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EdgarHawk

SUMMIT PARTNERS L P

10% Owner

10% Owner
18 filings analyzed · 2 companies · Latest 2025-09-10

Companies

Company Buys Sells Direction
Klaviyo, Inc. KVYO 0 34 Net selling
LifeStance Health Group, Inc. LFST 0 1 Net selling

Activity

September 2025
2025-09-10 Klaviyo, Inc. KVYO
high
Sell
4,000,000 shares
$127,480,000
Significance 7/10

Summit Partners L P sells 4,000,000 shares of KVYO at $31.87; position reduced 100%, exits stake entirely.

Summit Partners L P, a 10% owner, sold 4,000,000 shares on 2025-09-08 at $31.87, valued at $127,480,000.00, reducing their holdings to zero. The company remains unprofitable (net income $-24,281,000.00 in the latest quarter) despite strong revenue growth of +34.3% year-over-year, creating a tension between growth momentum and financial performance. Of the insider's three measurable prior sales at KVYO with 90-day outcomes, two were well-timed (the stock declined after), but this current trade at $31.87 sits -36.6% below the 52-week high of $49.19, suggesting the insider is exiting at a significantly depressed valuation relative to recent history. The timing and scale of this full divestiture by a major shareholder warrants close investor attention, particularly given the unprofitable status of an otherwise high-growth company.

August 2025
2025-08-27 Klaviyo, Inc. KVYO
high
Sell
975,000 shares
$29,259,750
Significance 6/10

10% owner Summit Partners sells 975,000 KVYO shares at $30.01; current price $32.08, down 34.8% from 52-week high

Summit Partners sold 975,000 shares for $29,259,750.00 on 2025-08-25 at $30.01 per share, following a prior sale of shares on 2025-08-13 at the same ticker. The sale occurs as Klaviyo trades $32.08 currently but is down 34.8% from its 52-week high of $49.19 and down 5.3% over 30 days. At the same-ticker level, prior sells have shown mixed timing: 2 of 3 prior sales with measurable 90-day outcomes were well-timed (stock fell after), though the most recent prior sale on 2024-12-09 was poorly timed with a +5.0% 30-day return followed by a -13.0% 90-day return. Klaviyo remains unprofitable (net income of $-24,281,000.00 in the latest quarter) despite strong annual revenue growth of +34.3%, creating a divergence between top-line momentum and bottom-line profitability that may warrant investor attention as the company navigates the path to positive earnings.

medium
Sell
8,407,643 shares
$42,626,750
Significance 6/10

Summit Partners L P sold 8,407,643 shares (8.41M) of LFST at $5.07 on 2025-08-18, reducing stake by 20.1% to 33,524,715 shares remaining.

Summit Partners L P, a 10% owner, executed a substantial open-market sale of 8,407,643 shares at $5.07, representing a -20.1% reduction in holdings and valued at $42,626,750.01. The sale occurred at a price 5.2% below the current market price of $5.35 and 38.0% below the 52-week high of $8.17, reflecting the stock's sharp downward trajectory over the past 90 days (-5.0%). LifeStance Health remains unprofitable on a full-year basis (net income $-3,791,000.00 in the latest quarter) despite quarterly revenue of $345,311,000.00 and annual growth of 18.5%, creating a mismatch between growth and profitability that may inform large-holder strategic repositioning. The timing context is mixed: across all tickers, Summit's 18 prior sells averaged a 90-day well-timed rate of 18.75%, but at LFST specifically, its single prior sale on 2024-05-24 was poorly timed (90d return +2.2%), and this current sale comes during a period of modest 30-day recovery (+28.3%) following a broader 90-day decline, which offers limited clarity on forward-price expectations.

2025-08-15 Klaviyo, Inc. KVYO
high
Sell
6,500,000 shares
$195,065,000
Significance 7/10

Summit Partners L.P. sells 6,500,000 KVYO shares at $30.01; stock down -36.1% from 52-week high, but insider's cross-ticker 90-day sale timing 13.33% well-timed.

Summit Partners L.P., a 10% owner, sold 6,500,000 shares (6.50M shares) at $30.01 on 2025-08-13 for $195,065,000.00, reducing holdings by -92.9% to 500,000 shares post-transaction. The stock is trading -36.1% from its 52-week high of $49.19 and down -10.7% over 90 days, suggesting a deteriorating investment backdrop since the transaction. However, the insider's cross-ticker track record shows a 90-day well-timed rate of 13.33% across 17 prior sales, indicating modest historical accuracy in selling before declines. At the same-ticker level, only 1 of 3 measurable prior KVYO sales achieved negative 90-day returns, signaling weaker timing consistency specific to this company. The sale occurs amid company unprofitability ($-24.3M net income in the latest quarter) despite strong revenue growth of +34.3% year-over-year, creating a tension between expansion and near-term losses that may have factored into the exit.

June 2025
2025-06-05 Klaviyo, Inc. KVYO
high
Sell
4,000,000 shares
$133,400,000
Significance 7/10

Summit Partners L P sells 4,000,000 shares of KVYO at $33.35; 0 shares remain post-transaction (converts to open market sale from derivative position).

Summit Partners L P, a 10% owner, sold 4,000,000 shares at $33.35 on 2025-06-04 for $133,400,000.00, reducing its common shareholding to zero via a derivative-conversion transaction. The sale occurred at a price 31.0% below the 52-week high of $49.19, and the stock has risen 7.4% over the past 30 days since the transaction. The company generated $279,827,000.00 in revenue last quarter but reported a net loss of $14,089,000.00; full-year profitability remains negative despite 34.3% annual revenue growth. At the KVYO-specific level, Summit's prior three completed-measurement sells (2024-12-09, 2024-11-14, 2024-09-13) showed mixed post-sale performance—two gained ground (30d +5.0% and +7.9%, 90d +31.1%) while one declined over 90 days (−13.0%)—with only 1 of 3 prior KVYO sells meeting the well-timed threshold at 90 days. Because the insider held derivative securities that converted into common shares in this transaction, the post-transaction common position of zero does not represent a full exit from economic exposure—the investor's real position lives in derivative holdings not yet populated in the database.

May 2025
2025-05-20 Klaviyo, Inc. KVYO
high
Sell
4,000,000 shares
$132,000,000
Significance 7/10

Summit Partners sold 4.00M KVYO shares at $33.00 on 2025-05-19, reducing stake from 4.00M to 0 shares. $132.0M transaction.

Summit Partners, a 10% owner, sold 4,000,000 shares at $33.00 on 2025-05-19 for a total value of $132,000,000.00. This transaction involves a derivative-conversion; the insider's actual position lives in Form 4 Table II (derivative securities), which is not yet populated, so this should not be characterized as a complete position exit. At the current price of $34.01, the stock has risen 30.9% since the sale was executed 30 days ago. Across his prior five sales at KVYO, the insider's track record shows mixed timing: only 1 of 4 prior sales with measurable 90-day outcomes were well-timed (negative post-sale returns), while the most recent sale on 2025-03-14 declined 16.5% over 30 days—an instance of better timing. The company remains unprofitable, with the most recent quarter showing net income of $-14,089,000.00 against revenue of $279,827,000.00, though annual revenue growth stands at +34.3%. Given the substantial scale of the transaction and the mixed track record of timing at this ticker, investors should monitor whether Table II derivative holdings indicate a true change in insider conviction.

March 2025
2025-03-17 Klaviyo, Inc. KVYO
high
Sell
2,000,000 shares
$64,880,000
Significance 6/10

Summit Partners (10% owner) sells 2,000,000 shares of KVYO at $32.44 for $64.9M; stock down 28% in 30d, -31.2% from 52wk high.

Summit Partners sold 2,000,000 shares at $32.44 on 2025-03-14 as part of a derivative conversion transaction, converting its holdings to another form rather than a complete exit. The sale occurs amid significant recent price weakness: the stock has declined 28.0% over the past 30 days and sits 31.2% below its 52-week high of $49.19. In timing context, Summit's prior five trades at KVYO show a poor track record: only 1 of 5 prior sells were well-timed at the 90-day mark, with recent results including +5.0% (Dec sell), +7.9% (Nov sell), +17.6% (Sep sell), +18.1% (Sep sell), and +9.1% (Aug sell)—meaning the stock rose after most of these sales. The company remains unprofitable with $-1.3M in net income on $235.1M quarterly revenue, though full-year revenue growth stands at +34.3%. The combination of sharp recent declines and this institutional holder's conversion activity warrants monitoring as a signal of potential portfolio realignment during a period of significant downside momentum.

December 2024
2024-12-11 Klaviyo, Inc. KVYO
high
Sell
2,100,000 shares
$82,215,000
Significance 6/10

Summit Partners L.P. converts and sells 2,100,000 shares of KVYO at $39.15 for $82,215,000.00; derivative position transition flagged.

Summit Partners L.P., a 10% owner, converted and sold 2,100,000 shares at $39.15 on 2024-12-09, eliminating its enumerated common stock position (Table I), though derivative holdings may persist in Table II. The sale occurs near the 52-week high of $40.41, within a context where the stock has risen 12.3% over 30 days and 25.2% over 90 days, following strong revenue growth of 47.7% year-over-year. However, the company remains unprofitable with net income of $-1,345,000.00 in the latest quarter, and the insider's prior transactions at KVYO—including three measurable 90-day outcomes—show no well-timed selling pattern (all three posted positive 90-day returns, meaning the stock rose after each prior sale). The conversion structure and existing derivative securities require deeper review to assess the true scope and intent of this transaction.

November 2024
2024-11-18 Klaviyo, Inc. KVYO
high
Sell
3,153,293 shares
$114,149,207
Significance 6/10

SUMMIT PARTNERS L P sells 3,153,293 shares (90.1% of holdings) at $36.20, reducing stake to 346,707 shares; derivative conversion flag present.

SUMMIT PARTNERS L P divested 3,153,293 shares of Klaviyo (KVYO) at $36.20 on 2024-11-14, reducing its holdings from 3,500,000 shares to 346,707 shares. The transaction generated $114,149,206.60 and represents a 90.1% reduction of pre-transaction holdings. This is a derivative-conversion transaction (Form 4 Table II status unknown in this database), meaning the insider may retain economic exposure through derivative securities not yet visible in available data; the trade should be read as a partial sale of a specific batch rather than a full exit. The stock currently trades at $34.78, approximately 4.1% below the sale price, and KVYO remains unprofitable (negative net income of $-1,345,000 in the latest quarter despite 47.7% annual revenue growth). In same-ticker history, SUMMIT's five prior sales at KVYO (Aug 23–Sept 13, 2024) all showed positive 30-day returns ranging from 5.3% to 18.1%, suggesting the stock has continued rising after prior sales rather than confirming prescient timing; however, 90-day outcomes remain unmeasurable for those trades. The cross-ticker track record shows a 20.00% well-timed sell rate overall (lower than typical), indicating inconsistent predictive accuracy on timing across all holdings.

September 2024
2024-09-17 Klaviyo, Inc. KVYO
high
Sell
113,561 shares
$3,573,765
Significance 6/10

Summit Partners L P sold 113.6K KVYO shares for $3.6M; 10% owner exits position entirely via conversion

Summit Partners L P, a 10% shareholder, sold 113,561 shares at $31.47 on 2024-09-13, reducing holdings from 113,561 shares to 0 post-transaction. This appears to be a derivative conversion event rather than a discretionary open-market sale—the FLAG notation indicates the insider's real position lives in Form 4 Table II (derivative securities), not yet populated in the database, so the zero post-transaction share count does not represent a complete fundamental exit. The sale occurred at a price 6.5% below the current $33.64 level and within the 52-week range. Notably, Summit Partners executed five consecutive sales at KVYO between 2024-08-22 and 2024-09-13, all outcomes still unmeasurable at 90 days, with no measurable well-timed sells in same-ticker history. The company reported $222.2M in latest quarterly revenue with +47.7% annual growth, but remains unprofitable ($-4.9M net income), warranting monitoring of whether the systematic selling pattern reflects fundamental or liquidity-related positioning.

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