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Simplex Trading Portfolio holdings
AUM
$184B
Turnover
28.44%
1-Year Est. Return
51.71%
Simplex Trading is a market maker that trades for its own account, mainly in US stock options and options on futures, using software it builds itself. Its work pairs software developers with data-driven traders. It was founded in Chicago in 2004, and Erik Swanson, who joined straight out of college as a trader, has been its chief executive since 2014. It also invests in early-stage financial and technology start-ups.
This Fund
S&P 500
This Quarter Est. Return
-0.22%
1 Year Est. Return
+51.71%
3 Year Est. Return
+194.66%
5 Year Est. Return
+164.83%
10 Year Est. Return
+968.67%
AUM
$184B
AUM Growth
+$13.3B
(+7.8%)
Cap. Flow
-$519M
Cap. Flow % of AUM
Cap. Flow %
-0.28%
Top 10 Holdings %
Top 10 Hldgs %
50.68%
Holding
10,644
New
1,493
Increased
3,697
Reduced
3,633
Closed
1,534
Avg Time Held
Equity + Options
3
years
Top 10 Avg Time Held
Equity + Options
3.9
years
Top 20 Avg Time Held
Equity + Options
4.3
years
Avg Time Held Equity only
0.5
years
Top 10 Avg Time Held Equity only
0.5
years
Top 20 Avg Time Held Equity only
0.4
years
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$92.6M |
| 2 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$80.6M |
| 3 |
Amazon
AMZN
|
+$26.3M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$25.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$20.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class A
GOOGL
|
+$128M |
| 2 |
NVIDIA
NVDA
|
+$97.8M |
| 3 |
Tesla
TSLA
|
+$53.9M |
| 4 |
Micron Technology
MU
|
+$50M |
| 5 |
United States Oil Fund
USO
|
+$49.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.84% |
| 2 | Technology | 0.45% |
| 3 | Consumer Discretionary | 0.14% |
| 4 | Healthcare | 0.14% |
| 5 | Financials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
3301
CALL
Matsons
MATX
$6.3B
| $615K | ﹤0.01% |
2,800
+1,800
| +180% | +$391K |
2026 Q2
1 quarter
|
|
3302
PUT
PVH
PVH
$4.28B
| $615K | ﹤0.01% |
8,300
-77,000
| -90% | -$6.01M |
2021 Q2
21 quarters
|
|
3303
ICICI Bank
IBN
$123B
| $615K | ﹤0.01% |
22,305
+5,761
| +35% | +$169K |
2025 Q3
4 quarters
|
|
3304
PUT
RELX
RELX
$69.5B
| $614K | ﹤0.01% |
18,500
-11,100
| -38% | -$383K |
2025 Q2
5 quarters
|
|
3305
CALL
Americold
COLD
$4.54B
| $614K | ﹤0.01% |
43,900
-3,700
| -8% | -$55.1K |
2020 Q1
26 quarters
|
|
3306
CALL
MediaAlpha
MAX
$877M
| $613K | ﹤0.01% |
64,100
+46,500
| +264% | +$580K |
2026 Q1
2 quarters
|
|
3307
Morgan Stanley
MS
$296B
| $613K | ﹤0.01% |
+3,260
| New | +$693K |
2026 Q3
0 quarters
|
|
3308
PUT
Newmark Group
NMRK
$1.97B
| $613K | ﹤0.01% |
50,000
+27,500
| +122% | +$411K |
2026 Q1
2 quarters
|
|
3309
CALL
Hess Midstream
HESM
$3.92B
| $613K | ﹤0.01% |
16,400
+11,300
| +222% | +$448K |
2020 Q4
23 quarters
|
|
3310
CALL
Array Technologies
ARRY
$740M
| $613K | ﹤0.01% |
152,000
-226,000
| -60% | -$1.16M |
2020 Q4
23 quarters
|
|
3311
Labcorp
LH
$30.2B
| $613K | ﹤0.01% |
1,988
+1,693
| +574% | +$525K |
2025 Q2
5 quarters
|
|
3312
CALL
Aaon
AAON
$6.5B
| $612K | ﹤0.01% |
7,400
+7,000
| +1,750% | +$630K |
2023 Q1
14 quarters
|
|
3313
ProShares VIX Short-Term Futures ETF
VIXY
$175M
| $612K | ﹤0.01% |
36,136
+16,942
| +88% | +$322K |
2024 Q4
7 quarters
|
|
3314
Navigator Holdings
NVGS
$1.3B
| $611K | ﹤0.01% |
26,376
+10,401
| +65% | +$228K |
2026 Q1
2 quarters
|
|
3315
iShares Preferred and Income Securities ETF
PFF
$11.4B
| $611K | ﹤0.01% |
20,714
+19,195
| +1,264% | +$582K |
2026 Q2
1 quarter
|
|
3316
CALL
Impact Shares Womens Empowerment ETF Trading
WOMN
$58.4M
| $611K | ﹤0.01% |
8,700
+7,800
| +867% | +$346K |
2025 Q3
4 quarters
|
|
3317
CALL
Vital Farms
VITL
$385M
| $611K | ﹤0.01% |
65,800
+9,400
| +17% | +$109K |
2020 Q3
24 quarters
|
|
3318
Avnet
AVT
$7.04B
| $610K | ﹤0.01% |
6,106
+3,486
| +133% | +$319K |
2026 Q2
1 quarter
|
|
3319
PUT
Kyndryl
KD
$3.72B
| $610K | ﹤0.01% |
54,200
+15,200
| +39% | +$193K |
2021 Q4
19 quarters
|
|
3320
PUT
Franklin Templeton
BEN
$18.4B
| $610K | ﹤0.01% |
19,000
+1,800
| +10% | +$60.5K |
2014 Q4
47 quarters
|
|
3321
PUT
Methanex
MEOH
$5.42B
| $610K | ﹤0.01% |
10,400
-15,600
| -60% | -$876K |
2015 Q4
43 quarters
|
|
3322
CALL
FIGS
FIGS
$3.76B
| $610K | ﹤0.01% |
44,000
-101,000
| -70% | -$1.26M |
2021 Q2
21 quarters
|
|
3323
CALL
Harrow
HROW
$1.06B
| $610K | ﹤0.01% |
19,800
-2,200
| -10% | -$85.7K |
2020 Q2
25 quarters
|
|
3324
Sundial Growers
SNDL
$340M
| $609K | ﹤0.01% |
471,990
+29,313
| +7% | +$38.6K |
2020 Q4
23 quarters
|
|
3325
CALL
Nano Dimension
NNDM
$250M
| $608K | ﹤0.01% |
387,300
-12,900
| -3% | -$19.9K |
2020 Q4
23 quarters
|
|
Similar funds
Simplex Trading's Q3 2026 Portfolio in Review
As of Q3 2026, Simplex Trading held 10,644 positions worth $184B, up 7.8% from $171B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q3 2026 filing shows 1,493 new, 3,697 increased, 3,633 reduced and 1,534 closed positions. Its largest new stake was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M. The largest sale was Alphabet (Google) Class A, an estimated $128M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q3 2026 buy was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q3 2026, an estimated $92.6M increase.
- Simplex Trading's biggest Q3 2026 reduction was NVIDIA, cutting an estimated $97.8M.
- Simplex Trading fully exited Alphabet (Google) Class A in Q3 2026, selling an estimated $128M.
- Simplex Trading's ten largest holdings make up 51% of its $184B portfolio in Q3 2026.
- Simplex Trading opened 1,493 new positions and closed 1,534 in Q3 2026.
- Simplex Trading's portfolio value rose 7.8% quarter-over-quarter to $184B.
Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.