Genmab A (GMAB)

Genmab A on one page: short interest, daily short volume, fails to deliver, large holders and 13F holders. Listed on Nasdaq.

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6.6M

Short interest

settlement 2026-10-15

1.3

Days to cover

-0.7 days vs prior

61.0%

Short share of volume

2026-10-28

3,542

Fails to deliver

settlement 2026-09-28

As of 2026-10-28.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 15 October 2026, short interest in GMAB is 6,598,711 shares, up 1,678,181 shares over the last month. Over the last 48 readings it ranged from 1,378,656 shares (31 December 2024) to 11,896,539 shares (28 November 2025). At the reported average volume of 4.9M shares a day that is 1.3 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	6,598,711	+8.8%	4,930,979	1.34
2026-09-30	6,062,007	+23.2%	2,894,650	2.09
2026-09-15	4,920,530	-28.0%	1,554,592	3.17
2026-08-31	6,830,174	-10.1%	2,804,775	2.44
2026-08-14	7,598,057	+2.8%	2,786,953	2.73
2026-07-31	7,387,972	-2.3%	1,600,289	4.62
2026-07-15	7,558,770	-9.3%	2,388,669	3.16
2026-06-30	8,329,932	-3.0%	1,775,467	4.69
2026-06-15	8,588,992	-14.5%	1,473,241	5.83
2026-05-29	10,048,894	-1.1%	2,202,451	4.56
2026-05-15	10,160,510	+19.6%	2,087,104	4.87
2026-04-30	8,496,589	+7.2%	1,644,218	5.17
2026-04-15	7,925,760	-7.6%	1,466,873	5.40
2026-03-31	8,576,449	-3.6%	1,556,141	5.51
2026-03-13	8,899,874	+2.3%	1,621,835	5.49
2026-02-27	8,699,348	+10.1%	1,882,120	4.62
2026-02-13	7,901,228	-6.1%	1,269,020	6.23
2026-01-30	8,413,829	-15.1%	2,151,118	3.91
2026-01-15	9,908,231	-11.0%	1,773,174	5.59
2025-12-31	11,130,671	-3.2%	1,405,471	7.92
2025-12-15	11,499,724	-3.3%	1,440,257	7.98
2025-11-28	11,896,539	+5.3%	1,393,989	8.53
2025-11-14	11,292,884	+7.2%	2,087,221	5.41
2025-10-31	10,539,384	+57.9%	2,558,518	4.12
2025-10-15	6,675,886	+20.0%	2,699,145	2.47
2025-09-30	5,563,792	+59.2%	2,025,957	2.75
2025-09-15	3,494,733	-9.2%	1,622,275	2.15
2025-08-29	3,847,507	+12.7%	1,281,235	3.00
2025-08-15	3,413,784	-4.9%	1,316,025	2.59
2025-07-31	3,588,106	-2.1%	929,545	3.86
2025-07-15	3,663,746	+109.8%	1,210,020	3.03
2025-06-30	1,745,895	-21.9%	1,984,859	1.00
2025-06-13	2,234,338	-7.9%	1,135,370	1.97
2025-05-30	2,425,144	-11.8%	1,183,763	2.05
2025-05-15	2,748,155	+15.1%	1,758,061	1.56
2025-04-30	2,387,259	+18.4%	1,095,359	2.18
2025-04-15	2,016,578	-6.3%	1,945,920	1.04
2025-03-31	2,151,761	-29.8%	1,255,596	1.71
2025-03-14	3,064,293	+32.8%	1,768,812	1.73
2025-02-28	2,307,497	+40.1%	1,176,980	1.96
2025-02-14	1,646,872	+1.7%	1,534,831	1.07
2025-01-31	1,619,213	-6.2%	2,059,521	1.00
2025-01-15	1,726,279	+25.2%	988,115	1.75
2024-12-31	1,378,656	-26.0%	1,122,998	1.23
2024-12-13	1,863,403	-7.9%	972,279	1.92
2024-11-29	2,024,171	-11.1%	1,256,163	1.61
2024-11-15	2,276,382	-2.6%	1,648,168	1.38
2024-10-31	2,337,908	+23.3%	1,356,812	1.72

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 28 October 2026, the short share of GMAB volume is 61.0%, up 16.8 points over the last five sessions. Over the last 30 readings it ranged from 43.4% (2 October 2026) to 79.7% (12 October 2026). The latest reading is 2.5 points below the 30-session average of 63.5%, on 12.3M shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-28	7.5M	12.3M	61.0%	32,488
2026-10-27	1.2M	2.0M	58.3%	7,012
2026-10-26	1.7M	2.7M	64.5%	3,252
2026-10-23	3.4M	5.8M	59.5%	18,221
2026-10-22	1.3M	1.9M	66.2%	3,049
2026-10-21	644K	1.5M	44.2%	9,138
2026-10-20	696K	975K	71.4%	16,188
2026-10-19	895K	1.9M	47.2%	1,060
2026-10-16	406K	932K	43.6%	4,415
2026-10-15	988K	1.5M	64.4%	12,947
2026-10-14	536K	805K	66.6%	7,286
2026-10-13	1.1M	1.6M	67.8%	1,769
2026-10-12	779K	978K	79.7%	5,992
2026-10-09	549K	822K	66.8%	1,208
2026-10-08	966K	1.7M	56.8%	306
2026-10-07	973K	1.4M	68.1%	3,398
2026-10-06	1.6M	2.3M	70.0%	10,866
2026-10-05	2.9M	4.2M	70.6%	37,089
2026-10-02	980K	2.3M	43.4%	1,908
2026-10-01	1.4M	2.5M	56.4%	39,764
2026-09-30	1.8M	2.5M	72.7%	37,916
2026-09-29	1.3M	1.8M	72.1%	35,207
2026-09-28	648K	918K	70.7%	41,628
2026-09-25	1.2M	1.6M	76.0%	32,756
2026-09-24	648K	993K	65.3%	11,027
2026-09-23	690K	1.1M	61.2%	33,039
2026-09-22	542K	702K	77.2%	20,856
2026-09-21	386K	619K	62.4%	13,502
2026-09-18	518K	834K	62.1%	16,836
2026-09-17	659K	1.1M	58.2%	12,689

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 28 September 2026, the fails-to-deliver balance in GMAB is 3,542 shares, up 181 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (9 July 2026) to 32,527 shares (20 August 2026).

Settlement	Shares failed	Price	Value
2026-09-28	3,542	$35.32	$125K
2026-09-25	3,361	$34.83	$117K
2026-09-24	25,237	$34.75	$877K
2026-09-23	9,877	$35.22	$348K
2026-09-22	25,319	$34.69	$878K
2026-09-21	249	$34.74	$9K
2026-09-18	1,479	$34.54	$51K
2026-09-17	677	$34.40	$23K
2026-09-16	1,431	$34.15	$49K
2026-09-09	4,958	$33.53	$166K
2026-09-02	6,233	$33.29	$207K
2026-08-28	197	$34.10	$7K
2026-08-26	857	$34.36	$29K
2026-08-20	32,527	$34.11	$1.1M
2026-08-18	388	$32.84	$13K
2026-08-17	15,740	$31.94	$503K
2026-08-14	378	$31.34	$12K
2026-08-13	391	$31.42	$12K
2026-08-12	428	$30.85	$13K
2026-08-11	404	$30.87	$12K
2026-08-10	72	$31.25	$2K
2026-08-06	38	$29.26	$1K
2026-08-03	54	$28.87	$2K
2026-07-29	70	$29.00	$2K
2026-07-27	30	$28.87	$866
2026-07-23	84	$28.85	$2K
2026-07-22	73	$28.37	$2K
2026-07-09	1	$29.54	$30
2026-07-07	48	$28.01	$1K
2026-06-30	85	$26.02	$2K

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

4 holders report 5% or more of GMAB in their latest filing, all on Schedule 13G (passive). The largest reported stake is Dr. Abhishek Trehan at 5.9% of the class (3,668,310 shares), filed 2026-10-05 for an event on 2026-09-28.

Filed	Form	Holder	Shares	Of class	Event
2026-10-05	13G	Dr. Abhishek Trehanindividual	3.7M	5.9%	2026-09-28
2026-10-05	13G	Darwin Global Management, Ltd.investment adviser, other entity	3.7M	5.9%	2026-09-28
2026-10-05	13G	Darwin Global Master Fund, Ltd.other entity	3.6M	5.7%	2026-09-28
2026-08-14	13G/Ano. 3	ORBIS INVESTMENT MANAGEMENT LTDnon-US institution	3.3M	5.3%	2026-06-30
2026-08-14	13G/Ano. 3	Allan Gray Australia Pty Ltdnon-US institution	8K	0.0%	2026-06-30

13F holders

Tracked managers holding GMAB at their latest 13F. JSON

6 of the 30 tracked managers held GMAB at their latest 13F, $292.6M in total at quarter-end prices. Renaissance Technologies is the largest at $96.6M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 1 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Renaissance Technologies	2026-06-30	3.5M	$96.6M	0.13%	-897K
Two Sigma Investments	2026-06-30	3.5M	$96.3M	0.07%	+1.2M
Citadel Advisors	2026-06-30	2.5M	$68.0M	0.01%	new
Millennium Management	2026-06-30	911K	$25.0M	0.01%	+118K
Point72 Asset Management	2026-06-30	136K	$3.7M	0.00%	new
AQR Capital Management	2026-06-30	106K	$2.9M	0.00%	+23K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

Genmab A in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Genmab A (GMAB), SEC CIK 1434265, listed on Nasdaq. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-28.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-05.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Company record: EDGAR filing index for CIK 1434265Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of GMAB is sold short?

6,598,711 shares were held short at the 2026-10-15 settlement, 1.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is GMAB's daily short volume?

On 2026-10-28, 7,508,476 of the 12,304,866 GMAB shares reported to FINRA were sold short, 61.0% of the day's reported volume. Short volume is a flow for one day, not a position.

Does GMAB have fails to deliver?

The SEC's latest file shows 3,542 GMAB shares failed to deliver at settlement 2026-09-28. Fails are reported per settlement date and published twice a month with a lag.

Are GMAB insiders buying or selling?

No Form 4 filings for GMAB are on record.

Who owns 5% or more of GMAB?

Which tracked 13F managers own GMAB?

6 of the 30 tracked 13F managers held GMAB shares at their latest filing, $292.6M in all. The largest: Renaissance Technologies (3.5M shares, $96.6M), Two Sigma Investments (3.5M shares, $96.3M), Ken Griffin's Citadel Advisors (2.5M shares, $68.0M), Izzy Englander's Millennium Management (911K shares, $25.0M), Steve Cohen's Point72 Asset Management (136K shares, $3.7M), Cliff Asness's AQR Capital Management (106K shares, $2.9M).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.

Genmab A (GMAB)

Short interest

Daily short volume

Fails to deliver

Large holders (13D and 13G)

13F holders

Genmab A in the regulatory record

Source and updates

How to read it

Other company pages

Datasets

Frequently Asked Questions