EnerSys
US ˙ NYSE ˙ US29275Y1029

SecurityENS / EnerSys
InstitutionCitigroup Inc
Latest Disclosed Ownership169,000 shares
Latest Disclosed Value $ 29,358,680
Citigroup Inc ownership in ENS / EnerSys

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 169,000 shares of EnerSys (US:ENS) valued at $29,358,680 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 145,613 shares of EnerSys. This represents a change in shares of 16.06% during the quarter. The current value of the position is $40,583,660 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (ENS) in the form of stock options. The firm currently holds call 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.

ENS / EnerSys 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)
2026-05-11 2026-03-31 13F ENERSYS COM 29275Y102 169,000 23,387 16.06 29,359 37.39 0.0125
2026-02-13 2025-12-31 13F ENERSYS COM 29275Y102 145,613 129,594 809.00 21,369 1,081.21 0.0094
2025-11-10 2025-09-30 13F ENERSYS COM 29275Y102 16,019 -8,568 -34.85 1,810 -14.18 0.0008
2025-08-11 2025-06-30 13F ENERSYS COM 29275Y102 24,587 -16,464 -40.11 2,109 -43.92 0.0010
2025-05-12 2025-03-31 13F ENERSYS COM 29275Y102 41,051 -5,895 -12.56 3,759 -13.37 0.0019
2025-02-12 2024-12-31 13F ENERSYS COM 29275Y102 46,946 -1,483 -3.06 4,339 -12.20 0.0026
2024-11-12 2024-09-30 13F ENERSYS COM 29275Y102 48,429 24,123 99.25 4,942 96.42 0.0029
2024-08-12 2024-06-30 13F ENERSYS COM 29275Y102 24,306 -71,066 -74.51 2,516 -72.07 0.0016
2024-05-10 2024-03-31 13F ENERSYS COM 29275Y102 95,372 -11,687 -10.92 9,009 -16.65 0.0059
2024-02-09 2023-12-31 13F ENERSYS COM 29275Y102 107,059 13,586 14.53 10,809 22.14 0.0076
2023-12-06 2023-09-30 13F/A-1 ENERSYS COM 29275Y102 93,473 71,916 333.61 8,849 278.32 0.0066
2023-11-09 2023-09-30 13F ENERSYS COM 29275Y102 93,473 71,916 8,849 0.0026
2023-08-10 2023-06-30 13F ENERSYS COM 29275Y102 21,557 6,870 46.78 2,339 83.31 0.0015
2023-05-11 2023-03-31 13F ENERSYS COM 29275Y102 14,687 -1,599 -9.82 1,276 6.16 0.0009
2023-02-09 2022-12-31 13F ENERSYS COM 29275Y102 16,286 -5,997 -26.91 1,203 -7.25 0.0010
2022-11-10 2022-09-30 13F ENERSYS COM 29275Y102 22,283 4,270 23.71 1,296 22.15 0.0009
2022-08-10 2022-06-30 13F ENERSYS COM 29275Y102 18,013 -333 -1.82 1,061 -22.44 0.0008
2022-05-12 2022-03-31 13F ENERSYS COM 29275Y102 18,346 -12,250 -40.04 1,368 -43.45 0.0008
2022-02-10 2021-12-31 13F ENERSYS COM 29275Y102 30,596 8,370 37.66 2,419 46.25 0.0013
2021-11-10 2021-09-30 13F ENERSYS COM 29275Y102 22,226 -284 -1.26 1,654 -24.85 0.0010
2021-08-10 2021-06-30 13F ENERSYS COM 29275Y102 22,510 -1,195 -5.04 2,201 2.28 0.0013
2021-05-13 2021-03-31 13F ENERSYS COM 29275Y102 23,705 -5,241 -18.11 2,152 -10.48 0.0014
2021-02-11 2020-12-31 13F ENERSYS COM 29275Y102 28,946 5,681 24.42 2,404 53.91 0.0014
2020-11-12 2020-09-30 13F ENERSYS COM 29275Y102 23,265 1,002 4.50 1,562 9.00 0.0010
2020-08-12 2020-06-30 13F ENERSYS COM 29275Y102 22,263 -2,381 -9.66 1,433 17.46 0.0011
2020-05-12 2020-03-31 13F ENERSYS COM 29275Y102 24,644 -15 -0.06 1,220 -33.91 0.0011
2020-02-12 2019-12-31 13F ENERSYS COM 29275Y102 24,659 14,671 146.89 1,846 180.12 0.0013
2019-11-08 2019-09-30 13F ENERSYS COM 29275Y102 9,988 -6,693 -40.12 659 -42.29 0.0005
2019-08-12 2019-06-30 13F ENERSYS COM 29275Y102 16,681 -2,880 -14.72 1,142 -10.43 0.0009
2019-05-13 2019-03-31 13F ENERSYS COM 29275Y102 19,561 -9,525 -32.75 1,275 -43.51 0.0012
2019-02-12 2018-12-31 13F ENERSYS COM 29275Y102 29,086 13,037 81.23 2,257 61.33 0.0023
2018-11-13 2018-09-30 13F ENERSYS COM 29275Y102 16,049 -17,308 -51.89 1,399 -43.82 0.0012
2018-08-10 2018-06-30 13F ENERSYS COM 29275Y102 33,357 935 2.88 2,490 10.72 0.0023
2018-05-11 2018-03-31 13F ENERSYS COM 29275Y102 32,422 15,315 89.52 2,249 88.83 0.0019
2018-02-12 2017-12-31 13F ENERSYS COM 29275Y102 17,107 7,908 85.97 1,191 86.97 0.0010
2017-11-13 2017-09-30 13F ENERSYS COM 29275Y102 9,199 1,680 22.34 637 16.88 0.0005
2017-08-11 2017-06-30 13F ENERSYS COM 29275Y102 7,519 -7,285 -49.21 545 -53.38 0.0005
2017-05-12 2017-03-31 13F ENERSYS COM 29275Y102 14,804 -43,066 -74.42 1,169 -74.14 0.0010
2017-02-10 2016-12-31 13F ENERSYS COM 29275Y102 57,870 15,301 35.94 4,520 53.48 0.0041
2016-11-10 2016-09-30 13F ENERSYS COM 29275Y102 42,569 12,191 40.13 2,945 62.98 0.0028
2016-08-12 2016-06-30 13F ENERSYS COM 29275Y102 30,378 -20,230 -39.97 1,807 -35.90 0.0018
2016-05-13 2016-03-31 13F ENERSYS COM 29275Y102 50,608 22,841 82.26 2,819 81.52 0.0032
2016-02-12 2015-12-31 13F ENERSYS COM 29275Y102 27,767 3,421 14.05 1,553 19.10 0.0015
2015-11-13 2015-09-30 13F ENERSYS COM 29275Y102 24,346 16,071 194.21 1,304 124.05 0.0012
2015-08-13 2015-06-30 13F ENERSYS COM 29275Y102 8,275 -1,230 -12.94 582 -4.59 0.0005
2015-05-14 2015-03-31 13F ENERSYS COM 29275Y102 9,505 -11,949 -55.70 610 -53.89 0.0006
2015-02-17 2014-12-31 13F ENERSYS COM 29275Y102 21,454 16,156 304.95 1,323 325.40 0.0012
2014-11-14 2014-09-30 13F ENERSYS COM 29275Y102 5,298 89 1.71 311 -13.37 0.0003
2014-08-14 2014-06-30 13F ENERSYS COM 29275Y102 5,209 -9,299 -64.10 359 -64.31 0.0003
2014-05-15 2014-03-31 13F ENERSYS COM 29275Y102 14,508 -6,965 -32.44 1,006 -33.20 0.0010
2014-02-14 2013-12-31 13F ENERSYS COM 29275Y102 21,473 13,274 161.90 1,506 203.02 0.0014
2013-11-14 2013-09-30 13F ENERSYS COM 29275Y102 8,199 -30,180 -78.64 497 -73.59 0.0005
2013-08-14 2013-06-30 13F ENERSYS COM 29275Y102 38,379 38,379 1,882 0.0019
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
(%)
2026-05-11 2026-03-31 13F ENERSYS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-13 2025-12-31 13F ENERSYS COM Call 45,000 6,604 n/a n/a n/a
2015-11-13 2015-09-30 13F ENERSYS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-13 2015-06-30 13F ENERSYS COM Call 85,400 6,003 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.