Celldex Therapeutics, Inc.
US ˙ NasdaqCM ˙ US15117B2025

SecurityCLDX / Celldex Therapeutics, Inc.
InstitutionWalleye Capital LLC
Latest Disclosed Ownership8,147 shares
Latest Disclosed Value $ 258,423
Walleye Capital LLC ownership in CLDX / Celldex Therapeutics, Inc.

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 8,147 shares of Celldex Therapeutics, Inc. (US:CLDX) valued at $258,423 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 13, 2025 disclosing 0 shares of Celldex Therapeutics, Inc.. The current value of the position is $233,167 USD.

Walleye Capital LLC has a history of taking positions in derivatives of the underlying security (CLDX) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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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.

CLDX / Celldex Therapeutics, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F/A-1 CELLDEX THERAPEUTICS INC COM NEW 15117B202 8,147 8,147 258 0.0011
2026-05-08 2026-03-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 8,147 8,147 258 0.0011
2025-08-13 2025-06-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 0 -93,327 -100.00 0 -100.00
2025-05-14 2025-03-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 93,327 93,327 1,694 0.0076
2024-11-14 2024-09-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 0 -50,183 -100.00 0 -100.00
2024-08-14 2024-06-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 50,183 49,147 4,743.92 1,857 4,218.60 0.0033
2024-05-15 2024-03-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 1,036 -168,232 -99.39 43 -99.36 0.0001
2024-02-14 2023-12-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 169,268 10,275 6.46 6,713 53.44 0.0142
2023-11-21 2023-09-30 13F/A-1 CELLDEX THERAPEUTICS INC COM NEW 15117B202 158,993 37,741 31.13 4,375 6.34 0.0112
2023-11-14 2023-09-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 158,993 37,741 4,375 0.0113
2023-08-14 2023-06-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 121,252 51,436 73.67 4,114 63.84 0.0149
2023-05-15 2023-03-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 69,816 -15,456 -18.13 2,512 -33.92 0.0376
2023-02-14 2022-12-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 85,272 -86,630 -50.39 3,801 -21.36 0.0693
2022-11-14 2022-09-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 171,902 171,902 4,832 0.0922
2022-08-19 2022-06-30 13F/A-1 CELLDEX THERAPEUTICS INC COM NEW 15117B202 0 -37,381 -100.00 0 -100.00
2022-08-08 2022-06-30 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 0 -37,381 0
2022-05-27 2022-03-31 13F/A-01 CELLDEX THERAPEUTICS INC COM NEW 15117B202 37,381 23,154 162.75 1,273 131.45 0.0340
2022-05-16 2022-03-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 37,381 23,154 1,273 0.0259
2022-05-27 2021-12-31 13F/A-01 CELLDEX THERAPEUTICS INC COM NEW 15117B202 14,227 14,227 550 0.0171
2022-03-03 2021-12-31 13F CELLDEX THERAPEUTICS INC COM NEW 15117B202 14,227 14,227 550 0.0137
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-13 2025-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 5,900 153 n/a n/a n/a
2025-08-13 2025-06-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-14 2025-03-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 1,700 31 n/a n/a n/a
2024-11-14 2024-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 4,400 41.94 163 24.62 n/a n/a n/a
2024-05-15 2024-03-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 3,100 -54.41 130 -51.67 n/a n/a n/a
2024-02-14 2023-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 6,800 112.50 270 205.68 n/a n/a n/a
2023-11-21 2023-09-30 13F/A CELLDEX THERAPEUTICS INC COM NEW Call 3,200 1,500.00 88 1,366.67 n/a n/a n/a
2023-11-14 2023-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 3,200 88 n/a n/a n/a
2023-08-14 2023-06-30 13F CELLDEX THERAPEUTICS INC COM NEW Call 200 7 n/a n/a n/a
2023-05-15 2023-03-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Call 300 13 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-02-13 2025-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Put 3,000 78 n/a n/a n/a
2024-11-14 2024-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F CELLDEX THERAPEUTICS INC COM NEW Put 9,100 506.67 337 441.94 n/a n/a n/a
2024-05-15 2024-03-31 13F CELLDEX THERAPEUTICS INC COM NEW Put 1,500 -88.97 63 -88.50 n/a n/a n/a
2024-02-14 2023-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Put 13,600 1,600.00 539 2,350.00 n/a n/a n/a
2023-11-21 2023-09-30 13F/A CELLDEX THERAPEUTICS INC COM NEW Put 800 -27.27 22 -40.54 n/a n/a n/a
2023-11-14 2023-09-30 13F CELLDEX THERAPEUTICS INC COM NEW Put 800 22 n/a n/a n/a
2023-08-14 2023-06-30 13F CELLDEX THERAPEUTICS INC COM NEW Put 1,100 37 n/a n/a n/a
2023-05-15 2023-03-31 13F CELLDEX THERAPEUTICS INC COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F CELLDEX THERAPEUTICS INC COM NEW Put 400 18 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.