SELECTIVE INSURANCE GROUP INC - Common Stock, par value $2 per share (SIGI)

Q: What does CUSIP 816300107 represent in this 13F holders report?

CUSIP 816300107 is the security identifier for SIGI - SELECTIVE INSURANCE GROUP INC - Common Stock, par value $2 per share used to aggregate holder disclosures.

Q: How many institutions held SIGI - SELECTIVE INSURANCE GROUP INC - Common Stock, par value $2 per share in Q1 2026?

374 institutional investors reported SIGI - SELECTIVE INSURANCE GROUP INC - Common Stock, par value $2 per share for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: 816300107

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Common Stock, par value $2 per share
Total 13F shares: 50,911,466
Total 13F value: $3,839,476,909
Share change: -1,808,422
Put/Call ratio: 291%
SEC-reported price per share: $75.39
Number of holders: 374
Value change: -$147,646,955
Number of buys: 181
Number of sells: 177
Shares outstanding: 59,841,324

Security key

816300107

Report period

Q1 2026

Institutions

374

Top holders

SIGI full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 SELECTIVE INSURANCE GROUP INC SEC filings SELECTIVE INSURANCE GROUP INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 816300107

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of SIGI - SELECTIVE INSURANCE GROUP INC - Common Stock, par value $2 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

VANGUARD PORTFOLIO MANAGE...

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

31 Mar 2026

13D/G 13F 3/4/5 Lead comparable stake: 5.9% 13D/G row: VANGUARD PORTFOLIO MANAGEMENT LLC Showing 1-6 of 15 holder rows.

Quick read

VANGUARD PORTFOLIO MANAGEMENT LLC leads the comparable SEC ownership view at 5.9%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens VANGUARD PORTFOLIO MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

VANGUARD PORTFOLIO MANAGEMENT LLC 5.9%

VANGUARD CAPITAL MANAGEMENT LLC 5.2%

FMR LLC 4.2%

John J. Marchioni 0.28%

Jeffrey F. Kamrowski 0.13%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
VANGUARD PORTFOLIO MANAGEMENT LLC	13D/G Vanguard Portfolio Management 13D/G	5.9%	$265,051,789 3,515,742 shares	$0	31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	13D/G Vanguard Capital Management 13D/G	5.2%	$236,856,005 3,141,743 shares	$0	31 Mar 2026
FMR LLC	13F 13D/G Company 13F 13D/G	4.2% from 13D/G	$412,910,862 4,934,993 shares	—	31 Dec 2025
John J. Marchioni	3/4/5 President and CEO, Director 3/4/5	0.28%	$13,974,578 167,098 shares	—	06 Feb 2026
Jeffrey F. Kamrowski	3/4/5 EVP, MUSIC 3/4/5	0.13%	$7,203,943 79,955 shares	—	06 Feb 2026
Patrick Sean Brennan	3/4/5 EVP, Chief Financial Officer 3/4/5	0.03%	$1,367,116 17,948 shares	+$205,659	24 Oct 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

374

50,911,466

Rows available

374

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

374

Q1 2026 holders

374

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend