Maplebear Inc.
US ˙ NasdaqGS ˙ US5653941030

SecurityCART / Maplebear Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership282,281 shares
Latest Disclosed Value $ 10,574,246
Citadel Advisors Llc ownership in CART / Maplebear Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 282,281 shares of Maplebear Inc. (US:CART) valued at $10,574,246 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,324,430 shares of Maplebear Inc.. This represents a change in shares of -87.86% during the quarter. The current value of the position is $11,646,914 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (CART) in the form of stock options. The firm currently holds call options representing 498,700 of underlying shares valued at $18,681,302 USD and put options representing 62,100 of underlying shares valued at $2,326,266 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.

CART / Maplebear Inc. 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)
2026-05-15 2026-03-31 13F MAPLEBEAR COM 565394103 282,281 -2,042,149 -87.86 10,574 -89.89 0.0015
2026-02-17 2025-12-31 13F MAPLEBEAR COM 565394103 2,324,430 -361,160 -13.45 104,553 5.91 0.0157
2025-11-14 2025-09-30 13F MAPLEBEAR COM 565394103 2,685,590 2,657,953 9,617.37 98,722 7,797.76 0.0150
2025-08-14 2025-06-30 13F MAPLEBEAR COM 565394103 27,637 -1,123,253 -97.60 1,250 -97.28 0.0002
2025-05-15 2025-03-31 13F MAPLEBEAR COM 565394103 1,150,890 1,053,718 1,084.38 45,909 1,040.88 0.0087
2025-02-14 2024-12-31 13F MAPLEBEAR COM 565394103 97,172 35,316 57.09 4,025 59.68 0.0007
2024-11-14 2024-09-30 13F MAPLEBEAR COM 565394103 61,856 -4,238,071 -98.56 2,520 -98.18 0.0005
2024-08-14 2024-06-30 13F MAPLEBEAR COM 565394103 4,299,927 333,260 8.40 138,200 -6.57 0.0280
2024-05-15 2024-03-31 13F MAPLEBEAR COM 565394103 3,966,667 3,152,775 387.37 147,917 674.35 0.0285
2024-02-14 2023-12-31 13F MAPLEBEAR COM 565394103 813,892 322,960 65.79 19,102 31.06 0.0038
2023-11-14 2023-09-30 13F MAPLEBEAR COM 565394103 490,932 479,514 4,199.63 14,576 16,094.44 0.0031
2019-08-14 2019-06-30 13F CAROLINA TR BANCSHARES Cmn 14422P105 11,418 11,418 90 0.0000
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
(%)
2026-05-15 2026-03-31 13F MAPLEBEAR COM Call 498,700 -35.41 18,681 -46.21 n/a n/a n/a
2026-02-17 2025-12-31 13F MAPLEBEAR COM Call 772,100 41.62 34,729 73.29 n/a n/a n/a
2025-11-14 2025-09-30 13F MAPLEBEAR COM Call 545,200 147.71 20,042 101.28 n/a n/a n/a
2025-08-14 2025-06-30 13F MAPLEBEAR COM Call 220,100 -5.37 9,957 7.32 n/a n/a n/a
2025-05-15 2025-03-31 13F MAPLEBEAR COM Call 232,600 -49.43 9,278 -51.30 n/a n/a n/a
2025-02-14 2024-12-31 13F MAPLEBEAR COM Call 460,000 7.75 19,053 9.56 n/a n/a n/a
2024-11-14 2024-09-30 13F MAPLEBEAR COM Call 426,900 -61.26 17,392 -50.89 n/a n/a n/a
2024-08-14 2024-06-30 13F MAPLEBEAR COM Call 1,101,900 36.81 35,415 17.92 n/a n/a n/a
2024-05-15 2024-03-31 13F MAPLEBEAR COM Call 805,400 445.29 30,033 766.50 n/a n/a n/a
2024-02-14 2023-12-31 13F MAPLEBEAR COM Call 147,700 -30.43 3,467 -45.01 n/a n/a n/a
2023-11-14 2023-09-30 13F MAPLEBEAR COM Call 212,300 6,303 n/a n/a n/a
Disclosed Put 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
(%)
2026-05-15 2026-03-31 13F MAPLEBEAR COM Put 62,100 -93.81 2,326 -94.84 n/a n/a n/a
2026-02-17 2025-12-31 13F MAPLEBEAR COM Put 1,003,000 78.25 45,115 118.11 n/a n/a n/a
2025-11-14 2025-09-30 13F MAPLEBEAR COM Put 562,700 1.52 20,685 -17.51 n/a n/a n/a
2025-08-14 2025-06-30 13F MAPLEBEAR COM Put 554,300 21.13 25,077 37.38 n/a n/a n/a
2025-05-15 2025-03-31 13F MAPLEBEAR COM Put 457,600 -15.68 18,254 -18.80 n/a n/a n/a
2025-02-14 2024-12-31 13F MAPLEBEAR COM Put 542,700 76.20 22,479 79.15 n/a n/a n/a
2024-11-14 2024-09-30 13F MAPLEBEAR COM Put 308,000 -43.28 12,548 -28.11 n/a n/a n/a
2024-08-14 2024-06-30 13F MAPLEBEAR COM Put 543,000 -3.14 17,452 -16.51 n/a n/a n/a
2024-05-15 2024-03-31 13F MAPLEBEAR COM Put 560,600 53.46 20,905 143.84 n/a n/a n/a
2024-02-14 2023-12-31 13F MAPLEBEAR COM Put 365,300 90.06 8,574 50.25 n/a n/a n/a
2023-11-14 2023-09-30 13F MAPLEBEAR COM Put 192,200 5,706 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.