Vault-13

IMMUNOGEN INC IMGN

COM · Common Stock · CUSIP 45253H101 · ISIN US45253H1014

267 institutional holders +75 vs Q1 2023
225,557,453225.6m shares reported held*
$4.3bnreported value*
98 new 68 added 72 reduced 26 sold out net bought ≈ $263.5m (+14.1m shares)

* 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 ($3.9m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $18.85. Options: 24 managers hold calls ($69.3m notional), 17 hold puts ($35.8m).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

0100200300Q3 22: 222Q4 22: 204Q1 23: 192Q2 23: 267267Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022222
Q4 2022204
Q1 2023192
Q2 2023267

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
2000200Q4 22: 91 bought or addedQ4 22: 112 cut or sold outQ4 22Q1 23: 84 bought or addedQ1 23: 87 cut or sold outQ1 23Q2 23: 166 bought or addedQ2 23: 98 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 202291112
Q1 20238487
Q2 202316698

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20m$40m$60m$80mQ3 22 calls: $5.7mQ3 22 puts: $1.2mQ3 22P/C 0.21Q4 22 calls: $6.8mQ4 22 puts: $3.4mQ4 22P/C 0.51Q1 23 calls: $18.4mQ1 23 puts: $6.4mQ1 23P/C 0.35Q2 23 calls: $69.3mQ2 23 puts: $35.8mQ2 23P/C 0.52
Numbers
QuarterCallsPutsP/C
Q3 2022$5.7m$1.2m0.21
Q4 2022$6.8m$3.4m0.51
Q1 2023$18.4m$6.4m0.35
Q2 2023$69.3m$35.8m0.52

Biggest buyers

Redmile Group, LLC Added +9,684,200+9.7m
Point72 Asset Management, L.P. New +8,712,142+8.7m
D. E. Shaw & Co., Inc. New +6,280,516+6.3m
Fairmount Funds Management LLC New +6,029,592+6.0m
VANGUARD GROUP INC Added +5,930,704+5.9m
FMR LLC Added +3,214,194+3.2m
Hood River Capital Management LLC New +2,983,671+3.0m
Boxer Capital, LLC New +2,961,000+3.0m
BlackRock Inc. Added +2,908,657+2.9m
Woodline Partners LP New +2,547,639+2.5m

Biggest sellers

RA CAPITAL MANAGEMENT, L.P. Reduced -19,524,000-19.5m
ADAGE CAPITAL PARTNERS GP, L.L.C. Reduced -16,982,815-17.0m
STATE STREET CORP Reduced -9,138,044-9.1m
MAVERICK CAPITAL LTD Reduced -4,069,511-4.1m
MORGAN STANLEY Reduced -3,981,093-4.0m
JENNISON ASSOCIATES LLC Sold out -2,308,596-2.3m
SEGALL BRYANT & HAMILL, LLC Reduced -1,951,889-2.0m
TWO SIGMA ADVISERS, LP Reduced -1,744,500-1.7m
BANK OF AMERICA CORP /DE/ Reduced -1,454,845-1.5m
Candriam S.C.A. Reduced -1,396,714-1.4m

Biggest calls

BOOTHBAY FUND MANAGEMENT, LLC Added $12.5m661.6k shares
LMR Partners LLP New $7.5m400.0k shares
JANE STREET GROUP, LLC Added $7.5m398.8k shares
GROUP ONE TRADING LLC Reduced $6.9m365.8k shares
CITADEL ADVISORS LLC Reduced $6.7m353.0k shares
Ikarian Capital, LLC Added $6.6m350.0k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $5.8m307.1k shares
Parallax Volatility Advisers, L.P. New $3.1m163.7k shares
UBS Group AG New $2.4m128.8k shares
Caption Management, LLC New $2.1m110.0k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $6.7m356.7k shares
JANE STREET GROUP, LLC Added $6.7m353.9k shares
SIMPLEX TRADING, LLC Added $4.8m253.8k shares
CITADEL ADVISORS LLC Added $4.2m224.0k shares
GROUP ONE TRADING LLC Added $4.0m212.9k shares
Parallax Volatility Advisers, L.P. New $3.5m185.2k shares
BANK OF AMERICA CORP /DE/ New $2.0m105.3k shares
Caption Management, LLC New $1.8m93.3k shares
MILLENNIUM MANAGEMENT LLC Reduced $943.5k50.0k shares
Belvedere Trading LLC Added $460.4k24.4k 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.

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock Inc. 0.01% of their portfolio New York, NY 20,904,98620.9m $394.5m $394.5m 0.01% Added +2.9m +2,908,657
2 VANGUARD GROUP INC 0.01% of their portfolio Valley Forge, PA 20,899,02620.9m $394.4m $394.4m 0.01% Added +5.9m +5,930,704
3 Redmile Group, LLC 12.84% of their portfolio LARKSPUR, CA 17,730,41717.7m $334.6m $334.6m 12.84% Added +9.7m +9,684,200
4 JANUS HENDERSON GROUP PLC 0.18% of their portfolio LONDON, X0 15,499,78815.5m $292.4m $292.4m 0.18% Reduced -950.3k -950,293
5 WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio Boston, MA 9,752,8999.8m $184.0m $184.0m 0.03% Reduced -111.9k -111,886
6 Point72 Asset Management, L.P. 0.57% of their portfolio STAMFORD, CT 8,712,1428.7m $164.4m $164.4m 0.57% New
7 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 7,938,9147.9m $149.8m $149.8m 0.01% Reduced -9.1m -9,138,044
8 D. E. Shaw & Co., Inc. 0.18% of their portfolio New York, NY 6,280,5166.3m $118.5m $118.5m 0.18% New
9 Fairmount Funds Management LLC 16.04% of their portfolio WEST CONSHOHOCKEN, PA 6,029,5926.0m $113.8m $113.8m 16.04% New
10 FMR LLC 0.01% of their portfolio BOSTON, MA 5,612,7425.6m $105.9m $105.9m 0.01% Added +3.2m +3,214,194
11 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 4,752,5504.8m $89.7m $89.7m 0.01% Added +713.2k +713,154
12 MAVERICK CAPITAL LTD 1.52% of their portfolio DALLAS, TX 3,786,8983.8m $71.5m $71.5m 1.52% Reduced -4.1m -4,069,511
13 Artisan Partners Limited Partnership 0.11% of their portfolio Milwaukee, WI 3,725,9213.7m $70.3m $70.3m 0.11% Added +544.5k +544,542
14 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 3,338,6053.3m $63.0m $63.0m 0.01% Reduced -4.0m -3,981,093
15 DEUTSCHE BANK AG\ 0.03% of their portfolio FRANKFURT AM MAIN, 2M 3,304,7273.3m $62.4m $62.4m 0.03% Added +226.9k +226,883
16 Hood River Capital Management LLC 1.68% of their portfolio PALM BEACH GARDENS, FL 2,983,6713.0m $56.3m $56.3m 1.68% New
17 Boxer Capital, LLC 2.59% of their portfolio San Diego, CA 2,961,0003.0m $55.9m $55.9m 2.59% New
18 MILLENNIUM MANAGEMENT LLC 0.05% of their portfolio NEW YORK, NY 2,697,8632.7m $50.9m $50.9m 0.05% Reduced -279.1k -279,061
19 Nuveen Asset Management, LLC 0.02% of their portfolio CHICAGO, IL 2,642,5342.6m $49.9m $49.9m 0.02% Reduced -551.0k -550,980
20 Woodline Partners LP 0.57% of their portfolio San Francisco, CA 2,547,6392.5m $48.1m $48.1m 0.57% New
21 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 2,396,0462.4m $45.2m $45.2m 0.01% Added +252.2k +252,225
22 RA CAPITAL MANAGEMENT, L.P. 0.83% of their portfolio BOSTON, MA 2,329,9582.3m $44.0m $44.0m 0.83% Reduced -19.5m -19,524,000
23 PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio BALTIMORE, MD 2,322,2612.3m $43.8m $43.8m 0.01% Added +2.2m +2,208,333
24 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.18% of their portfolio JUPITER, FL 2,030,9552.0m $38.3m $38.3m 0.18% New
25 Avidity Partners Management LP 1.32% of their portfolio DALLAS, TX 1,997,8002.0m $37.7m $37.7m 1.32% New
26 LORD, ABBETT & CO. LLC 0.06% of their portfolio JERSEY CITY, NJ 1,837,9901.8m $34.7m $34.7m 0.06% New
27 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio SAN FRANCISCO, CA 1,810,4621.8m $34.2m $34.2m 0.01% Added +251.4k +251,441
28 FIRST MANHATTAN CO. LLC. 0.12% of their portfolio NEW YORK, NY 1,707,5001.7m $32.2m $32.2m 0.12% Added +1.7m +1,700,000
29 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 1,611,1021.6m $30.4m $30.4m 0.01% Reduced -602.7k -602,717
30 BAKER BROS. ADVISORS LP 0.17% of their portfolio NEW YORK, NY 1,520,0971.5m $28.7m $28.7m 0.17% New
31 SILVERARC CAPITAL MANAGEMENT, LLC 9.05% of their portfolio BOSTON, MA 1,420,0001.4m $26.8m $26.8m 9.05% Added +1.3m +1,270,000
32 QVT Financial LP 1.52% of their portfolio New York, NY 1,375,9001.4m $25.9m $25.9m 1.52% Unchanged
33 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.04% of their portfolio BALA CYNWYD, PA 1,315,6581.3m $24.8m $24.8m 0.04% Added +656.8k +656,842
34 TANG CAPITAL MANAGEMENT LLC 3.61% of their portfolio SAN DIEGO, CA 1,300,0001.3m $24.5m $24.5m 3.61% Added +25.1k +25,147
35 EVENTIDE ASSET MANAGEMENT, LLC 0.41% of their portfolio Boston, MA 1,300,0001.3m $24.5m $24.5m 0.41% New
36 Nicholas Investment Partners, LP 1.58% of their portfolio RANCHO SANTA FE, CA 1,224,1271.2m $23.1m $23.1m 1.58% New
37 RENAISSANCE TECHNOLOGIES LLC 0.03% of their portfolio NEW YORK, NY 1,218,0401.2m $23.0m $23.0m 0.03% Added +1.1m +1,138,900
38 PINNACLE ASSOCIATES LTD 0.40% of their portfolio NEW YORK, NY 1,209,9231.2m $22.8m $22.8m 0.40% Reduced -116.6k -116,556
39 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 1,189,2191.2m $22.4m $22.4m 0.01% Reduced -2.6k -2,578
40 TWO SIGMA ADVISERS, LP 0.06% of their portfolio NEW YORK, NY 1,186,1181.2m $22.4m $22.4m 0.06% Reduced -1.7m -1,744,500
41 Driehaus Capital Management LLC 0.28% of their portfolio Chicago, IL 1,176,1301.2m $22.2m $22.2m 0.28% New
42 PANAGORA ASSET MANAGEMENT INC 0.12% of their portfolio BOSTON, MA 1,117,9691.1m $21.1m $21.1m 0.12% Reduced -99.2k -99,173
43 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 1,092,9931.1m $20.6m $20.6m 0.00% Added +311.0k +310,960
44 Invesco Ltd. 0.01% of their portfolio ATLANTA, GA 1,035,7051.0m $19.5m $19.5m 0.01% Added +853.6k +853,637
45 Balyasny Asset Management L.P. 0.05% of their portfolio Chicago, IL 1,032,5791.0m $19.5m $19.5m 0.05% Added +929.8k +929,828
46 Candriam S.C.A. 0.14% of their portfolio STRASSEN, N4 992,582992.6k $18.7m $18.7m 0.14% Reduced -1.4m -1,396,714
47 PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio DES MOINES, IA 987,886987.9k $18.6m $18.6m 0.01% Added +931.9k +931,890
48 EMERALD ADVISERS, LLC 0.81% of their portfolio LEOLA, PA 983,697983.7k $18.6m $18.6m 0.81% New
49 CITADEL ADVISORS LLC 0.02% of their portfolio MIAMI, FL 928,240928.2k $17.5m $17.5m 0.02% Reduced -46.8k -46,818
50 Connor, Clark & Lunn Investment Management Ltd. 0.09% of their portfolio VANCOUVER, A1 909,595909.6k $17.2m $17.2m 0.09% Added +514.9k +514,941
51 JANE STREET GROUP, LLC 0.02% of their portfolio NEW YORK, NY 879,700879.7k $16.6m $16.6m 0.02% Added +863.1k +863,069
52 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 862,422862.4k $16.3m $16.3m 0.00% Reduced -106.3k -106,311
53 Parkman Healthcare Partners LLC 2.75% of their portfolio STAMFORD, CT 840,811840.8k $15.9m $15.9m 2.75% New
54 Sofinnova Investments, Inc. 1.03% of their portfolio Menlo Park, CA 827,318827.3k $15.6m $15.6m 1.03% Reduced -97.2k -97,214
55 EMERALD MUTUAL FUND ADVISERS TRUST 0.84% of their portfolio LEOLA, PA 816,994817.0k $15.4m $15.4m 0.84% New
56 TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio NEW YORK, NY 815,537815.5k $15.4m $15.4m 0.04% Reduced -838.9k -838,865
57 Artal Group S.A. 0.46% of their portfolio LUXEMBOURG, N4 765,497765.5k $14.4m $14.4m 0.46% New
58 Rhenman & Partners Asset Management AB 1.49% of their portfolio Stockholm, V7 750,000750.0k $14.2m $14.2m 1.49% Reduced -500.0k -500,000
59 PICTET ASSET MANAGEMENT SA 0.02% of their portfolio GENEVA 73, V8 721,075721.1k $13.6m $13.6m 0.02% Added +695.3k +695,266
60 Fisher Asset Management, LLC 0.01% of their portfolio PLANO, TX 702,917702.9k $13.3m $13.3m 0.01% Reduced -151.8k -151,820
61 AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio KANSAS CITY, MO 700,323700.3k $13.2m $13.2m 0.01% New
62 Man Group plc 0.04% of their portfolio LONDON, X0 682,227682.2k $12.9m $12.9m 0.04% New
63 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.03% of their portfolio Boston, MA 650,000650.0k $12.3m $12.3m 0.03% Reduced -17.0m -16,982,815
64 Ensign Peak Advisors, Inc 0.02% of their portfolio SALT LAKE CITY, UT 586,593586.6k $11.1m $11.1m 0.02% New
65 PUTNAM INVESTMENTS LLC 0.02% of their portfolio BOSTON, MA 557,007557.0k $10.5m $10.5m 0.02% Reduced -594.1k -594,146
66 Artia Global Partners LP 3.53% of their portfolio MIAMI, FL 543,358543.4k $10.3m $10.3m 3.53% New
67 Hennion & Walsh Asset Management, Inc. 0.58% of their portfolio Parsippany, NJ 515,279515.3k $9.7m $9.7m 0.58% Added +34.5k +34,542
68 CM Management, LLC 9.20% of their portfolio GULF BREEZE, FL 500,000500.0k $9.4m $9.4m 9.20% Unchanged
69 Altium Capital Management LLC 7.16% of their portfolio NEW YORK, NY 485,000485.0k $9.2m $9.2m 7.16% New
70 Swiss National Bank 0.01% of their portfolio ZURICH, V8 476,100476.1k $9.0m $9.0m 0.01% Added +47.3k +47,300
71 BRIDGER MANAGEMENT, LLC 2.92% of their portfolio NEW YORK, NY 467,220467.2k $8.8m $8.8m 2.92% New
72 Ikarian Capital, LLC 2.85% of their portfolio DALLAS, TX 447,700447.7k $8.4m $8.4m 2.85% New
73 SECTORAL ASSET MANAGEMENT INC 1.37% of their portfolio MONTREAL, A8 436,447436.4k $8.2m $8.2m 1.37% Reduced -565.0k -564,997
74 VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio ATLANTA, GA 428,190428.2k $8.1m $8.1m 0.01% Reduced -263.0k -263,011
75 Granahan Investment Management, LLC 0.25% of their portfolio WALTHAM, MA 426,752426.8k $8.1m $8.1m 0.25% Reduced -438.0k -438,014
76 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 414,178414.2k $7.8m $7.8m 0.00% Reduced -1.5m -1,454,845
77 BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio PARIS, I0 378,491378.5k $7.1m $7.1m 0.01% Reduced -159.2k -159,211
78 Schonfeld Strategic Advisors LLC 0.06% of their portfolio NEW YORK, NY 376,969377.0k $7.1m $7.1m 0.06% New
79 RHUMBLINE ADVISERS 0.01% of their portfolio BOSTON, MA 363,947363.9k $6.9m $6.9m 0.01% Added +43.4k +43,445
80 Rafferty Asset Management, LLC 0.04% of their portfolio New York, NY 337,286337.3k $6.4m $6.4m 0.04% Reduced -1.0m -1,030,684
81 HRT FINANCIAL LP 0.06% of their portfolio NEW YORK, NY 322,121322.1k $6.1m $6.1m 0.06% New
82 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 321,695321.7k $6.1m $6.1m 0.00% Added +192.8k +192,766
83 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 317,719317.7k $6.0m $6.0m 0.01% Added +32.3k +32,334
84 SIMPLEX TRADING, LLC 0.25% of their portfolio CHICAGO, IL 305,978306.0k $5.8m $5.8m 0.25% Added +187.0k +186,966
85 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 300,514300.5k $5.7m $5.7m 0.00% Added +11.8k +11,850
86 Tri Locum Partners LP 2.09% of their portfolio NEW YORK, NY 297,807297.8k $5.6m $5.6m 2.09% New
87 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 293,790293.8k $1.1m $1.1m 0.00% Unchanged
88 SEGALL BRYANT & HAMILL, LLC 0.06% of their portfolio CHICAGO, IL 291,857291.9k $5.5m $5.5m 0.06% Reduced -2.0m -1,951,889
89 Hillsdale Investment Management Inc. 0.50% of their portfolio Toronto, A6 286,700286.7k $5.4m $5.4m 0.50% New
90 NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio ALBANY, NY 284,389284.4k $5.4m $5.4m 0.01% Added +42.7k +42,678
91 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio WEST SACRAMENTO, CA 273,184273.2k $5.2m $5.2m 0.01% Added +18.8k +18,824
92 PRIMECAP MANAGEMENT CO/CA/ 0.00% of their portfolio PASADENA, CA 273,100273.1k $5.2m $5.2m 0.00% Reduced -10.0k -10,000
93 PRUDENTIAL FINANCIAL INC 0.01% of their portfolio NEWARK, NJ 270,894270.9k $5.1m $5.1m 0.01% Reduced -414.9k -414,881
94 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 266,542266.5k $5.0m $5.0m 0.00% Reduced -584.2k -584,193
95 Jump Financial, LLC 0.18% of their portfolio Chicago, IL 257,418257.4k $4.9m $4.9m 0.18% Added +235.7k +235,651
96 BLAIR WILLIAM & CO/IL 0.02% of their portfolio CHICAGO, IL 256,005256.0k $4.8m $4.8m 0.02% Reduced -323.6k -323,590
97 Sio Capital Management, LLC 1.64% of their portfolio NEW YORK, NY 245,921245.9k $4.6m $4.6m 1.64% New
98 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 224,047224.0k $4.2m $4.2m 0.00% Reduced -205.5k -205,473
99 STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio MADISON, WI 218,977219.0k $4.1m $4.1m 0.01% Added +35.7k +35,735
100 Global IMC LLC 1.21% of their portfolio SOLANA BEACH, CA 218,776218.8k $4.1m $4.1m 1.21% New