MAPLIGHT THERAPEUTICS INC MPLT
COM · Common Stock · CUSIP 56565P103
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersRedwood City, CA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($21.9m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $35.84. Options: 0 managers hold calls (— notional), 2 hold puts ($906.8k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q4 2025 | 74 |
| Q1 2026 | 81 |
| Q2 2026 | 106 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2026 | 44 | 27 |
| Q2 2026 | 56 | 40 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $0 | — |
| Q4 2025 | $0 | $0 | — |
| Q1 2026 | $0 | $0 | — |
| Q2 2026 | $0 | $906.8k | — |
Biggest buyers
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +1.3m |
| Paradigm Biocapital Advisors LP | New | +685.9k |
| FMR LLC | Added | +619.1k |
| STATE STREET CORP | Added | +513.0k |
| Capital World Investors | New | +415.7k |
| MILLENNIUM MANAGEMENT LLC | New | +128.8k |
| Boxer Capital Management, LLC | New | +75.0k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +64.3k |
| Trexquant Investment LP | New | +63.8k |
| HRT FINANCIAL LP | New | +52.0k |
Biggest sellers
| Vestal Point Capital, LP | Sold out | -420.0k |
| ADAR1 Capital Management, LLC | Reduced | -348.4k |
| BlackRock, Inc. | Reduced | -314.6k |
| Blue Owl Capital Holdings LP | Reduced | -276.0k |
| RA CAPITAL MANAGEMENT, L.P. | Sold out | -248.3k |
| Board of Trustees of The Leland Stanford Junior University | Sold out | -199.2k |
| Freestone Grove Partners LP | Reduced | -145.0k |
| UBS Group AG | Reduced | -114.5k |
| Tetragon Partners GP Ltd | Sold out | -112.1k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | -96.9k |
Biggest calls
| None |
Biggest puts
| CITADEL ADVISORS LLC | New | $609.3k17.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $297.5k8.3k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Catalyst4, Inc.
13D · may seek influence
+2.0 pts · filed 2026-08-18
Stated purposeItem 4 of the Original Schedule 13D is hereby amended as follows: On August 13, 2026, Catalyst entered into a securities purchase agreement, which is filed as Exhibit 99.4 to this Statement ("Securities Purchase Agreement") with the Issuer, pursuant to which the Catalyst agreed to purchase an aggregate of (i) 4,400,000 shares of the Issuer's voting common stock and (ii) accompanying pre-funded warrants to purchase up to 2,928,686 shares of voting common stock (the "Pre-Funded Warrants"), which is filed as Exhibit 99.5 to this Statement (the "PIPE Offering"). The purchase price per share of voting common stock is $11.38 per share (the "Purchase Price") and the purchase price for the Pre-Funded Warrants is the Purchase Price minus $0.0001 per share underlying the Pre-Funded Warrants. The P… Full filing |
49.9% |
| T. Rowe Price Investment Management, Inc. 13G · institution +1.2 pts · filed 2026-05-15 | 7.4% |
| Forbion Growth Opportunities Fund III Cooperatief U.A. 13G · exempt (held before listing) new · filed 2026-02-17 | 7.1% |
| Pivotal bioVenture Partners Fund II, L.P. 13G · passive investor new · filed 2026-08-20 | 5.5% |
Fell to 5% or below in the last year: Novo Holdings A/S (4.9%, 2026-07-31)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 2 | $693.8k | 1 | $1.4m | — |
| Q2 2026 | 0 | — | 8 | $16.2m | $15.1m |
| Q3 2026 | 1 | $148.7k | 6 | $11.6m | $4.9m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-16 | Hanson Kristopher General Counsel | Sold plan | $192.7k16.5k shares |
| 2026-08-14 | Catalyst4, Inc. 10% owner · See footnote | Bought | $50.1m4.4m shares |
| 2026-08-03 | Lillie James Woodruff Chief Scientific Officer | Sold plan | $276.9k22.1k shares |
| 2026-07-30 | Catalyst4, Inc. 10% owner · See footnote | Bought | $13.0m1.0m shares |
| 2026-07-29 | Catalyst4, Inc. 10% owner · See footnote | Bought | $37.9k3.0k shares |
| 2026-07-28 | Catalyst4, Inc. 10% owner · See footnote | Bought | $2.3m206.2k shares |
| 2026-07-28 | Cox Troy Director · By trust | Bought | $148.7k15.6k shares |
| 2026-07-17 | GILLIS JONATHAN CAO and Interim CFO | Sold plan | $694.5k18.5k shares |
| 2026-07-17 | Kreitzer Anatol Chief Discovery Officer | Sold plan | $645.7k17.2k shares |
| 2026-07-17 | Kroeger Christopher A. Chief Executive Officer, director | Sold | $635.9k16.8k shares |
| 2026-07-17 | Foff Erin Pennock Chief Medical Officer | Sold plan | $138.6k3.7k shares |
| 2026-07-17 | Lillie James Woodruff Chief Scientific Officer | Sold | $78.7k2.1k shares |
| 2026-07-17 | Hanson Kristopher General Counsel | Sold | $42.8k1.1k shares |
| 2026-07-16 | Kroeger Christopher A. Chief Executive Officer, director | Sold | $2.5m69.1k shares |
| 2026-07-16 | Foff Erin Pennock Chief Medical Officer | Sold plan | $553.3k15.0k shares |
| 2026-07-16 | Kreitzer Anatol Chief Discovery Officer | Sold plan | $333.2k9.1k shares |
| 2026-07-16 | Lillie James Woodruff Chief Scientific Officer | Sold | $314.4k8.5k shares |
| 2026-07-16 | GILLIS JONATHAN CAO and Interim CFO | Sold plan | $311.1k8.5k shares |
| 2026-07-16 | Hanson Kristopher General Counsel | Sold | $298.6k8.1k shares |
| 2026-07-15 | Kroeger Christopher A. Chief Executive Officer, director | Sold | $2.3m61.8k shares |
| 2026-07-15 | Foff Erin Pennock Chief Medical Officer | Sold plan | $1.0m28.5k shares |
| 2026-07-15 | GILLIS JONATHAN CAO and Interim CFO | Sold plan | $367.1k10.1k shares |
| 2026-07-15 | Kreitzer Anatol Chief Discovery Officer | Sold plan | $366.9k10.1k shares |
| 2026-07-15 | Lillie James Woodruff Chief Scientific Officer | Sold | $280.5k7.6k shares |
| 2026-07-15 | Hanson Kristopher General Counsel | Sold | $266.4k7.3k shares |
| 2026-05-18 | Kroeger Christopher A. Chief Executive Officer, director | Sold plan | $3.2m118.2k shares |
| 2026-05-11 | Kroeger Christopher A. Chief Executive Officer, director | Sold plan | $421.0k14.0k shares |
| 2026-05-11 | Hanson Kristopher General Counsel | Sold plan | $419.3k13.9k shares |
| 2026-05-08 | Kroeger Christopher A. Chief Executive Officer, director | Sold plan | $952.8k34.4k shares |
| 2026-05-07 | Kroeger Christopher A. Chief Executive Officer, director | Sold plan | $575.8k20.1k shares |
The latest 30 of 61 trades.
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| NOVO HOLDINGS A/S 7.67% of their portfolio | 3.7m $132.1m | Unchanged |
| FCPM III SERVICES B.V. 15.41% of their portfolio | 3.2m $115.6m | Unchanged |
| T. Rowe Price Investment Management, Inc. 0.07% of their portfolio | 2.8m $99.7m | Reduced -20.2k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 1.9m $69.8m | Reduced -46.6k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 1.4m $51.0m | Added +1.3m |
| BlackRock, Inc. 0.00% of their portfolio | 1.0m $36.7m | Reduced -314.6k |
| Nan Fung Group Holdings Ltd 26.47% of their portfolio | 971.3k $34.8m | Unchanged |
| 5AM Venture Management, LLC 11.83% of their portfolio | 950.0k $34.0m | Unchanged |
| Sanofi 6.12% of their portfolio | 912.0k $32.7m | Unchanged |
| STATE STREET CORP 0.00% of their portfolio | 852.1k $30.5m | Added +513.0k |
| FMR LLC 0.00% of their portfolio | 823.6k $29.5m | Added +619.1k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 784.1k $28.1m | Added +64.3k |
| Blue Owl Capital Holdings LP 3.98% of their portfolio | 729.9k $26.2m | Reduced -276.0k |
| Paradigm Biocapital Advisors LP 0.46% of their portfolio | 685.9k $24.6m | New |
| Pivotal bioVenture Partners Investment Advisor LLC 7.12% of their portfolio | 611.4k $21.9m | Reduced -1 |
| Velan Capital Investment Management LP 10.82% of their portfolio | 492.9k $17.7m | Unchanged |
| Siren, L.L.C. 0.33% of their portfolio | 450.0k $16.1m | Unchanged |
| Capital World Investors 0.00% of their portfolio | 415.7k $14.9m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 402.1k $14.4m | Reduced -79.2k |
| BAKER BROS. ADVISORS LP 0.07% of their portfolio | 364.7k $13.1m | Unchanged |
| DAFNA Capital Management LLC 1.17% of their portfolio | 171.0k $6.1m | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.01% of their portfolio | 170.9k $6.1m | Reduced -96.9k |
| Freestone Grove Partners LP 0.04% of their portfolio | 168.9k $6.1m | Reduced -145.0k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 136.8k $4.9m | Reduced -24.3k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 128.8k $4.6m | New |
| SUPERSTRING CAPITAL MANAGEMENT LP 2.84% of their portfolio | 125.4k $4.5m | Reduced -66.7k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 123.1k $4.4m | Reduced -8.1k |
| UBS Group AG 0.00% of their portfolio | 122.0k $4.4m | Reduced -114.5k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 116.7k $4.2m | Reduced -29.5k |
| STEMPOINT CAPITAL LP 0.66% of their portfolio | 106.9k $3.8m | Reduced -93.1k |
| SEVEN GRAND MANAGERS, LLC 0.14% of their portfolio | 100.0k $3.6m | Unchanged |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 96.8k $3.5m | Reduced -15.8k |
| LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio | 80.1k $2.9m | Reduced -61.9k |
| Burkehill Global Management, LP 0.10% of their portfolio | 75.0k $2.7m | Unchanged |
| Boxer Capital Management, LLC 0.20% of their portfolio | 75.0k $2.7m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 70.5k $2.5m | Added +33.2k |
| Trexquant Investment LP 0.01% of their portfolio | 63.8k $2.3m | New |
| TD Asset Management Inc 0.00% of their portfolio | 54.5k $2.0m | Added +6.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 54.5k $2.0m | Added +35.6k |
| HRT FINANCIAL LP 0.00% of their portfolio | 52.0k $1.9m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 51.9k $1.9m | Added +5.7k |
| Jain Global LLC 0.02% of their portfolio | 45.6k $1.6m | New |
| MORGAN STANLEY 0.00% of their portfolio | 38.3k $1.4m | Added +7.8k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 35.0k $1.3m | New |
| Weiss Asset Management LP 0.01% of their portfolio | 33.1k $1.2m | Not comparable |
| Bank of New York Mellon Corp 0.00% of their portfolio | 30.4k $1.1m | Reduced -9.1k |
| ADAR1 Capital Management, LLC 0.04% of their portfolio | 26.5k $949.7k | Reduced -348.4k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 25.8k $922.9k | New |
| Jump Financial, LLC 0.01% of their portfolio | 25.2k $904.0k | New |
| XTX Topco Ltd 0.01% of their portfolio | 24.9k $893.1k | Added +14.7k |
| Ghisallo Capital Management LLC 0.01% of their portfolio | 20.0k $716.8k | Unchanged |
| Nuveen, LLC 0.00% of their portfolio | 17.9k $642.3k | Reduced -5.2k |
| CITIGROUP INC 0.00% of their portfolio | 17.1k $611.1k | Added +16.1k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 15.7k $564.4k | Reduced -4.6k |
| MARKET STREET WEALTH MANAGEMENT ADVISORS LLC 0.07% of their portfolio | 14.1k $506.2k | Unchanged |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 13.9k $496.5k | New |
| BARCLAYS PLC 0.00% of their portfolio | 13.0k $465.0k | Added +7.2k |
| Virtus Investment Advisers, LLC 0.10% of their portfolio | 11.8k $422.6k | New |
| Quantinno Capital Management LP 0.00% of their portfolio | 11.3k $406.4k | New |
| MA Private Wealth 0.06% of their portfolio | 10.4k $372.3k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 10.3k $370.1k | Reduced -3.4k |
| LMR Partners LLP 0.00% of their portfolio | 10.0k $358.4k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 9.4k $337.6k | Added +2.3k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 9.0k $322.5k | Reduced -5.1k |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 8.4k $302.1k | Unchanged |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 7.5k $267.7k | New |
| MetLife Investment Management, LLC 0.00% of their portfolio | 7.4k $263.5k | Reduced -2.4k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 7.3k $260.4k | Added +5.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 7.0k $252.3k | New |
| PROFUND ADVISORS LLC 0.01% of their portfolio | 7.0k $249.3k | New |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 6.9k $248.6k | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 6.5k $231.3k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 6.4k $227.3k | Reduced -2.6k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 5.8k $207.9k | New |
| Invesco Ltd. 0.00% of their portfolio | 5.7k $205.3k | Reduced -6.5k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 5.5k $196.8k | Added +1.5k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 5.3k $190.0k | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 4.3k $148.6k | Reduced -3.5k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 2.0k $71.5k | Added +68 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 1.9k $68.0k | New |
| Aster Capital Management (DIFC) Ltd 0.01% of their portfolio | 1.5k $53.0k | New |
| Pinnacle Wealth Planning Services, Inc. 0.00% of their portfolio | 1.3k $45.3k | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 1.2k $41.6k | Added +603 |
| Penserra Capital Management LLC 0.00% of their portfolio | 1.1k $38.0k | New |
| Legal & General Group Plc 0.00% of their portfolio | 1.0k $37.0k | Reduced -772 |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 946 $33.9k | Reduced -425 |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 550 $19.7k | New |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 538 $19.3k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 474 $17.0k | New |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 400 $14.3k | New |
| State of Wyoming 0.00% of their portfolio | 361 $12.9k | New |
| Pacer Advisors, Inc. 0.00% of their portfolio | 231 $8.0k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 144 $5.2k | Reduced -918 |
| GAMMA Investing LLC 0.00% of their portfolio | 123 $4.4k | Added +29 |
| Farther Finance Advisors, LLC 0.00% of their portfolio | 120 $4.3k | Unchanged |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 94 $3.4k | New |
| Global Retirement Partners, LLC 0.00% of their portfolio | 63 $2.3k | First filing |
| Sterling Capital Management LLC 0.00% of their portfolio | 56 $2.0k | Reduced -314 |
| Versant Capital Management, Inc 0.00% of their portfolio | 50 $1.8k | Unchanged |
| Arax Advisory Partners 0.00% of their portfolio | 33 $1.2k | Added +28 |