CIK: 0001533421
Total reported value
$3.8B
Reporting period: 2026-03-31 · Number of holdings: 6440
Tower Research Capital LLC (TRC) disclosed 6440 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $3.8B and a quarterly turnover rate of 84.5%.
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Tower Research Capital LLC (TRC)'s disclosed holdings carry a Herfindahl concentration index of 0.007 — mathematically equivalent to about 145 equally-sized positions, well below its 6440 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 5.84), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 65% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Add QQQ
+2685488.9% $139.5M
Add SOXL
+888393.3% $114.1M
Trim NVDA
-60.2% -$110.5M
Trim AAPL
-44.4% -$104.1M
Trim AMZN
-69.7% -$83.6M
Add MU
+168.4% $62.3M
Showing top 200 holdings (of 6440 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | QQQ | Invesco Qqq Trust Series 1 | ETF-Tech | 3.63% | +3.63% | +2685488.89% | |
| 2 | SOXL | Direx Dail Semi Bu 3x Et-usd | ETF-Other | 2.96% | +2.96% | +888393.28% | |
| 3 | AAPL | Apple INC | Stock-Tech | 2.91% | -2.32% | -44.43% | |
| 4 | MSFT | Microsoft CORP | Stock-Tech | 2.43% | -1.54% | -25.38% | |
| 5 | MU | Micron Technology INC | Stock-Tech | 2.36% | +1.67% | +168.37% | |
| 6 | TSLA | Tesla INC | Stock-Consumer Disc | 1.80% | — | +10.31% | |
| 7 | NVDA | Nvidia CORP | Stock-Tech | 1.71% | -2.55% | -60.16% | |
| 8 | AVGO | Broadcom INC | Stock-Tech | 1.44% | -0.69% | -29.49% | |
| 9 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.27% | -0.93% | -41.78% | |
| 10 | AGG | Ishares Core U.s. Aggregate | ETF-Other | 1.03% | +1.03% | NEW | |
| 11 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 0.92% | +0.91% | +7781.22% | |
| 12 | PPH | Vaneck Pharmaceutical ETF | ETF-Other | 0.82% | +0.80% | +3379.59% | |
| 13 | AMZN | Amazon.com INC | Stock-Consumer Disc | 0.82% | -1.96% | -69.74% | |
| 14 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.76% | — | +2.02% | |
| 15 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.73% | -1.32% | -61.61% | |
| 16 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 0.69% | -1.51% | -67.94% | |
| 17 | WMT | Walmart INC | Stock-Consumer Staples | 0.68% | — | +30.33% | |
| 18 | SPIB | Ss Spdr P Int C CORP ETF | ETF-Other | 0.66% | +0.66% | NEW | |
| 19 | CVX | Chevron CORP | Stock-Energy | 0.63% | +0.40% | +87.09% | |
| 20 | VOD | Vodafone Group Plc-sp Adr | Stock-Comm Services | 0.63% | — | +20.65% | |
| 21 | JAAA | Janus Henderson Aaa Clo ETF | ETF-Other | 0.62% | +0.62% | NEW | |
| 22 | SHEL | Shell Plc-adr | Stock-Energy | 0.61% | +0.53% | +480.97% | |
| 23 | GSK | Gsk Plc-spon Adr | Stock-Healthcare | 0.54% | +0.27% | +64.04% | |
| 24 | LLY | Eli Lilly & Co | Stock-Healthcare | 0.52% | — | +14.93% | |
| 25 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 0.52% | -0.19% | -41.73% | |
| 26 | XOM | Exxon Mobil CORP | Stock-Energy | 0.51% | +0.30% | +58.98% | |
| 27 | BP | Bp Plc-spons Adr | Stock-Energy | 0.51% | — | +31.92% | |
| 28 | NFLX | Netflix INC | Stock-Comm Services | 0.46% | -0.27% | -43.01% | |
| 29 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 0.45% | — | -29.72% | |
| 30 | JNJ | Johnson & Johnson | Stock-Healthcare | 0.43% | — | +11.39% | |
| 31 | MA | Mastercard INC - A | Stock-Financials | 0.41% | — | +48.24% | |
| 32 | AZN | AstraZeneca PLC | Stock-Healthcare | 0.41% | +0.41% | NEW | |
| 33 | DEO | Diageo Plc-sponsored Adr | Stock-Consumer Staples | 0.41% | — | +25.12% | |
| 34 | SNDK | Sandisk CORP | Stock-Tech | 0.39% | +0.36% | +329.78% | |
| 35 | LIN | Linde plc | Stock-Materials | 0.39% | — | -10.44% | |
| 36 | V | Visa Inc-class A Shares | Stock-Financials | 0.37% | — | -14.06% | |
| 37 | XLI | Ss Industrial Select Sector | ETF-Other | 0.36% | +0.36% | NEW | |
| 38 | AMAT | Applied Materials INC | Stock-Tech | 0.36% | — | -32.87% | |
| 39 | ADI | Analog Devices INC | Stock-Tech | 0.34% | — | +14.80% | |
| 40 | USMV | Ishares Msci USA Min Vol Fac | ETF-Other | 0.34% | +0.26% | +286.25% | |
| 41 | USFR | Wisdomtree Floating Rate Tre | ETF-Other | 0.34% | -0.44% | -59.71% | |
| 42 | HD | Home Depot INC | Stock-Consumer Disc | 0.33% | — | -19.49% | |
| 43 | OIH | Vaneck Oil Services ETF | ETF-Other | 0.33% | +0.28% | +376.26% | |
| 44 | SHOP | Shopify INC - Class A | Stock-Tech | 0.33% | — | +71.22% | |
| 45 | ASML | ASML Holding N.V. | Stock-Tech | 0.32% | — | -40.97% | |
| 46 | PLTR | Palantir Technologies Inc-a | Stock-Tech | 0.31% | -0.42% | -51.97% | |
| 47 | IWN | Ishares Russell 2000 Value E | ETF-Small Cap | 0.30% | +0.24% | +364.71% | |
| 48 | TMUS | T-mobile US INC | Stock-Comm Services | 0.29% | — | -0.02% | |
| 49 | VIG | Vanguard Dividend Apprec ETF | ETF-Other | 0.29% | +0.29% | NEW | |
| 50 | PANW | Palo Alto Networks INC | Stock-Tech | 0.29% | — | +35.31% |
Performance for Q3 2026
-1.3%
Performance Last 4 Quarters
+20%
Based on 77% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 6440 | $3.8B | 84 | |
| 2025-12-31 | 6626 | $4.1B | 94 | |
| 2025-09-30 | 7635 | $3.6B | 90 | |
| 2025-06-30 | 7722 | $3.7B | 0 | |
| 2025-03-31 | 7604 | $3.4B | 100 | |
| 2024-12-31 | 9043 | $5.0B | 0 | |
| 2024-09-30 | 8770 | $3.8B | 0 | |
| 2024-06-30 | 8333 | $5.9B | 0 | |
| 2024-03-31 | 8675 | $4.2B | 0 | |
| 2023-12-31 | 9605 | $8.1B | 0 | |
| 2023-09-30 | 9639 | $3.2B | 0 | |
| 2023-06-30 | 9702 | $3.0B | 0 | |
| 2023-03-31 | 8994 | $3.1B | 0 | |
| 2022-12-31 | 9747 | $2.4B | 0 | |
| 2022-09-30 | 9869 | $6.2B | 0 | |
| 2022-06-30 | 9337 | $4.5B | 0 | |
| 2022-03-31 | 9397 | $10.5B | 0 | |
| 2021-12-31 | 9540 | $5.8B | 0 | |
| 2021-09-30 | 9132 | $3.9B | 0 | |
| 2021-06-30 | 8538 | $3.8B | 100 | |
| 2021-03-31 | 8509 | $5.9B | 100 | |
| 2020-12-31 | 8157 | $3.3B | 100 | |
| 2020-09-30 | 7398 | $9.0B | 100 | |
| 2020-06-30 | 6981 | $2.4B | 100 | |
| 2020-03-31 | 4112 | $1.6B | 100 | |
| 2019-12-31 | 4392 | $1.2B | 100 | |
| 2019-09-30 | 5851 | $1.5B | 100 | |
| 2019-06-30 | 5001 | $1.5B | 97 | |
| 2019-03-31 | 5312 | $1.6B | 100 | |
| 2018-12-31 | 5226 | $1.4B | 100 | |
| 2018-09-30 | 5389 | $1.4B | 100 | |
| 2018-06-30 | 5211 | $1.8B | 100 | |
| 2018-03-31 | 4087 | $1.2B | 100 | |
| 2017-12-31 | 5040 | $775.2M | 100 | |
| 2017-09-30 | 5883 | $1.2B | 100 | |
| 2017-06-30 | 3613 | $880.8M | 100 | |
| 2017-03-31 | 3878 | $1.0B | 100 | |
| 2016-12-31 | 5604 | $921.2M | 100 | |
| 2016-09-30 | 4625 | $1.0B | 100 | |
| 2016-06-30 | 6142 | $1.0B | 100 | |
| 2016-03-31 | 5153 | $671.7M | 100 | |
| 2015-12-31 | 5429 | $617.0M | 95 | |
| 2015-09-30 | 5085 | $1.0B | 85 | |
| 2015-06-30 | 5945 | $1.1B | 100 | |
| 2015-03-31 | 6014 | $808.9M | 100 | |
| 2014-12-31 | 4984 | $1.0B | 100 | |
| 2014-09-30 | 5973 | $892.2M | 100 | |
| 2014-06-30 | 5291 | $778.1M | 100 | |
| 2014-03-31 | 6002 | $779.9M | 100 | |
| 2013-12-31 | 5355 | $599.2M | 100 | |
| 2013-09-30 | 6676 | $927.8M | 100 | |
| 2013-06-30 | 4494 | $1.2B | 0 |
Tower Research Capital LLC (TRC)'s most significant position changes for 2026-03-31: Sold out: Ss Spdr Bb St Hi Yield ETF (SJNK); New buy: Ishares Core U.s. Aggregate (AGG); New buy: Ss Spdr P Int C CORP ETF (SPIB); New buy: Janus Henderson Aaa Clo ETF (JAAA); New buy: AstraZeneca PLC (AZN).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | QQQ | Invesco Qqq Trust Series 1 | +3.6% | +2685488.89% | Add |
| 2 | SOXL | Direx Dail Semi Bu 3x Et-usd | +3% | +888393.28% | Add |
| 3 | MU | Micron Technology INC | +1.7% | +168.37% | Add |
| 4 | SPY | Ss Spdr S&p 500 ETF Trust-us | +0.9% | +7781.22% | Add |
| 5 | PPH | Vaneck Pharmaceutical ETF | +0.8% | +3379.59% | Add |
| 6 | SHEL | Shell Plc-adr | +0.5% | +480.97% | Add |
| 7 | CVX | Chevron CORP | +0.4% | +87.09% | Add |
| 8 | SNDK | Sandisk CORP | +0.4% | +329.78% | Add |
| 9 | XOM | Exxon Mobil CORP | +0.3% | +58.98% | Add |
| 10 | OIH | Vaneck Oil Services ETF | +0.3% | +376.26% | Add |
| 11 | GSK | Gsk Plc-spon Adr | +0.3% | +64.04% | Add |
| 12 | VTV | Vanguard Value ETF | +0.3% | +231913.64% | Add |
| 13 | IWO | Ishares Russell 2000 Growth | +0.3% | +3200.50% | Add |
| 14 | USMV | Ishares Msci USA Min Vol Fac | +0.3% | +286.25% | Add |
| 15 | IWN | Ishares Russell 2000 Value E | +0.2% | +364.71% | Add |
| 16 | COST | Costco Wholesale CORP | -0.2% | -41.73% | Trim |
| 17 | IBM | Intl Business Machines CORP | -0.2% | -68.68% | Trim |
| 18 | EQNR | Equinor Asa-spon Adr | -0.2% | -99.94% | Trim |
| 19 | SOXX | Ishares Semiconductor ETF | -0.2% | -99.54% | Trim |
| 20 | ORCL | Oracle CORP | -0.3% | -79.86% | Trim |
| 21 | NFLX | Netflix INC | -0.3% | -43.01% | Trim |
| 22 | TLT | Ishares 20+ Year Treasury Bd | -0.3% | -93.51% | Trim |
| 23 | QCOM | Qualcomm INC | -0.3% | -77.38% | Trim |
| 24 | SHY | Ishares 1-3 Year Treasury Bo | -0.3% | -99.84% | Trim |
| 25 | CSCO | Cisco Systems INC | -0.3% | -59.59% | Trim |
| 26 | IWF | Ishares Russell 1000 Growth | -0.4% | -99.97% | Trim |
| 27 | PLTR | Palantir Technologies Inc-a | -0.4% | -51.97% | Trim |
| 28 | USFR | Wisdomtree Floating Rate Tre | -0.4% | -59.71% | Trim |
| 29 | VCSH | Vanguard S/t CORP Bond ETF | -0.6% | -99.91% | Trim |
| 30 | AVGO | Broadcom INC | -0.7% | -29.49% | Trim |
| 31 | AMD | Advanced Micro Devices | -0.7% | -82.34% | Trim |
| 32 | GSY | Invesco Ultra Short Duration | -0.9% | -91.44% | Trim |
| 33 | IWM | Ishares Russell 2000 ETF | -0.9% | -96.49% | Trim |
| 34 | GOOGL | Alphabet Inc-cl A | -0.9% | -41.78% | Trim |
| 35 | META | Meta Platforms Inc-class A | -1.3% | -61.61% | Trim |
| 36 | GOOG | Alphabet Inc-cl C | -1.5% | -67.94% | Trim |
| 37 | MSFT | Microsoft CORP | -1.5% | -25.38% | Trim |
| 38 | AMZN | Amazon.com INC | -2% | -69.74% | Trim |
| 39 | AAPL | Apple INC | -2.3% | -44.43% | Trim |
| 40 | NVDA | Nvidia CORP | -2.6% | -60.16% | Trim |
| 41 | SJNK | Ss Spdr Bb St Hi Yield ETF | — | EXIT | Sold out |
| 42 | AGG | Ishares Core U.s. Aggregate | — | NEW | New buy |
| 43 | SPIB | Ss Spdr P Int C CORP ETF | — | NEW | New buy |
| 44 | JAAA | Janus Henderson Aaa Clo ETF | — | NEW | New buy |
| 45 | AZN | AstraZeneca PLC | — | NEW | New buy |
| 46 | XLI | Ss Industrial Select Sector | — | NEW | New buy |
| 47 | PAAA | Pgim Aaa Clo ETF | — | EXIT | Sold out |
| 48 | JPST | Jpmorgan Ultra-short Income | — | EXIT | Sold out |
| 49 | VIG | Vanguard Dividend Apprec ETF | — | NEW | New buy |
| 50 | FLOT | Ishares Floating Rate Bond E | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-15 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-13 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-13 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-13 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-09 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-10 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-10 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-12 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-16 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-16 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-13 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-07 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-05 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-13 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-14 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-13 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-15 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-09 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-15 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-19 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-03 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-08 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-10 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-10 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-13 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-30 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-12 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-05 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-31 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-02 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-01-31 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-06 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-05 | 13F-HR | View on EDGAR |
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