SecurityUS9219463075 / Vanguard Mid-Cap Growth Fund
InstitutionSimplex Trading, Llc
Simplex Trading, Llc ownership in US9219463075 / Vanguard Mid-Cap Growth Fund

Simplex Trading, Llc has a history of taking positions in derivatives of the underlying security () in the form of stock options. The firm currently holds call options representing 84,500 of underlying shares valued at $12,284,954 USD and put options representing 5,600 of underlying shares valued at $691,242 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 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.

US9219463075 / Vanguard Mid-Cap Growth Fund Historical Put/Call Ratio
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
(%)
2026-05-14 2026-03-31 13F VANGUARD WHITEHALL FDS CALL Call 84,500 -1.63 12,285 0.63 n/a n/a n/a
2026-02-11 2025-12-31 13F VANGUARD WHITEHALL FDS CALL Call 85,900 57.04 12,208 174,285.71 n/a n/a n/a
2025-11-12 2025-09-30 13F VANGUARD WHITEHALL FDS CALL Call 54,700 64.76 8 75.00 n/a n/a n/a
2025-08-05 2025-06-30 13F VANGUARD WHITEHALL FDS CALL Call 33,200 -25.23 4 -20.00 n/a n/a n/a
2025-05-12 2025-03-31 13F VANGUARD WHITEHALL FDS CALL Call 44,400 1.14 6 0.00 n/a n/a n/a
2025-02-11 2024-12-31 13F VANGUARD WHITEHALL FDS CALL Call 43,900 19.95 5 25.00 n/a n/a n/a
2024-11-08 2024-09-30 13F VANGUARD WHITEHALL FDS CALL Call 36,600 24.07 4 33.33 n/a n/a n/a
2024-07-25 2024-06-30 13F VANGUARD WHITEHALL FDS CALL Call 29,500 -5.45 3 0.00 n/a n/a n/a
2024-04-25 2024-03-31 13F VANGUARD WHITEHALL FDS CALL Call 31,200 -24.64 4 -25.00 n/a n/a n/a
2024-02-02 2023-12-31 13F VANGUARD WHITEHALL FDS CALL Call 41,400 38.93 4 33.33 n/a n/a n/a
2023-11-01 2023-09-30 13F VANGUARD WHITEHALL FDS CALL Call 29,800 -8.02 3 0.00 n/a n/a n/a
2023-08-04 2023-06-30 13F VANGUARD WHITEHALL FDS CALL Call 32,400 -44.33 3 -40.00 n/a n/a n/a
2023-04-27 2023-03-31 13F VANGUARD WHITEHALL FDS CALL Call 58,200 30.79 6 25.00 n/a n/a n/a
2023-02-02 2022-12-31 13F VANGUARD WHITEHALL FDS CALL Call 44,500 20.27 5 -99.88 n/a n/a n/a
2022-11-04 2022-09-30 13F VANGUARD WHITEHALL FDS CALL Call 37,000 -19.57 3,456 -25.87 n/a n/a n/a
2022-08-03 2022-06-30 13F VANGUARD WHITEHALL FDS CALL Call 46,000 19.17 4,662 7.89 n/a n/a n/a
2022-05-02 2022-03-31 13F VANGUARD WHITEHALL FDS CALL Call 38,600 107.53 4,321 108.34 n/a n/a n/a
2022-02-23 2021-12-31 13F/A VANGUARD WHITEHALL FDS CALL Call 18,600 -29.81 2,074 -25.74 n/a n/a n/a
2022-02-04 2021-12-31 13F VANGUARD WHITEHALL FDS CALL Call 26,500 2,793 n/a n/a n/a
2021-10-28 2021-09-30 13F VANGUARD WHITEHALL FDS CALL Call 26,500 0.76 2,793 1.38 n/a n/a n/a
2021-08-12 2021-06-30 13F VANGUARD WHITEHALL FDS CALL Call 26,300 12,019.82 2,755 8,787.10 n/a n/a n/a
2021-04-26 2021-03-31 13F VANGUARD WHITEHALL FDS CALL Call 217 -37.64 31 -99.03 n/a n/a n/a
2021-02-02 2020-12-31 13F VANGUARD WHITEHALL FDS CALL Call 348 -54.57 3,184 -48.64 n/a n/a n/a
2020-10-14 2020-09-30 13F VANGUARD WHITEHALL FDS CALL Call 766 30.49 6,199 34.06 n/a n/a n/a
2020-07-13 2020-06-30 13F VANGUARD WHITEHALL FDS CALL Call 587 66.76 4,624 85.70 n/a n/a n/a
2020-04-29 2020-03-31 13F VANGUARD WHITEHALL FDS CALL Call 352 107.06 2,490 56.31 n/a n/a n/a
2020-02-05 2019-12-31 13F VANGUARD WHITEHALL FDS CALL Call 170 -34.62 1,593 -30.92 n/a n/a n/a
2019-10-15 2019-09-30 13F VANGUARD WHITEHALL FDS CALL Call 260 -9.41 2,306 -8.02 n/a n/a n/a
2019-07-26 2019-06-30 13F VANGUARD WHITEHALL FDS CALL Call 287 889.66 2,507 910.89 n/a n/a n/a
2019-04-18 2019-03-31 13F VANGUARD WHITEHALL FDS CALL Call 29 107.14 248 127.52 n/a n/a n/a
2019-01-16 2018-12-31 13F VANGUARD WHITEHALL FDS CALL Call 14 55.56 109 39.74 n/a n/a n/a
2018-10-23 2018-09-30 13F VANGUARD WHITEHALL FDS CALL Call 9 -93.57 78 -93.29 n/a n/a n/a
2018-07-30 2018-06-30 13F VANGUARD WHITEHALL FDS CALL Call 140 -9.09 1,162 7,162.50 n/a n/a n/a
2018-04-26 2018-03-31 13F VANGUARD WHITEHALL FDS CALL Call 154 -35.83 16 -65.22 n/a n/a n/a
2018-01-10 2017-12-31 13F VANGUARD WHITEHALL FDS CALL Call 240 110.53 46 119.05 n/a n/a n/a
2017-10-25 2017-09-30 13F VANGUARD WHITEHALL FDS CALL Call 114 -40.31 21 133.33 n/a n/a n/a
2017-07-12 2017-06-30 13F VANGUARD WHITEHALL FDS CALL Call 191 45.80 9 80.00 n/a n/a n/a
2017-04-21 2017-03-31 13F VANGUARD WHITEHALL FDS CALL Call 131 424.00 5 25.00 n/a n/a n/a
2017-01-11 2016-12-31 13F VANGUARD WHITEHALL FDS CALL Call 25 -69.88 4 -50.00 n/a n/a n/a
2016-10-07 2016-09-30 13F VANGUARD WHITEHALL FDS CALL Call 83 207.41 8 100.00 n/a n/a n/a
2016-07-18 2016-06-30 13F VANGUARD WHITEHALL FDS CALL Call 27 285.71 4 100.00 n/a n/a n/a
2016-04-14 2016-03-31 13F VANGUARD WHITEHALL FDS CALL Call 7 16.67 2 n/a n/a n/a
2016-01-20 2015-12-31 13F VANGUARD WHITEHALL FDS CALL Call 6 50.00 0 n/a n/a n/a
2015-10-08 2015-09-30 13F VANGUARD WHITEHALL FDS CALL Call 4 0 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
(%)
2026-05-14 2026-03-31 13F VANGUARD WHITEHALL FDS PUT Put 5,600 5.66 691 2.37 n/a n/a n/a
2026-02-11 2025-12-31 13F VANGUARD WHITEHALL FDS PUT Put 5,300 -95.56 675 8,337.50 n/a n/a n/a
2025-11-12 2025-09-30 13F VANGUARD WHITEHALL FDS PUT Put 119,400 1,765.62 8 n/a n/a n/a
2025-08-05 2025-06-30 13F VANGUARD WHITEHALL FDS PUT Put 6,400 -7.25 1 n/a n/a n/a
2025-05-12 2025-03-31 13F VANGUARD WHITEHALL FDS PUT Put 6,900 228.57 1 n/a n/a n/a
2025-02-11 2024-12-31 13F VANGUARD WHITEHALL FDS PUT Put 2,100 -70.42 0 n/a n/a n/a
2024-11-08 2024-09-30 13F VANGUARD WHITEHALL FDS PUT Put 7,100 73.17 1 n/a n/a n/a
2024-07-25 2024-06-30 13F VANGUARD WHITEHALL FDS PUT Put 4,100 41.38 0 n/a n/a n/a
2024-04-25 2024-03-31 13F VANGUARD WHITEHALL FDS PUT Put 2,900 -81.17 0 -100.00 n/a n/a n/a
2024-02-02 2023-12-31 13F VANGUARD WHITEHALL FDS PUT Put 15,400 -35.29 2 -50.00 n/a n/a n/a
2023-11-01 2023-09-30 13F VANGUARD WHITEHALL FDS PUT Put 23,800 60.81 2 100.00 n/a n/a n/a
2023-08-04 2023-06-30 13F VANGUARD WHITEHALL FDS PUT Put 14,800 -29.86 2 -50.00 n/a n/a n/a
2023-04-27 2023-03-31 13F VANGUARD WHITEHALL FDS PUT Put 21,100 77.31 2 100.00 n/a n/a n/a
2023-02-02 2022-12-31 13F VANGUARD WHITEHALL FDS PUT Put 11,900 -68.18 1 -99.97 n/a n/a n/a
2022-11-04 2022-09-30 13F VANGUARD WHITEHALL FDS PUT Put 37,400 -37.87 3,513 -41.84 n/a n/a n/a
2022-08-03 2022-06-30 13F VANGUARD WHITEHALL FDS PUT Put 60,200 554.35 6,040 537.80 n/a n/a n/a
2022-05-02 2022-03-31 13F VANGUARD WHITEHALL FDS PUT Put 9,200 -92.37 947 -92.97 n/a n/a n/a
2022-02-23 2021-12-31 13F/A VANGUARD WHITEHALL FDS PUT Put 120,500 186.90 13,477 207.06 n/a n/a n/a
2022-02-04 2021-12-31 13F VANGUARD WHITEHALL FDS PUT Put 42,000 4,389 n/a n/a n/a
2021-10-28 2021-09-30 13F VANGUARD WHITEHALL FDS PUT Put 42,000 0.48 4,389 1.11 n/a n/a n/a
2021-08-12 2021-06-30 13F VANGUARD WHITEHALL FDS PUT Put 41,800 6,441.47 4,341 61,914.29 n/a n/a n/a
2021-04-26 2021-03-31 13F VANGUARD WHITEHALL FDS PUT Put 639 7 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.