IWM vs SLYG: Holdings Overlap
iShares · 1941 holdings · $82.2B · as of 2026-03-31
SLYGState Street® SPDR® S&P 600™ Small Cap Growth ETF
State Street (SPDR) · 349 holdings · $5.3B · as of 2026-08-06
Holdings snapshots are 128 days apart (IWM: 2026-03-31, SLYG: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IWM and SLYG?
iShares Russell 2000 ETF (IWM, by iShares) holds 1941 positions; State Street® SPDR® S&P 600™ Small Cap Growth ETF (SLYG, by State Street (SPDR)) holds 349. They have 312 holdings in common, and by portfolio weight the two funds are 28.6% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 28.6%Sum of the smaller weight of each shared holding
- Shared Holdings
- 312IWM holds 1941 · SLYG holds 349
- Weight in Shared Holdings
- IWM 29%·SLYG 86%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IWM
1629 of 1941 positions (71.1% of the fund) are not held by SLYG. Showing the top 30 by weight.
Only in SLYG
37 of 349 positions (13.5% of the fund) are not held by IWM. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWM | SLYG |
|---|---|---|
| Industrials | 17.9% | 21.9% |
| Health Care | 16.6% | 15.0% |
| Financials | 15.3% | 15.7% |
| Information Technology | 13.6% | 13.8% |
| Consumer Discretionary | 8.0% | 12.0% |
| Other Sectors | 22.7% | 20.6% |
| Unclassified | 5.5% | 0.9% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (5% of IWM, 1% of SLYG).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWM | +1.8% | +23.0% | +38.6% | +17.1% | +7.5% | +10.8% | 0.88% |
| SLYG | +1.2% | +25.9% | +33.5% | +15.2% | +6.7% | +11.2% | 0.64% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IWM vs SLYG →
Shared Holdings(312)
The top 10 shared positions account for 8% of the overlap, led by PRIM, FORM and AGX.
 PRIMPrimoris Services Corp. COM | 0.26% | 0.49% | 0.26% |
|---|---|---|---|
 FORMFormfactor Inc COM | 0.26% | 1.00% | 0.26% |
 AGXArgan Inc COM | 0.25% | 0.92% | 0.25% |
 ESEESCO Technologies Inc. COM | 0.25% | 0.95% | 0.25% |
 ZWSZurn Elkay Water Solutions Corporation COM | 0.23% | 0.86% | 0.23% |
 JBTMJBT Marel Corp. COM | 0.23% | 0.71% | 0.23% |
 LUMNLumen Technologies Inc COM | 0.23% | 0.28% | 0.23% |
 FSSFederal Signal Corp. COM | 0.22% | 0.87% | 0.22% |
 TRNOTerreno Realty Corporation COM | 0.21% | 0.57% | 0.21% |
 NENoble Corporation PLC ORD SHS A | 0.21% | 0.30% | 0.21% |
 EATBrinker International, Inc. COM | 0.21% | 1.09% | 0.21% |
 IBPInstalled Building Products Inc COM | 0.21% | 0.60% | 0.21% |
 PTGXProtagonist Therapeutics Inc COM | 0.21% | 0.99% | 0.21% |
 EPRTEssential Properties Realty Trust Inc. COM | 0.20% | 0.50% | 0.20% |
 GKOSGlaukos Corp. COM | 0.20% | 0.77% | 0.20% |
 AROCArchrock Inc COM | 0.20% | 0.65% | 0.20% |
 SNEXStoneX Group Inc COM | 0.20% | 0.79% | 0.20% |
 ALKSAlkermes PLC COM USD0.01 | 0.20% | 0.90% | 0.20% |
 RHPRyman Hospitality Properties Inc COM | 0.19% | 0.88% | 0.19% |
 VSATViaSat, Inc. COM | 0.19% | 1.24% | 0.19% |
 BCPCBalchem Corp COM | 0.19% | 0.38% | 0.19% |
 PLXSPlexus Corp COM | 0.18% | 0.35% | 0.18% |
 PTCTPTC Therapeutics, Inc. COM | 0.18% | 0.66% | 0.18% |
 PIPRPiper Sandler Companies COM NEW | 0.18% | 0.30% | 0.18% |
 NPOEnpro Inc COM | 0.18% | 0.79% | 0.18% |
Showing the top 250 of 312 shared holdings by overlap weight.
Frequently Asked Questions
How much do IWM and SLYG overlap?
IWM and SLYG overlap by 28.6% of portfolio weight. They share 312 holdings (IWM holds 1941 positions and SLYG holds 349), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWM and SLYG?
The two portfolios are 28.6% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IWM and SLYG?
The largest positions held by both funds are PRIM, FORM, AGX, ESE and ZWS. Together the top 10 shared positions account for 8% of the total overlap.
What does IWM own that SLYG doesn't?
1629 positions (71.1% of IWM) are unique to IWM, led by BE, CDE and FN. In the other direction, 37 positions (13.5% of SLYG) are unique to SLYG.