SI-BONE, Inc.
US ˙ NasdaqGM ˙ US8257041090

SecuritySIBN / SI-BONE, Inc.
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership70,238 shares
Latest Disclosed Value $ 1,321,879
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series ownership in SIBN / SI-BONE, Inc.

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 70,238 shares of SI-BONE, Inc. (US:SIBN) valued at $1,321,879 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 70,238 shares of SI-BONE, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,061,999 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.

Upgrade to unlock premium data and export to Excel .

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)
2025-08-26 2025-06-30 NP SI-BONE EC US8257041090 70,238 0 0.00 1,322 34.11 0.0297
2025-05-28 2025-03-31 NP SI-BONE EC US8257041090 70,238 0 0.00 985 0.10 0.0236
2025-02-25 2024-12-31 NP SI-BONE EC US8257041090 70,238 -10,921 -13.46 985 -13.23 0.0215
2024-11-26 2024-09-30 NP SI-BONE EC US8257041090 81,159 7,009 9.45 1,135 18.37 0.0215
2024-08-26 2024-06-30 NP SI-BONE EC US8257041090 74,150 10,100 15.77 959 -8.59 0.0195
2024-05-28 2024-03-31 NP SI-BONE EC US8257041090 64,050 0 0.00 1,048 -22.02 0.0219
2024-02-26 2023-12-31 NP SI-BONE EC US8257041090 64,050 4,804 8.11 1,344 6.84 0.0287
2023-11-28 2023-09-30 NP SI-BONE EC US8257041090 59,246 -1,687 -2.77 1,258 -23.43 0.0328
2023-08-25 2023-06-30 NP SI-BONE EC US8257041090 60,933 6,483 11.91 1,644 53.41 0.0390
2023-05-26 2023-03-31 NP SI-BONE EC US8257041090 54,450 0 0.00 1,071 44.73 0.0285
2023-02-24 2022-12-31 NP SI-BONE EC US8257041090 54,450 0 0.00 741 -22.11 0.0204
2022-11-25 2022-09-30 NP SI-BONE EC US8257041090 54,450 2,780 5.38 951 39.30 0.0272
2022-08-25 2022-06-30 NP SI-BONE EC US8257041090 51,670 0 0.00 682 -41.56 0.0188
2022-05-26 2022-03-31 NP SI-BONE EC US8257041090 51,670 0 0.00 1,168 1.74 0.0272
2022-02-25 2021-12-31 NP SI-BONE EC US8257041090 51,670 0 0.00 1,148 3.71 0.0249
2021-11-24 2021-09-30 NP SI-BONE EC US8257041090 51,670 0 0.00 1,107 -31.98 0.0244
2021-08-26 2021-06-30 NP SI-BONE EC US8257041090 51,670 7,245 16.31 1,626 15.07 0.0349
2021-05-27 2021-03-31 NP SI-BONE EC US8257041090 44,425 1,954 4.60 1,413 11.35 0.0320
2021-02-25 2020-12-31 NP SI-BONE EC US8257041090 42,471 -774 -1.79 1,270 23.80 0.0325
2020-11-25 2020-09-30 NP SI-BONE EC US8257041090 43,245 0 0.00 1,026 48.77 0.0329
2020-08-27 2020-06-30 NP SI-BONE EC US8257041090 43,245 12,549 40.88 689 88.25 0.0225
2020-06-01 2020-03-31 NP SI-BONE EC US8257041090 30,696 6,101 24.81 367 -30.68 0.0150
2020-02-27 2019-12-31 NP SI-BONE EC 825704109 24,595 371 1.53 529 23.36 0.0159
2019-11-27 2019-09-30 NP SI-BONE EC US8257041090 24,224 24,224 428 0.0141
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.