Orion Group Holdings, Inc.
US ˙ NYSE ˙ US68628V3087

SecurityORN / Orion Group Holdings, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership18,464 shares
Latest Disclosed Value $ 201,258
Citigroup Inc reports 4.67% increase in ownership of ORN / Orion Group Holdings, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 18,464 shares of Orion Group Holdings, Inc. (US:ORN) valued at $201,258 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 17,641 shares of Orion Group Holdings, Inc.. This represents a change in shares of 4.67% during the quarter. The current value of the position is $256,834 USD.

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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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 ORION GROUP HLDGS COM 68628V308 18,464 823 4.67 201 14.86 0.0000
2026-02-13 2025-12-31 13F ORION GROUP HLDGS COM 68628V308 17,641 14,253 420.69 175 525.00 0.0001
2025-11-10 2025-09-30 13F ORION GROUP HLDGS COM 68628V308 3,388 -9,404 -73.51 28 -75.86 0.0000
2025-08-11 2025-06-30 13F ORION GROUP HLDGS COM 68628V308 12,792 -12,470 -49.36 116 -12.12 0.0001
2025-05-12 2025-03-31 13F ORION GROUP HLDGS COM 68628V308 25,262 -2,884 -10.25 132 -35.92 0.0001
2025-02-12 2024-12-31 13F ORION GROUP HLDGS COM 68628V308 28,146 4,537 19.22 206 51.47 0.0001
2024-11-12 2024-09-30 13F ORION GROUP HLDGS COM 68628V308 23,609 16,761 244.76 136 109.23 0.0001
2024-08-12 2024-06-30 13F ORION GROUP HLDGS COM 68628V308 6,848 -49,015 -87.74 65 -85.81 0.0000
2024-05-10 2024-03-31 13F ORION GROUP HLDGS COM 68628V308 55,863 18,192 48.29 458 146.24 0.0003
2024-02-09 2023-12-31 13F ORION GROUP HLDGS COM 68628V308 37,671 19,380 105.95 186 89.80 0.0001
2023-12-06 2023-09-30 13F/A-1 ORION GROUP HLDGS COM 68628V308 18,291 18,291 98 0.0001
2023-11-09 2023-09-30 13F ORION GROUP HLDGS COM 68628V308 18,291 18,291 98 0.0000
2020-05-12 2020-03-31 13F ORION GROUP HOLDINGS COM 68628V308 0 -2,184 -100.00 0 -100.00
2020-02-12 2019-12-31 13F ORION GROUP HOLDINGS COM 68628V308 2,184 -989 -31.17 11 -21.43 0.0000
2019-11-08 2019-09-30 13F ORION GROUP HOLDINGS COM 68628V308 3,173 -8,537 -72.90 14 -54.84 0.0000
2019-08-12 2019-06-30 13F ORION GROUP HOLDINGS COM 68628V308 11,710 -5,591 -32.32 31 -39.22 0.0000
2019-05-13 2019-03-31 13F ORION GROUP HOLDINGS COM 68628V308 17,301 -569 -3.18 51 -32.89 0.0000
2019-02-12 2018-12-31 13F ORION GROUP HOLDINGS COM 68628V308 17,870 6 0.03 76 -43.70 0.0001
2018-11-13 2018-09-30 13F ORION GROUP HOLDINGS COM 68628V308 17,864 10,997 160.14 135 136.84 0.0001
2018-08-10 2018-06-30 13F ORION GROUP HOLDINGS COM 68628V308 6,867 -16,574 -70.71 57 -62.99 0.0001
2018-05-11 2018-03-31 13F ORION GROUP HOLDINGS COM 68628V308 23,441 -2,278 -8.86 154 -23.38 0.0001
2018-02-12 2017-12-31 13F ORION GROUP HOLDINGS COM 68628V308 25,719 -23,232 -47.46 201 -37.38 0.0002
2017-11-13 2017-09-30 13F ORION GROUP HOLDINGS COM 68628V308 48,951 218 0.45 321 -11.81 0.0003
2017-08-11 2017-06-30 13F ORION GROUP HOLDINGS COM 68628V308 48,733 10,838 28.60 364 28.62 0.0003
2017-05-12 2017-03-31 13F ORION GROUP HOLDINGS COM 68628V308 37,895 -28,028 -42.52 283 -56.86 0.0003
2017-02-10 2016-12-31 13F ORION GROUP HOLDINGS COM 68628V308 65,923 26,542 67.40 656 142.96 0.0006
2016-11-10 2016-09-30 13F ORION GROUP HOLDINGS COM 68628V308 39,381 25,309 179.85 270 264.86 0.0003
2016-08-12 2016-06-30 13F ORION GROUP HOLDINGS COM 68628V308 14,072 -13,516 -48.99 74 -48.25 0.0001
2016-05-13 2016-03-31 13F ORION MARINE GROUP COM 68628V308 27,588 16,498 148.76 143 204.26 0.0002
2016-02-12 2015-12-31 13F ORION MARINE GROUP COM 68628V308 11,090 2,285 25.95 47 -11.32 0.0000
2015-11-13 2015-09-30 13F ORION MARINE GROUP COM 68628V308 8,805 -1,080 -10.93 53 -25.35 0.0000
2015-08-13 2015-06-30 13F ORION MARINE GROUP COM 68628V308 9,885 -1,054 -9.64 71 -26.04 0.0001
2015-05-14 2015-03-31 13F ORION MARINE GROUP COM 68628V308 10,939 -12,883 -54.08 96 -63.50 0.0001
2015-02-17 2014-12-31 13F ORION MARINE GROUP COM 68628V308 23,822 15,377 182.08 263 213.10 0.0002
2014-11-14 2014-09-30 13F ORION MARINE GROUP COM 68628V308 8,445 -4,221 -33.33 84 -38.69 0.0001
2014-08-14 2014-06-30 13F ORION MARINE GROUP COM 68628V308 12,666 -2,408 -15.97 137 -27.51 0.0001
2014-05-15 2014-03-31 13F ORION MARINE GROUP COM 68628V308 15,074 -4,137 -21.53 189 -18.18 0.0002
2014-02-14 2013-12-31 13F ORION MARINE GROUP COM 68628V308 19,211 10,667 124.85 231 159.55 0.0002
2013-11-14 2013-09-30 13F ORION MARINE GROUP COM 68628V308 8,544 -6,879 -44.60 89 -52.15 0.0001
2013-08-14 2013-06-30 13F ORION MARINE GROUP COM 68628V308 15,423 15,423 186 0.0002
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.