HPHTF - Hamamatsu Photonics K.K. Stock - Stock Price, Institutional Ownership, Shareholders (OTCPK)

Hamamatsu Photonics K.K.
US ˙ OTCPK ˙ JP3771800004

Basic Stats
Institutional Owners 95 total, 90 long only, 5 short only, 0 long/short - change of -23.20% MRQ
Average Portfolio Allocation 0.1199 % - change of 8.15% MRQ
Shares Outstanding shares (source: Capital IQ)
Institutional Shares (Long) 27,056,837 - 9.06% (ex 13D/G) - change of -7.70MM shares -22.14% MRQ
Institutional Value (Long) $ 270,111 USD ($1000)
Institutional Ownership and Shareholders

Hamamatsu Photonics K.K. (US:HPHTF) has 95 institutional owners and shareholders that have filed 13D/G or 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 27,589,337 shares. Largest shareholders include TROSX - T. Rowe Price Overseas Stock Fund, VGTSX - Vanguard Total International Stock Index Fund Investor Shares, VTMGX - Vanguard Developed Markets Index Fund Admiral Shares, PRITX - T. Rowe Price International Stock Fund, IEFA - iShares Core MSCI EAFE ETF, SCZ - iShares MSCI EAFE Small-Cap ETF, SMCWX - SMALLCAP WORLD FUND INC Class A, PRCNX - T. Rowe Price International Disciplined Equity Fund, SCHF - Schwab International Equity ETF, and VEU - Vanguard FTSE All-World ex-US Index Fund ETF Shares .

Hamamatsu Photonics K.K. (OTCPK:HPHTF) institutional ownership structure shows current positions in the company by institutions and funds, as well as latest changes in position size. Major shareholders can include individual investors, mutual funds, hedge funds, or institutions. The Schedule 13D indicates that the investor holds (or held) more than 5% of the company and intends (or intended) to actively pursue a change in business strategy. Schedule 13G indicates a passive investment of over 5%.

HPHTF / Hamamatsu Photonics K.K. Institutional Ownership
Fund Sentiment Score

The Fund Sentiment Score (fka Ownership Accumulation Score) finds the stocks that are being most bought by funds. It is the result of a sophisticated, multi-factor quantitative model that identifies companies with the highest levels of institutional accumulation. The scoring model uses a combination of the total increase in disclosed owners, the changes in portfolio allocations in those owners and other metrics. The number ranges from 0 to 100, with higher numbers indicating a higher level of accumulation to its peers, and 50 being the average.

Update Frequency: Daily

See Ownership Explorer, which provides a list of highest-ranking companies.

Institutional Put/Call Ratio

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

HPHTF / Hamamatsu Photonics K.K. Historical Put/Call Ratio
13F and NPORT Filings

Detail on 13F filings are free. Detail on NP filings require a premium membership. Green rows indicate new positions. Red rows indicate closed positions. Click the link icon to see the full transaction history.

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File Date Source Investor Type Avg Price
(Est)
Shares Δ Shares
(%)
Reported
Value
($1000)
Δ Value
(%)
Port Alloc
(%)
2025-08-22 NP VARIABLE INSURANCE PRODUCTS FUND II - International Index Portfolio Initial Class 7,400 12.12 90 40.63
2025-06-26 NP IEFA - iShares Core MSCI EAFE ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 1,898,500 1.83 17,556 -23.70
2025-06-26 NP DFSI - Dimensional International Sustainability Core 1 ETF 2,700 -71.58 25 -79.49
2025-06-26 NP IXUS - iShares Core MSCI Total International Stock ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 297,800 0.00 2,754 -25.09
2025-07-22 NP GTEK - Goldman Sachs Future Tech Leaders Equity ETF 200,779 -1.48 2,162 2.56
2025-06-26 NP DFIEX - International Core Equity Portfolio - Institutional Class This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 533,298 7.69 4,931 -19.31
2025-06-27 NP SUNAMERICA SERIES TRUST - SA T. Rowe Price VCP Balanced Portfolio Class 3 44,400 0.00 410 -25.05
2025-06-27 NP DFA INVESTMENT DIMENSIONS GROUP INC - International Social Core Equity Portfolio Institutional Class This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 37,000 -26.88 342 -45.19
2025-06-26 NP FSISX - Fidelity SAI International Small Cap Index Fund 81,100 -5.15 749 -29.00
2025-08-20 NP QSPIX - AQR Style Premia Alternative Fund Class I Short -56,200 -76.60 -683 -70.87
2025-06-26 NP DFAX - Dimensional World ex U.S. Core Equity 2 ETF 72,900 3.99 675 -22.44
2025-07-22 NP DIEFX - Destinations International Equity Fund Class I 5,400 -95.32 58 -95.27
2025-07-29 NP SSEAX - SIIT Screened World Equity Ex-US Fund - Class A 6,700 72
2025-06-30 NP VGTSX - Vanguard Total International Stock Index Fund Investor Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 4,091,532 15.09 37,835 -13.77
2025-07-28 NP AVDE - Avantis International Equity ETF This fund is a listed as child fund of American Century Companies Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 42,800 0.00 459 3.15
2025-08-27 NP VTMGX - Vanguard Developed Markets Index Fund Admiral Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 2,546,894 -0.67 30,943 23.79
2025-03-28 NP JIG - JPMorgan International Growth ETF 36,400 10.64 449 3.22
2025-08-27 NP ARTJX - Artisan International Small-Mid Fund Investor Shares 341,500 -79.89 4,164 -74.91
2025-06-26 NP DFALX - Large Cap International Portfolio - Institutional Class This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 131,800 0.00 1,219 -25.09
2025-06-30 NP VT - Vanguard Total World Stock Index Fund ETF Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 228,600 56.15 2,114 17.00
2025-07-22 NP GXUS - Goldman Sachs MarketBeta(R) Total International Equity ETF 4,642 0.00 50 4.26
2025-06-26 NP FPBFX - Fidelity Pacific Basin Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 574,700 0.00 5,308 -25.17
2025-08-27 NP JNL SERIES TRUST - JNL/DFA International Core Equity Fund (I) 77,600 312.77 940 405.38
2025-06-25 NP PRCNX - T. Rowe Price International Disciplined Equity Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 759,400 -2.21 7,022 -26.73
2025-08-27 NP IEGAX - INVESCO International Small Company Fund Class A 585,000 0.00 7,107 24.64
2025-06-25 NP HFXI - IQ 50 Percent Hedged FTSE International ETF 21,501 -2.53 199 -27.11
2025-06-30 NP VEU - Vanguard FTSE All-World ex-US Index Fund ETF Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 605,424 17.94 5,598 -11.63
2025-08-21 NP MXIGX - Great-West International Growth Fund Investor Class 91,500 -14.80 1,112 6.21
2025-07-29 NP TRPBX - T. Rowe Price Spectrum Moderate Allocation Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 46,500 -1.90 499 1.01
2025-06-26 NP DFIC - Dimensional International Core Equity 2 ETF 38,502 -73.79 356 -80.46
2025-08-06 NP LINCOLN VARIABLE INSURANCE PRODUCTS TRUST - LVIP Dimensional International Core Equity Fund Standard Class 10,100 0.00 123 24.49
2025-06-24 NP SFILX - Schwab Fundamental International Small Company Index Fund Institutional Shares This fund is a listed as child fund of Charles Schwab Investment Management Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 42,400 21.84 392 -8.62
2025-08-20 NP QRPNX - AQR Alternative Risk Premia Fund Class N Short -9,300 -70.19 -113 -63.16
2025-08-25 NP SMCWX - SMALLCAP WORLD FUND INC Class A 773,800 0.00 9,436 24.80
2025-08-26 NP FLJP - Franklin FTSE Japan ETF 123,200 -5.08 1,498 18.43
2025-08-20 NP QLEIX - AQR Long-Short Equity Fund Class I Short -146,500 -87.43 -1,780 -84.34
2025-08-15 NP Guardian Variable Products Trust - Guardian International Growth VIP Fund 23,800 -8.46 289 13.39
2025-06-26 NP OWSMX - Old Westbury Small & Mid Cap Strategies Fund 61,200 -81.27 566 -85.98
2025-06-26 NP FSTSX - Fidelity Series International Small Cap Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 250,000 0.00 2,309 -25.19
2025-06-26 NP SCZ - iShares MSCI EAFE Small-Cap ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 953,800 2.53 8,820 -23.19
2025-07-29 NP TRSGX - T. Rowe Price Spectrum Moderate Growth Allocation Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 112,700 0.00 1,209 3.16
2025-06-25 NP TOUS - T. Rowe Price International Equity ETF 0 -100.00 0 -100.00
2025-06-26 NP FJPNX - Fidelity Japan Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 371,600 0.00 3,432 -25.19
2025-07-24 NP Blackrock Funds - Blackrock Advantage International Fund Institutional Class This fund is a listed as child fund of BlackRock, Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 45,100 7,416.67 484 1,510.00
2025-08-26 NP EQ ADVISORS TRUST - EQ/International Value Managed Volatility Portfolio Class IB 10,400 0.00 127 26.00
2025-06-26 NP DXIV - Dimensional International Vector Equity ETF 3,100 0.00 29 -26.32
2025-07-28 NP AVDEX - Avantis International Equity Fund Institutional Class This fund is a listed as child fund of American Century Companies Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 2,600 0.00 28 0.00
2025-07-28 NP AVSD - Avantis Responsible International Equity ETF 2,000 0.00 21 5.00
2025-07-29 NP VSGX - Vanguard ESG International Stock ETF ETF Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 51,800 9.05 556 12.35
2025-06-26 NP DFA INVESTMENT DIMENSIONS GROUP INC - International Sustainability Core 1 Portfolio Shares This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 64,700 27.36 598 -4.47
2025-07-30 NP FILFX - Strategic Advisers International Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 231,800 3.99 2,503 7.89
2025-05-30 NP QAAGYX - T. Rowe Price International Stock Portfolio This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 91,700 0.00 894 -12.37
2025-07-29 NP WEUSX - Siit World Equity Ex-us Fund - Class A 26,300 281
2025-07-29 NP PRSIX - T. Rowe Price Spectrum Conservative Allocation Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 29,800 -1.00 320 1.92
2025-07-25 NP SCHF - Schwab International Equity ETF This fund is a listed as child fund of Charles Schwab Investment Management Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 620,929 26.12 6,685 31.34
2025-08-28 NP QCSTRX - Stock Account Class R1 236,200 -8.34 2,870 14.21
2025-06-26 NP FZILX - Fidelity ZERO International Index Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 49,200 7.89 454 -19.22
2025-08-27 NP SEASONS SERIES TRUST - SA Multi-Managed International Equity Portfolio Class 1 18,200 22.15 221 51.72
2025-07-25 NP FNDC - Schwab Fundamental International Small Company Index ETF This fund is a listed as child fund of Charles Schwab Investment Management Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 200,930 3.23 2,163 7.50
2025-07-25 NP SCJ - iShares MSCI Japan Small-Cap ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 33,000 -6.25 354 -3.28
2025-06-24 NP TLTD - FlexShares Morningstar Developed Markets ex-US Factor Tilt Index Fund This fund is a listed as child fund of Northern Trust Corp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 5,400 0.00 50 -26.87
2025-06-26 NP IDEV - iShares Core MSCI International Developed Markets ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 235,500 5.51 2,178 -20.95
2025-06-25 NP PRITX - T. Rowe Price International Stock Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 2,418,200 -53.40 22,361 -65.09
2025-06-26 NP FJSCX - Fidelity Japan Smaller Companies Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 345,700 0.00 3,193 -25.18
2025-05-27 NP GIEYX - INTERNATIONAL EQUITY FUND Institutional -149 4.20
2025-06-25 NP TROSX - T. Rowe Price Overseas Stock Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 4,214,300 -0.09 38,970 -25.14
2025-03-26 NP DFA INVESTMENT DIMENSIONS GROUP INC - International Vector Equity Portfolio Shares This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 24,500 -36.36 302 -40.67
2025-08-28 NP SPDW - SPDR(R) Portfolio Developed World ex-US ETF This fund is a listed as child fund of State Street Corp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 494,600 3.73 6,013 29.49
2025-06-30 NP PDN - Invesco FTSE RAFI Developed Markets ex-U.S. Small-Mid ETF This fund is a listed as child fund of Invesco Ltd. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 26,368 -4.99 244 -28.86
2025-08-25 NP MMIUX - MassMutual Select T. Rowe Price International Equity Fund Class I 20,700 -66.67 251 -58.75
2025-06-26 NP IPAC - iShares Core MSCI Pacific ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 85,300 0.00 789 -25.10
2025-08-20 NP AQMIX - AQR Managed Futures Strategy Fund Class I Short -180,200 -58.33 -2,189 -48.07
2025-08-27 NP Jnl Series Trust - Jnl/t. Rowe Price Managed Volatility Balanced Fund (a) 18,200 0.00 220 22.22
2025-07-29 NP RBB FUND, INC. - Aquarius International Fund 79,900 0.00 857 3.13
2025-08-27 NP ALLIANZ VARIABLE INSURANCE PRODUCTS TRUST - AZL DFA International Core Equity Fund 3,300 0.00 40 25.00
2025-06-30 NP VPACX - Vanguard Pacific Stock Index Fund Investor Shares This fund is a listed as child fund of Vanguard Group Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 342,278 10.74 3,165 -17.02
2025-03-27 NP ITTAX - Hartford Multi-Asset Income and Growth Fund Class A 0 -100.00 0 -100.00
2025-03-21 NP PCIEX - PACE International Equity Investments Class P 0 -100.00 0 -100.00
2025-06-27 NP EAISX - Parametric International Equity Fund Investor Class 7,200 0.00 67 -25.00
2025-08-20 NP QMNIX - AQR Equity Market Neutral Fund Class I Short -140,300 -70.64 -1,705 -63.41
2025-08-26 NP QAAGRX - T. Rowe Price Moderate Allocation Portfolio This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 4,900 0.00 60 25.53
2025-06-25 NP RPGAX - T. Rowe Price Global Allocation Fund, Inc. This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 8,600 -55.44 80 -66.81
2025-08-26 NP JPXN - iShares JPX-Nikkei 400 ETF This fund is a listed as child fund of BlackRock Inc. and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 8,000 0.00 97 25.97
2025-06-26 NP FTIHX - Fidelity Total International Index Fund This fund is a listed as child fund of Fmr Llc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 130,568 0.77 1,206 -24.64
2025-08-15 NP MBEQX - M International Equity Fund 1,800 0.00 22 23.53
2025-06-27 NP SUNAMERICA SERIES TRUST - SA T. Rowe Price Asset Allocation Growth Portfolio Class 1 22,900 0.00 211 -25.18
2025-06-25 NP BKIE - BNY Mellon International Equity ETF 9,200 5.75 85 -20.56
2025-06-24 NP SWMIX - Laudus International MarketMasters Fund Select Shares This fund is a listed as child fund of Charles Schwab Investment Management Inc and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 6,100 10.91 56 -16.42
2025-06-26 NP DFA INVESTMENT DIMENSIONS GROUP INC - World ex U.S. Core Equity Portfolio Institutional Class Shares This fund is a listed as child fund of Dimensional Fund Advisors Lp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 59,500 3.48 550 -22.43
2025-06-26 NP DFAI - Dimensional International Core Equity Market ETF 123,500 -7.42 1,143 -30.94
2025-08-26 NP EQ ADVISORS TRUST - EQ/International Equity Index Portfolio Class IA 26,724 0.00 326 25.48
2025-07-25 NP WSML - iShares MSCI World Small-Cap ETF 18,200 195
2025-06-25 NP TGPEX - T. Rowe Price Global Impact Equity Fund 24,200 -5.47 224 -29.21
2025-08-26 NP FLJH - Franklin FTSE Japan Hedged ETF 5,400 -3.57 66 20.37
2025-08-20 NP QMHIX - AQR Managed Futures Strategy HV Fund Class I 0 -100.00 0 -100.00
2025-04-01 NP PRJPX - T. Rowe Price Japan Fund This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 171,800 -3.81 2,120 -10.21
2025-08-20 NP QNZNX - AQR Sustainable Long-Short Equity Carbon Aware Fund Class N 0 -100.00 0 -100.00
2025-06-26 NP ETISX - E*TRADE No Fee International Index Fund 200 2
2025-07-22 NP GSID - Goldman Sachs MarketBeta International Equity ETF 12,568 -3.56 135 0.75
2025-08-26 NP RPBAX - T. Rowe Price Balanced Fund, Inc. This fund is a listed as child fund of Price T Rowe Associates Inc /md/ and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 159,000 0.00 1,932 24.58
2025-08-28 NP SSGVX - State Street Global Equity ex-U.S. Index Portfolio State Street Global All Cap Equity ex-U.S. Index Portfolio This fund is a listed as child fund of State Street Corp and if that institution has disclosed ownership in this security, then these positions will not be double counted when calculating total shares and total value 89,600 0.00 1,089 24.32
Other Listings
JP:6965 ¥1,522.50
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