MongoDB, Inc.
US ˙ NasdaqGM ˙ US60937P1066

SecurityMDB / MongoDB, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership163,217 shares
Latest Disclosed Value $ 68,509,270
Sei Investments Co reports 8.63% increase in ownership of MDB / MongoDB, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 163,217 shares of MongoDB, Inc. (US:MDB) valued at $68,500,543 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 150,244 shares of MongoDB, Inc.. This represents a change in shares of 8.63% during the quarter. The current value of the position is $60,116,085 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)
2026-02-13 2025-12-31 13F MONGODB CL A 60937P106 163,217 12,973 8.63 68,509 46.94 0.0676
2025-11-13 2025-09-30 13F MONGODB CL A 60937P106 150,244 34,255 29.53 46,623 91.42 0.0501
2025-08-14 2025-06-30 13F MONGODB CL A 60937P106 115,989 19,440 20.13 24,357 43.79 0.0282
2025-05-14 2025-03-31 13F/A-1 MONGODB CL A 60937P106 96,549 -11,660 -10.78 16,939 -32.76 0.0218
2025-05-13 2025-03-31 13F MONGODB CL A 60937P106 108,285 76 24,658 0.0268
2025-02-11 2024-12-31 13F MONGODB CL A 60937P106 108,209 -14,830 -12.05 25,193 -24.26 0.0324
2024-11-12 2024-09-30 13F MONGODB CL A 60937P106 123,039 9,289 8.17 33,261 16.98 0.0432
2024-08-13 2024-06-30 13F MONGODB CL A 60937P106 113,750 23,826 26.50 28,433 -11.85 0.0403
2024-05-07 2024-03-31 13F MONGODB CL A 60937P106 89,924 1,046 1.18 32,256 -11.25 0.0473
2024-02-14 2023-12-31 13F MONGODB CL A 60937P106 88,878 6,531 7.93 36,343 27.61 0.0583
2023-11-14 2023-09-30 13F MONGODB CL A 60937P106 82,347 12,856 18.50 28,481 -0.27 0.0512
2023-08-11 2023-06-30 13F MONGODB CL A 60937P106 69,491 3,179 4.79 28,557 84.73 0.0498
2023-05-12 2023-03-31 13F MONGODB CL A 60937P106 66,312 61,796 1,368.38 15,459 1,640.88 0.0287
2023-02-10 2022-12-31 13F MONGODB CL A 60937P106 4,516 -60,303 -93.03 888 -93.10 0.0020
2022-11-14 2022-09-30 13F MONGODB CL A 60937P106 64,819 -13,385 -17.12 12,873 -37.97 0.0287
2022-08-15 2022-06-30 13F MONGODB CL A 60937P106 78,204 64,111 454.91 20,754 248.63 0.0448
2022-05-13 2022-03-31 13F MONGODB CL A 60937P106 14,093 10,791 326.80 5,953 215.81 0.0120
2022-02-14 2021-12-31 13F MONGODB CL A 60937P106 3,302 1,194 56.64 1,885 112.04 0.0035
2021-11-12 2021-09-30 13F MONGODB CL A 60937P106 2,108 737 53.76 889 91.59 0.0019
2021-08-06 2021-06-30 13F MONGODB CL A 60937P106 1,371 183 15.40 464 9.18 0.0010
2021-05-12 2021-03-31 13F MONGODB CL A 60937P106 1,188 0 0.00 425 0.00 0.0011
2021-02-08 2020-12-31 13F MONGODB CL A 60937P106 1,188 48 4.21 425 67.98 0.0011
2020-12-04 2020-09-30 13F/A-1 MONGODB CL A 60937P106 1,140 204 21.79 253 21.63 0.0007
2020-11-06 2020-09-30 13F MONGODB CL A 60937P106 1,140 204 253 609.1677
2020-08-17 2020-06-30 13F/A-1 MONGODB CL A 60937P106 936 936 208 0.0006
2020-08-11 2020-06-30 13F MONGODB CL A 60937P106 936 936 208 564.2111
2019-11-12 2019-09-30 13F MONGODB CL A 60937P106 0 -2,527 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MONGODB CL A 60937P106 2,527 -443 -14.92 384 -12.13 0.0013
2019-05-15 2019-03-31 13F MONGODB CL A 60937P106 2,970 -5,549 -65.14 437 -38.71 0.0015
2019-02-13 2018-12-31 13F MONGODB CL A 60937P106 8,519 8,519 713 0.0025
2018-11-08 2018-09-30 13F MONGODB CL A 60937P106 0 -17,420 -100.00 0 -100.00
2018-08-03 2018-06-30 13F MONGODB CL A 60937P106 17,420 17,420 865 0.0029
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.