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Y-mAbs Therapeutics, Inc.

YMABDelisted Sep 16, 2025
Industry
Pharmaceutical Preparations
SEC CIK
0001722964

Y-mAbs Therapeutics, Inc. was delisted on Sep 16, 2025; its insiders filed their last Form 4 on Sep 19, 2025; 97 institutions reported holding it in 13F filings for Q2 2025, worth $125.9M in total; no superinvestor held it.

13F holders, Q2 2025

Institutional positions in Y-mAbs Therapeutics, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

YMAB is no longer listed, so this page shows Q2 2025. 13F filings for later quarters list far fewer holders.

Institutional holders
97
−6 vs. Q1 2025
Shares held
27.9M
−901.5K (−3.1%) vs. Q1 2025
Total value
$125.9M
−$1.76M (−1.4%) vs. Q1 2025
New holders
13
29 more added
Sold out
19
36 more reduced

Compare with Q1 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting YMAB on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2025: 97 institutions
Q1 2021: 117 institutionsQ2 2021: 100 institutionsQ3 2021: 97 institutionsQ4 2021: 97 institutionsQ1 2022: 88 institutionsQ2 2022: 91 institutionsQ3 2022: 100 institutionsQ4 2022: 91 institutionsQ1 2023: 86 institutionsQ2 2023: 95 institutionsQ3 2023: 99 institutionsQ4 2023: 94 institutionsQ1 2024: 96 institutionsQ2 2024: 96 institutionsQ3 2024: 105 institutionsQ4 2024: 113 institutionsQ1 2025: 103 institutionsQ2 2025: 97 institutionsQ3 2025: 2 institutionsQ4 2025: 0 institutionsQ1 2026: 0 institutionsQ2 2026: 0 institutions
Value heldQ2 2025: $125.9M
Q1 2021: $804.8MQ2 2021: $886.9MQ3 2021: $749.0MQ4 2021: $417.1MQ1 2022: $300.6MQ2 2022: $374.7MQ3 2022: $339.7MQ4 2022: $94.2MQ1 2023: $95.4MQ2 2023: $132.4MQ3 2023: $107.3MQ4 2023: $138.0MQ1 2024: $374.0MQ2 2024: $294.2MQ3 2024: $338.5MQ4 2024: $225.5MQ1 2025: $127.6MQ2 2025: $125.9MQ3 2025: $78.3KQ4 2025: $0Q1 2026: $0Q2 2026: $0
Institutions holding YMAB and their total value by quarter
QuarterHoldersValue
Q2 20260$0
Q1 20260$0
Q4 20250$0
Q3 20252$78.3K
Q2 202597$125.9M
Q1 2025103$127.6M
Q4 2024113$225.5M
Q3 2024105$338.5M
Q2 202496$294.2M
Q1 202496$374.0M
Q4 202394$138.0M
Q3 202399$107.3M
Q2 202395$132.4M
Q1 202386$95.4M
Q4 202291$94.2M
Q3 2022100$339.7M
Q2 202291$374.7M
Q1 202288$300.6M
Q4 202197$417.1M
Q3 202197$749.0M
Q2 2021100$886.9M
Q1 2021117$804.8M

Institutions, Q2 2025

Shares, value and share of portfolio for each institution holding Y-mAbs Therapeutics, Inc.; share changes are against Q1 2025.

Institutions holding YMAB in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Paradigm Biocapital Advisors LP4,236,346$19.1M0.82%00.0%Unchanged
Acorn Capital Advisors, LLC3,418,995$15.4M10.09%+183,608+5.7%Added
BlackRock, Inc.2,748,077$12.4M0.00%−153,948−5.3%Reduced
Caligan Partners LP2,342,609$10.6M2.05%00.0%Unchanged
Sofinnova Investments, Inc.2,194,278$9.90M0.67%00.0%Unchanged
Vanguard Group Inc1,943,285$8.76M0.00%−3,224−0.2%Reduced
Polar Capital Holdings Plc1,789,800$8.07M0.04%−41,200−2.3%Reduced
Geode Capital Management, LLC848,461$3.83M0.00%−1,039−0.1%Reduced
State Street Corp780,145$3.52M0.00%−8,876−1.1%Reduced
Boothbay Fund Management, LLC693,693$3.13M0.10%00.0%Unchanged
D. E. Shaw & Co., Inc.516,857$2.33M0.00%−32,809−6.0%Reduced
Dimensional Fund Advisors LP412,246$1.86M0.00%−6,308−1.5%Reduced
Nantahala Capital Management, LLC351,878$1.59M0.11%+351,878New
Soleus Capital Management, L.P.349,982$1.58M0.11%00.0%Unchanged
Northern Trust Corp308,130$1.39M0.00%−19,771−6.0%Reduced
Morgan Stanley292,567$1.32M0.00%−207,594−41.5%Reduced
Stonepine Capital Management, LLC285,300$1.29M1.27%+154,140+117.5%Added
Charles Schwab Investment Management Inc278,179$1.25M0.00%+569+0.2%Added
Bank of America Corp274,164$1.24M0.00%−8,154−2.9%Reduced
AQR Capital Management LLC252,142$1.14M0.00%+87,354+53.0%Added
UBS Group AG229,072$1.03M0.00%+137,496+150.1%Added
Goldman Sachs Group Inc212,751$959.5K0.00%+10,975+5.4%Added
Citadel Advisors LLC207,642$936.5K0.00%+53,687+34.9%Added
Gsa Capital Partners LLP186,062$839.0K0.06%+165,431+801.9%Added
Renaissance Technologies LLC164,100$740.1K0.00%−92,606−36.1%Reduced
JPMorgan Chase & Co164,055$739.9K0.00%−83,387−33.7%Reduced
Infinitum Asset Management, LLC155,529$701.4K0.16%00.0%Unchanged
Jacobs Levy Equity Management, Inc142,641$643.3K0.00%−94,870−39.9%Reduced
Millennium Management LLC139,955$631.2K0.00%−326,665−70.0%Reduced
Two Sigma Investments, LP125,298$565.1K0.00%−29,487−19.1%Reduced
Federated Hermes, Inc.119,425$538.6K0.00%−34,028−22.2%Reduced
Two Sigma Advisers, LP115,700$521.8K0.00%−27,600−19.3%Reduced
Rice Hall James & Associates, LLC109,604$494.3K0.03%+5,962+5.8%Added
Bank of New York Mellon Corp99,352$448.1K0.00%+6,878+7.4%Added
BNP Paribas Arbitrage, SA94,383$425.7K0.00%−1,119−1.2%Reduced
Nuveen, LLC93,418$421.3K0.00%−19,065−16.9%Reduced
XTX Topco Ltd86,440$389.8K0.02%−5,014−5.5%Reduced
Barclays PLC72,842$328.5K0.00%+26,084+55.8%Added
Cubist Systematic Strategies, LLC69,908$315.3K0.00%−85,614−55.0%Reduced
Rhumbline Advisers68,399$308.5K0.00%+14,490+26.9%Added
STRS Ohio62,400$281.4K0.00%+19,000+43.8%Added
Jump Financial, LLC61,500$277.4K0.00%+23,421+61.5%Added
Jane Street Group, LLC60,873$274.5K0.00%+60,873New
Alliancebernstein L.P.59,380$267.8K0.00%+4,600+8.4%Added
Bridgeway Capital Management, LLC55,700$251.2K0.01%+30,800+123.7%Added
State of Wisconsin Investment Board51,336$231.5K0.00%+51,336New
Susquehanna International Group, LLP51,090$230.4K0.00%−9,570−15.8%Reduced
Sapient Capital LLC43,700$197.1K0.00%00.0%Unchanged
Invesco Ltd.42,833$193.2K0.00%+10,286+31.6%Added
Marshall Wace, LLP40,181$181.2K0.00%+40,181New
Quest Partners LLC38,925$175.6K0.02%00.0%Unchanged
FMR LLC30,868$139.2K0.00%+1,607+5.5%Added
Deutsche Bank AG28,803$129.9K0.00%00.0%Unchanged
Alps Advisors Inc24,429$110.2K0.00%−8,880−26.7%Reduced
MetLife Investment Management21,928$98.9K0.00%+4,852+28.4%Added
Intech Investment Management LLC21,674$97.8K0.00%−5,021−18.8%Reduced
Mirae Asset Global ETFs Holdings Ltd.21,185$95.5K0.00%−936−4.2%Reduced
Wells Fargo & Company19,037$85.9K0.00%+1,185+6.6%Added
Price T Rowe Associates Inc17,211$78.0K0.00%00.0%Unchanged
Citigroup Inc15,250$68.8K0.00%−13,268−46.5%Reduced
State Board of Administration of Florida Retirement System14,596$65.8K0.00%00.0%Unchanged
Manufacturers Life Insurance Company, The13,143$59.3K0.00%−796−5.7%Reduced
Squarepoint Ops LLC12,233$55.2K0.00%−116,294−90.5%Reduced
Point72 Asia (Singapore) Pte. Ltd.12,171$54.9K0.01%−18,917−60.8%Reduced
HSBC Holdings PLC11,948$54.8K0.00%+11,948New
Tower Research Capital LLC (TRC)11,494$51.8K0.00%+6,474+129.0%Added
Voya Investment Management LLC10,742$48.4K0.00%+531+5.2%Added
Los Angeles Capital Management LLC10,284$46.4K0.00%+10,284New
New York State Common Retirement Fund10,110$45.6K0.00%00.0%Unchanged
China Universal Asset Management Co., Ltd.9,097$41.0K0.00%+113+1.3%Added
Raymond James Financial Inc7,701$34.7K0.00%+7,701New
Police & Firemen's Retirement System of New Jersey7,327$33.0K0.00%00.0%Unchanged
CWM, LLC7,121$32.0K0.00%+4,771+203.0%Added
Skopos Labs, Inc.4,951$22.3K0.00%−972−16.4%Reduced
Legal & General Group Plc4,131$18.6K0.00%−4,444−51.8%Reduced
Ameritas Investment Partners, Inc.3,701$16.7K0.00%00.0%Unchanged
California State Teachers Retirement System2,665$12.0K0.00%00.0%Unchanged
Mirae Asset Global Investments Co., Ltd.1,750$7.89K0.00%+245+16.3%Added
Royal Bank of Canada1,612$7.00K0.00%−98−5.7%Reduced
EverSource Wealth Advisors, LLC1,265$5.71K0.00%+1,221+2,775.0%Added
GF Fund Management Co. Ltd.1,111$5.01K0.00%00.0%Unchanged
Amalgamated Bank1,217$5.00K0.00%00.0%Unchanged
Essential Partners LLC930$4.19K0.00%+930New
IFP Advisors, Inc334$1.51K0.00%+334Added
Point72 (DIFC) Ltd287$1.29K0.00%−4,771−94.3%Reduced
Daiwa Securities Group Inc.162$1.00K0.00%00.0%Unchanged
Allworth Financial LP201$9070.00%+201New
The PNC Financial Services Group, Inc.129$5820.00%+129New
Rialto Wealth Management, LLC122$5510.00%+122New
Nisa Investment Advisors, LLC104$4690.00%−155−59.8%Reduced
Sterling Capital Management LLC87$3920.00%+49+128.9%Added
Rothschild Investment LLC50$2260.00%−60−54.5%Reduced
True Wealth Design, LLC29$1310.00%+12+70.6%Added
SBI Securities Co., Ltd.16$720.00%00.0%Unchanged
Clearstead Advisors, LLC9$410.00%+9New
Advisor Group Holdings, Inc.4$180.00%+4New
Farther Finance Advisors, LLC1$50.00%−1,997−99.9%Reduced
Pictet Asset Management Holding SA0$00.00%−441,934−100.0%Sold out
Wellington Management Group LLP0$00.00%−204,052−100.0%Sold out
Wesbanco Bank Inc0$00.00%−55,000−100.0%Sold out