Banco Santander (SAN)

Banco Santander on one page: short interest, daily short volume, fails to deliver, planned sales and 13F holders. Listed on NYSE, classified by the SEC as commercial banks, nec.

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48.2M

Short interest

settlement 2026-09-30

6.8

Days to cover

+1.5 days vs prior

43.5%

Short share of volume

2026-10-09

9,138

Fails to deliver

settlement 2026-09-14

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 SAN is 48,198,477 shares, down 4,217,363 shares over the last month. Over the last 48 readings it ranged from 2,465,818 shares (31 October 2025) to 107,668,073 shares (14 August 2026). At the reported average volume of 7.1M shares a day that is 6.8 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	48,198,477	+18.2%	7,094,953	6.79
2026-09-15	40,768,871	-22.2%	7,634,967	5.34
2026-08-31	52,415,840	-51.3%	24,793,327	2.11
2026-08-14	107,668,073	+21.2%	14,700,785	7.32
2026-07-31	88,817,519	+2.4%	10,257,405	8.66
2026-07-15	86,766,064	-0.2%	8,906,793	9.74
2026-06-30	86,977,172	-4.8%	8,006,515	10.86
2026-06-15	91,408,001	-4.2%	8,525,648	10.72
2026-05-29	95,360,947	+14.5%	10,757,306	8.86
2026-05-15	83,303,993	+5.8%	6,558,492	12.70
2026-04-30	78,720,035	+0.8%	7,361,404	10.69
2026-04-15	78,087,243	-4.1%	10,262,725	7.61
2026-03-31	81,435,612	+9.9%	12,983,793	6.27
2026-03-13	74,103,742	+26.7%	21,453,660	3.45
2026-02-27	58,480,112	+39.3%	15,694,027	3.73
2026-02-13	41,984,321	+1043.2%	25,539,339	1.64
2026-01-30	3,672,648	-6.0%	3,695,861	1.00
2026-01-15	3,905,974	+17.1%	3,838,945	1.02
2025-12-31	3,336,935	-4.8%	2,336,578	1.43
2025-12-15	3,505,419	+30.3%	2,875,419	1.22
2025-11-28	2,689,861	+2.4%	2,854,340	1.00
2025-11-14	2,626,764	+6.5%	3,284,405	1.00
2025-10-31	2,465,818	-42.7%	3,180,467	1.00
2025-10-15	4,303,846	-20.7%	3,490,703	1.23

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of SAN volume is 43.5%, up 2.8 points over the last five sessions. Over the last 30 readings it ranged from 26.8% (8 October 2026) to 77.7% (4 September 2026). The latest reading is 6.9 points below the 30-session average of 50.4%, on 2.9M shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	1.3M	2.9M	43.5%	739
2026-10-08	1.1M	4.2M	26.8%	0
2026-10-07	1.6M	4.6M	34.9%	1,193
2026-10-06	1.8M	3.3M	55.9%	7,768
2026-10-05	4.2M	9.0M	47.1%	2,258
2026-10-02	882K	2.2M	40.7%	99
2026-10-01	1.2M	3.0M	39.5%	12,262
2026-09-30	926K	2.1M	43.4%	120
2026-09-29	889K	1.9M	47.8%	2,362
2026-09-28	1.1M	2.3M	48.7%	1,152
2026-09-25	803K	1.8M	44.5%	887
2026-09-24	1.2M	2.2M	52.7%	200
2026-09-23	981K	2.2M	45.4%	376
2026-09-22	973K	2.9M	33.7%	371
2026-09-21	780K	1.9M	40.9%	1,495
2026-09-18	733K	2.0M	37.4%	1,651
2026-09-17	1.3M	2.2M	57.0%	905
2026-09-16	1.2M	2.1M	59.4%	411
2026-09-15	1.8M	3.2M	56.2%	814
2026-09-14	1.9M	3.0M	64.2%	1,040
2026-09-11	1.3M	2.5M	52.5%	2,371
2026-09-10	1.2M	2.0M	60.9%	319
2026-09-09	1.1M	2.2M	52.4%	300
2026-09-08	1.2M	2.5M	49.4%	704
2026-09-04	2.4M	3.1M	77.7%	195
2026-09-03	2.0M	3.2M	64.1%	8
2026-09-02	1.9M	3.0M	62.8%	549
2026-09-01	2.0M	3.2M	61.6%	2,893
2026-08-31	1.5M	2.9M	51.8%	17,834
2026-08-28	1.3M	2.2M	59.5%	173

Fails to deliver

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

As of 14 September 2026, the fails-to-deliver balance in SAN is 9,138 shares, down 278 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (2 September 2026) to 4,731,918 shares (20 August 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-14	9,138	$14.96	$137K
2026-09-10	9,416	$14.68	$138K
2026-09-09	48,129	$14.86	$715K
2026-09-08	245,473	$14.93	$3.7M
2026-09-04	85,263	$15.05	$1.3M
2026-09-03	46,155	$14.75	$681K
2026-09-02	1	$14.38	$14
2026-09-01	16,832	$14.56	$245K
2026-08-31	141,106	$14.67	$2.1M
2026-08-28	121,789	$14.55	$1.8M
2026-08-27	5	$14.70	$74
2026-08-26	3	$14.63	$44
2026-08-25	2,127	$14.72	$31K
2026-08-24	5,301	$14.59	$77K
2026-08-21	2,411,465	$14.21	$34.3M
2026-08-20	4,731,918	$14.17	$67.1M
2026-08-19	915,605	$14.24	$13.0M
2026-08-17	51,193	$14.76	$756K
2026-08-14	1,005,018	$14.78	$14.9M
2026-08-13	151,157	$14.82	$2.2M
2026-08-12	436,333	$14.71	$6.4M
2026-08-11	30,281	$14.69	$445K
2026-08-10	179,441	$14.70	$2.6M
2026-08-07	669,418	$14.65	$9.8M
2026-08-06	2,710,220	$14.64	$39.7M
2026-08-05	1,090,711	$14.47	$15.8M
2026-08-04	12,354	$14.45	$179K
2026-08-03	3,935	$14.10	$55K
2026-07-31	13,213	$14.11	$186K
2026-07-30	62,154	$13.38	$832K

Planned sales (Form 144)

Newest first. JSON

2 Form 144 notices on file for SAN worth $1.1M at the prices reported; 0 in the last 90 days worth $0. Latest: David Hazell filed on 2026-03-13 to sell 3,455 shares ($39K) from 2026-03-13.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-03-13	David HazellChief Compliance Officer	3K	$39K	0.000%	2026-03-13	Fidelity Brokerage Services LLC
2025-11-03	Mahesh Chatta AdityaChief Risk Officer	100K	$1.0M	0.001%	2025-11-03	Timothy J Hanson

13F holders

Tracked managers holding SAN at their latest 13F. JSON

4 of the 30 tracked managers held SAN at their latest 13F, $500.1M in total at quarter-end prices. Fisher Asset Management is the largest at $453.8M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 2 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Fisher Asset Management	2026-06-30	32.9M	$453.8M	0.14%	-6.6M
AQR Capital Management	2026-06-30	2.8M	$38.9M	0.01%	+1.0M
Millennium Management	2026-06-30	422K	$5.8M	0.00%	+411K
Point72 Asset Management	2026-06-30	117K	$1.6M	0.00%	-2.7M

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

Banco Santander 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 Banco Santander (SAN), SEC CIK 891478, listed on NYSE, classified by the SEC as commercial banks, nec. 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 2026-09-14.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 2026-03-13.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 891478Ticker, 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.

Other companies the SEC classifies as commercial banks, nec

Other company pages

Datasets

Frequently Asked Questions

How much of SAN is sold short?

48,198,477 shares were held short at the 2026-09-30 settlement, 6.8 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 SAN's daily short volume?

On 2026-10-09, 1,254,740 of the 2,883,510 SAN shares reported to FINRA were sold short, 43.5% of the day's reported volume. Short volume is a flow for one day, not a position.

Does SAN have fails to deliver?

The SEC's latest file shows 9,138 SAN shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.

Are SAN insiders buying or selling?

No Form 4 filings for SAN are on record.

Have SAN insiders filed to sell?

2 Form 144 notices on file for SAN worth $1.1M at the prices reported; 0 in the last 90 days worth $0. Latest: David Hazell filed on 2026-03-13 to sell 3,455 shares ($39K) from 2026-03-13.

Which tracked 13F managers own SAN?

4 of the 30 tracked 13F managers held SAN shares at their latest filing, $500.1M in all. The largest: Ken Fisher's Fisher Asset Management (32.9M shares, $453.8M), Cliff Asness's AQR Capital Management (2.8M shares, $38.9M), Izzy Englander's Millennium Management (422K shares, $5.8M), Steve Cohen's Point72 Asset Management (117K shares, $1.6M).

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