Which funds own STX
Seagate Technology Hldngs PL in the Q2 2026 filings. At least 38 of the 91 current managers on file reported a position, worth $40.1bn between them. At least a fifth of the current managers on file hold it, which is a crowd without being the whole market. The quarter went one way: 28 managers opened or added against 11 cutting.
- Managers holding
- 38
- at least, of 91 current
- Combined value
- $40.1bn
- as reported
- Opened
- 8
- new this quarter
- Added to
- 20
- already held
- Trimmed or sold out
- 11
- 1 sold out entirely
Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.
Managers reporting a position
Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.
| Manager | Value | Weight | Shares | Change on the quarter | Action |
|---|---|---|---|---|---|
| Fidelity (FMR LLC) Long-only · $2304bn book | $7.9bn | 0.3% | 8,153,134 | +$4.7bn-23,784 | Trimmed |
| Invesco Ltd Long-only · $1264bn book | $7.3bn | 0.6% | 7,536,880 | +$4.5bn+360,182 | Added |
| Capital Research Global Investors Long-only · $717bn book | $4.2bn | 0.6% | 4,326,781 | +$1.9bn-1,409,289 | Trimmed |
| MFS Investment Management Long-only · $315bn book | $2.5bn | 0.8% | 2,560,276 | +$1.5bn+24,154 | Added |
| Wellington Management Group LLP Long-only · $580bn book | $2.3bn | 0.4% | 2,414,136 | +$2.3bn+2,326,538 | Added |
| Arrowstreet Capital LP Quantitative · $225bn book | $2.1bn | 0.9% | 2,138,429 | +$1.5bn+704,934 | Added |
| Janus Henderson Group Ltd Long-only · $245bn book | $1.6bn | 0.6% | 1,608,436 | +$1.2bn+640,908 | Added |
| Jane Street Group LLC Quantitative · $1206bn book | $1.4bn | 0.1% | 1,473,813 | +$1.4bn+1,454,111 | Added |
| T. Rowe Price Associates Inc Long-only · $999bn book | $1.4bn | 0.1% | 1,430,343 | +$887m+171,946 | Added |
| D. E. Shaw & Co. Quantitative · $210bn book | $1.3bn | 0.6% | 1,354,377 | +$802m+64,804 | Added |
| AQR Capital Management LLC Quantitative · $287bn book | $1.2bn | 0.4% | 1,245,371 | +$818m+244,332 | Added |
| Lone Pine Capital LLC Long/short equity · $16.4bn book | $965m | 5.9% | 1,000,109 | opened1,000,109 | New |
| Point72 Asset Management LP Multi-strategy · $90.7bn book | $794m | 0.9% | 822,914 | +$580m+276,536 | Added |
| Citadel Advisors LLC Multi-strategy · $875bn book | $729m | 0.1% | 755,495 | +$686m+644,750 | Added |
| Millennium Management LLC Multi-strategy · $276bn book | $611m | 0.2% | 633,069 | +$513m+382,790 | Added |
| Sachem Head Capital Management LP Activist · $4.8bn book | $456m | 9.5% | 472,000 | opened472,000 | New |
| Holocene Advisors LP Long/short equity · $44.4bn book | $444m | 1.0% | 460,184 | +$18m-627,433 | Trimmed |
| Renaissance Technologies LLC Quantitative · $72.6bn book | $441m | 0.6% | 457,353 | +$320m+146,859 | Added |
| Acadian Asset Management LLC Quantitative · $84.2bn book | $432m | 0.5% | 447,945 | +$195m-156,948 | Trimmed |
| Two Sigma Investments LP Quantitative · $138bn book | $342m | 0.2% | 354,816 | +$302m+252,291 | Added |
| Tiger Global Management LLC Long/short equity · $24.0bn book | $275m | 1.1% | 285,100 | opened285,100 | New |
| AllianceBernstein LP Long-only · $302bn book | $254m | 0.1% | 649,106 | +$201m+453,734 | Added |
| Balyasny Asset Management LLC Multi-strategy · $80.2bn book | $247m | 0.3% | 256,151 | +$92m-139,985 | Trimmed |
| Bridgewater Associates LP Macro · $24.4bn book | $193m | 0.8% | 199,822 | +$64m-129,295 | Trimmed |
| Neuberger Berman Group LLC Long-only · $150bn book | $191m | 0.1% | 197,863 | +$126m+31,340 | Added |
| Whale Rock Capital Management LLC Long/short equity · $12.5bn book | $143m | 1.2% | 148,543 | opened148,543 | New |
| Marshall Wace LLP Quantitative · $127bn book | $100m | 0.1% | 103,612 | +$94m+89,187 | Added |
| Schonfeld Strategic Advisors LLC Multi-strategy · $27.9bn book | $98m | 0.4% | 101,944 | +$63m+11,401 | Added |
| Davidson Kempner Capital Management LP Long/short equity · $8.4bn book | $58m | 0.7% | 59,600 | +$18m-42,100 | Trimmed |
| Woodline Partners LP Long/short equity · $32.4bn book | $53m | 0.2% | 54,714 | -$29m-152,793 | Trimmed |
| Verition Fund Management LLC Multi-strategy · $19.7bn book | $42m | 0.2% | 43,540 | +$42m+42,218 | Added |
| Rokos Capital Management LLP Macro · $26.8bn book | $38m | 0.1% | 39,320 | -$11m-86,171 | Trimmed |
| D1 Capital Partners LP Long/short equity · $34.8bn book | $29m | 0.1% | 30,115 | opened30,115 | New |
| Walleye Capital LLC Multi-strategy · $28.0bn book | $27m | 0.1% | 27,721 | -$27m-109,707 | Trimmed |
| PDT Partners LLC Quantitative · $1.9bn book | $20m | 1.0% | 20,300 | opened20,300 | New |
| Winton Group Ltd Quantitative · $3.1bn book | $8.0m | 0.3% | 8,256 | +$6.6m+4,865 | Added |
| Quantbot Technologies LP Quantitative · $2.5bn book | $5.5m | 0.2% | 5,651 | opened5,651 | New |
| Maverick Capital Ltd Long/short equity · $11.3bn book | $1.2m | 0.0% | 1,210 | opened1,210 | New |
Sold out of this quarter
Valued at what the position was worth in the previous filing, because by this one it is gone.
- Soroban Capital Partners LP · Long/short equity$209m held before
Ownership through time
At least 45 of the 95 managers whose filings are on file listed STX in Q2 2026, against 8 in Q2 2021. 15 managers more than in Q1 2026: 9 started positions; 9 listed it again; 1 sold out, by its own filing; 2 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.
Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.
- Q2 2021: 8
- Q3 2021: 9
- Q4 2021: 10
- Q1 2022: 10
- Q2 2022: 12
- Q3 2022: 10
- Q4 2022: 11
- Q1 2023: 10
- Q2 2023: 14
- Q3 2023: 16
- Q4 2023: 14
- Q1 2024: 17
- Q2 2024: 17
- Q3 2024: 21
- Q4 2024: 21
- Q1 2025: 12
- Q2 2025: 24
- Q3 2025: 20
- Q4 2025: 21
- Q1 2026: 30
- Q2 2026: 45
- Q2 2021: $2.9bn
- Q3 2021: $2.4bn
- Q4 2021: $3.3bn
- Q1 2022: $2.3bn
- Q2 2022: $2.0bn
- Q3 2022: $1.5bn
- Q4 2022: $1.9bn
- Q1 2023: $2.6bn
- Q2 2023: $2.4bn
- Q3 2023: $3.1bn
- Q4 2023: $3.8bn
- Q1 2024: $3.4bn
- Q2 2024: $3.4bn
- Q3 2024: $3.5bn
- Q4 2024: $2.8bn
- Q1 2025: $2.5bn
- Q2 2025: $4.1bn
- Q3 2025: $4.5bn
- Q4 2025: $7.8bn
- Q1 2026: $13.7bn
- Q2 2026: $40.7bn
Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.
Started in Q2 2026
Largest increases, by shares
- Lone Pine Capital LLCnew: 1,000,109 shares+$965m
- Arrowstreet Capital LP1,433,495 to 2,138,429 shares+$680m
- Janus Henderson Group Ltd967,528 to 1,608,436 shares+$618m
- Sachem Head Capital Management LPnew: 472,000 shares+$455m
- Millennium Management LLC250,279 to 633,069 shares+$369m
Largest decreases, by shares
- Capital Research Global Investors5,736,070 to 4,326,781 shares-$1.4bn
- Holocene Advisors LP1,087,617 to 460,184 shares-$605m
- Squarepoint Ops LLC268,866 to 63,882 shares-$198m
- Acadian Asset Management LLC604,893 to 447,945 shares-$151m
- Woodline Partners LP207,507 to 54,714 shares-$147m
Left it
- Soroban Capital Partners LPwas $209m
| Manager | Value over time | First listed | Largest | Q2 2026 |
|---|---|---|---|---|
| Fidelity (FMR LLC) | Q2 2021 | $7.9bn | $7.9bn | |
| Invesco Ltd | Q2 2021 | $7.3bn | $7.3bn | |
| Capital Research Global Investors | Q3 2023 | $4.2bn | $4.2bn | |
| MFS Investment Management | Q3 2022 | $2.5bn | $2.5bn | |
| Wellington Management Group LLP | Q1 2023 | $2.3bn | $2.3bn | |
| Arrowstreet Capital LP | Q3 2021 | $2.1bn | $2.1bn | |
| Janus Henderson Group Ltd | Q2 2021 | $1.6bn | $1.6bn | |
| Jane Street Group LLC | Q2 2026 | $1.4bn | $1.4bn | |
| T. Rowe Price Associates Inc | Q3 2025 | $1.4bn | $1.4bn | |
| D. E. Shaw & Co. | Q2 2025 | $1.3bn | $1.3bn | |
| AQR Capital Management LLC | Q2 2022 | $1.2bn | $1.2bn | |
| Lone Pine Capital LLC | Q2 2026 | $965m | $965m | |
| Point72 Asset Management LP | Q3 2024 | $794m | $794m | |
| Citadel Advisors LLC | Q2 2022 | $729m | $729m | |
| Millennium Management LLC | Q2 2024 | $611m | $611m | |
| ValueAct Holdings LP | Q2 2021 | $1.7bn | last listed Q4 2023 | |
| Egerton Capital UK LLP | Q2 2025 | $376m | last listed Q4 2025 | |
| Viking Global Investors LP | Q4 2022 | $365m | last listed Q2 2023 | |
| Soroban Capital Partners LP | Q1 2025 | $209m | last listed Q1 2026 | |
| Two Sigma Advisers LP | Q2 2021 | $178m | last listed Q3 2024 | |
| Voloridge Investment Management LLC | Q3 2021 | $79m | last listed Q3 2025 | |
| Glenview Capital Management LLC | Q3 2024 | $44m | last listed Q3 2024 | |
| Tudor Investment Corp | Q3 2023 | $40m | last listed Q1 2026 | |
| Baupost Group LLC | Q1 2023 | $40m | last listed Q3 2023 | |
| ExodusPoint Capital Management LP | Q2 2022 | $8.5m | last listed Q2 2025 |
Reported as options rather than shares
A put or a call on a name is not a position in it, and the filing states the notional rather than what the option cost. These lines are listed apart for that reason and are not counted in anything above.
- Jane Street Group LLC · puts$5.0bn notional
- Susquehanna International Group LLP · puts$3.5bn notional
- Citadel Advisors LLC · puts$3.1bn notional
- Susquehanna International Group LLP · calls$1.9bn notional
- Citadel Advisors LLC · calls$1.2bn notional
- Jane Street Group LLC · calls$1.2bn notional
- D. E. Shaw & Co. · puts$364m notional
- Millennium Management LLC · calls$228m notional
- Tudor Investment Corp · calls$53m notional
What STX is worth
Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.
Build the comp set around STX →How much of the picture this is
A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.
What to do with a name the funds are buying
Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.
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The holdings, every quarter, and the week between
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