IJK vs MDYG: Holdings Overlap
IJKiShares S&P Mid-Cap 400 Growth ETF
iShares · 242 holdings · $11.0B · as of 2026-03-31
MDYGState Street® SPDR® S&P 400™ Mid Cap Growth ETF
State Street (SPDR) · 245 holdings · $2.9B · as of 2026-08-06
Holdings snapshots are 128 days apart (IJK: 2026-03-31, MDYG: 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 IJK and MDYG?
iShares S&P Mid-Cap 400 Growth ETF (IJK, by iShares) holds 242 positions; State Street® SPDR® S&P 400™ Mid Cap Growth ETF (MDYG, by State Street (SPDR)) holds 245. They have 234 holdings in common, and by portfolio weight the two funds are 86.9% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 86.9%Sum of the smaller weight of each shared holding
- Shared Holdings
- 234IJK holds 242 · MDYG holds 245
- Weight in Shared Holdings
- IJK 95%·MDYG 93%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 IJK
8 of 242 positions (4.7% of the fund) are not held by MDYG.
Sector Breakdown
| Sector | IJK | MDYG |
|---|---|---|
| Industrials | 31.3% | 29.8% |
| Information Technology | 17.3% | 20.2% |
| Health Care | 14.4% | 15.5% |
| Consumer Discretionary | 10.2% | 9.0% |
| Financials | 7.2% | 8.0% |
| Other Sectors | 19.4% | 17.3% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IJK | +3.1% | +21.4% | +27.9% | +15.9% | +8.4% | +11.3% | 0.52% |
| MDYG | +3.3% | +21.6% | +28.0% | +16.0% | +8.5% | +11.3% | 0.56% |
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 IJK vs MDYG →
Shared Holdings(234)
The top 10 shared positions account for 14% of the overlap, led by FTI, CW and XPO.
 FTITechnipFMC PLC USD1 | 1.71% | 1.48% | 1.48% |
|---|---|---|---|
 CWCurtiss-Wright Corporation | 1.54% | 1.41% | 1.41% |
 XPOXPO Inc COM | 1.40% | 1.23% | 1.23% |
 ATIATI Inc COM | 1.21% | 1.63% | 1.21% |
 UTHRUnited Therapeutics Corporation COM | 1.57% | 1.21% | 1.21% |
 CRSCarpenter Technology Corporation COM | 1.20% | 1.48% | 1.20% |
 NVTNVent Electric PLC COM USD0.01 | 1.17% | 1.41% | 1.17% |
 TWLOTwilio, Inc., Class A | 1.17% | 1.56% | 1.17% |
 WWDWoodward Inc. COM | 1.31% | 1.16% | 1.16% |
 PEverpure, Inc., Class A | 1.14% | 1.47% | 1.14% |
 FNFabrinet COM USD0.01 | 1.15% | 1.04% | 1.04% |
 THCTenet Healthcare Corporation COM NEW | 1.02% | 1.18% | 1.02% |
 ITTITT Inc COM | 1.00% | 1.02% | 1.00% |
 RBCRBC Bearings Incorporated | 1.05% | 0.95% | 0.95% |
 RGLDRoyal Gold, Inc. COM | 1.26% | 0.95% | 0.95% |
 RBARB Global Inc COM | 1.09% | 0.92% | 0.92% |
 MTSIMACOM Technology Solutions Holdings Inc. COM | 0.88% | 1.06% | 0.88% |
 MTZMastec, Inc. COM | 1.21% | 0.85% | 0.85% |
 APGAPI Group Corp COM STK | 0.95% | 0.85% | 0.85% |
 TLNTalen Energy Corporation COM | 0.89% | 0.82% | 0.82% |
 OKTAOkta Inc. Class A | 0.82% | 1.28% | 0.82% |
 BWXTBWX Technologies Inc. COM | 1.15% | 0.81% | 0.81% |
 NBIXNeurocrine Biosciences Inc COM | 0.81% | 0.86% | 0.81% |
 STRLSterling Infrastructure Inc COM | 0.77% | 0.88% | 0.77% |
 BURLBurlington Stores Inc. COM | 0.76% | 0.76% | 0.76% |
Frequently Asked Questions
How much do IJK and MDYG overlap?
IJK and MDYG overlap by 86.9% of portfolio weight. They share 234 holdings (IJK holds 242 positions and MDYG holds 245), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IJK and MDYG?
The two portfolios are 86.9% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of IJK and MDYG?
The largest positions held by both funds are FTI, CW, XPO, ATI and UTHR. Together the top 10 shared positions account for 14% of the total overlap.
What does IJK own that MDYG doesn't?
8 positions (4.7% of IJK) are unique to IJK, led by CASY, FLEX and 28T. In the other direction, 11 positions (6.4% of MDYG) are unique to MDYG.