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Elefante Mark B — 13F Holdings & Portfolio

CIK 1661535 · latest 13F-HR filed 2026-08-13

Backtest portfolio

Elefante Mark B manages $232.2M in 13F-reported U.S. long-equity assets across 186 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are AMD (3.78%), GOOGL (3.56%), AMD (3.14%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 5 new positions and exited 3; 44 existing positions rose in reported value and 6 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$232.2M

Long-equity book

Holdings
186

Distinct positions

Period
2026-06-30

Filed 2026-08-13

Q/Q Activity
+5 / −3 / ↑44 / ↓6

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
AMD7.4% · +8%GOOGL6.7% · +4%NVDA5.9% · +22%AAPL5.4% · +11%ADI4.4% · -4%AMAT3.9% · +2%AMZN3.7% · +7%MA3.6% · +11%MSFT3.5% · +14%ROK3.5% · +10%TJX3.2% · +7%JNJ3.1% · +10%RTX2.8% · +12%SBGSF2.7% · newLLY2.5% · +22%PG2.5% · +8%ADP2.5% · +11%HD2.4% · +11%DHR2.3% · +6%ABT2.3% · +8%ATR2.1% · +4%VRTX2.0% · +14%XYL2.0% · +9%AXP1.9% · +24%CNI1.8% · +12%CVX1.7% · +17%SCHW1.7% · +28%NEE1.5% · +29%UBER1.4% · +17%ASML0.9% · +19%AVGO0.9% · +82%WCN0.9% · +109%CRWD0.7% · +31%ABBV0.5% · 0%XOM0.4% · 0%APH0.4% · -7%V0.4% · +146%DEMZ0.4% · +13%AMG RIVER0.4% · +15%NSRGY0.4% · +49%BRK.B0.3% · +7%MRK0.3% · 0%CP0.3% · +8%COST0.3% · 0%HON0.2% · -48%HONA0.2% · newUNP0.2% · 0%IVV0.2% · newNOVOZYMES A0.2% · +74%DE0.1% · 0%CARR0.1% · -88%GOOG0.1% · -8%PEP0.1% · -23%ECL0.1% · 0%SYK0.1% · 0%JPM0.1% · 0%FISV0.1% · -77%DOV0.1% · 0%AFL0.1% · newGS0.1% · new

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 48%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

Name Title / Status Ownership Type

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 44 →

Top Trims

Show all 6 →

New Positions

Show all 5 →

Exited Positions

Show all 3 →

Elefante Mark B Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 ADVANCED MICRO DEVICES AMD 007903107 $8.8M 3.78% 15,110 SH
2 ALPHABET INC CL A GOOGL 02079K305 $8.3M 3.56% 23,158 SH
3 ADVANCED MICRO DEVICES AMD 007903107 $7.3M 3.14% 12,538 SH
4 NVIDIA CORP NVDA 67066G104 $7.0M 3.00% 34,825 SH
5 APPLE AAPL 037833100 $6.5M 2.79% 22,377 SH
6 ALPHABET INC CL A GOOGL 02079K305 $6.2M 2.69% 17,472 SH
7 NVIDIA CORP NVDA 67066G104 $5.8M 2.49% 28,870 SH
8 ANALOG DEVICES ADI 032654105 $5.7M 2.46% 14,399 SH
9 APPLIED MATERIAL AMAT 038222105 $5.3M 2.27% 7,283 SH
10 APPLE AAPL 037833100 $5.2M 2.23% 17,860 SH
11 AMAZON.COM AMZN 023135106 $4.9M 2.11% 20,534 SH
12 MASTERCARD MA 57636Q104 $4.5M 1.94% 8,752 SH
13 MICROSOFT MSFT 594918104 $4.3M 1.86% 11,570 SH
14 ROCKWELL AUTOMATION ROK 773903109 $4.1M 1.75% 8,216 SH
15 TJX COS TJX 872540109 $4.0M 1.73% 26,477 SH
16 JOHNSON AND JOHNSON JNJ 478160104 $4.0M 1.72% 15,691 SH
17 RTX CORPORATION RTX 75513E101 $3.9M 1.70% 20,766 SH
18 ANALOG DEVICES ADI 032654105 $3.7M 1.60% 9,357 SH
19 MASTERCARD MA 57636Q104 $3.3M 1.43% 6,488 SH
20 SCHNEIDER ELEC SA ADR SBGSF 80687P106 $3.3M 1.43% 51,019 SH
21 ROCKWELL AUTOMATION ROK 773903109 $3.3M 1.42% 6,681 SH
22 PROCTER & GAMBLE PG 742718109 $3.2M 1.36% 21,568 SH
23 MICROSOFT MSFT 594918104 $3.2M 1.36% 8,446 SH
24 AUTOMATIC DATA PROCESSING ADP 053015103 $3.0M 1.31% 13,600 SH
25 AMAZON.COM AMZN 023135106 $3.0M 1.31% 12,766 SH
26 ELI LILLY & CO LLY 532457108 $3.0M 1.28% 2,478 SH
27 HOME DEPOT HD 437076102 $2.9M 1.25% 8,241 SH
28 APPLIED MATERIAL AMAT 038222105 $2.9M 1.24% 3,980 SH
29 ABBOTT LABS ABT 002824100 $2.9M 1.24% 31,659 SH
30 DANAHER CORP DHR 235851102 $2.9M 1.23% 14,994 SH
31 TJX COS TJX 872540109 $2.9M 1.23% 18,818 SH
32 JOHNSON AND JOHNSON JNJ 478160104 $2.8M 1.22% 11,115 SH
33 APTARGROUP ATR 038336103 $2.7M 1.15% 21,327 SH
34 CHEVRON CVX 166764100 $2.6M 1.11% 15,507 SH
35 VERTEX PHARMACEUTICALS VRTX 92532F100 $2.5M 1.09% 5,097 SH
36 ELI LILLY & CO LLY 532457108 $2.5M 1.06% 2,058 SH
37 SCHNEIDER ELEC SA ADR SBGSF 80687P106 $2.5M 1.06% 37,635 SH
38 AUTOMATIC DATA PROCESSING ADP 053015103 $2.3M 1.00% 10,376 SH
39 PROCTER & GAMBLE PG 742718109 $2.3M 0.99% 15,752 SH
40 AMERICAN EXPRESS AXP 025816109 $2.3M 0.98% 6,705 SH
41 DANAHER CORP DHR 235851102 $2.2M 0.96% 11,710 SH
42 HOME DEPOT HD 437076102 $2.2M 0.93% 6,152 SH
43 XYLEM INC XYL 98419M100 $2.2M 0.93% 18,331 SH
44 ABBOTT LABS ABT 002824100 $2.1M 0.90% 23,075 SH
45 CANADIAN NATL RAILWAY CNI 136375102 $2.0M 0.88% 17,138 SH
46 CHARLES SCHWAB SCHW 808513105 $2.0M 0.88% 22,114 SH
47 XYLEM INC XYL 98419M100 $2.0M 0.87% 17,073 SH
48 APTARGROUP ATR 038336103 $2.0M 0.86% 15,955 SH
49 RTX CORPORATION RTX 75513E101 $1.9M 0.83% 10,195 SH
50 CANADIAN NATL RAILWAY CNI 136375102 $1.8M 0.79% 15,385 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-13 $232.2M 186 0001661535-26-000003
2026-03-31 2026-05-15 $181.8M 187 0001661535-26-000002
2025-12-31 2026-02-17 $163.2M 244 0001661535-26-000001
2025-09-30 2025-11-10 $156.3M 222 0001661535-25-000004
Filer Information
Address
75 STATE STREET
15TH FLOOR
BOSTON, MA 02109
Phone
(617) 619-8258
Filing Manager
Elefante Mark B
BOSTON, MA
Signatory
Alicia L Fazzone
Operations Manager