SRB CORP

BOSTON, MA · CIK 1496228 · 13F filing filed 2026-08-14

SEC-registered investment adviser since 2012 · corporation

Assets managed$4.8bn
Staff4 · 2 in investment roles
Main clients (by assets)Insurers 95%, Companies 5%
Form ADV · 2026-03-30SEC adviser record

Kindinstitutions
Others nearbyBoston, MA

$1.9bn reported value +14.2% vs Q1 2026

23positions

70.3%in top 10

0 new 3 added 7 reduced 0 sold out vs Q1 2026

This report includes the holdings of 2 other managers that share the investment decisions:

Palisades Safety & Insurance Association – reports through this filing
Plymouth Rock Co Inc – reports through this filing

Shares in two reports are counted once in each security's totals.

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	SELECT SECTOR SPDR TR TECHNOLOGY XLK	XLK	1,200,431	$228.7m12.30%	12.30%	Added +347.0k	+347,007 40.7%
2	MICROSOFT CORP COM MSFT	MSFT	568,388	$212.0m11.40%	11.40%	Reduced -7.2k	-7,161 -1.2%
3	INTEL CORP COM INTC	INTC	1,067,407	$149.0m8.02%	8.02%	Reduced -1.1m	-1,079,008 -50.3%
4	SAFETY INS GROUP INC COM SAFT	SAFT	1,794,655	$134.3m7.23%	7.23%	Unchanged
5	RENAISSANCERE HLDGS LTD COM RNR	RNR	388,478	$123.1m6.62%	6.62%	Unchanged
6	AMAZON COM INC COM AMZN	AMZN	450,434	$107.4m5.77%	5.77%	Unchanged
7	GRAINGER W W INC COM GWW	GWW	66,861	$91.0m4.89%	4.89%	Unchanged
8	SELECT SECTOR SPDR TR SBI HEALTHCARE XLV	XLV	556,818	$88.3m4.75%	4.75%	Unchanged
9	SELECT SECTOR SPDR TR SBI MATERIALS XLB	XLB	1,729,580	$87.9m4.73%	4.73%	Unchanged
10	SELECT SECTOR SPDR TR COMMUNICATION XLC	XLC	800,774	$85.8m4.61%	4.61%	Unchanged
11	ALPHABET INC CAP STK CL A GOOGL	GOOGL	228,868	$81.8m4.40%	4.40%	Reduced -1.1k	-1,123 -0.5%
12	MERCK & CO INC COM MRK	MRK	463,298	$59.5m3.20%	3.20%	Unchanged
13	SELECT SECTOR SPDR TR INDL XLI	XLI	310,583	$57.5m3.09%	3.09%	Added +277.0k	+276,962 823.8%
14	CVS HEALTH CORP COM CVS	CVS	506,016	$52.3m2.82%	2.82%	Unchanged
15	TOYOTA MOTOR CORP ADS TM	TM	291,689	$49.1m2.64%	2.64%	Reduced -126	-126 -0.0%
16	GE AEROSPACE COM NEW GE	GE	119,925	$44.8m2.41%	2.41%	Reduced -181.0k	-180,986 -60.1%
17	SELECT SECTOR SPDR TR SBI CONS STPLS XLP	XLP	488,831	$40.6m2.18%	2.18%	Added +429.2k	+429,247 720.4%
18	SHERWIN WILLIAMS CO COM SHW	SHW	110,041	$37.9m2.04%	2.04%	Unchanged
19	RELIANCE INC COM RS	RS	95,976	$35.9m1.93%	1.93%	Unchanged
20	COMCAST CORP NEW CL A CMCSA	CMCSA	1,096,685	$26.9m1.45%	1.45%	Unchanged
21	PROCTER AND GAMBLE CO COM PG	PG	165,402	$24.3m1.30%	1.30%	Reduced -67.5k	-67,522 -29.0%
22	WALMART INC COM WMT	WMT	202,248	$22.9m1.23%	1.23%	Reduced -418.3k	-418,331 -67.4%
23	SELECT SECTOR SPDR TR SBI CONS DISCR XLY	XLY	154,540	$18.1m0.97%	0.97%	Unchanged

Trades reported as a company insider since 1 Apr 2026

Owning 10% or more of a company, or having someone on its board, makes this manager an insider there: it reports its trades in that company's shares on Form 4 within two business days. Open-market and private purchases and sales only.

Date	Company	Ticker	Trade	Shares	Value	Their holding
2026-07-27	SAFETY INS GROUP INC 10% owner · See	SAFT	Sold	1,240,352	$127.8m1.2m shares	-72%
2026-07-24	SAFETY INS GROUP INC 10% owner · See	SAFT	Sold	38,835	$4.0m38.8k shares	-2%
2026-07-17	SAFETY INS GROUP INC 10% owner · See	SAFT	Sold	5,159	$392.2k5.2k shares	-<1%
2026-07-13	SAFETY INS GROUP INC 10% owner · See	SAFT	Sold	34,272	$2.6m34.3k shares	-2%
2026-07-09	SAFETY INS GROUP INC 10% owner · See	SAFT	Sold	2,650	$202.8k2.6k shares	-<1%