Funds · 13F filer · New York, NY

13D Management LLC

$71.3M in 11 U.S. stocks and ETFs at the end of June 30, 2026, as reported to the SEC.1

1y return+44.2%S&P 500 +20.9%
3y return+54.1%S&P 500 +68.5%
5y return+34.7%S&P 500 +74.5%
10y return+201.7%S&P 500 +256.5%

These returns are for its stock picks as disclosed on Form 13F: last quarter's holdings, valued at this quarter's prices. They miss trades within each quarter, short positions, options, bonds, cash and fees, so they aren't the returns its clients got.

$100 invested in its stock picks

Since June 30, 2016: $302 against $357 in the S&P 500.2

13D Management LLCS&P 500 (SPY)
$100$35720162026

Top holdings

At the end of June 30, 2026. Change is in shares since the quarter before.2

StockValueShare of portfolioChange
VSATViasat Inc$11.3M15.9%−23.4%
TWLOTwilio Inc$8.0M11.3%−35.8%
MRCYMercury Sys Inc$7.4M10.4%
PSOPearson PLC$7.3M10.2%
ALVAutoliv Inc$6.5M9.1%
CRLCharles Riv Labs Intl Inc$5.9M8.2%
SNPSSynopsys Inc$5.6M7.9%New
EXELExelixis Inc$5.5M7.7%
ETSYEtsy Inc$5.4M7.6%
ITGRInteger Hldgs Corp$4.4M6.2%
FUNSix Flags Entertainment Corp$4.0M5.6%

Best picks still held

How each current holding has done since the quarter it first appeared in its filings (up to six years back).

StockHeld sinceReturn sinceNow worth
TWLOTwilio IncJune 30, 2024+263.2%$8.0M
MRCYMercury Sys IncSeptember 30, 2023+229.8%$7.4M
VSATViasat IncSeptember 30, 2025+206.5%$11.3M
EXELExelixis IncJune 30, 2023+184.7%$5.5M
PSOPearson PLCJune 30, 2020+119.8%$7.3M
ALVAutoliv IncJune 30, 2020+80.1%$6.5M
CRLCharles Riv Labs Intl IncJune 30, 2025+49.5%$5.9M
FUNSix Flags Entertainment CorpDecember 31, 2025+38.9%$4.0M
ITGRInteger Hldgs CorpDecember 31, 2025+19.2%$4.4M
ETSYEtsy IncMarch 31, 2024+9.6%$5.4M

Sold off last quarter

  • ACHCAcadia Healthcare Company In was $6.9M
  • TRIPTripadvisor Inc was $3.2M
  • WKWorkiva Inc was $3.1M

Quarter by quarter

QuarterIts picksS&P 500
June 30, 2026+37.9%+14.8%
March 31, 2026−4.4%−4.6%
December 31, 2025+2.1%+2.4%
September 30, 2025+7.1%+7.8%
June 30, 2025+4.7%+10.5%
March 31, 2025−10.3%−4.6%
December 31, 2024+0.3%+2.1%
September 30, 2024+8.1%+5.4%
June 30, 2024−7.2%+4.0%
March 31, 2024+8.0%+10.0%
December 31, 2023+13.7%+11.2%
September 30, 2023−7.8%−3.6%
June 30, 2023+0.4%+8.3%
March 31, 2023+4.2%+7.0%
December 31, 2022+11.2%+7.1%
September 30, 2022−13.0%−5.3%
June 30, 2022−13.4%−16.5%
March 31, 2022−1.1%−4.9%
December 31, 2021+2.7%+10.7%
September 30, 2021−1.8%+0.3%

Sources

Every number on this page points here. Each one links to the public record.

  1. 1
    CIK 1600133
  2. 2
    Filed August 14, 2026 · accession 0001172661-26-003515