GSK (GSK)

GSK on one page: short interest, daily short volume, fails to deliver, planned sales, large holders and 13F holders. Listed on NYSE, classified by the SEC as pharmaceutical preparations.

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14.8M

Short interest

settlement 2026-09-30

4.1

Days to cover

-1.4 days vs prior

25.7%

Short share of volume

2026-10-09

999

Fails to deliver

settlement 2026-09-04

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in GSK is 14,797,116 shares, up 1,250,504 shares over the last month. Over the last 48 readings it ranged from 8,398,074 shares (15 June 2026) to 23,523,589 shares (15 November 2024). At the reported average volume of 3.6M shares a day that is 4.1 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	14,797,116	+1.0%	3,575,768	4.14
2026-09-15	14,652,083	+8.2%	2,658,073	5.51
2026-08-31	13,546,612	-8.3%	2,831,355	4.78
2026-08-14	14,778,190	+1.8%	3,317,155	4.46
2026-07-31	14,516,962	+5.5%	5,678,730	2.56
2026-07-15	13,759,806	+7.9%	3,093,122	4.45
2026-06-30	12,755,267	+51.9%	3,847,846	3.31
2026-06-15	8,398,074	-14.0%	4,276,007	1.96
2026-05-29	9,768,845	-28.0%	3,084,859	3.17
2026-05-15	13,570,360	+2.5%	3,669,331	3.70
2026-04-30	13,234,954	-14.3%	4,723,763	2.80
2026-04-15	15,452,246	-3.8%	3,899,884	3.96
2026-03-31	16,061,751	+29.7%	4,478,287	3.59
2026-03-13	12,381,329	+14.6%	5,069,650	2.44
2026-02-27	10,805,377	-17.3%	5,843,563	1.85
2026-02-13	13,069,554	-26.3%	7,954,005	1.64
2026-01-30	17,722,127	+1.0%	5,885,997	3.01
2026-01-15	17,551,492	+17.8%	4,478,931	3.92
2025-12-31	14,906,130	+32.8%	2,617,064	5.70
2025-12-15	11,227,595	+3.4%	3,630,450	3.09
2025-11-28	10,855,839	-13.5%	4,896,602	2.22
2025-11-14	12,554,953	-12.2%	4,455,480	2.82
2025-10-31	14,297,157	+7.2%	6,356,262	2.25
2025-10-15	13,334,110	+6.9%	6,818,719	1.96

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of GSK volume is 25.7%, down 1.4 points over the last five sessions. Over the last 30 readings it ranged from 17.8% (7 October 2026) to 65.0% (22 September 2026). The latest reading is 21.4 points below the 30-session average of 47.1%, on 3.3M shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	845K	3.3M	25.7%	0
2026-10-08	1.1M	3.3M	33.9%	691
2026-10-07	593K	3.3M	17.8%	2,993
2026-10-06	621K	2.9M	21.4%	4,980
2026-10-05	580K	1.3M	44.1%	2,087
2026-10-02	671K	2.5M	27.1%	1,652
2026-10-01	1.0M	2.3M	43.6%	4,733
2026-09-30	759K	2.9M	26.3%	114
2026-09-29	539K	1.0M	52.0%	208
2026-09-28	719K	1.5M	48.9%	22,303
2026-09-25	603K	964K	62.5%	0
2026-09-24	534K	951K	56.2%	988
2026-09-23	677K	1.1M	63.6%	376
2026-09-22	882K	1.4M	65.0%	518
2026-09-21	460K	946K	48.6%	1,526
2026-09-18	878K	1.4M	62.0%	740
2026-09-17	637K	1.1M	60.7%	1,182
2026-09-16	637K	1.2M	55.3%	1,247
2026-09-15	378K	874K	43.3%	3,902
2026-09-14	367K	971K	37.8%	2,030
2026-09-11	331K	762K	43.4%	8,295
2026-09-10	311K	789K	39.5%	288
2026-09-09	552K	1.0M	53.6%	1,219
2026-09-08	800K	1.3M	61.9%	382
2026-09-04	480K	801K	59.9%	397
2026-09-03	353K	845K	41.8%	566
2026-09-02	594K	913K	65.0%	848
2026-09-01	471K	861K	54.7%	80
2026-08-31	418K	878K	47.6%	190
2026-08-28	536K	1.1M	49.9%	3,706

Fails to deliver

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

As of 4 September 2026, the fails-to-deliver balance in GSK is 999 shares, down 19,991 shares over the last settlement date. Over the last 30 readings it ranged from 3 shares (27 July 2026) to 197,242 shares (22 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-04	999	$50.87	$51K
2026-09-03	20,990	$50.44	$1.1M
2026-08-28	4,454	$50.27	$224K
2026-08-27	79	$51.43	$4K
2026-08-14	39,991	$50.45	$2.0M
2026-08-13	75	$50.30	$4K
2026-08-12	90,888	$50.90	$4.6M
2026-08-07	279	$52.17	$15K
2026-08-06	38,334	$51.46	$2.0M
2026-08-05	28,269	$51.53	$1.5M
2026-08-04	12,472	$51.51	$642K
2026-07-27	3	$51.35	$154
2026-07-21	120	$50.04	$6K
2026-07-10	5,030	$52.47	$264K
2026-07-09	1,745	$52.52	$92K
2026-07-08	78,924	$53.32	$4.2M
2026-07-06	1,602	$53.66	$86K
2026-07-01	51,262	$52.42	$2.7M
2026-06-30	55,098	$52.81	$2.9M
2026-06-25	147,407	$51.09	$7.5M
2026-06-23	4,631	$50.74	$235K
2026-06-22	197,242	$50.67	$10.0M
2026-06-18	43,059	$52.15	$2.2M
2026-06-16	3,068	$52.23	$160K
2026-06-15	25,807	$53.04	$1.4M
2026-06-12	282	$52.86	$15K
2026-06-11	289	$51.17	$15K
2026-06-03	1,657	$49.00	$81K
2026-05-28	501	$51.58	$26K
2026-05-26	374	$51.38	$19K

Planned sales (Form 144)

Newest first. JSON

1 Form 144 notice on file for GSK worth $2.3M at the prices reported; 1 in the last 90 days worth $2.3M. Latest: Martinez Maria E filed on 2026-08-20 to sell 44,397 shares ($2.3M) from 2026-08-20.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-08-20	Martinez Maria EOfficer	44K	$2.3M	0.001%	2026-08-20	CHARLES SCHWAB & CO

Large holders (13D and 13G)

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

2 holders report 5% or more of GSK in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 5.8% of the class (234,936,061 shares), filed 2026-05-06 for an event on 2026-03-31.

Filed	Form	Holder	Shares	Of class	Event
2026-08-13	13G/Ano. 3	Dodge & Coxinvestment adviser	173.3M	4.3%	2026-06-30
2026-05-06	13G	FMR LLCparent holding company	234.9M	5.8%	2026-03-31
2026-05-06	13G	Abigail P. Johnsonindividual	234.9M	5.8%	2026-03-31

13F holders

Tracked managers holding GSK at their latest 13F. JSON

7 of the 30 tracked managers held GSK at their latest 13F, $2.12B in total at quarter-end prices. Fisher Asset Management is the largest at $1.87B (0.6% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 1 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Fisher Asset Management	2026-06-30	35.7M	$1.87B	0.56%	+1.2M
Point72 Asset Management	2026-06-30	2.7M	$139.1M	0.15%	new
D. E. Shaw & Co.	2026-06-30	1.0M	$53.4M	0.03%	new
Bridgewater Associates	2026-06-30	504K	$26.4M	0.11%	-194K
AQR Capital Management	2026-06-30	346K	$18.1M	0.01%	+63K
Citadel Advisors	2026-06-30	152K	$7.9M	0.00%	new
Two Sigma Investments	2026-06-30	71K	$3.7M	0.00%	new

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

GSK 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 GSK (GSK), SEC CIK 1131399, listed on NYSE, classified by the SEC as pharmaceutical preparations. 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 2026-09-30.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-04.JSON and CSV
Planned sales: SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-20.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 2026-08-13.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 1131399Ticker, 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 GSK is sold short?

14,797,116 shares were held short at the 2026-09-30 settlement, 4.1 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 GSK's daily short volume?

On 2026-10-09, 845,193 of the 3,289,492 GSK shares reported to FINRA were sold short, 25.7% of the day's reported volume. Short volume is a flow for one day, not a position.

Does GSK have fails to deliver?

The SEC's latest file shows 999 GSK shares failed to deliver at settlement 2026-09-04. Fails are reported per settlement date and published twice a month with a lag.

Are GSK insiders buying or selling?

No Form 4 filings for GSK are on record.

Have GSK insiders filed to sell?

1 Form 144 notice on file for GSK worth $2.3M at the prices reported; 1 in the last 90 days worth $2.3M. Latest: Martinez Maria E filed on 2026-08-20 to sell 44,397 shares ($2.3M) from 2026-08-20.

Who owns 5% or more of GSK?

Which tracked 13F managers own GSK?

7 of the 30 tracked 13F managers held GSK shares at their latest filing, $2.12B in all. The largest: Ken Fisher's Fisher Asset Management (35.7M shares, $1.87B), Steve Cohen's Point72 Asset Management (2.7M shares, $139.1M), D. E. Shaw & Co. (1.0M shares, $53.4M), Ray Dalio's Bridgewater Associates (504K shares, $26.4M), Cliff Asness's AQR Capital Management (346K shares, $18.1M), Ken Griffin's Citadel Advisors (152K shares, $7.9M). The table above lists all 7.

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

GSK (GSK)

Short interest

Daily short volume

Fails to deliver

Planned sales (Form 144)

Large holders (13D and 13G)

13F holders

GSK in the regulatory record

Source and updates

How to read it

Other companies the SEC classifies as pharmaceutical preparations

Datasets

Frequently Asked Questions