Mid-America Apartment Communities, Inc.

The full register, from 13F filings

The Register tab above is hand research: a dozen holders, each traced to the filing it came from. This asks the same question of the whole market for the quarter ended 31-mar-2026, where 740 managers reported a position. Broad where the research is deep, and shallow in the ways a 13F always is.

Built from 13F filings, which report US listed, long, US custodied positions only. A register from this source is a floor rather than a level: a holder's true position can be far larger, as BlackRock's ASML stake shows at 1.28m shares in a 13F against 26.3m in its 13G/A. Holdings held through derivatives, outside US custody, or below a manager's reporting obligation do not appear. Where a holder is marked as a family, its total sums several separate filing entities and describes something no single filing describes; the constituent entities and their share counts are listed so the total can be checked. That roll-up can legitimately exceed the family's own Schedule 13G, because a 13G is filed by one legal entity: Vanguard reports Alphabet through ten advisory entities, and The Vanguard Group Inc itself reported zero after its January 2026 disaggregation.

What a reader needs to know to read these numbers

• MAA is an UPREIT and files a COMBINED 10-Q/10-K with its operating partnership, Mid-America Apartments, L.P. (MAALP). shares_outstanding (116,021,957) is the REIT's cover-page common stock count as of 27 Jul 2026 from the combined Q2 2026 10-Q (CIK 0000912595, Mid-America Apartment Communities, Inc.), NOT the operating partnership's OP Unit count. As of 30 Jun 2026 the 10-Q separately discloses MAALP had 118,944,528 total OP Units outstanding, of which 116,015,088 (97.5%) are Class B OP Units held by MAA itself as general partner (these correspond to, but are not identical in count to, MAA's own common shares outstanding, the small difference being timing/rounding across the two entities' respective balance-sheet and cover-page dates) and 2,929,440 are Class A OP Units held by third-party limited partners (redeemable common units), which are NOT MAA common stock and are excluded from this file's register and denominator throughout. No single third-party OP-unit holder large enough to place in the register (above the top 8-12 institutional/insider cut) was identified in this research; the only OP-unit detail found was H. Eric Bolton, Jr.'s and Claude B. Nielsen's individual rights to redeem specific LP unit quantities (110,000 and 2,111 respectively), already folded into their beneficial-ownership share counts in the register's insider row per standard SEC beneficial-ownership convention, not double-counted or added separately.
• Every register row is denominated on ONE basis: 116,021,957 MAA common shares outstanding (27 Jul 2026 10-Q cover page). The one insider row (proxy group total) is sourced to a proxy table computed on a slightly different, close-but-not-identical share count (116,347,636 shares outstanding on the 13 Mar 2026 proxy record date); its pct_of_company (0.6%) is the proxy's own stated figure on its own basis, not recomputed, and this difference is noted in that row's pct_denominator rather than silently blended.
• T. Rowe Price Associates, Inc.'s Q2 2026 13F-HR reports its 'value' column in THOUSANDS of dollars, not whole dollars: the raw filed total for MAA (168,664 shares) was $23,435, which implied an absurd $0.14/share against every other holder's $138.94/share. Corrected to $23,435,000 (value_usd) per the project's documented T. Rowe Price/Cohen & Steers thousands-convention. An implied-price check (value_usd / shares) was run on every institutional register row; all rows land within $138 to $141/share except before this correction was applied to the T. Rowe Price row.
• Cohen & Steers was checked and holds NOTHING: its operating registrant, Cohen & Steers, Inc. (CIK 0001284812), filed a fresh Q2 2026 13F-HR (442 information-table rows) with no line under MAA's CUSIP 59522J103; its two other registered entities (Cohen & Steers Capital Management Inc, Cohen & Steers UK Ltd) filed 13F-NT (no holdings) for the same quarter. Recorded here as a note, not a null row, per the project's convention that a checked, confirmed-zero holder is not a register row.
• The Capital Group family was checked and holds NOTHING: all 11 Capital Group-affiliated CIKs identified (Capital Research & Management Co 0000017283 [13F-NT], Capital Research Global Investors 0001422848, Capital International, Inc./CA/ 0000895213, Capital International Ltd /CA/ 0001065350, Capital International Sarl 0001065349, Capital World Investors 0001422849, Capital Group Companies, Inc. 0000732812 [13F-NT], Capital Group International, Inc. 0000949308 [13F-NT], Capital Group Investment Management Pte. Ltd. 0001939970, Capital Group Private Client Services, Inc. 0001857666, Capital International Investors 0001562230) were checked against their own fresh Q2 2026 filings (8 of the 11 filed 13F-HR with holdings; 3 filed 13F-NT); CUSIP 59522J103 is absent from every one of the 8 information tables checked. No Capital Group register row is included.
• No Schedule 13D has ever been filed against MAA; the company's full SC 13 filing history (checked via EDGAR company search) is entirely Schedule 13G/13G-A filings, i.e. exclusively passive institutional holders, consistent with a broadly diffuse REIT shareholder base with no activist or control-seeking strategic holder. This is why the register here is entirely index/active-institutional plus one insider aggregate row, with no 'strategic' or 'sovereign' holder_type row.
• HOLDINGS SIDE: searched the Q2 2026 10-Q (period 30 Jun 2026) and the FY2025 10-K (period 31 Dec 2025, filed 6 Feb 2026, the more recent of the two annual/quarterly filings since MAA's fiscal year ends 31 Dec) for 'equity method', 'unconsolidated', 'joint venture', 'technology fund', 'preferred equity investment', and checked Exhibit 21.1 (list of subsidiaries) of the 10-K for a percentage-ownership column. Findings: MAA accounts for (1) one unconsolidated real estate joint venture (equity-method investment of $41.9 million at 30 Jun 2026, one apartment community) and (2) six technology-focused limited partnerships that each qualify as VIEs (combined equity-method investment of $100.9 million at 30 Jun 2026, up from $78.2 million at 31 Dec 2025), both disclosed only as aggregate dollar balances with NO name, no individual ownership percentage, and no per-investee split anywhere in the 10-Q, the 10-K, or Exhibit 21.1 (which is a plain alphabetical-by-state subsidiary name list with no percentage column and none of the technology partnerships or the joint venture named on it). Per the project's rule against assigning a combined equity-method balance to one investee, and because none of the seven vehicles (1 JV + 6 LPs) is even named, no holdings row was created for any of them; the two combined balances are recorded here and in unknowns instead of as sourced but unnamed/unsized holding rows.
• SELF-GATE (computed from the FINAL file on disk per the project's chart arithmetic: members at full value, any aggregate reduced only by members that roll into it): 12 register rows, no rolls_up_into members present (the one is_aggregate row's disclosed members already sum to its own total with zero residual, so nothing is subtracted). Raw share sum across all 12 rows = 60,557,838 shares. 60,557,838 / 116,021,957 shares_outstanding = 52.20%. This is above the doc's typical 25-45% band but below its 55% ceiling: plausible for a heavily institutionally-owned REIT with a full 10-entity Vanguard family sweep, three freshly-refreshed large index/passive holders (Vanguard, BlackRock, State Street alone total 34.35%), and no strategic/sovereign holder diluting the top ranks with a large non-institutional position. No double-counted holder or mixed-basis row was found on inspection; MAA's own DEF 14A discloses no 13D activist holder and no dual-class/founder structure that would otherwise depress or inflate this figure.