS ahead
2026-01-02	67.84	108.23	-1.38	LDOS ahead
2025-12-31	70.90	106.42	-1.11	LDOS ahead
2025-12-30	71.96	108.16	-1.12	LDOS ahead
2025-12-29	72.56	109.42	-1.15	LDOS ahead
2025-12-26	72.96	109.64	-1.14	LDOS ahead
2025-12-24	73.12	110.09	-1.16	LDOS ahead
2025-12-23	74.30	109.91	-1.09	LDOS ahead
2025-12-22	76.74	109.75	-0.94	LDOS ahead
2025-12-19	76.38	108.94	-0.94	LDOS ahead
2025-12-18	76.30	106.88	-0.86	LDOS ahead
2025-12-17	76.46	106.98	-0.86	LDOS ahead
2025-12-16	77.96	107.46	-0.80	LDOS ahead
2025-12-15	79.34	109.69	-0.82	LDOS ahead
2025-12-12	82.78	111.92	-0.73	LDOS ahead
2025-12-11	87.70	112.39	-0.49	near the usual relationship
2025-12-10	90.04	111.08	-0.32	near the usual relationship
2025-12-09	87.58	109.10	-0.37	near the usual relationship
2025-12-08	87.52	109.50	-0.39	near the usual relationship
2025-12-05	90.44	110.21	-0.28	near the usual relationship
2025-12-04	81.42	113.51	-0.89	LDOS ahead
2025-12-03	78.02	111.16	-1.00	LDOS ahead
2025-12-02	75.96	110.35	-1.09	LDOS ahead
2025-12-01	74.54	111.15	-1.22	LDOS ahead
2025-11-28	76.06	112.73	-1.20	LDOS ahead
2025-11-26	74.70	112.29	-1.28	LDOS ahead
2025-11-25	74.90	112.97	-1.30	LDOS ahead
2025-11-24	72.56	110.20	-1.35	LDOS ahead
2025-11-21	73.44	110.01	-1.29	LDOS ahead
2025-11-20	70.06	109.52	-1.50	LDOS ahead
2025-11-19	72.90	111.60	-1.42	LDOS ahead
2025-11-18	72.58	111.56	-1.45	LDOS ahead
2025-11-17	72.90	111.37	-1.43	LDOS ahead
2025-11-14	75.62	112.91	-1.34	LDOS ahead
2025-11-13	77.44	112.86	-1.24	LDOS ahead
2025-11-12	78.88	113.86	-1.20	LDOS ahead
2025-11-11	79.66	116.95	-1.29	LDOS ahead
2025-11-10	79.66	116.13	-1.26	LDOS ahead
2025-11-07	77.66	116.20	-1.39	LDOS ahead
2025-11-06	76.20	114.89	-1.44	LDOS ahead
2025-11-05	77.50	115.07	-1.38	LDOS ahead
2025-11-04	77.44	117.71	-1.50	LDOS ahead
2025-11-03	80.98	113.88	-1.14	LDOS ahead
2025-10-31	80.34	112.36	-1.12	LDOS ahead
2025-10-30	77.14	112.62	-1.34	LDOS ahead
2025-10-29	78.64	111.00	-1.18	LDOS ahead
2025-10-28	79.98	110.79	-1.10	LDOS ahead
2025-10-27	79.82	111.56	-1.15	LDOS ahead
2025-10-24	78.50	112.06	-1.26	LDOS ahead
2025-10-23	77.30	112.90	-1.39	LDOS ahead
2025-10-22	76.28	111.18	-1.39	LDOS ahead
2025-10-21	78.30	113.95	-1.39	LDOS ahead
2025-10-20	74.42	112.37	-1.59	LDOS ahead
2025-10-17	73.08	108.84	-1.54	LDOS ahead
2025-10-16	72.84	108.78	-1.56	LDOS ahead
2025-10-15	75.42	110.06	-1.46	LDOS ahead
2025-10-14	76.08	110.47	-1.45	LDOS ahead
2025-10-13	75.12	109.69	-1.49	LDOS ahead
2025-10-10	73.72	110.92	-1.66	LDOS ahead
2025-10-09	80.14	114.47	-1.41	LDOS ahead
2025-10-08	80.58	116.94	-1.50	LDOS ahead
2025-10-07	77.44	116.21	-1.69	LDOS ahead
2025-10-06	80.16	116.82	-1.55	LDOS ahead
2025-10-03	78.20	115.37	-1.63	LDOS ahead
2025-10-02	78.26	113.79	-1.57	LDOS ahead
2025-10-01	76.26	113.04	-1.69	LDOS ahead
2025-09-30	74.50	111.47	-1.75	LDOS ahead
2025-09-29	74.44	109.49	-1.68	LDOS ahead
2025-09-26	76.04	109.07	-1.57	LDOS ahead
2025-09-25	77.02	107.57	-1.44	LDOS ahead
2025-09-24	73.88	110.55	-1.82	LDOS ahead
2025-09-23	76.82	110.38	-1.62	LDOS ahead
2025-09-22	78.62	110.82	-1.54	LDOS ahead
2025-09-19	80.16	110.58	-1.43	LDOS ahead
2025-09-18	79.94	110.40	-1.45	LDOS ahead
2025-09-17	77.74	108.42	-1.52	LDOS ahead
2025-09-16	78.96	107.70	-1.41	LDOS ahead
2025-09-15	78.90	107.79	-1.43	LDOS ahead
2025-09-12	76.52	108.46	-1.65	LDOS ahead
2025-09-11	77.38	109.21	-1.64	LDOS ahead
2025-09-10	77.50	106.40	-1.50	LDOS ahead
2025-09-09	77.20	105.61	-1.49	LDOS ahead
2025-09-08	83.06	105.24	-1.07	LDOS ahead
2025-09-05	84.18	105.59	-1.02	LDOS ahead
2025-09-04	71.68	105.34	-1.92	LDOS ahead
2025-09-03	71.02	104.83	-1.96	LDOS ahead
2025-09-02	70.98	106.71	-2.09	LDOS ahead
2025-08-29	72.28	106.72	-2.01	LDOS ahead
2025-08-28	72.90	106.98	-1.99	LDOS ahead
2025-08-27	71.30	108.18	-2.21	LDOS ahead
2025-08-26	67.20	107.57	-2.57	LDOS ahead
2025-08-25	68.80	107.13	-2.44	LDOS ahead
2025-08-22	69.58	107.21	-2.41	LDOS ahead
2025-08-21	65.68	106.44	-2.77	LDOS ahead
2025-08-20	66.00	106.28	-2.78	LDOS ahead
2025-08-19	66.24	105.44	-2.75	LDOS ahead
2025-08-18	67.80	105.07	-2.63	LDOS ahead
2025-08-15	67.06	104.78	-2.73	LDOS ahead
2025-08-14	64.44	105.26	-3.08	LDOS ahead
2025-08-13	66.00	107.33	-3.12	LDOS ahead
2025-08-12	65.38	105.01	-3.10	LDOS ahead
2025-08-11	65.00	104.50	-3.17	LDOS ahead
2025-08-08	67.48	104.12	-2.94	LDOS ahead
2025-08-07	69.16	103.39	-2.76	LDOS ahead
2025-08-06	73.54	102.93	-2.30	LDOS ahead
2025-08-05	71.82	102.02	-2.44	LDOS ahead
2025-08-04	75.20	94.94	-1.59	LDOS ahead
2025-08-01	72.02	93.91	-1.84	LDOS ahead
2025-07-31	76.06	94.18	-1.46	LDOS ahead
2025-07-30	77.06	95.00	-1.43	LDOS ahead
2025-07-29	78.48	95.27	-1.32	LDOS ahead
2025-07-28	79.32	94.59	-1.18	LDOS ahead
2025-07-25	77.98	96.30	-1.44	LDOS ahead
2025-07-24	76.24	96.30	-1.61	LDOS ahead
2025-07-23	77.22	96.69	-1.55	LDOS ahead
2025-07-22	75.54	95.14	-1.59	LDOS ahead
2025-07-21	76.30	94.82	-1.50	LDOS ahead
2025-07-18	78.48	95.88	-1.37	LDOS ahead
2025-07-17	76.30	95.98	-1.60	LDOS ahead
2025-07-16	75.98	95.00	-1.56	LDOS ahead
2025-07-15	75.24	94.51	-1.59	LDOS ahead
2025-07-14	75.12	96.55	-1.77	LDOS ahead
2025-07-11	74.78	95.59	-1.73	LDOS ahead
2025-07-10	75.38	96.15	-1.73	LDOS ahead
2025-07-09	78.56	95.69	-1.38	LDOS ahead
2025-07-08	77.16	95.62	-1.51	LDOS ahead
2025-07-07	78.16	97.02	-1.53	LDOS ahead
2025-07-03	78.22	97.07	-1.53	LDOS ahead
2025-07-02	76.76	95.93	-1.58	LDOS ahead
2025-07-01	78.32	94.94	-1.34	LDOS ahead
2025-06-30	79.56	93.06	-1.06	LDOS ahead
2025-06-27	79.20	91.84	-0.97	LDOS ahead
2025-06-26	79.44	91.84	-0.93	LDOS ahead
2025-06-25	77.30	90.82	-1.03	LDOS ahead
2025-06-24	80.56	89.80	-0.64	LDOS ahead
2025-06-23	78.46	88.88	-0.74	LDOS ahead
2025-06-20	78.34	87.57	-0.63	LDOS ahead
2025-06-18	77.38	87.51	-0.69	LDOS ahead
2025-06-17	76.44	88.13	-0.81	LDOS ahead
2025-06-16	78.24	87.45	-0.58	LDOS ahead
2025-06-13	78.42	87.99	-0.60	LDOS ahead
2025-06-12	81.38	87.32	-0.29	near the usual relationship
2025-06-11	84.68	86.08	+0.07	near the usual relationship
2025-06-10	83.88	85.88	+0.03	near the usual relationship
2025-06-09	89.38	86.33	+0.41	near the usual relationship
2025-06-06	90.20	87.39	+0.40	near the usual relationship
2025-06-05	94.50	85.75	+0.82	IOT ahead
2025-06-04	93.46	85.19	+0.80	IOT ahead
2025-06-03	91.74	85.23	+0.69	IOT ahead
2025-06-02	93.28	83.56	+0.93	IOT ahead
2025-05-30	93.08	87.61	+0.61	IOT ahead
2025-05-29	91.56	87.01	+0.56	IOT ahead
2025-05-28	92.96	88.11	+0.58	IOT ahead
2025-05-27	93.58	89.99	+0.49	near the usual relationship
2025-05-23	91.00	89.95	+0.31	near the usual relationship
2025-05-22	92.28	93.38	+0.17	near the usual relationship
2025-05-21	91.30	93.76	+0.07	near the usual relationship
2025-05-20	94.62	94.56	+0.25	near the usual relationship
2025-05-19	95.24	94.11	+0.32	near the usual relationship
2025-05-16	94.84	93.79	+0.32	near the usual relationship
2025-05-15	93.86	92.47	+0.35	near the usual relationship
2025-05-14	95.48	90.29	+0.61	IOT ahead
2025-05-13	93.26	91.69	+0.37	near the usual relationship
2025-05-12	90.50	92.08	+0.15	near the usual relationship
2025-05-09	86.60	91.85	-0.12	near the usual relationship
2025-05-08	86.84	91.26	-0.06	near the usual relationship
2025-05-07	83.92	91.27	-0.28	near the usual relationship
2025-05-06	82.80	91.29	-0.36	near the usual relationship
2025-05-05	82.72	87.27	-0.08	near the usual relationship
2025-05-02	82.78	87.77	-0.11	near the usual relationship
2025-05-01	80.10	86.49	-0.22	near the usual relationship
2025-04-30	79.32	86.82	-0.31	near the usual relationship
2025-04-29	78.48	87.05	-0.40	near the usual relationship
2025-04-28	79.60	85.98	-0.23	near the usual relationship
2025-04-25	78.84	85.95	-0.28	near the usual relationship
2025-04-24	78.44	85.87	-0.31	near the usual relationship
2025-04-23	74.44	83.77	-0.48	near the usual relationship
2025-04-22	70.94	83.33	-0.75	LDOS ahead
2025-04-21	71.00	81.55	-0.61	LDOS ahead
2025-04-17	75.04	82.24	-0.31	near the usual relationship
2025-04-16	77.70	82.53	-0.11	near the usual relationship
2025-04-15	77.36	83.41	-0.20	near the usual relationship
2025-04-14	74.50	84.34	-0.51	LDOS ahead
2025-04-11	75.58	83.70	-0.37	near the usual relationship
2025-04-10	74.80	82.39	-0.33	near the usual relationship
2025-04-09	78.92	82.43	+0.01	near the usual relationship
2025-04-08	68.32	78.67	-0.61	LDOS ahead
2025-04-07	67.28	78.40	-0.69	LDOS ahead
2025-04-04	66.92	78.54	-0.74	LDOS ahead
2025-04-03	68.22	82.29	-0.92	LDOS ahead
2025-04-02	76.00	84.32	-0.39	near the usual relationship
2025-04-01	77.60	79.61	+0.11	near the usual relationship
2025-03-31	76.66	79.60	+0.03	near the usual relationship
2025-03-28	77.86	79.08	+0.17	near the usual relationship
2025-03-27	81.36	80.04	+0.38	near the usual relationship
2025-03-26	83.34	80.43	+0.50	IOT ahead
2025-03-25	85.22	80.37	+0.65	IOT ahead
2025-03-24	84.16	80.10	+0.59	IOT ahead
2025-03-21	80.32	78.95	+0.39	near the usual relationship
2025-03-20	78.98	79.55	+0.24	near the usual relationship
2025-03-19	79.64	81.76	+0.11	near the usual relationship
2025-03-18	76.22	81.80	-0.17	near the usual relationship
2025-03-17	77.92	81.52	-0.01	near the usual relationship
2025-03-14	76.12	79.37	+0.01	near the usual relationship
2025-03-13	74.28	78.37	-0.07	near the usual relationship
2025-03-12	76.04	78.81	+0.04	near the usual relationship
2025-03-11	71.80	79.11	-0.34	near the usual relationship
2025-03-10	68.12	81.04	-0.83	LDOS ahead
2025-03-07	70.72	82.14	-0.68	LDOS ahead
2025-03-06	83.76	78.49	+0.69	IOT ahead
2025-03-05	87.18	78.88	+0.92	IOT ahead
2025-03-04	88.32	78.00	+1.08	IOT ahead
2025-03-03	91.64	76.22	+1.48	IOT ahead
2025-02-28	95.36	76.67	+1.71	IOT ahead
2025-02-27	94.72	76.49	+1.70	IOT ahead
2025-02-26	100.08	76.45	+2.09	IOT ahead
2025-02-25	100.02	77.12	+2.05	IOT ahead
2025-02-24	101.26	75.68	+2.29	IOT ahead
2025-02-21	105.64	74.81	+2.70	IOT ahead
2025-02-20	109.30	76.72	+2.82	IOT ahead
2025-02-19	117.66	77.57	+3.33	IOT ahead
2025-02-18	121.92	77.44	+3.70	IOT ahead
2025-02-14	117.92	78.02	+3.50	IOT ahead
2025-02-13	112.74	77.07	+3.34	IOT ahead
2025-02-12	111.54	80.73	+2.97	IOT ahead
2025-02-11	110.48	81.17	+2.90	IOT ahead
2025-02-10	110.04	84.22	+2.63	IOT ahead
2025-02-07	109.18	83.93	+2.64	IOT ahead
2025-02-06	108.04	83.07	+2.69	IOT ahead
2025-02-05	108.00	83.35	+2.70	IOT ahead
2025-02-04	105.18	83.74	+2.48	IOT ahead
2025-02-03	102.82	83.56	+2.35	IOT ahead
2025-01-31	103.00	83.78	+2.37	IOT ahead
2025-01-30	103.98	83.88	+2.48	IOT ahead
2025-01-29	101.94	82.75	+2.46	IOT ahead
2025-01-28	103.64	83.47	+2.57	IOT ahead
2025-01-27	98.66	87.58	+1.73	IOT ahead
2025-01-24	96.38	85.88	+1.71	IOT ahead
2025-01-23	95.98	87.84	+1.48	IOT ahead
2025-01-22	95.62	95.04	+0.75	IOT ahead
2025-01-21	94.44	94.73	+0.67	IOT ahead
2025-01-17	93.74	91.54	+0.91	IOT ahead
2025-01-16	91.64	91.49	+0.71	IOT ahead
2025-01-15	91.34	91.58	+0.67	IOT ahead
2025-01-14	88.08	90.11	+0.49	near the usual relationship
2025-01-13	87.06	90.04	+0.39	near the usual relationship
2025-01-10	87.56	88.15	+0.63	IOT ahead
2025-01-08	88.36	85.98	+0.93	IOT ahead
2025-01-07	85.84	86.89	+0.58	IOT ahead
2025-01-06	89.94	87.45	+0.94	IOT ahead
2025-01-03	91.82	86.80	+1.20	IOT ahead
2025-01-02	87.98	84.53	+1.06	IOT ahead
2024-12-31	87.38	84.98	+0.95	IOT ahead
2024-12-30	87.82	84.46	+1.05	IOT ahead
2024-12-27	88.84	85.23	+1.07	IOT ahead
2024-12-26	91.12	85.95	+1.22	IOT ahead
2024-12-24	91.10	85.88	+1.22	IOT ahead
2024-12-23	91.26	85.65	+1.26	IOT ahead
2024-12-20	88.64	85.42	+1.02	IOT ahead
2024-12-19	85.34	84.47	+0.78	IOT ahead
2024-12-18	87.28	86.16	+0.80	IOT ahead
2024-12-17	93.56	88.57	+1.17	IOT ahead
2024-12-16	94.32	89.96	+1.10	IOT ahead
2024-12-13	92.16	90.35	+0.85	IOT ahead
2024-12-12	92.86	90.24	+0.93	IOT ahead
2024-12-11	92.80	90.58	+0.88	IOT ahead
2024-12-10	90.86	94.48	+0.33	near the usual relationship
2024-12-09	100.26	94.57	+1.18	IOT ahead
2024-12-06	104.54	96.24	+1.39	IOT ahead
2024-12-05	110.26	96.60	+1.84	IOT ahead
2024-12-04	111.68	97.37	+1.89	IOT ahead
2024-12-03	109.26	96.82	+1.75	IOT ahead
2024-12-02	107.30	96.82	+1.61	IOT ahead
2024-11-29	106.98	97.57	+1.53	IOT ahead
2024-11-27	107.48	96.73	+1.66	IOT ahead
2024-11-26	110.78	97.99	+1.84	IOT ahead
2024-11-25	111.00	96.51	+2.02	IOT ahead
2024-11-22	112.70	97.63	+2.08	IOT ahead
2024-11-21	109.76	97.15	+1.90	IOT ahead
2024-11-20	105.26	95.65	+1.68	IOT ahead
2024-11-19	104.46	93.38	+1.85	IOT ahead
2024-11-18	98.98	93.70	+1.33	IOT ahead
2024-11-15	99.02	94.77	+1.24	IOT ahead
2024-11-14	101.82	99.08	+1.09	IOT ahead
2024-11-13	105.72	114.68	+0.08	near the usual relationship
2024-11-12	104.68	118.73	-0.33	near the usual relationship
2024-11-11	105.04	118.80	-0.30	near the usual relationship
2024-11-08	105.44	117.05	-0.12	near the usual relationship
2024-11-07	103.54	113.63	-0.02	near the usual relationship
2024-11-06	100.52	114.56	-0.36	near the usual relationship
2024-11-05	96.48	112.12	-0.53	LDOS ahead
2024-11-04	93.32	109.91	-0.65	LDOS ahead
2024-11-01	92.44	107.93	-0.56	LDOS ahead
2024-10-31	95.58	108.05	-0.26	near the usual relationship
2024-10-30	98.70	109.57	-0.10	near the usual relationship
2024-10-29	97.16	109.64	-0.24	near the usual relationship
2024-10-28	95.18	100.12	+0.40	near the usual relationship
2024-10-25	95.38	99.52	+0.47	near the usual relationship
2024-10-24	96.54	99.57	+0.58	IOT ahead
2024-10-23	94.54	99.29	+0.42	near the usual relationship
2024-10-22	93.28	98.84	+0.35	near the usual relationship
2024-10-21	98.28	100.09	+0.71	IOT ahead
2024-10-18	100.00	100.00	+0.88	IOT ahead

One-day company-specific moves (4+ standard deviations, which block ideas for 10 sessions): Mar 7, 2025 (IOT -15.6%, LDOS +4.6%); Sep 5, 2025 (IOT +17.4%, LDOS +0.2%); Mar 6, 2026 (IOT +19.5%, LDOS +1.3%). Upcoming earnings: LDOS Nov 3, 2026 (pre-market).

Paired trades

The shared paper book and the replay, kept apart

Forward paper record

No paper position on this pair yet.

Historical simulation (a diagnostic, same rules)

No simulated trade through Oct 20, 2026: the pair rarely passed every test while 2 standard deviations apart.

Per $10,000 a leg. A replay on today's companies cannot prove an edge.

The companies

IOT and LDOS at a glance

IOT Samsara Inc.

Listing: NYSE · SEC CIK 1642896
Industry: EDP Services · SIC 7373 Services-Computer Integrated Systems Design
Market value: $23.6B
Price history: 1,218 daily closes, Dec 15, 2021 to Oct 22, 2026

LDOS Leidos Holdings Inc.

Listing: NYSE · SEC CIK 1336920
Industry: EDP Services · SIC 7373 Services-Computer Integrated Systems Design
Market value: $15.8B
Price history: 2,521 daily closes, Oct 12, 2016 to Oct 22, 2026

Daily prices: Nasdaq.com. Filings and industry codes: SEC EDGAR. Earnings dates: Nasdaq earnings calendar.

All pairs →

Pair	Status	Ahead now	Industry
LDOS / CACI	Watchlist	CACI by 1.10 sd	SIC 7373 Services-Computer Integrated Systems Design
IOT / CACI	Watchlist	IOT by 0.97 sd	SIC 7373 Services-Computer Integrated Systems Design

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Paper only: hypothetical paired positions with modelled costs. No broker, no orders, no real money. A historical simulation is a diagnostic, not proof of an edge. Not investment advice.