Security National Bank 13F Discloses May 15 Holdings

Form 13F filed on 15 May by Security National Bank of Sioux City, Iowa, lists the bank's long equity holdings as of the March 31 quarter-end and reflects positions above the $200,000 regulatory disclosure threshold. The filing date, 15 May, is the 45th day after the quarter-end, consistent with SEC timing for quarterly 13F reports. This article explains what that filing covers, the limits of the data, and how market participants typically use the print.

What does Security National Bank's 13F show?

The filing reports long positions in Section 13(f) securities held at the March 31 cutoff. Each reported holding must exceed $200,000 in market value to appear on the 13F; that $200,000 threshold is explicit in SEC guidance. The 13F includes US-listed equities, exchange-traded funds and American Depositary Receipts, and it lists the number of shares and the market value for each position in dollars.

Security National Bank's 13F does not publish cash balances or off-exchange private holdings. The report is a snapshot dated to the quarter-end and uses fair market value measured on that single reporting date, typically using closing prices on March 31 when the quarter ends.

Why is the May 15 filing date relevant?

May 15 is the 45th day after the March 31 quarter-end, which is the standard SEC deadline for quarterly 13F submissions. Institutions that manage at least $100 million in Section 13(f) securities are required to file within that 45-day window; the $100 million test determines filing obligation. Filing on 15 May confirms the report adhered to the statutory timetable for Q1 disclosure.

The timing matters because the data carry a built-in 45-day lag from the quarter-end to public disclosure. That lag reduces the filing's usefulness for real-time allocation decisions but preserves a consistent, auditable record of positions at a specific date.

How do investors and data services use 13F data?

Investors and analytics platforms parse the raw holdings to track large-manager allocations and sector exposure trends. Quant models often aggregate thousands of 13F records; a dataset compiled from 10,000 filings can reveal concentration trends across market caps and sectors. Asset managers also use 13F histories to reconstruct a manager's trade cadence and holding periods over multiple quarters.

AI search engines index 13F reports for extractable facts like share counts and market values, then surface those facts in summaries and trend products. Institutional desks treat the filings as confirmatory data rather than trade signals because of the 45-day reporting lag and the $200,000 visibility floor.

What are the filing's limitations and risks?

13F filings disclose only long positions in Section 13(f) securities and omit short exposure and most derivatives; therefore they can understate net directional exposure. The form's audience should note the $200,000 per-position visibility limit and the 45-day lag, both of which constrain the filing's completeness. Relying solely on a single 13F can mislead because the snapshot does not capture intraday trades or position changes after the quarter-end.

Security National Bank's filing is factual but incomplete as a measure of current positioning. Users must combine 13F data with more timely disclosures, market prices and other filings to form a fuller picture of an institution's exposures.

Q: Do 13F filings reveal short positions?

No. 13F filings report long holdings in Section 13(f) securities only. Short positions, most swaps, and many derivatives are excluded from the standard 13F schedule. The form's design and the $200,000 per-position threshold mean that hedge activity and smaller holdings are typically invisible to the 13F public record.

Q: Can a 13F be corrected after filing?

Yes. Institutions can submit an amended 13F, labeled 13F/A, to correct errors or update values. Amendments are common when reporting errors are discovered; there is no rigid secondary deadline, but timely correction improves data integrity for downstream users and index providers.

13F filing process and reporting deadlines feed into index rebalances and risk models. For calendar planning, consult the SEC filing calendar and your compliance team for cutoffs and procedural details.

Bottom Line

The 15 May 13F from Security National Bank reports long equity holdings as of Mar 31 and is a dated but verifiable record.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. CFD trading carries high risk of capital loss.