Arista Networks insider activity
What the executives and directors of Arista Networks actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
−$1.4B
net open-market flow, 12 m
0 open-market buys, 12 m
100%
of sale value on 10b5-1 plans, 12 m
– no insider buy on record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so prices and share counts reported before then are restated to today's basis here; otherwise the tape would show a step the shares never took.
The 199 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| Oct 20, 2026 | Duda Kenneth | 17K |
| Sep 21, 2026 | Duda Kenneth | 17K |
| Aug 20, 2026 | TEMPLETON MARK B | 538 |
| Aug 20, 2026 | CHEW LEWIS | 538 |
| Aug 20, 2026 | Giancarlo Charles H | 538 |
| Aug 20, 2026 | Scheinman Daniel | 538 |
| Aug 20, 2026 | Duda Kenneth | 64K |
| Aug 20, 2026 | Ullal Jayshree | 42K |
| Aug 20, 2026 | Wassenaar Yvonne | 538 |
| Aug 20, 2026 | Battles Kelly Bodnar | 538 |
| Aug 20, 2026 | Breithaupt Chantelle Yvette | 18K |
| Aug 20, 2026 | Nightingale Todd | 190K |
| Aug 20, 2026 | Lavender Robert G | 538 |
| Jul 20, 2026 | Duda Kenneth | 17K |
| Jun 22, 2026 | Duda Kenneth | 17K |
| Jun 4, 2026 | BECHTOLSHEIM ANDREAS | 158K |
| May 20, 2026 | Duda Kenneth | 79K |
| May 20, 2026 | TEMPLETON MARK B | 971 |
| May 20, 2026 | CHEW LEWIS | 971 |
| May 20, 2026 | Giancarlo Charles H | 971 |
| May 20, 2026 | Scheinman Daniel | 971 |
| May 20, 2026 | Ullal Jayshree | 42K |
| May 20, 2026 | Wassenaar Yvonne | 971 |
| May 20, 2026 | Battles Kelly Bodnar | 971 |
| May 20, 2026 | Breithaupt Chantelle Yvette | 18K |
| May 20, 2026 | Lavender Robert G | 807 |
| Apr 17, 2026 | Duda Kenneth | 32K |
| Mar 17, 2026 | Duda Kenneth | 32K |
| Feb 20, 2026 | Duda Kenneth | 196K |
| Feb 20, 2026 | TEMPLETON MARK B | 971 |
| Feb 20, 2026 | CHEW LEWIS | 971 |
| Feb 20, 2026 | Giancarlo Charles H | 971 |
| Feb 20, 2026 | Scheinman Daniel | 971 |
| Feb 20, 2026 | Ullal Jayshree | 336K |
| Feb 20, 2026 | Wassenaar Yvonne | 971 |
| Feb 20, 2026 | Battles Kelly Bodnar | 971 |
| Feb 20, 2026 | Breithaupt Chantelle Yvette | 63K |
| Feb 20, 2026 | Nightingale Todd | 15K |
| Feb 20, 2026 | Lavender Robert G | 808 |
| Jan 20, 2026 | Duda Kenneth | 30K |
| Dec 17, 2025 | Duda Kenneth | 30K |
| Nov 20, 2025 | Duda Kenneth | 83K |
| Nov 20, 2025 | TEMPLETON MARK B | 971 |
| Nov 20, 2025 | CHEW LEWIS | 971 |
| Nov 20, 2025 | Giancarlo Charles H | 971 |
| Nov 20, 2025 | Scheinman Daniel | 971 |
| Nov 20, 2025 | Ullal Jayshree | 72K |
| Nov 20, 2025 | Wassenaar Yvonne | 971 |
| Nov 20, 2025 | Battles Kelly Bodnar | 971 |
| Nov 20, 2025 | Breithaupt Chantelle Yvette | 16K |
| Nov 20, 2025 | Lavender Robert G | 807 |
| Nov 14, 2025 | Ullal Jayshree | 935K |
| Oct 17, 2025 | Duda Kenneth | 30K |
| Sep 17, 2025 | Duda Kenneth | 30K |
| Aug 20, 2025 | Duda Kenneth | 53K |
| Aug 20, 2025 | Wassenaar Yvonne | 1,971 |
| Aug 20, 2025 | TEMPLETON MARK B | 971 |
| Aug 20, 2025 | CHEW LEWIS | 971 |
| Aug 20, 2025 | Giancarlo Charles H | 971 |
| Aug 20, 2025 | Scheinman Daniel | 971 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so share counts reported before then are restated to today's basis here.
The chart, in numbers
| Flow | Shares |
|---|---|
| From holdings | 8.0M |
| Vested / exercised | 1.2M |
| Other in | 880K |
| Withheld for tax | 373K |
| Planned sales (10b5-1) | 7.9M |
| Gifts | 935K |
| Other out | 941K |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024, so share counts reported before then are restated to today's basis here.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| BECHTOLSHEIM ANDREAS | 354K | 0 | 0 |
| Duda Kenneth | 58K | 13K | 22.4 |
| Giancarlo Charles H | 195K | 1,509 | 0.8 |
| Scheinman Daniel | 150K | 159K | 106 |
Who holds what
the 14 largest holdings of 16| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| BECHTOLSHEIM ANDREAS Last trade Oct 30, 2026 | 10% owner | 181M | – | $625M | net selling over the year: 0 months buying, 6 months selling | Oct 30, 2026 |
| Ullal Jayshree CEO and Chairperson Last trade Oct 9, 2026 | CEO | 4.8M | – | $701M | net selling over the year: 0 months buying, 7 months selling | Oct 9, 2026 |
| Duda Kenneth President and CTO Last trade Oct 20, 2026 | Officer | 1.2M | – | $94M | net selling over the year: 0 months buying, 12 months selling | Oct 20, 2026 |
| Giancarlo Charles H Last trade Aug 3, 2026 | Director | 194K | – | $11M | net selling over the year: 0 months buying, 9 months selling | Aug 3, 2026 |
| Scheinman Daniel Last trade Jun 14, 2024 | Director | 159K | – | – | Jun 14, 2024 | |
| Nightingale Todd President and COO | COO | 123K | – | – | – | |
| Sadana Anshul SVP, Chief Operating Officer Last trade Aug 1, 2023 | COO | 71K | – | – | Aug 1, 2023 | |
| Breithaupt Chantelle Yvette Senior Vice President, CFO Last trade Oct 6, 2026 | CFO | 69K | – | $2.1M | net selling over the year: 0 months buying, 4 months selling | Oct 6, 2026 |
| TEMPLETON MARK B Last trade Nov 2, 2026 | Director | 66K | – | $2.8M | net selling over the year: 0 months buying, 3 months selling | Nov 2, 2026 |
| Taxay Marc SVP and General Counsel Last trade Mar 3, 2025 | Officer | 42K | – | – | Mar 3, 2025 | |
| Brennan Ita M Senior Vice President, CFO Last trade Dec 1, 2023 | CFO | 33K | – | – | Dec 1, 2023 | |
| CHEW LEWIS | Director | 32K | – | – | – | |
| McCool John F Chief Platform Officer Last trade Feb 26, 2025 | Officer | 14K | – | – | Feb 26, 2025 | |
| Battles Kelly Bodnar Last trade Aug 21, 2026 | Director | 11K | – | $244K | net selling over the year: 0 months buying, 4 months selling | Aug 21, 2026 |
Open-market trade log
the 60 most recent of 4,835| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Nov 2, 2026 | TEMPLETON MARK B (Director) 500 shares $168.85 −1.5% since trade filed Nov 4, 2026 | Planned sale (10b5-1) | 500 | $168.85 | $84K | −1.5% | Nov 4, 2026 |
| Nov 2, 2026 | TEMPLETON MARK B (Director) 900 shares $166.36 +0.0% since trade filed Nov 4, 2026 | Planned sale (10b5-1) | 900 | $166.36 | $150K | +0.0% | Nov 4, 2026 |
| Nov 2, 2026 | TEMPLETON MARK B (Director) 1,000 shares $167.41 −0.6% since trade filed Nov 4, 2026 | Planned sale (10b5-1) | 1,000 | $167.41 | $167K | −0.6% | Nov 4, 2026 |
| Nov 2, 2026 | TEMPLETON MARK B (Director) 1,200 shares $165.00 +0.8% since trade filed Nov 4, 2026 | Planned sale (10b5-1) | 1,200 | $165.00 | $198K | +0.8% | Nov 4, 2026 |
| Nov 2, 2026 | TEMPLETON MARK B (Director) 1,400 shares $164.07 +1.4% since trade filed Nov 4, 2026 | Planned sale (10b5-1) | 1,400 | $164.07 | $230K | +1.4% | Nov 4, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 2,435 shares $174.14 −4.5% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 2,435 | $174.14 | $424K | −4.5% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 12K shares $169.37 −1.8% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 12K | $169.37 | $2.0M | −1.8% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 14K shares $167.51 −0.7% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 14K | $167.51 | $2.3M | −0.7% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 27K shares $168.48 −1.3% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 27K | $168.48 | $4.6M | −1.3% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 29K shares $173.21 −4.0% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 29K | $173.21 | $5.0M | −4.0% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 38K shares $171.37 −2.9% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 38K | $171.37 | $6.6M | −2.9% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 54K shares $170.35 −2.3% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 54K | $170.35 | $9.2M | −2.3% | Nov 3, 2026 |
| Oct 30, 2026 | BECHTOLSHEIM ANDREAS (10% owner) 92K shares $172.46 −3.5% since trade filed Nov 3, 2026 | Planned sale (10b5-1) | 92K | $172.46 | $16M | −3.5% | Nov 3, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 116 shares $182.79 −9.0% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 116 | $182.79 | $21K | −9.0% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 185 shares $182.79 −9.0% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 185 | $182.79 | $34K | −9.0% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 200 shares $182.79 −9.0% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 200 | $182.79 | $37K | −9.0% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 281 shares $179.02 −7.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 281 | $179.02 | $50K | −7.1% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 374 shares $177.91 −6.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 374 | $177.91 | $67K | −6.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 449 shares $179.02 −7.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 449 | $179.02 | $80K | −7.1% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 486 shares $179.02 −7.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 486 | $179.02 | $87K | −7.1% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 599 shares $177.91 −6.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 599 | $177.91 | $107K | −6.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 649 shares $177.91 −6.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 649 | $177.91 | $115K | −6.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 2,041 shares $180.12 −7.6% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 2,041 | $180.12 | $368K | −7.6% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 3,265 shares $180.12 −7.6% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 3,265 | $180.12 | $588K | −7.6% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 3,446 shares $181.78 −8.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 3,446 | $181.78 | $626K | −8.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 3,538 shares $180.12 −7.6% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 3,538 | $180.12 | $637K | −7.6% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 3,742 shares $180.93 −8.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 3,742 | $180.93 | $677K | −8.1% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 5,514 shares $181.78 −8.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 5,514 | $181.78 | $1.0M | −8.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 5,973 shares $181.78 −8.5% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 5,973 | $181.78 | $1.1M | −8.5% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 5,988 shares $180.93 −8.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 5,988 | $180.93 | $1.1M | −8.1% | Oct 22, 2026 |
| Oct 20, 2026 | Duda Kenneth (Officer) 6,487 shares $180.93 −8.1% since trade filed Oct 22, 2026 | Planned sale (10b5-1) | 6,487 | $180.93 | $1.2M | −8.1% | Oct 22, 2026 |
| Oct 9, 2026 | Ullal Jayshree (CEO) 19K shares $217.10 −23.4% since trade filed Oct 13, 2026 | Planned sale (10b5-1) | 19K | $217.10 | $4.1M | −23.4% | Oct 13, 2026 |
| Oct 9, 2026 | Ullal Jayshree (CEO) 93K shares $217.10 −23.4% since trade filed Oct 13, 2026 | Planned sale (10b5-1) | 93K | $217.10 | $20M | −23.4% | Oct 13, 2026 |
| Oct 8, 2026 | Ullal Jayshree (CEO) 4,000 shares $217.05 −23.4% since trade filed Oct 13, 2026 | Planned sale (10b5-1) | 4,000 | $217.05 | $868K | −23.4% | Oct 13, 2026 |
| Oct 8, 2026 | Ullal Jayshree (CEO) 20K shares $217.05 −23.4% since trade filed Oct 13, 2026 | Planned sale (10b5-1) | 20K | $217.05 | $4.3M | −23.4% | Oct 13, 2026 |
| Oct 7, 2026 | Ullal Jayshree (CEO) 14K shares $217.14 −23.4% since trade filed Oct 9, 2026 | Planned sale (10b5-1) | 14K | $217.14 | $3.0M | −23.4% | Oct 9, 2026 |
| Oct 7, 2026 | Ullal Jayshree (CEO) 69K shares $217.14 −23.4% since trade filed Oct 9, 2026 | Planned sale (10b5-1) | 69K | $217.14 | $15M | −23.4% | Oct 9, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 781 shares $213.06 −21.9% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 781 | $213.06 | $166K | −21.9% | Oct 8, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 3,902 shares $213.06 −21.9% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 3,902 | $213.06 | $831K | −21.9% | Oct 8, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 13K shares $211.36 −21.3% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 13K | $211.36 | $2.8M | −21.3% | Oct 8, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 52K shares $212.27 −21.6% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 52K | $212.27 | $11M | −21.6% | Oct 8, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 66K shares $211.36 −21.3% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 66K | $211.36 | $14M | −21.3% | Oct 8, 2026 |
| Oct 6, 2026 | Ullal Jayshree (CEO) 259K shares $212.27 −21.6% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 259K | $212.27 | $55M | −21.6% | Oct 8, 2026 |
| Oct 6, 2026 | Breithaupt Chantelle Yvette (CFO) 1,224 shares $215.00 −22.6% since trade filed Oct 8, 2026 | Planned sale (10b5-1) | 1,224 | $215.00 | $263K | −22.6% | Oct 8, 2026 |
| Oct 1, 2026 | TEMPLETON MARK B (Director) 200 shares $206.03 −19.3% since trade filed Oct 5, 2026 | Planned sale (10b5-1) | 200 | $206.03 | $41K | −19.3% | Oct 5, 2026 |
| Oct 1, 2026 | TEMPLETON MARK B (Director) 500 shares $202.90 −18.0% since trade filed Oct 5, 2026 | Planned sale (10b5-1) | 500 | $202.90 | $101K | −18.0% | Oct 5, 2026 |
| Oct 1, 2026 | TEMPLETON MARK B (Director) 700 shares $201.62 −17.5% since trade filed Oct 5, 2026 | Planned sale (10b5-1) | 700 | $201.62 | $141K | −17.5% | Oct 5, 2026 |
| Oct 1, 2026 | TEMPLETON MARK B (Director) 1,800 shares $204.45 −18.6% since trade filed Oct 5, 2026 | Planned sale (10b5-1) | 1,800 | $204.45 | $368K | −18.6% | Oct 5, 2026 |
| Oct 1, 2026 | TEMPLETON MARK B (Director) 1,800 shares $205.58 −19.1% since trade filed Oct 5, 2026 | Planned sale (10b5-1) | 1,800 | $205.58 | $370K | −19.1% | Oct 5, 2026 |
| Sep 25, 2026 | Ullal Jayshree (CEO) 8,948 shares $211.40 −21.3% since trade filed Sep 29, 2026 | Planned sale (10b5-1) | 8,948 | $211.40 | $1.9M | −21.3% | Sep 29, 2026 |
| Sep 25, 2026 | Ullal Jayshree (CEO) 45K shares $211.40 −21.3% since trade filed Sep 29, 2026 | Planned sale (10b5-1) | 45K | $211.40 | $9.5M | −21.3% | Sep 29, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 854 shares $201.70 −17.5% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 854 | $201.70 | $172K | −17.5% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 1,269 shares $205.50 −19.0% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 1,269 | $205.50 | $261K | −19.0% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 1,366 shares $201.70 −17.5% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 1,366 | $201.70 | $276K | −17.5% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 1,480 shares $201.70 −17.5% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 1,480 | $201.70 | $299K | −17.5% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 1,558 shares $203.49 −18.3% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 1,558 | $203.49 | $317K | −18.3% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 2,031 shares $205.50 −19.0% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 2,031 | $205.50 | $417K | −19.0% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 2,038 shares $204.78 −18.8% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 2,038 | $204.78 | $417K | −18.8% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 2,200 shares $205.50 −19.0% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 2,200 | $205.50 | $452K | −19.0% | Sep 23, 2026 |
| Sep 21, 2026 | Duda Kenneth (Officer) 2,492 shares $203.49 −18.3% since trade filed Sep 23, 2026 | Planned sale (10b5-1) | 2,492 | $203.49 | $507K | −18.3% | Sep 23, 2026 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles. The share count changed 4-for-1 on Nov 18, 2021 and 4-for-1 on Dec 6, 2024. This table prints prices and share counts as they were filed, on the basis of the day, while the charts above are on today's; “Since trade” puts the filed price on today's basis first, which is why it does not divide into the price beside it.
Filing hygiene
427 Forms 4, 3 years
0 filed late
2 amendments
2 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.