Relational Investors SC 13D/A TIMKEN / RELATIONAL INVESTORS ownership change

Exhibit A

Transactions by Reporting Persons in the last 60 days not previously reported.

Beneficial Ownership	Purchase or Sale	Quantity	Transaction Date	Price per Share (including commission)		How Effected
California State Teachers’ Retirement System	Purchase	200	11/28/2012	$	46.24	Open Market
California State Teachers’ Retirement System	Purchase	4,000	11/29/2012	$	46.23	Open Market
California State Teachers’ Retirement System	Sale	4,000	11/29/2012	$	46.23	Open Market
California State Teachers’ Retirement System	Purchase	915	11/30/2012	$	44.92	Open Market
California State Teachers’ Retirement System	Sale	4,000	11/30/2012	$	44.86	Open Market
California State Teachers’ Retirement System	Purchase	100	12/5/2012	$	45.47	Open Market
California State Teachers’ Retirement System	Purchase	915	12/5/2012	$	45.24	Open Market
California State Teachers’ Retirement System	Sale	915	12/5/2012	$	45.24	Open Market
California State Teachers’ Retirement System	Purchase	200	12/6/2012	$	45.43	Open Market
California State Teachers’ Retirement System	Purchase	414	12/6/2012	$	45.42	Open Market
California State Teachers’ Retirement System	Sale	1,497	12/7/2012	$	45.77	Open Market
California State Teachers’ Retirement System	Sale	844	12/7/2012	$	45.47	Open Market
California State Teachers’ Retirement System	Sale	990	12/10/2012	$	45.76	Open Market
California State Teachers’ Retirement System	Sale	1,850	12/12/2012	$	45.76	Open Market
California State Teachers’ Retirement System	Purchase	100	12/13/2012	$	45.53	Open Market
California State Teachers’ Retirement System	Purchase	1,000	12/18/2012	$	47.28	Open Market
California State Teachers’ Retirement System	Purchase	600	12/18/2012	$	46.16	Open Market
California State Teachers’ Retirement System	Sale	600	12/18/2012	$	46.16	Open Market
California State Teachers’ Retirement System	Sale	600	12/19/2012	$	47.24	Open Market
California State Teachers’ Retirement System	Purchase	100	12/21/2012	$	46.44	Open Market
California State Teachers’ Retirement System	Purchase	1,000	12/27/2012	$	46.41	Open Market
California State Teachers’ Retirement System	Sale	1,000	12/27/2012	$	46.41	Open Market
California State Teachers’ Retirement System	Purchase	1,200	12/28/2012	$	46.66	Open Market
California State Teachers’ Retirement System	Purchase	1,100	12/31/2012	$	46.30	Open Market
California State Teachers’ Retirement System	Sale	765	12/31/2012	$	47.55	Open Market
California State Teachers’ Retirement System	Sale	1,100	12/31/2012	$	46.30	Open Market
California State Teachers’ Retirement System	Purchase	85	1/2/2013	$	48.60	Open Market
California State Teachers’ Retirement System	Purchase	300	1/2/2013	$	49.03	Open Market
California State Teachers’ Retirement System	Sale	1,100	1/3/2013	$	49.33	Open Market
California State Teachers’ Retirement System	Purchase	100	1/8/2013	$	48.32	Open Market
California State Teachers’ Retirement System	Sale	528	1/8/2013	$	48.22	Open Market

Relational Coast Partners, L.P.	Purchase	15	1/9/2013	$	49.59	Open Market
Relational Coast Partners, L.P.	Purchase	4	1/9/2013	$	49.92	Open Market
Relational Coast Partners, L.P.	Purchase	36	1/9/2013	$	49.98	Open Market
Relational Coast Partners, L.P.	Purchase	3,779	1/9/2013	$	49.59	Open Market
Relational Coast Partners, L.P.	Purchase	1,150	1/9/2013	$	49.92	Open Market
Relational Coast Partners, L.P.	Purchase	9,085	1/9/2013	$	49.98	Open Market
Relational Fund Partners, L.P.	Purchase	371	1/9/2013	$	49.59	Open Market
Relational Fund Partners, L.P.	Purchase	112	1/9/2013	$	49.92	Open Market
Relational Fund Partners, L.P.	Purchase	893	1/9/2013	$	49.98	Open Market
Relational Investors IX, L.P.	Purchase	5,237	1/9/2013	$	49.59	Open Market
Relational Investors IX, L.P.	Purchase	2,244	1/9/2013	$	49.59	Open Market
Relational Investors IX, L.P.	Purchase	2,276	1/9/2013	$	49.92	Open Market
Relational Investors IX, L.P.	Purchase	17,982	1/9/2013	$	49.98	Open Market
Relational Investors LLC	Purchase	5,067	1/9/2013	$	49.59	Open Market
Relational Investors LLC	Purchase	1,542	1/9/2013	$	49.92	Open Market
Relational Investors LLC	Purchase	12,181	1/9/2013	$	49.98	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	47,153	1/9/2013	$	49.59	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	14,353	1/9/2013	$	49.92	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	113,334	1/9/2013	$	49.98	Open Market
Relational Investors XV, L.P.	Purchase	3,635	1/9/2013	$	49.59	Open Market
Relational Investors XV, L.P.	Purchase	1,106	1/9/2013	$	49.92	Open Market
Relational Investors XV, L.P.	Purchase	8,737	1/9/2013	$	49.98	Open Market
Relational Investors XX, L.P.	Purchase	3,093	1/9/2013	$	49.59	Open Market
Relational Investors XX, L.P.	Purchase	941	1/9/2013	$	49.92	Open Market
Relational Investors XX, L.P.	Purchase	7,436	1/9/2013	$	49.98	Open Market
Relational Investors XXIII, L.P.	Purchase	4,406	1/9/2013	$	49.59	Open Market
Relational Investors XXIII, L.P.	Purchase	1,340	1/9/2013	$	49.92	Open Market
Relational Investors XXIII, L.P.	Purchase	10,590	1/9/2013	$	49.98	Open Market
Relational Coast Partners, L.P.	Purchase	32	1/10/2013	$	49.82	Open Market
Relational Coast Partners, L.P.	Purchase	2	1/10/2013	$	49.99	Open Market
Relational Coast Partners, L.P.	Purchase	8,063	1/10/2013	$	49.82	Open Market
Relational Coast Partners, L.P.	Purchase	602	1/10/2013	$	49.98	Open Market
Relational Fund Partners, L.P.	Purchase	795	1/10/2013	$	49.82	Open Market
Relational Fund Partners, L.P.	Purchase	57	1/10/2013	$	49.98	Open Market
Relational Investors IX, L.P.	Purchase	11,172	1/10/2013	$	49.82	Open Market
Relational Investors IX, L.P.	Purchase	4,788	1/10/2013	$	49.82	Open Market
Relational Investors IX, L.P.	Purchase	1,192	1/10/2013	$	49.98	Open Market
Relational Investors LLC	Purchase	10,811	1/10/2013	$	49.82	Open Market
Relational Investors LLC	Purchase	807	1/10/2013	$	49.98	Open Market

Relational Investors Mid-Cap Fund II, L.P.	Purchase	100,584	1/10/2013	$	49.82	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	7,517	1/10/2013	$	49.98	Open Market
Relational Investors XV, L.P.	Purchase	7,755	1/10/2013	$	49.82	Open Market
Relational Investors XV, L.P.	Purchase	579	1/10/2013	$	49.98	Open Market
Relational Investors XX, L.P.	Purchase	6,600	1/10/2013	$	49.82	Open Market
Relational Investors XX, L.P.	Purchase	492	1/10/2013	$	49.98	Open Market
Relational Investors XXIII, L.P.	Purchase	9,400	1/10/2013	$	49.82	Open Market
Relational Investors XXIII, L.P.	Purchase	702	1/10/2013	$	49.98	Open Market
Relational Coast Partners, L.P.	Purchase	20	1/11/2013	$	49.77	Open Market
Relational Coast Partners, L.P.	Purchase	10	1/11/2013	$	49.62	Open Market
Relational Coast Partners, L.P.	Purchase	5,039	1/11/2013	$	49.77	Open Market
Relational Coast Partners, L.P.	Purchase	2,519	1/11/2013	$	49.62	Open Market
Relational Fund Partners, L.P.	Purchase	497	1/11/2013	$	49.77	Open Market
Relational Fund Partners, L.P.	Purchase	248	1/11/2013	$	49.62	Open Market
Relational Investors IX, L.P.	Purchase	9,975	1/11/2013	$	49.77	Open Market
Relational Investors IX, L.P.	Purchase	3,491	1/11/2013	$	49.62	Open Market
Relational Investors IX, L.P.	Purchase	1,496	1/11/2013	$	49.62	Open Market
Relational Investors LLC	Purchase	6,757	1/11/2013	$	49.77	Open Market
Relational Investors LLC	Purchase	3,378	1/11/2013	$	49.62	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	62,865	1/11/2013	$	49.77	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	31,436	1/11/2013	$	49.62	Open Market
Relational Investors XV, L.P.	Purchase	4,847	1/11/2013	$	49.77	Open Market
Relational Investors XV, L.P.	Purchase	2,423	1/11/2013	$	49.62	Open Market
Relational Investors XX, L.P.	Purchase	4,125	1/11/2013	$	49.77	Open Market
Relational Investors XX, L.P.	Purchase	2,062	1/11/2013	$	49.62	Open Market
Relational Investors XXIII, L.P.	Purchase	5,875	1/11/2013	$	49.77	Open Market
Relational Investors XXIII, L.P.	Purchase	2,937	1/11/2013	$	49.62	Open Market
California State Teachers’ Retirement System	Purchase	100	1/14/2013	$	49.85	Open Market
Relational Coast Partners, L.P.	Purchase	18	1/14/2013	$	49.66	Open Market
Relational Coast Partners, L.P.	Purchase	6	1/14/2013	$	49.74	Open Market
Relational Coast Partners, L.P.	Purchase	4,445	1/14/2013	$	49.66	Open Market
Relational Coast Partners, L.P.	Purchase	1,606	1/14/2013	$	49.74	Open Market
Relational Fund Partners, L.P.	Purchase	437	1/14/2013	$	49.66	Open Market
Relational Fund Partners, L.P.	Purchase	157	1/14/2013	$	49.74	Open Market
Relational Investors IX, L.P.	Purchase	8,798	1/14/2013	$	49.66	Open Market
Relational Investors IX, L.P.	Purchase	3,179	1/14/2013	$	49.74	Open Market
Relational Investors LLC	Purchase	5,960	1/14/2013	$	49.66	Open Market
Relational Investors LLC	Purchase	2,154	1/14/2013	$	49.74	Open Market

Relational Investors Mid-Cap Fund II, L.P.	Purchase	55,445	1/14/2013	$	49.66	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	20,043	1/14/2013	$	49.74	Open Market
Relational Investors XV, L.P.	Purchase	4,275	1/14/2013	$	49.66	Open Market
Relational Investors XV, L.P.	Purchase	1,545	1/14/2013	$	49.74	Open Market
Relational Investors XX, L.P.	Purchase	3,638	1/14/2013	$	49.66	Open Market
Relational Investors XX, L.P.	Purchase	1,315	1/14/2013	$	49.74	Open Market
Relational Investors XXIII, L.P.	Purchase	5,181	1/14/2013	$	49.66	Open Market
Relational Investors XXIII, L.P.	Purchase	1,872	1/14/2013	$	49.74	Open Market
Relational Coast Partners, L.P.	Purchase	26	1/15/2013	$	49.74	Open Market
Relational Coast Partners, L.P.	Purchase	6,346	1/15/2013	$	49.74	Open Market
Relational Fund Partners, L.P.	Purchase	626	1/15/2013	$	49.74	Open Market
Relational Investors IX, L.P.	Purchase	12,560	1/15/2013	$	49.74	Open Market
Relational Investors LLC	Purchase	8,508	1/15/2013	$	49.74	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	79,154	1/15/2013	$	49.74	Open Market
Relational Investors XV, L.P.	Purchase	6,103	1/15/2013	$	49.74	Open Market
Relational Investors XX, L.P.	Purchase	5,194	1/15/2013	$	49.74	Open Market
Relational Investors XXIII, L.P.	Purchase	7,398	1/15/2013	$	49.74	Open Market
Relational Coast Partners, L.P.	Purchase	24	1/16/2013	$	49.60	Open Market
Relational Coast Partners, L.P.	Purchase	5,943	1/16/2013	$	49.60	Open Market
Relational Fund Partners, L.P.	Purchase	588	1/16/2013	$	49.60	Open Market
Relational Investors IX, L.P.	Purchase	11,762	1/16/2013	$	49.60	Open Market
Relational Investors LLC	Purchase	7,967	1/16/2013	$	49.60	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	74,113	1/16/2013	$	49.60	Open Market
Relational Investors XV, L.P.	Purchase	5,715	1/16/2013	$	49.60	Open Market
Relational Investors XX, L.P.	Purchase	4,864	1/16/2013	$	49.60	Open Market
Relational Investors XXIII, L.P.	Purchase	6,927	1/16/2013	$	49.60	Open Market
Relational Investors LLC	Purchase	3,318	1/17/2013	$	50.43	Open Market
Relational Coast Partners, L.P.	Purchase	10	1/17/2013	$	50.43	Open Market
Relational Coast Partners, L.P.	Purchase	2,475	1/17/2013	$	50.43	Open Market
Relational Fund Partners, L.P.	Purchase	244	1/17/2013	$	50.43	Open Market
Relational Investors IX, L.P.	Purchase	4,898	1/17/2013	$	50.43	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	30,869	1/17/2013	$	50.43	Open Market
Relational Investors XV, L.P.	Purchase	2,380	1/17/2013	$	50.43	Open Market
Relational Investors XX, L.P.	Purchase	2,026	1/17/2013	$	50.43	Open Market
Relational Investors XXIII, L.P.	Purchase	2,885	1/17/2013	$	50.43	Open Market

Relational Investors LLC	Purchase	2,632	1/18/2013	$	50.45	Open Market
Relational Investors LLC	Purchase	2,798	1/18/2013	$	50.71	Open Market
Relational Investors LLC	Purchase	1,887	1/18/2013	$	50.78	Open Market
Relational Coast Partners, L.P.	Purchase	8	1/18/2013	$	50.46	Open Market
Relational Coast Partners, L.P.	Purchase	9	1/18/2013	$	50.71	Open Market
Relational Coast Partners, L.P.	Purchase	7	1/18/2013	$	50.78	Open Market
Relational Coast Partners, L.P.	Purchase	1,965	1/18/2013	$	50.45	Open Market
Relational Coast Partners, L.P.	Purchase	2,086	1/18/2013	$	50.71	Open Market
Relational Coast Partners, L.P.	Purchase	1,406	1/18/2013	$	50.78	Open Market
Relational Fund Partners, L.P.	Purchase	193	1/18/2013	$	50.45	Open Market
Relational Fund Partners, L.P.	Purchase	210	1/18/2013	$	50.71	Open Market
Relational Fund Partners, L.P.	Purchase	140	1/18/2013	$	50.78	Open Market
Relational Investors IX, L.P.	Purchase	3,885	1/18/2013	$	50.45	Open Market
Relational Investors IX, L.P.	Purchase	2,891	1/18/2013	$	50.71	Open Market
Relational Investors IX, L.P.	Purchase	1,239	1/18/2013	$	50.71	Open Market
Relational Investors IX, L.P.	Purchase	2,785	1/18/2013	$	50.78	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	24,474	1/18/2013	$	50.45	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	26,020	1/18/2013	$	50.71	Open Market
Relational Investors Mid-Cap Fund II, L.P.	Purchase	17,540	1/18/2013	$	50.78	Open Market
Relational Investors XV, L.P.	Purchase	1,887	1/18/2013	$	50.45	Open Market
Relational Investors XV, L.P.	Purchase	2,007	1/18/2013	$	50.71	Open Market
Relational Investors XV, L.P.	Purchase	1,354	1/18/2013	$	50.78	Open Market
Relational Investors XX, L.P.	Purchase	1,608	1/18/2013	$	50.45	Open Market
Relational Investors XX, L.P.	Purchase	1,708	1/18/2013	$	50.71	Open Market
Relational Investors XX, L.P.	Purchase	1,151	1/18/2013	$	50.78	Open Market
Relational Investors XXIII, L.P.	Purchase	2,290	1/18/2013	$	50.45	Open Market
Relational Investors XXIII, L.P.	Purchase	2,432	1/18/2013	$	50.71	Open Market
Relational Investors XXIII, L.P.	Purchase	1,639	1/18/2013	$	50.78	Open Market