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BIIB
Biogen Inc. Common Stock
stockNASDAQ

At CloseOct 30, 2026 4:06:30 PM EDT
253.60USD+1.582%(+3.95)1,303,306
Pre-marketOct 30, 2026 10:29:58 AM EDT
253.78USD+1.654%(+4.13)

BIIB Fails-to-Deliver (FTD) · Latest

On 2026-10-14 there were 2,091 FTDs. The average number of FTDs per day for October 2026 is 697.

BIIB Fails-to-Deliver (FTDs)

BIIB Fails-to-Deliver

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Trade
Date (T)1		Fails-to-
Deliver2		FTD
Change		Trade
Vol.		Settlement
Date (T+B)4		Closing
Deadline
(T+35C)5		Price3$
Notional
2026-10-132,091+2,0911.0M2026-10-142026-11-17228.90478,630
2026-10-12—01.5M2026-10-132026-11-16229.410
2026-10-09—-318815.0K2026-10-122026-11-13225.710
2026-10-08318+3181.3M2026-10-092026-11-12218.4369,461
2026-10-07—01.3M2026-10-082026-11-11222.150
2026-10-06—-3,1171.0M2026-10-072026-11-10222.890
2026-10-053,117+1,677951.3K2026-10-062026-11-09223.59696,930
2026-10-021,440+1,440780.4K2026-10-052026-11-06219.88316,627
2026-10-01—01.8M2026-10-022026-11-05222.820
2026-09-30—01.6M2026-10-012026-11-04225.880
2026-09-29—01.2M2026-09-302026-11-03227.070
2026-09-28—-49,1631.3M2026-09-292026-11-02228.690
2026-09-2549,163+49,163958.0K2026-09-282026-10-30227.6011,189,499
2026-09-24—-581.0M2026-09-252026-10-29226.360
2026-09-2358-2421.5M2026-09-242026-10-28227.5313,197
2026-09-22300+1131.1M2026-09-232026-10-27225.3667,608
2026-09-21187+126928.6K2026-09-222026-10-26219.0740,966
2026-09-1861-2,2162.6M2026-09-212026-10-23215.5013,146
2026-09-172,277+1,643836.7K2026-09-182026-10-22219.05498,777
2026-09-16634+634606.5K2026-09-172026-10-21216.01136,950
2026-09-15—0756.0K2026-09-162026-10-20216.170
2026-09-14—-416629.9K2026-09-152026-10-19217.360
2026-09-11416+301.1M2026-09-142026-10-16217.1590,334
2026-09-10386+386936.6K2026-09-112026-10-15215.4383,156
2026-09-09—0694.7K2026-09-102026-10-14210.730
Historical data is split-adjusted.
1 Trade Date is calculated from the Settlement Date.
2 Fails to deliver on a given day are a CUMULATIVE number of all fails outstanding until that day, plus new fails that occur that day, less fails that settle that day. A dash (—) indicates no FTDs were reported that day. It’s been shown that the SEC withholds the FTD report for two weeks, and there are often high-volume days with no reported FTDs, so it’s unclear if missing days truly indicate 0 FTDs.
3 Closing price on the Trade Date. The FTD file contains the closing price on the day previous to settlement.
4 As of May 28, 2024, the standard for settlement is next business day after a trade (T+1B). Before that, it was trade date plus two business days (T+2B).
5 RegSHO IV. 3. A broker-dealer has up to 35 calendar days following the trade date to close out the failure to deliver position by purchasing securities of like kind and quantity. Analysis of the T+35 cycle.
FTD Release HistoryWe track the SEC's FTD publication schedule and flag when releases are late.Check it out