Fund · iShares 20+ Year Treasury Bond ETF · measured from SEC filings
TLT holdings
TLT reports 47 holdings and behaves like 31.3 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-05-31. The fact sheet publishes the first number; this page computes the second, and traces it across 27 quarters of filings.
Measured concentration
as of 2026-05-31Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 1.06% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-05-31TLT's largest investment is U.S. Treasury Bonds at 4.58% of net assets. U.S. Treasury Bonds and U.S. Treasury Bonds follow; the three together are 13.54%. Ten companies are 42.23% of the fund; the other 37 share the rest. Among the 192 bond funds measured here, TLT behaves like 31.3 holdings against a median of 236.4 — 7.7 times more concentrated than the median. Across 27 quarterly filings TLT has become less concentrated: it behaved like 19.6 at 2019-11-30 and 31.3 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 2 positions were added and 1 dropped; 6.2% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable bond funds on this site. Nothing here is a view on the fund.
Every filing since 2019
27Between 2019-11-30 and 2026-05-31, TLT went from behaving like 19.6 equally weighted positions to 31.3 — 60% more, while its top ten went from 61.05% to 42.23% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-05-31 | 47 | 31.3 | 42.23% | 4.61% |
| 2026-02-28 | 46 | 30.6 | 43.74% | 4.87% |
| 2025-11-30 | 45 | 30 | 44.19% | 5.05% |
| 2025-08-31 | 44 | 29.7 | 44.99% | 5.77% |
| 2025-05-31 | 42 | 28.1 | 47.28% | 6.41% |
| 2025-02-28 | 47 | 27.5 | 48.41% | 6.44% |
| 2024-11-30 | 47 | 27.5 | 48.06% | 6.45% |
| 2024-08-31 | 46 | 26.2 | 49.59% | 7.05% |
Earlier filings (19 more, back to 2019-11-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-05-31 | 45 | 24.7 | 51.73% | 7.87% |
| 2024-02-29 | 43 | 24.2 | 53.34% | 8.13% |
| 2023-11-30 | 42 | 24 | 53.37% | 8.13% |
| 2023-08-31 | 41 | 22.4 | 56.35% | 9.54% |
| 2023-05-31 | 36 | 19.5 | 61.46% | 10.89% |
| 2023-02-28 | 35 | 19.4 | 61.7% | 10.88% |
| 2022-11-30 | 33 | 18.7 | 63.69% | 11.04% |
| 2022-08-31 | 33 | 17.7 | 64.45% | 12.84% |
| 2022-05-31 | 33 | 17.9 | 63.96% | 12.89% |
| 2022-02-28 | 36 | 19.3 | 61.34% | 11.15% |
| 2021-11-30 | 37 | 18.7 | 62.67% | 11.74% |
| 2021-08-31 | 31 | 19.6 | 60.41% | 10.28% |
| 2021-05-31 | 38 | 20.3 | 59.31% | 8.67% |
| 2021-02-28 | 38 | 21.4 | 57.13% | 8.67% |
| 2020-11-30 | 51 | 22.5 | 54.77% | 8.76% |
| 2020-08-31 | 47 | 20.7 | 59.13% | 9.38% |
| 2020-05-31 | 45 | 20.5 | 59.51% | 9.41% |
| 2020-02-29 | 40 | 20.3 | 59.53% | 9.2% |
| 2019-11-30 | 37 | 19.6 | 61.05% | 8.88% |
One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.
Compared with, in the essays
2Overlap with other funds
2Measured against every other fund on this site, from the same filings. Combined effective holdings is how the pair behaves held in equal size.
| With | Overlap | Shared | Combined effective |
|---|---|---|---|
| TLT vs IEF | 1.06% | 1 | 35.6 |
| TLT vs SHY | 0.2% | 1 | 91 |
Largest positions, as filed
as of 2026-05-31The 15 largest of 47 positions in TLT's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: TLT.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States of America | 4.61% | 4.6% |
| 2 | United States of America | 4.53% | 9.1% |
| 3 | United States of America | 4.49% | 13.6% |
| 4 | United States of America | 4.43% | 18.1% |
| 5 | United States of America | 4.18% | 22.3% |
| 6 | United States of America | 4.07% | 26.3% |
| 7 | United States of America | 4.06% | 30.4% |
| 8 | United States of America | 3.98% | 34.4% |
| 9 | United States of America | 3.97% | 38.3% |
| 10 | United States of America | 3.89% | 42.2% |
| 11 | United States of America | 3.83% | 46.1% |
| 12 | United States of America | 3.65% | 49.7% |
| 13 | United States of America | 3.49% | 53.2% |
| 14 | United States of America | 2.99% | 56.2% |
| 15 | United States of America | 2.92% | 59.1% |
Returns the fund reported
2019-09 – 2026-05Monthly total returns from Item B.5 of TLT's own filings, 81 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference 0.07 percentage points over 81 months, which is roughly the distributions. Every month with the filing it came from: TLT.json · all funds.
Who borrows TLT's shares
2023-02-28The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2023-02-28, $6m was out to 1 borrower, 0.02% of net assets.
| Borrower | On loan | Share of the loan |
|---|---|---|
| CITIGROUP GLOBAL MARKETS INC. | $6m | 100.0% |
Cash collateral reported against the loan: 0.02% of net assets, 106.1% of the amount lent. That is a floor on the collateral, not the whole of it — collateral the fund does not hold as a position is not in this filing, so a figure under 100% is not evidence of under-collateralisation. How that figure behaves across all funds. Every quarter TLT has filed, with each borrower: TLT.json · all funds.
Since the previous filing
2026-02-28 → 2026-05-3146 positions became 47: 2 added (4.5% of the fund at the later date), 1 dropped (0.1% at the earlier date). Half the sum of all weight changes, a turnover proxy: 6.2%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of TLT compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-02-28 | 2026-05-31 | Largest decreases | 2026-02-28 | 2026-05-31 |
|---|---|---|---|---|---|
| United States of America | 1.33% | 2.56% | United States of America | 1.82% | 0.38% |
| United States of America | 2.71% | 2.99% | United States of America | 2.24% | 1.03% |
| United States of America | 2.82% | 2.84% | United States of America | 3.72% | 2.75% |
| United States of America | 4.42% | 4.43% | United States of America | 4.78% | 4.07% |
| United States of America | 4.49% | 4.49% | United States of America | 4.87% | 4.18% |
| United States of America | 2.64% | 2.65% | United States of America | 1.24% | 0.90% |
New: United States of America (3.98%), United States of America (0.54%). Gone: United States of America (0.11%).
Asset categories and pricing
as of 2026-05-3198.94% debt, 1.06% short-term investment as filed; 1.1% carried at a quoted market price (fair-value level 1). Categories and levels are the filer's; what a low level-1 share does and does not mean is in the measure's page.
Neighbours by effective holdings, debt funds
10Every measured debt fund lined up by how many holdings it behaves like; these sit either side of TLT (31.3). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| AGZ iShares Agency Bond ETF | 100 | 25.5 | 50.6% | 2026-05-31 |
| ULST State Street(R) Ultra Short Term Bond ETF | 319 | 26.1 | 48.18% | 2026-06-30 |
| TIPX State Street(R) SPDR(R) Bloomberg 1-10 Year TIPS ETF | 33 | 29.4 | 39.01% | 2026-06-30 |
| GOVI Invesco Equal Weight 0-30 Year Treasury ETF | 31 | 30 | 33.82% | 2026-05-31 |
| IBTJ iShares iBonds Dec 2029 Term Treasury ETF | 35 | 30.7 | 40.15% | 2026-07-31 |
| FSTB Fidelity Short-Term Bond Fund | 463 | 33.1 | 44.65% | 2026-05-31 |
| APCB ActivePassive Core Bond ETF | 1,843 | 33.8 | 32.97% | 2026-05-31 |
| SCHP Schwab U.S. TIPS ETF | 49 | 36.2 | 36.43% | 2026-06-30 |
| TIP iShares TIPS Bond ETF | 49 | 36.3 | 35.76% | 2026-07-31 |
| TLH iShares 10-20 Year Treasury Bond ETF | 67 | 37.2 | 37.79% | 2026-05-31 |
Measures applied in the essays
6Essays that examine TLT
6-
How Long Will Your Money Last? The 4% Rule Tested on 25 Years of Real Fund Returns
A retirement withdrawal test that uses the actual monthly returns of VTI, QQQ, IWM, AGG and TLT since 1999-2003 — including 2000-02 and 2008 — instead of an assumed return distribution. Eight portfolios, four withdrawal rates, 2,000 resampled 30-year paths each. The 4% rule survives almost everywhere in nominal terms; the interesting numbers are at 5%, 6% and 7%, and in what a bad decade does to a bond-only or Nasdaq-only retiree.
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Duration and Convexity: What Bond-ETF Investors Get Wrong About Rate Sensitivity
Duration, not credit, is the dominant risk in high-quality bond ETFs — and TLT carries roughly three times BND's. Convexity is real but it is a second-order...
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TLT vs IEF vs SHY: Building a Treasury Duration Ladder for Different Rate Scenarios
TLT, IEF, and SHY charge the same 0.15% expense ratio, so this decision is not about cost — it is entirely about how much interest-rate duration you want to...
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The "All-Weather" AI Portfolio: Combining Diversification with Predictive Power
Dalio's "all-weather" idea is sound on its merits — risk-balanced exposure across four macro environments — and is implementable today with five or six...
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What SGOV and Gold Actually Do: A Quant Look at Defensive Assets in 2026
SGOV's five-year realized volatility is 0.2% and its worst drawdown was 0.03% — it behaves like cash with a yield, not like a "bond." The 3.9% distribution...
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Tax-Loss Harvesting and the After-Tax Compounding Gap: What the Math Actually Shows
Over a 30-year horizon, a 1-percentage-point reduction in annual tax drag compounds into roughly a one-third increase in terminal wealth — not because of...
Mentions are detected across the full text of every article, so an appearance may be a passing comparison rather than the subject. Nothing here is a recommendation to buy or sell — see the disclaimer.