IOSPInnospec Inc.

$95.59+23% 1Y

Who owns IOSP

279 institutions reported holding IOSP for 2026Q2, together 99% of the company, more than the 263 a quarter earlier.

279

Institutions reporting a position · as of 2026Q2 · up from 263 the quarter before

Shares held by institutions
24.5M

Shares held by institutions · 99% of the company · long US equity positions only, as reported on Form 13F

Reported value
$1.99B

Reported value · at Jun 30, 2026 prices, not today's

Top 5 holders
47%

Top 5 holders · of the whole company, between five filers

Details›
Reporting quarter2026-06-30
2026Q2
Quarters on record
53
New positions
46
Positions exited
30
Added to
95
Reduced
91
Top 10 holdersof the company
61%
Shares sold shortsettled Sep 15, 2026
0.5M
Short interestof shares outstanding
2.1%
Days to coverat the average daily volume
3.4
Change in the short positionsince the Aug 31, 2026 count
+9.5%
Institutional ownership by quarter, 2013Q2 to 2026Q2
QuarterFilersSharesReported value
2026Q227924.5M$1.99B
2026Q126324.9M$1.82B
2025Q425424.3M$1.86B
2025Q326624.0M$1.85B
2025Q225924.0M$2.03B
2025Q126924.5M$2.29B
2024Q425823.8M$2.61B
2024Q325724.1M$2.72B
2024Q226323.9M$2.96B
2024Q123424.0M$3.09B
2023Q422023.9M$2.95B
2023Q320723.8M$2.43B
2023Q220123.8M$2.39B
2023Q121423.8M$2.45B
2022Q421923.7M$2.44B
2022Q318923.7M$2.03B
Largest reported holders, 2026Q2
HolderShares% of companyValue
BlackRock Inc.4.4M18%$357M
VANGUARD GROUP INC3.2M13%$260M
WELLS FARGO & COMPANY/MN1.9M7.7%$157M
DIMENSIONAL FUND ADVISORS LP1.3M5.3%$106M
STATE STREET CORP1.0M4.0%$81M
Nuveen Asset Management, LLC0.8M3.0%$62M
GEODE CAPITAL MANAGEMENT LLC0.7M2.7%$54M
GOLDMAN SACHS GROUP INC0.7M2.7%$54M
VICTORY CAPITAL MANAGEMENT INC0.7M2.7%$54M
TWO SIGMA INVESTMENTS, LP0.6M2.3%$46M
Short interest by settlement date, Aug 29, 2025 to Sep 15, 2026
SettlementShares shortOf shares outstandingDays to cover
Sep 15, 20260.5M2.1%3.4
Aug 31, 20260.5M1.9%2.8
Aug 14, 20260.5M1.9%2.4
Jul 31, 20260.5M1.8%3.0
Jul 15, 20260.5M2.0%3.7
Jun 30, 20260.5M2.0%2.0
Jun 15, 20260.4M1.6%2.2
May 29, 20260.4M1.5%2.1
May 15, 20260.3M1.4%1.2
Apr 30, 20260.5M2.0%3.2
Apr 15, 20260.5M1.9%2.1
Mar 31, 20260.4M1.6%1.1

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold. The short position is FINRA's consolidated count for each twice-monthly settlement date, as a share of shares outstanding.

opening the register…