13D Management LLC

ContrarianQuality / disciplined sizingSector-focused

Total reported value

$64.5M

Reporting period: 2026-03-31 · Number of holdings: 13

13D Management LLC disclosed 13 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $64.5M and a quarterly turnover rate of 48.9%.

Personality snowflake

Concentration: 33.87
Portfolio Stability: 48.86
Momentum/Contrarian: 0
Sector conviction: 90.11
Diversification: 26
Sizing Uniformity: 96.69

Recent moves

Add VSAT
-18.3%　$593.2K
Trim MRCY
-41.7%　-$3.2M
Add ITGR
0.0%　$449.8K
Add FUN
0.0%　$449.5K
Add PSO
0.0%　-$417.1K
Add TWLO
0.0%　-$997.6K

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#	Ticker	Issuer	Asset Subclass	Weight	Weight Change	Shares Change
1	TWLO	Twilio INC - A	Stock-Tech	11.85%	+1.57%	—
2	VSAT	Viasat INC	Stock-Tech	11.70%	+3.43%	-18.34%
3	ACHC	Acadia Healthcare Co INC	Stock-Other	10.66%	+10.66%	NEW
4	PSO	Pearson Plc-sponsored Adr	Stock-Other	9.33%	+1.67%	—
5	ALV	Autoliv INC	Stock-Consumer Disc	9.10%	+1.21%	—
6	CRL	Charles River Laboratories	Stock-Healthcare	6.90%	+0.25%	-7.86%
7	MRCY	Mercury Systems INC	Stock-Industrials	6.83%	-2.18%	-41.73%
8	EXEL	Exelixis INC	Stock-Healthcare	6.74%	+0.46%	-15.79%
9	ITGR	Integer Holdings CORP	Stock-Healthcare	6.41%	+2.02%	—
10	ETSY	Etsy INC	Stock-Consumer Disc	5.57%	+0.83%	—
11	FUN	Six Flags Entertainment CORP	Stock-Other	5.13%	+1.73%	—
12	TRIP	Tripadvisor INC	Stock-Other	4.96%	-0.24%	—
13	WK	Workiva INC	Stock-Tech	4.81%	-0.53%	—

Reported value over time

Sector allocation

Sector allocation over time

Quarterly history

Period	Holdings	Total value	Stability	Top holdings
2026-03-31	13	$64.5M	49	1TWLO 2VSAT 3ACHC Top holdings2026-03-31 1.TWLO 2.VSAT 3.ACHC 4.PSO 5.ALV 6.CRL 7.MRCY 8.EXEL 9.ITGR 10.ETSY
2025-12-31	16	$84.0M	63	1TWLO 2MRCY 3VSAT Top holdings2025-12-31 1.TWLO 2.MRCY 3.VSAT 4.ALV 5.PSO 6.CRL 7.EXEL 8.SWX 9.BILL 10.WK
2025-09-30	18	$104.3M	75	1MRCY 2QRVO 3VSAT Top holdings2025-09-30 1.MRCY 2.QRVO 3.VSAT 4.ALV 5.PSO 6.TWLO 7.JHG 8.ABG 9.ETSY 10.SWX
2025-06-30	20	$109.6M	0	1TWLO 2QRVO 3MRCY Top holdings2025-06-30 1.TWLO 2.QRVO 3.MRCY 4.SWX 5.PSO 6.APD 7.ABG 8.EXEL 9.ALV 10.JHG
2025-03-31	42	$113.4M	100	1MRCY 2PSO 3NSIT Top holdings2025-03-31 1.MRCY 2.PSO 3.NSIT 4.APD 5.SWX 6.ABG 7.TWLO 8.VSTS 9.YETI 10.EXEL
2024-12-31	42	$135.0M	0	1TWLO 2VSTS 3SWX Top holdings2024-12-31 1.TWLO 2.VSTS 3.SWX 4.MRCY 5.PSO 6.NSIT 7.EXEL 8.ABG 9.JHG 10.LW
2024-09-30	43	$136.4M	0	1FYBR 2NSIT 3SWX Top holdings2024-09-30 1.FYBR 2.NSIT 3.SWX 4.EXEL 5.MDU 6.VSTS 7.ABG 8.JHG 9.PSO 10.TWLO
2024-06-30	42	$137.1M	0	1NSIT 2FYBR 3SWX Top holdings2024-06-30 1.NSIT 2.FYBR 3.SWX 4.EXEL 5.TWLO 6.MDU 7.ETSY 8.ABG 9.VSTS 10.AZTA
2024-03-31	56	$163.8M	0	1GDDY 2SWX 3NSIT Top holdings2024-03-31 1.GDDY 2.SWX 3.NSIT 4.FYBR 5.ELAN 6.EXEL 7.AZTA 8.USFD 9.MDU 10.THS
2023-12-31	58	$169.9M	0	1FRPT 2FYBR 3NSIT Top holdings2023-12-31 1.FRPT 2.FYBR 3.NSIT 4.GDDY 5.EXEL 6.WIX 7.SWX 8.AZTA 9.THS 10.CTLTEUR
2023-09-30	56	$160.7M	0	1THS 2CCK 3NSIT Top holdings2023-09-30 1.THS 2.CCK 3.NSIT 4.EXEL 5.FRPT 6.MDU 7.WIX 8.GDDY 9.PSO 10.USFD
2023-06-30	56	$183.3M	0	1ARMK 2THS 3NSIT Top holdings2023-06-30 1.ARMK 2.THS 3.NSIT 4.DLTR 5.FRPT 6.CCK 7.ALKS 8.SWX 9.EXEL 10.JHG
2023-03-31	54	$196.9M	0	1HWM 2THS 3DLTR Top holdings2023-03-31 1.HWM 2.THS 3.DLTR 4.NSIT 5.FRPT 6.ARMK 7.CCK 8.MDU 9.ALKS 10.SWX
2022-12-31	56	$190.1M	0	1HWM 2THS 3ARMK Top holdings2022-12-31 1.HWM 2.THS 3.ARMK 4.DLTR 5.ALKS 6.GDDY 7.PSO 8.MRCY 9.SWX 10.WIX
2022-09-30	62	$191.1M	0	1DLTR 2HWM 3THS Top holdings2022-09-30 1.DLTR 2.HWM 3.THS 4.OLN 5.ARMK 6.ALKS 7.EVAUSD 8.SWX 9.GDDY 10.MRCY
2022-06-30	60	$226.1M	0	1MRCY 2DLTR 3ALKS Top holdings2022-06-30 1.MRCY 2.DLTR 3.ALKS 4.HWM 5.OLN 6.THS 7.ARMK 8.EVH 9.EVAUSD 10.GDDY
2022-03-31	66	$262.9M	0	1DLTR 2MRCY 3HWM Top holdings2022-03-31 1.DLTR 2.MRCY 3.HWM 4.OLN 5.HHC* 6.LPSNUSD 7.EVAUSD 8.ARMK 9.ALKS 10.GDDY
2021-12-31	58	$260.8M	0	1PZZA 2LNG 3OLN Top holdings2021-12-31 1.PZZA 2.LNG 3.OLN 4.EVH 5.HHC* 6.LKQ 7.ARMK 8.HWM 9.EVAUSD 10.THS
2021-09-30	62	$268.7M	0	1EVH 2PZZA 3LNG Top holdings2021-09-30 1.EVH 2.PZZA 3.LNG 4.ALKS 5.OLN 6.ELAN 7.HWM 8.LKQ 9.GCPEUR 10.MMSI
2021-06-30	62	$290.7M	96	1HWM 2LNG 3ELAN Top holdings2021-06-30 1.HWM 2.LNG 3.ELAN 4.BOX 5.PZZA 6.HHC* 7.PSTHUSD 8.OLN 9.ARMK 10.ALKS
2021-03-31	60	$270.0M	37	1BOX 2LNG 3HWM Top holdings2021-03-31 1.BOX 2.LNG 3.HWM 4.OLN 5.GCPEUR 6.PZZA 7.SLM 8.EVH 9.MFS1EUR 10.NWL
2020-12-31	62	$241.9M	26	1PRSP 2LNG 3HWM Top holdings2020-12-31 1.PRSP 2.LNG 3.HWM 4.TRN 5.GCPEUR 6.PZZA 7.NWL 8.OLN 9.HAIN 10.ACIW
2020-09-30	62	$227.1M	44	1LNG 2HAIN 3PZZA Top holdings2020-09-30 1.LNG 2.HAIN 3.PZZA 4.NWL 5.GDOT 6.ERIC 7.BOX 8.STX 9.MGLNUSD 10.SLM
2020-06-30	60	$229.9M	28	1PZZA 2TRN 3ERIC Top holdings2020-06-30 1.PZZA 2.TRN 3.ERIC 4.LNG 5.BOX 6.CALY 7.GEN 8.HAIN 9.ABBNY 10.NWL
2020-03-31	54	$205.8M	64	1ERIC 2BOX 3STX Top holdings2020-03-31 1.ERIC 2.BOX 3.STX 4.GEN 5.PZZA 6.ABBNY 7.TRN 8.GDOT 9.MED 10.LNG
2019-12-31	54	$329.4M	66	1CMG 2GEN 3MED Top holdings2019-12-31 1.CMG 2.GEN 3.MED 4.FSCTEUR 5.PZZA 6.LNG 7.TRN 8.ERIC 9.BOX 10.STX
2019-09-30	23	$304.3M	50	1CMG 2LNG 3PZZA Top holdings2019-09-30 1.CMG 2.LNG 3.PZZA 4.SYMCEUR 5.ARMK 6.ERIC 7.ARNCCHF 8.STX 9.CALY 10.ABBNY
2019-06-30	27	$331.8M	35	1SYMCEUR 2CMG 3LNG Top holdings2019-06-30 1.SYMCEUR 2.CMG 3.LNG 4.ERIC 5.PZZA 6.ARNCCHF 7.G6518L 8.GCPEUR 9.SLM 10.ABBNY
2019-03-31	28	$337.7M	62	1CMG 2LNG 3SYMCEUR Top holdings2019-03-31 1.CMG 2.LNG 3.SYMCEUR 4.ERIC 5.G6518L 6.PZZA 7.CZREUR 8.MFS1EUR 9.TEX 10.JACK
2018-12-31	30	$309.3M	49	1M513632LNG 3ERIC Top holdings2018-12-31 1.M51363 2.LNG 3.ERIC 4.SYMCEUR 5.G6518L 6.BAX 7.ARNCCHF 8.MRVL 9.CMG 10.JACK
2018-09-30	30	$362.9M	41	1LNG2G6518L3TRN Top holdings2018-09-30 1.LNG 2.G6518L 3.TRN 4.ERIC 5.HHC* 6.BAX 7.AKAM 8.CMG 9.M51363 10.AWI
2018-06-30	36	$392.1M	32	1LNG 2HHC3M51363 Top holdings2018-06-30 1.LNG 2.HHC 3.M51363 4.TRN 5.MRVL 6.BAX 7.AKAM 8.345605 9.ERIC 10.ADP
2018-03-31	32	$360.5M	36	1MRVL2M513633HHC* Top holdings2018-03-31 1.MRVL 2.M51363 3.HHC* 4.MD 5.LNG 6.STX 7.TRN 8.BLMN 9.AKAM 10.BAX
2017-12-31	34	$335.5M	49	1MRVL 2HHC3BAX Top holdings2017-12-31 1.MRVL 2.HHC 3.BAX 4.LNG 5.AWI 6.HAIN 7.NXPI 8.STX 9.M51363 10.ABBNY
2017-09-30	29	$263.1M	51	1MRVL 2BAX 3HHC* Top holdings2017-09-30 1.MRVL 2.BAX 3.HHC* 4.TEX 5.NXPI 6.LNG 7.AWI 8.DECK 9.MFS1EUR 10.37518B
2017-06-30	35	$282.3M	23	1MRVL 2BCO300762W Top holdings2017-06-30 1.MRVL 2.BCO 3.00762W 4.HHC* 5.BAX 6.LNG 7.45321L 8.DECK 9.TEX 10.ABBNY
2017-03-31	33	$254.8M	35	1MRVL 2BCO 3HHC* Top holdings2017-03-31 1.MRVL 2.BCO 3.HHC* 4.00762W 5.LNG 6.BAX 7.MDLZ 8.ABBNY 9.BFH 10.45321L
2016-12-31	32	$244.0M	37	1MRVL 2HDSUSD 3BCO Top holdings2016-12-31 1.MRVL 2.HDSUSD 3.BCO 4.HHC* 5.MDLZ 6.698354 7.APD 8.BAX 9.45321L 10.BFH
2016-09-30	33	$239.9M	53	1MRVL2126804345321L Top holdings2016-09-30 1.MRVL 2.126804 3.45321L 4.HHC* 5.53224V 6.BCO 7.APD 8.MDLZ 9.563568 10.BAX
2016-06-30	30	$243.2M	29	1HHC21268043ZTS Top holdings2016-06-30 1.HHC 2.126804 3.ZTS 4.563568 5.MRVL 6.13645T 7.APD 8.BAX 9.BCO 10.CAG
2016-03-31	28	$221.4M	69	1MRVL21268043HHC* Top holdings2016-03-31 1.MRVL 2.126804 3.HHC* 4.ZTS 5.13645T 6.APD 7.BCO 8.FNF 9.563568 10.74733T
2015-12-31	34	$328.0M	85	1HHC2CBRE 3DRI Top holdings2015-12-31 1.HHC 2.CBRE 3.DRI 4.ZTS 5.FNF 6.13645T 7.IPG 8.APD 9.ALSN 10.BCO
2015-09-30	25	$375.5M	74	1DRI 2CBRE 3FNF Top holdings2015-09-30 1.DRI 2.CBRE 3.FNF 4.AWI 5.ZTS 6.VALE 7.ALSN 8.APD 9.IPG 10.MDLZ
2015-06-30	33	$444.1M	41	1HHC2CBRE 3DRI Top holdings2015-06-30 1.HHC 2.CBRE 3.DRI 4.HO1 5.JNP 6.13645T 7.FNF 8.ZTS 9.VALE 10.AWI
2015-03-31	29	$393.2M	48	1HHC213645T3CBRE Top holdings2015-03-31 1.HHC 2.13645T 3.CBRE 4.ASH 5.DRI 6.AWI 7.MSI 8.FNF 9.HO1 10.JNP
2014-12-31	32	$362.2M	50	1CBRL 2HHC313645T Top holdings2014-12-31 1.CBRL 2.HHC 3.13645T 4.88164L 5.ASH 6.CBRE 7.MSI 8.FNF 9.JNP 10.DRI
2014-09-30	34	$320.9M	55	1HHC213645T3CBRL Top holdings2014-09-30 1.HHC 2.13645T 3.CBRL 4.UNTEUR 5.88164L 6.MSI 7.ASH 8.CBRE 9.768573 10.CHKEUR
2014-06-30	36	$274.3M	52	1HHC213645T3UNTEUR Top holdings2014-06-30 1.HHC 2.13645T 3.UNTEUR 4.CBRL 5.CHKEUR 6.MSI 7.CBRE 8.ASH 9.583334 10.CACI
2014-03-31	37	$218.0M	68	1HHC2VALE 3UNTEUR Top holdings2014-03-31 1.HHC 2.VALE 3.UNTEUR 4.CBRL 5.LEA 6.13645T 7.CHKEUR 8.MSI 9.CACI 10.ASH
2013-12-31	38	$134.8M	0	1VALE 2HHC3CBRL Top holdings2013-12-31 1.VALE 2.HHC 3.CBRL 4.LEA 5.345838 6.13645T 7.CHKEUR 8.MSI 9.BEAM 10.BID

Holding changes this quarter

13D Management LLC's most significant position changes for 2026-03-31: New buy: Acadia Healthcare Co INC (ACHC); Sold out: Southwest Gas Holdings INC (SWX); Sold out: Bill Holdings INC (BILL); Sold out: Wex INC (WEX); Sold out: Lamb Weston Holdings INC (LW).

Position changes disclosed by 13D Management LLC for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#	Ticker	Issuer	Weight Change	Shares Change	Action
1	VSAT	Viasat INC	+3.4%	-18.34%	Trim
2	ITGR	Integer Holdings CORP	+2%	—	Unchanged
3	FUN	Six Flags Entertainment CORP	+1.7%	—	Unchanged
4	PSO	Pearson Plc-sponsored Adr	+1.7%	—	Unchanged
5	TWLO	Twilio INC - A	+1.6%	—	Unchanged
6	ALV	Autoliv INC	+1.2%	—	Unchanged
7	ETSY	Etsy INC	+0.8%	—	Unchanged
8	EXEL	Exelixis INC	+0.5%	-15.79%	Trim
9	CRL	Charles River Laboratories	+0.3%	-7.86%	Trim
10	TRIP	Tripadvisor INC	-0.2%	—	Unchanged
11	WK	Workiva INC	-0.5%	—	Unchanged
12	MRCY	Mercury Systems INC	-2.2%	-41.73%	Trim
13	ACHC	Acadia Healthcare Co INC	—	NEW	New buy
14	SWX	Southwest Gas Holdings INC	—	EXIT	Sold out
15	BILL	Bill Holdings INC	—	EXIT	Sold out
16	WEX	Wex INC	—	EXIT	Sold out
17	LW	Lamb Weston Holdings INC	—	EXIT	Sold out

FAQ

What is 13D Management LLC and what type of investor is it?

13D Management LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $64.5M, spread across 13 disclosed positions.

What are 13D Management LLC's largest equity positions?

Based on the latest 13F filing, 13D Management LLC's top holdings by market value are: 1. Twilio INC - A (TWLO) — $7.6M (11.8%) 2. Viasat INC (VSAT) — $7.5M (11.7%) 3. Acadia Healthcare Co INC (ACHC) — $6.9M (10.7%) 4. Pearson Plc-sponsored Adr (PSO) — $6.0M (9.3%) 5. Autoliv INC (ALV) — $5.9M (9.1%)

What changes did 13D Management LLC make in its most recent portfolio filing?

In the latest reported quarter, 13D Management LLC made 9 notable position adjustments: 1 new positions were initiated, 0 existing holdings were added to, 4 positions were partially reduced, and 4 were completely exited. The largest of these moves: New buy: Acadia Healthcare Co INC (ACHC); Sold out: Southwest Gas Holdings INC (SWX); Sold out: Bill Holdings INC (BILL); Sold out: Wex INC (WEX); Sold out: Lamb Weston Holdings INC (LW)

What sectors does 13D Management LLC focus on?

13D Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio: • Information Technology: 40.6% • Health Care: 28.7% • Consumer Discretionary: 21.0% • Industrials: 9.8%