Vault-13

IMMUNOGEN INC IMGN

COM · Common Stock · CUSIP 45253H101 · ISIN US45253H1014

330 institutional holders +52 vs Q3 2023
260,456,663260.5m shares reported held*
$7.7bnreported value*
102 new 72 added 101 reduced 70 sold out net bought ≈ $116.0m (+4.6m 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 ($1.2m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $29.65. Options: 30 managers hold calls ($225.2m notional), 29 hold puts ($137.6m).

Trends to Q4 2023

Institutional holders

Managers reporting a position, each quarter

0200400Q3 22: 222Q4 22: 204Q1 23: 192Q2 23: 267Q3 23: 278Q4 23: 330330Q3 22Q4 22Q1 23Q2 23Q3 23Q4 23
Numbers
QuarterHolders
Q3 2022222
Q4 2022204
Q1 2023192
Q2 2023267
Q3 2023278
Q4 2023330

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 23Q3 23: 165 bought or addedQ3 23: 106 cut or sold outQ3 23Q4 23: 174 bought or addedQ4 23: 171 cut or sold outQ4 23
Numbers
QuarterBought or addedCut or sold out
Q4 202291112
Q1 20238487
Q2 202316698
Q3 2023165106
Q4 2023174171

Calls vs puts

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

CallsPuts
$0$100m$200m$300mQ1 23 calls: $18.4mQ1 23 puts: $6.4mQ1 23P/C 0.35Q2 23 calls: $69.3mQ2 23 puts: $35.8mQ2 23P/C 0.52Q3 23 calls: $55.1mQ3 23 puts: $33.2mQ3 23P/C 0.60Q4 23 calls: $225.2mQ4 23 puts: $137.6mQ4 23P/C 0.61
Numbers
QuarterCallsPutsP/C
Q1 2023$18.4m$6.4m0.35
Q2 2023$69.3m$35.8m0.52
Q3 2023$55.1m$33.2m0.60
Q4 2023$225.2m$137.6m0.61

Biggest buyers

RA CAPITAL MANAGEMENT, L.P. Added +10,428,313+10.4m
Pentwater Capital Management LP New +5,662,500+5.7m
FIL Ltd New +5,360,000+5.4m
NORGES BANK Added +3,484,245+3.5m
MORGAN STANLEY Added +3,389,263+3.4m
MILLENNIUM MANAGEMENT LLC Added +2,868,154+2.9m
TIG Advisors, LLC New +2,313,670+2.3m
KRYGER CAPITAL Ltd New +2,036,155+2.0m
JPMORGAN CHASE & CO Added +1,928,081+1.9m
ALPINE ASSOCIATES MANAGEMENT INC. New +1,761,300+1.8m

Biggest sellers

WELLINGTON MANAGEMENT GROUP LLP Reduced -11,304,584-11.3m
JANUS HENDERSON GROUP PLC Reduced -6,640,830-6.6m
FMR LLC Reduced -5,332,387-5.3m
Hood River Capital Management LLC Sold out -3,044,485-3.0m
PRICE T ROWE ASSOCIATES INC /MD/ Reduced -2,818,157-2.8m
Pictet Asset Management Holding SA Reduced -2,732,177-2.7m
Artisan Partners Limited Partnership Reduced -2,552,260-2.6m
D. E. Shaw & Co., Inc. Reduced -2,472,442-2.5m
Woodline Partners LP Reduced -2,033,161-2.0m
Nicholas Investment Partners, LP Reduced -1,918,889-1.9m

Biggest calls

Balyasny Asset Management L.P. New $54.2m1.8m shares
GROUP ONE TRADING LLC Added $43.7m1.5m shares
JANE STREET GROUP, LLC Added $22.0m742.1k shares
Parallax Volatility Advisers, L.P. Added $17.4m587.8k shares
Ikarian Capital, LLC Added $13.5m456.8k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $11.1m376.0k shares
Caption Management, LLC Added $10.7m360.4k shares
Slotnik Capital, LLC First filing $8.9m300.0k shares
CITADEL ADVISORS LLC Reduced $8.5m285.0k shares
UBS Group AG Added $5.6m188.7k shares

Biggest puts

Pentwater Capital Management LP New $29.6m1.0m shares
Caption Management, LLC Added $23.7m800.0k shares
Maven Securities LTD New $15.6m524.6k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $14.4m486.0k shares
JANE STREET GROUP, LLC Reduced $10.3m346.9k shares
CITADEL ADVISORS LLC Added $8.5m288.2k shares
GROUP ONE TRADING LLC Reduced $8.3m278.3k shares
PICTON MAHONEY ASSET MANAGEMENT New $7.3m247.7k shares
Centiva Capital, LP New $4.4m150.0k shares
SIMPLEX TRADING, LLC Reduced $4.2m140.7k 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, Q4 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD GROUP INC 0.02% of their portfolio Valley Forge, PA 25,466,95025.5m $755.1m $755.1m 0.02% Added +984.8k +984,795
2 RA CAPITAL MANAGEMENT, L.P. 11.00% of their portfolio BOSTON, MA 23,750,60123.8m $704.2m $704.2m 11.00% Added +10.4m +10,428,313
3 BlackRock Inc. 0.02% of their portfolio New York, NY 21,824,39221.8m $647.1m $647.1m 0.02% Added +1.6m +1,550,533
4 Redmile Group, LLC 17.42% of their portfolio LARKSPUR, CA 16,423,92216.4m $487.0m $487.0m 17.42% Reduced -1.1m -1,079,495
5 JANUS HENDERSON GROUP PLC 0.20% of their portfolio LONDON, X0 11,043,98611.0m $327.5m $327.5m 0.20% Reduced -6.6m -6,640,830
6 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 8,218,3548.2m $243.7m $243.7m 0.01% Added +3.4m +3,389,263
7 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 8,075,6718.1m $239.4m $239.4m 0.01% Reduced -1.5m -1,476,181
8 Fairmount Funds Management LLC 18.58% of their portfolio WEST CONSHOHOCKEN, PA 5,929,5925.9m $175.8m $175.8m 18.58% Unchanged
9 Pentwater Capital Management LP 3.15% of their portfolio Naples, FL 5,662,5005.7m $167.9m $167.9m 3.15% New
10 NORGES BANK 0.03% of their portfolio OSLO, Q8 5,539,3345.5m $164.2m $164.2m 0.03% Added +3.5m +3,484,245
11 GEODE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio BOSTON, MA 5,382,8755.4m $159.6m $159.6m 0.02% Added +482.9k +482,900
12 FIL Ltd 0.17% of their portfolio HAMILTON, D0 5,360,0005.4m $158.9m $158.9m 0.17% New
13 D. E. Shaw & Co., Inc. 0.19% of their portfolio New York, NY 4,522,7974.5m $134.1m $134.1m 0.19% Reduced -2.5m -2,472,442
14 MILLENNIUM MANAGEMENT LLC 0.13% of their portfolio NEW YORK, NY 4,473,8684.5m $132.7m $132.7m 0.13% Added +2.9m +2,868,154
15 JPMORGAN CHASE & CO 0.01% of their portfolio NEW YORK, NY 4,126,5084.1m $122.4m $122.4m 0.01% Added +1.9m +1,928,081
16 Davidson Kempner Capital Management LP 1.70% of their portfolio New York, NY 3,252,0013.3m $96.5m $96.5m 1.70% Not comparable
17 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.38% of their portfolio JUPITER, FL 3,221,2313.2m $95.5m $95.5m 0.38% Added +709.0k +708,980
18 Boxer Capital, LLC 4.38% of their portfolio San Diego, CA 2,961,0003.0m $87.8m $87.8m 4.38% Unchanged
19 MAVERICK CAPITAL LTD 1.52% of their portfolio DALLAS, TX 2,493,2172.5m $73.9m $73.9m 1.52% Reduced -25.3k -25,310
20 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 2,328,6712.3m $69.0m $69.0m 0.01% Reduced -42.2k -42,193
21 TIG Advisors, LLC 10.29% of their portfolio New York, NY 2,313,6702.3m $68.6m $68.6m 10.29% New
22 TANG CAPITAL MANAGEMENT LLC 6.02% of their portfolio SAN DIEGO, CA 2,199,1372.2m $65.2m $65.2m 6.02% Added +699.1k +699,137
23 Nuveen Asset Management, LLC 0.02% of their portfolio CHICAGO, IL 2,052,8942.1m $60.9m $60.9m 0.02% Reduced -1.1m -1,055,145
24 KRYGER CAPITAL Ltd 9.61% of their portfolio LONDON, X0 2,036,1552.0m $60.4m $60.4m 9.61% New
25 WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio Boston, MA 1,954,4132.0m $57.9m $57.9m 0.01% Reduced -11.3m -11,304,584
26 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 1.80% of their portfolio CHICAGO, IL 1,915,4521.9m $56.8m $56.8m 1.80% Not comparable
27 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio SAN FRANCISCO, CA 1,892,4461.9m $56.1m $56.1m 0.01% Added +61.9k +61,871
28 Avidity Partners Management LP 2.07% of their portfolio DALLAS, TX 1,829,2151.8m $54.2m $54.2m 2.07% Reduced -88.7k -88,692
29 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.19% of their portfolio TORONTO, A6 1,785,2961.8m $52.9m $52.9m 0.19% Added +1.5m +1,485,296
30 ALPINE ASSOCIATES MANAGEMENT INC. 2.68% of their portfolio PALM BEACH, FL 1,761,3001.8m $52.2m $52.2m 2.68% New
31 EMERALD ADVISERS, LLC 2.21% of their portfolio LEOLA, PA 1,744,9811.7m $51.7m $51.7m 2.21% Reduced -66.3k -66,325
32 RENAISSANCE TECHNOLOGIES LLC 0.07% of their portfolio NEW YORK, NY 1,631,2401.6m $48.4m $48.4m 0.07% Added +896.6k +896,600
33 Magnetar Financial LLC 1.23% of their portfolio EVANSTON, IL 1,629,2851.6m $48.3m $48.3m 1.23% New
34 Sofinnova Investments, Inc. 2.57% of their portfolio Menlo Park, CA 1,546,9021.5m $45.9m $45.9m 2.57% Reduced -498.3k -498,300
35 ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio NASHVILLE, TN 1,507,8091.5m $44.7m $44.7m 0.02% Added +1.2m +1,207,295
36 Balyasny Asset Management L.P. 0.12% of their portfolio Chicago, IL 1,496,7581.5m $44.4m $44.4m 0.12% Added +1.5m +1,484,838
37 AQR Arbitrage LLC 1.71% of their portfolio Greenwich, CT 1,429,0781.4m $42.4m $42.4m 1.71% New
38 Kynam Capital Management, LP 4.77% of their portfolio PRINCETON, NJ 1,422,5031.4m $42.2m $42.2m 4.77% New
39 Affinity Asset Advisors, LLC 8.30% of their portfolio NEW YORK, NY 1,404,6081.4m $41.6m $41.6m 8.30% New
40 QVT Financial LP 2.46% of their portfolio New York, NY 1,375,9001.4m $40.8m $40.8m 2.46% Unchanged
41 Westchester Capital Management, LLC 1.63% of their portfolio VALHALLA, NY 1,364,9271.4m $40.5m $40.5m 1.63% New
42 Taconic Capital Advisors LP 3.79% of their portfolio NEW YORK, NY 1,325,0001.3m $39.3m $39.3m 3.79% Not comparable
43 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 1,189,4851.2m $35.3m $35.3m 0.01% Reduced -49.6k -49,614
44 EMERALD MUTUAL FUND ADVISERS TRUST 1.87% of their portfolio LEOLA, PA 1,188,2091.2m $35.2m $35.2m 1.87% Reduced -277.9k -277,854
45 MARSHALL WACE, LLP 0.07% of their portfolio LONDON, X0 1,187,0271.2m $35.2m $35.2m 0.07% New
46 Artisan Partners Limited Partnership 0.05% of their portfolio Milwaukee, WI 1,172,3231.2m $34.8m $34.8m 0.05% Reduced -2.6m -2,552,260
47 PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio DES MOINES, IA 1,127,4021.1m $33.4m $33.4m 0.02% Added +142.7k +142,738
48 Candriam S.C.A. 0.23% of their portfolio STRASSEN, N4 1,122,5981.1m $33.3m $33.3m 0.23% Added +10 +10
49 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 1,088,2131.1m $32.3m $32.3m 0.00% Reduced -2.8m -2,818,157
50 DEUTSCHE BANK AG\ 0.02% of their portfolio FRANKFURT AM MAIN, 2M 1,065,8801.1m $31.6m $31.6m 0.02% Added +840.8k +840,814
51 Bank of New York Mellon Corp 0.01% of their portfolio NEW YORK, NY 1,063,5001.1m $31.5m $31.5m 0.01% Reduced -732.6k -732,610
52 PINNACLE ASSOCIATES LTD 0.50% of their portfolio NEW YORK, NY 1,011,7921.0m $30.0m $30.0m 0.50% Reduced -4.4k -4,364
53 Pictet Asset Management Holding SA 0.03% of their portfolio CAROUGE, V8 975,962976.0k $28.9m $28.9m 0.03% Reduced -2.7m -2,732,177
54 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.06% of their portfolio Boston, MA 971,928971.9k $28.8m $28.8m 0.06% Added +771.9k +771,928
55 WATER ISLAND CAPITAL LLC 2.72% of their portfolio NEW YORK, NY 893,758893.8k $26.5m $26.5m 2.72% New
56 Invesco Ltd. 0.01% of their portfolio ATLANTA, GA 885,323885.3k $26.2m $26.2m 0.01% Reduced -200.8k -200,845
57 Avoro Capital Advisors LLC 0.36% of their portfolio NEW YORK, NY 875,000875.0k $25.9m $25.9m 0.36% New
58 FARALLON CAPITAL MANAGEMENT, L.L.C. 0.16% of their portfolio SAN FRANCISCO, CA 842,000842.0k $25.0m $25.0m 0.16% Not comparable
59 AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio KANSAS CITY, MO 836,134836.1k $24.8m $24.8m 0.02% Added +137.0k +137,018
60 CITADEL ADVISORS LLC 0.02% of their portfolio MIAMI, FL 795,458795.5k $23.6m $23.6m 0.02% Reduced -492.1k -492,084
61 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 780,279780.3k $23.1m $23.1m 0.00% Added +238.5k +238,477
62 EVENTIDE ASSET MANAGEMENT, LLC 0.37% of their portfolio Boston, MA 763,000763.0k $22.6m $22.6m 0.37% Reduced -537.0k -537,000
63 Rock Springs Capital Management LP 0.56% of their portfolio Baltimore, MD 759,365759.4k $22.5m $22.5m 0.56% Unchanged
64 Eversept Partners, LP 2.18% of their portfolio NEW YORK, NY 748,950749.0k $22.2m $22.2m 2.18% New
65 GABELLI FUNDS LLC 0.17% of their portfolio Rye, NY 745,500745.5k $22.1m $22.1m 0.17% New
66 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.04% of their portfolio BALA CYNWYD, PA 736,034736.0k $21.8m $21.8m 0.04% Reduced -238.9k -238,853
67 New York Life Investment Management LLC 0.21% of their portfolio New York, NY 682,396682.4k $20.2m $20.2m 0.21% New
68 VOYA INVESTMENT MANAGEMENT LLC 0.02% of their portfolio ATLANTA, GA 677,450677.5k $20.1m $20.1m 0.02% Added +162.3k +162,314
69 Decheng Capital LLC 5.47% of their portfolio MENLO PARK, CA 659,928659.9k $19.6m $19.6m 5.47% First filing
70 Sio Capital Management, LLC 4.92% of their portfolio NEW YORK, NY 644,366644.4k $19.1m $19.1m 4.92% Added +411.6k +411,615
71 BARCLAYS PLC 0.01% of their portfolio LONDON, X0 642,156642.2k $19.0m $19.0m 0.01% Added +299.4k +299,429
72 JANE STREET GROUP, LLC 0.02% of their portfolio NEW YORK, NY 634,353634.4k $18.8m $18.8m 0.02% Reduced -283.4k -283,411
73 GABELLI & Co INVESTMENT ADVISERS, INC. 3.48% of their portfolio Rye, NY 624,750624.8k $18.5m $18.5m 3.48% New
74 SUPERSTRING CAPITAL MANAGEMENT LP 12.66% of their portfolio NEW YORK, NY 598,072598.1k $17.7m $17.7m 12.66% First filing
75 First Trust Capital Management L.P. 1.36% of their portfolio CHICAGO, IL 596,720596.7k $17.7m $17.7m 1.36% New
76 CANADA PENSION PLAN INVESTMENT BOARD 0.02% of their portfolio TORONTO ONTARIO, A6 586,990587.0k $17.4m $17.4m 0.02% New
77 Man Group plc 0.05% of their portfolio LONDON, X0 535,000535.0k $15.9m $15.9m 0.05% New
78 Melqart Asset Management (UK) Ltd 1.27% of their portfolio London, X0 531,324531.3k $15.8m $15.8m 1.27% New
79 TWO SIGMA ADVISERS, LP 0.04% of their portfolio NEW YORK, NY 523,118523.1k $15.5m $15.5m 0.04% Reduced -771.4k -771,400
80 HSBC HOLDINGS PLC 0.01% of their portfolio LONDON, X0 519,779519.8k $15.4m $15.4m 0.01% New
81 PICTON MAHONEY ASSET MANAGEMENT 0.69% of their portfolio Toronto, A6 500,000500.0k $14.8m $14.8m 0.69% New
82 CM Management, LLC 11.91% of their portfolio GULF BREEZE, FL 500,000500.0k $14.8m $14.8m 11.91% Unchanged
83 Swiss National Bank 0.01% of their portfolio ZURICH, V8 480,800480.8k $14.3m $14.3m 0.01% Unchanged
84 Carlson Capital, L.P. 1.11% of their portfolio DALLAS, TX 466,188466.2k $13.8m $13.8m 1.11% New
85 Slotnik Capital, LLC 9.47% of their portfolio DALLAS, TX 460,000460.0k $13.6m $13.6m 9.47% First filing
86 FMR LLC 0.00% of their portfolio BOSTON, MA 456,168456.2k $13.5m $13.5m 0.00% Reduced -5.3m -5,332,387
87 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 454,213454.2k $13.5m $13.5m 0.00% Reduced -726.5k -726,531
88 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 417,277417.3k $12.4m $12.4m 0.01% Added +124.2k +124,236
89 Segantii Capital Management Ltd 0.74% of their portfolio HONG KONG, K3 415,000415.0k $12.3m $12.3m 0.74% New
90 PANAGORA ASSET MANAGEMENT INC 0.07% of their portfolio BOSTON, MA 409,658409.7k $12.1m $12.1m 0.07% Reduced -688.8k -688,759
91 Woodline Partners LP 0.13% of their portfolio San Francisco, CA 400,000400.0k $11.9m $11.9m 0.13% Reduced -2.0m -2,033,161
92 Birchview Capital, LP 4.37% of their portfolio BURLINGTON, VT 376,000376.0k $11.1m $11.1m 4.37% Reduced -4.0k -4,000
93 TWO SIGMA INVESTMENTS, LP 0.03% of their portfolio NEW YORK, NY 363,900363.9k $10.8m $10.8m 0.03% Reduced -1.3m -1,264,317
94 RHUMBLINE ADVISERS 0.01% of their portfolio BOSTON, MA 361,594361.6k $10.7m $10.7m 0.01% Reduced -2.8k -2,802
95 Hennion & Walsh Asset Management, Inc. 0.60% of their portfolio Parsippany, NJ 356,997357.0k $10.6m $10.6m 0.60% Reduced -166.1k -166,077
96 Cubist Systematic Strategies, LLC 0.12% of their portfolio STAMFORD, CT 340,346340.3k $10.1m $10.1m 0.12% Added +313.6k +313,550
97 CITIGROUP INC 0.01% of their portfolio NEW YORK, NY 337,743337.7k $10.0m $10.0m 0.01% Added +92.2k +92,192
98 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 310,789310.8k $9.2m $9.2m 0.00% Added +4.8k +4,769
99 FIRST TRUST ADVISORS LP 0.01% of their portfolio Wheaton, IL 307,539307.5k $9.1m $9.1m 0.01% New
100 Rafferty Asset Management, LLC 0.04% of their portfolio New York, NY 307,369307.4k $9.1m $9.1m 0.04% Reduced -259.6k -259,616