FMR, LLC
Rank #1
13.8%
- Shares
- 10.53M
- Change %
- -0.79%
- Filing
- Jun 30, 2026
Decreased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
Holders
MACOM Technology Solutions (MTSI) Institutional Ownership & Insider Trading History
Top MTSI institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Section freshness
Prices as of Sep 18, 4:00 PM EDT · Fundamentals checked Sep 19, 1:02 PM EDT · Statements Jul 3, 2026
Ownership read
MTSI insider sentiment: Net selling.
FMR, LLC is the largest institutional holder. 71 sales and 0 purchases appear in the recent Form 4 filings. Use the filters below to separate open-market activity from option exercises, gifts, awards, and tax withholding.
Insider flow
MTSI
Purchases0
Sales4.52M
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
10.53M
FMR, LLC
Insider stance
Net selling
$721.21M sold / $0.0000 bought
Latest filing
Aug 28, 2026
Most recent holder or insider filing date
Filings shown
150
30 holder / 120 insider
- Holder rows
- 30
- Market data source
- Latest filing
- Aug 28, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 12
- 8 decreased
- Insider rows
- 120
- Market data source
Top 30 institutional holders
MACOM Technology Solutions (MTSI) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where ownership data supplies them.
Blackrock Inc.
Rank #2
12.5%
- Shares
- 9.51M
- Change %
- +11.05%
- Filing
- Jun 30, 2026
Increased
Vanguard Portfolio Management LLC
Rank #3
4.72%
- Shares
- 3.61M
- Change %
- +0.51%
- Filing
- Jun 30, 2026
Increased
Vanguard Capital Management LLC
Rank #4
4.01%
- Shares
- 3.06M
- Change %
- +2.40%
- Filing
- Jun 30, 2026
Increased
T. Rowe Price Investment Management, Inc.
Rank #5
3.73%
- Shares
- 2.85M
- Change %
- -36.47%
- Filing
- Jun 30, 2026
Decreased
State Street Corporation
Rank #6
2.96%
- Shares
- 2.26M
- Change %
- +5.09%
- Filing
- Jun 30, 2026
Increased
Invesco Ltd.
Rank #7
2.81%
- Shares
- 2.15M
- Change %
- -41.49%
- Filing
- Jun 30, 2026
Decreased
JPMORGAN CHASE & CO
Rank #8
2.78%
- Shares
- 2.13M
- Change %
- +5.43%
- Filing
- Jun 30, 2026
Increased
Geode Capital Management, LLC
Rank #9
1.85%
- Shares
- 1.41M
- Change %
- +3.69%
- Filing
- Jun 30, 2026
Increased
Wellington Management Group, LLP
Rank #10
1.58%
- Shares
- 1.21M
- Change %
- -22.11%
- Filing
- Jun 30, 2026
Decreased
Fidelity Select Portfolios-Select Semiconductors Portfolio
Rank #11
5.00%
- Shares
- 3.82M
- Change %
- -0.44%
- Filing
- Jul 31, 2026
Decreased
iShares Trust-iShares Core S&P Mid-Cap ETF
Rank #12
2.95%
- Shares
- 2.25M
- Change %
- +0.37%
- Filing
- Jul 31, 2026
Increased
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund
Rank #13
2.85%
- Shares
- 2.18M
- Change %
- +1.63%
- Filing
- Jun 30, 2026
Increased
iShares Trust-iShares Semiconductor ETF
Rank #14
2.28%
- Shares
- 1.74M
- Change %
- +18.14%
- Filing
- Jul 31, 2026
Increased
VANGUARD INDEX FUNDS-Vanguard Small-Cap Index Fund
Rank #15
2.06%
- Shares
- 1.57M
- Change %
- +1.17%
- Filing
- Jun 30, 2026
Increased
T. Rowe Price Mid-Cap Growth Fund, Inc.
Rank #16
1.55%
- Shares
- 1.19M
- Change %
- -16.06%
- Filing
- Jun 30, 2026
Decreased
SmallCap World Fund Inc
Rank #17
1.38%
- Shares
- 1.06M
- Change %
- -1.88%
- Filing
- Jun 30, 2026
Decreased
VANGUARD INDEX FUNDS-Vanguard Small-Cap Growth Index Fund
Rank #18
1.19%
- Shares
- 907.83K
- Change %
- +4.22%
- Filing
- Jun 30, 2026
Increased
Fidelity Securities Fund-Fidelity OTC Portfolio
Rank #19
1.12%
- Shares
- 858.70K
- Change %
- +1.66%
- Filing
- Jul 31, 2026
Increased
BlackRock ETF Trust-iShares A.I. Innovation and Tech Active ETF
Rank #20
1.06%
- Shares
- 809.81K
- Change %
- -4.07%
- Filing
- Jul 31, 2026
Decreased
| # | Institution | % held | Shares | Filing date |
|---|---|---|---|---|
| 1 | 13.8% | 10.53M | Jun 30, 2026 | |
| 2 | 12.5% | 9.51M | Jun 30, 2026 | |
| 3 | 4.72% | 3.61M | Jun 30, 2026 | |
| 4 | 4.01% | 3.06M | Jun 30, 2026 | |
| 5 | 3.73% | 2.85M | Jun 30, 2026 | |
| 6 | 2.96% | 2.26M | Jun 30, 2026 | |
| 7 | 2.81% | 2.15M | Jun 30, 2026 | |
| 8 | 2.78% | 2.13M | Jun 30, 2026 | |
| 9 | 1.85% | 1.41M | Jun 30, 2026 | |
| 10 | 1.58% | 1.21M | Jun 30, 2026 | |
| 11 | 5.00% | 3.82M | Jul 31, 2026 | |
| 12 | iShares Trust-iShares Core S&P Mid-Cap ETF | 2.95% | 2.25M | Jul 31, 2026 |
| 13 | 2.85% | 2.18M | Jun 30, 2026 | |
| 14 | iShares Trust-iShares Semiconductor ETF | 2.28% | 1.74M | Jul 31, 2026 |
| 15 | 2.06% | 1.57M | Jun 30, 2026 | |
| 16 | 1.55% | 1.19M | Jun 30, 2026 | |
| 17 | SmallCap World Fund Inc | 1.38% | 1.06M | Jun 30, 2026 |
| 18 | 1.19% | 907.83K | Jun 30, 2026 | |
| 19 | 1.12% | 858.70K | Jul 31, 2026 | |
| 20 | 1.06% | 809.81K | Jul 31, 2026 |
Showing 20 of 30 matching institutional rows.
Recent insider transactions
MACOM Technology Solutions (MTSI) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
DENNEHY ROBERT B
Chief Operating Officer
- Shares
- 252
- % company
- <0.01%
- Price
- $275.20
- Value
- $69,350
Filed Aug 28, 2026
KOBER JOHN F. III
Chief Financial Officer
- Shares
- 7.39K
- % company
- <0.01%
- Price
- $326.08
- Value
- $2,409,423
Filed Aug 17, 2026
HWANG DONGHYUN THOMAS
Officer
- Shares
- 2.62K
- % company
- <0.01%
- Price
- $383.87
- Value
- $1,005,732
Filed Jun 25, 2026
DALY STEPHEN G
Chief Executive Officer
- Shares
- 15.83K
- % company
- 0.02%
- Price
- $365.75
- Value
- $5,789,100
Filed May 29, 2026
BLAND CHARLES R
Director
- Shares
- 700
- % company
- <0.01%
Filed May 19, 2026
SHANMUGARAJ MURUGESAN
Director
- Shares
- 1.40K
- % company
- <0.01%
Filed May 19, 2026
KOBER JOHN F. III
Chief Financial Officer
- Shares
- 7.64K
- % company
- 0.01%
- Price
- $359.25
- Value
- $2,746,143
Filed May 18, 2026
HWANG DONGHYUN THOMAS
Officer
- Shares
- 2.60K
- % company
- <0.01%
- Price
- $360.64
- Value
- $935,871
Filed May 18, 2026
KOBER JOHN F. III
Chief Financial Officer
- Shares
- 108
- % company
- <0.01%
- Price
- $375.60
- Value
- $40,565
Filed May 15, 2026
HWANG DONGHYUN THOMAS
Officer
- Shares
- 85
- % company
- <0.01%
- Price
- $375.60
- Value
- $31,926
Filed May 15, 2026
DENNEHY ROBERT B
Chief Operating Officer
- Shares
- 146
- % company
- <0.01%
- Price
- $375.60
- Value
- $54,838
Filed May 15, 2026
CHUNG PETER Y
Director
- Shares
- 43.27K
- % company
- 0.06%
- Price
- $378.20
- Value
- $16,363,923
Filed May 14, 2026
| # | Insider | % company | Action | Shares | Filing date |
|---|---|---|---|---|---|
| 1 | DENNEHY ROBERT B Chief Operating Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 252 | Aug 28, 2026 |
| 2 | KOBER JOHN F. III Chief Financial Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 7.39K | Aug 17, 2026 |
| 3 | HWANG DONGHYUN THOMAS Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 2.62K | Jun 25, 2026 |
| 4 | DALY STEPHEN G Chief Executive Officer | 0.02% | SaleOpen-market or direct sale reported on Form 4. | 15.83K | May 29, 2026 |
| 5 | BLAND CHARLES R Director | <0.01% | Stock GiftProvider-supplied Form 4 action code. Review the original filing before making a trading judgment. | 700 | May 19, 2026 |
| 6 | SHANMUGARAJ MURUGESAN Director | <0.01% | Stock GiftProvider-supplied Form 4 action code. Review the original filing before making a trading judgment. | 1.40K | May 19, 2026 |
| 7 | KOBER JOHN F. III Chief Financial Officer | 0.01% | SaleOpen-market or direct sale reported on Form 4. | 7.64K | May 18, 2026 |
| 8 | HWANG DONGHYUN THOMAS Officer | <0.01% | SaleOpen-market or direct sale reported on Form 4. | 2.60K | May 18, 2026 |
| 9 | KOBER JOHN F. III Chief Financial Officer | <0.01% | Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment. | 108 | May 15, 2026 |
| 10 | HWANG DONGHYUN THOMAS Officer | <0.01% | Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment. | 85 | May 15, 2026 |
| 11 | DENNEHY ROBERT B Chief Operating Officer | <0.01% | Stock Award(Grant)Provider-supplied Form 4 action code. Review the original filing before making a trading judgment. | 146 | May 15, 2026 |
| 12 | CHUNG PETER Y Director | 0.06% | SaleOpen-market or direct sale reported on Form 4. | 43.27K | May 14, 2026 |
Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding.
Frequently asked
Common questions.
Who are the largest MTSI shareholders?
FMR, LLC is the largest reported institutional holder of MTSI, with 10.53 million shares, or about 13.78% of shares outstanding.
What does the institutional filing activity show for MTSI?
MACOM Technology Solutions has 30 institutional rows on file: 12 increased or initiated positions and 8 reduced them as of Aug 28, 2026.
What insider transactions are available for MTSI?
TECHi shows 120 dated MTSI insider transactions through Aug 28, 2026, with transaction types kept separate so administrative actions are not presented as open-market trades.
Are MTSI insiders buying or selling?
The displayed MTSI activity reads Net selling: 71 sales and 0 purchases. Other transaction types remain separate.
Who is the most active reported MTSI insider?
OCAMPO SUSAN has the largest absolute share movement in the displayed MTSI filing rows, totaling 4.78 million shares. The action labels provide the transaction context.