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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 | |
|---|---|---|---|---|---|---|---|
4326
CALL
Kodak
KODK
$804M
| $259K | ﹤0.01% |
27,100
-48,300
| -64% | -$437K |
2021 Q2
21 quarters
|
|
4327
EquipmentShare.com Inc
EQPT
$3.84B
| $259K | ﹤0.01% |
+14,909
| New | +$276K |
2026 Q3
0 quarters
|
|
4328
Brandywine Realty Trust
BDN
$519M
| $259K | ﹤0.01% |
92,485
+33,478
| +57% | +$102K |
2024 Q1
10 quarters
|
|
4329
Abacus Global Management
ABX
$852M
| $259K | ﹤0.01% |
32,125
+27,219
| +555% | +$267K |
2024 Q4
7 quarters
|
|
4330
iShares US Energy ETF
IYE
$1.81B
| $259K | ﹤0.01% |
+3,995
| New | +$256K |
2026 Q3
0 quarters
|
|
4331
Range Nuclear Renaissance Index ETF
NUKZ
$581M
| $259K | ﹤0.01% |
4,292
-10,229
| -70% | -$661K |
2026 Q1
2 quarters
|
|
4332
PUT
Vital Farms
VITL
$385M
| $258K | ﹤0.01% |
27,800
-9,000
| -24% | -$104K |
2022 Q3
16 quarters
|
|
4333
Quantum-Si Incorporated
QSI
$255M
| $258K | ﹤0.01% |
241,028
+75,735
| +46% | +$60.7K |
2024 Q3
8 quarters
|
|
4334
CALL
Gold Royalty Corp
GROY
$683M
| $258K | ﹤0.01% |
85,900
-7,300
| -8% | -$22K |
2021 Q4
19 quarters
|
|
4335
CALL
Sun Life Financial
SLF
$40.3B
| $257K | ﹤0.01% |
+3,300
| New | +$265K |
2026 Q3
0 quarters
|
|
4336
CALL
Midland States Bancorp
MSBI
$649M
| $257K | ﹤0.01% |
+8,000
| New | +$261K |
2026 Q3
0 quarters
|
|
4337
PUT
GraniteShares 2x Short SK Hynix Daily ETF
SKDD
$19.8M
| $257K | ﹤0.01% |
+9,600
| New | +$107K |
2026 Q3
0 quarters
|
|
4338
PUT
TAL Education Group
TAL
$5.68B
| $257K | ﹤0.01% |
21,300
| – | – |
2016 Q3
40 quarters
|
|
4339
CALL
Ocugen
OCGN
$279M
| $257K | ﹤0.01% |
249,600
-255,300
| -51% | -$325K |
2021 Q1
22 quarters
|
|
4340
Lightpath Technologies
LPTH
$473M
| $257K | ﹤0.01% |
24,893
-5,302
| -18% | -$61.2K |
2025 Q3
4 quarters
|
|
4341
PUT
Vanguard Dividend Appreciation ETF
VIG
$117B
| $257K | ﹤0.01% |
1,100
-300
| -21% | -$72.1K |
2017 Q2
37 quarters
|
|
4342
PUT
Draganfly
DPRO
$109M
| $257K | ﹤0.01% |
42,200
+600
| +1% | +$2.94K |
2025 Q3
4 quarters
|
|
4343
CALL
Riskified
RSKD
$1.23B
| $256K | ﹤0.01% |
32,400
+31,400
| +3,140% | +$186K |
2025 Q4
3 quarters
|
|
4344
PUT
DELISTED
CoinShares Bitcoin and Ether ETF
BTF
| $256K | ﹤0.01% |
5,700
+4,400
| +338% | +$85.7K |
2026 Q1
2 quarters
|
|
|
TGR
4345
CALL
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $256K | ﹤0.01% |
1,700
-7,200
| -81% | -$1.08M |
2015 Q3
44 quarters
|
|
4346
PUT
Vanguard Long-Term Tax-Exempt Bond ETF
VTEL
$359M
| $256K | ﹤0.01% |
5,400
+2,300
| +74% | +$233K |
2025 Q2
5 quarters
|
|
4347
Voyager Technologies
VOYG
$1.66B
| $256K | ﹤0.01% |
8,454
+5,587
| +195% | +$186K |
2026 Q2
1 quarter
|
|
4348
PUT
Aya Gold & Silver Inc
AYA
$3.38B
| $256K | ﹤0.01% |
+9,500
| New | +$234K |
2026 Q3
0 quarters
|
|
4349
Mirum Pharmaceuticals
MIRM
$6.04B
| $255K | ﹤0.01% |
2,989
+2,454
| +459% | +$256K |
2026 Q1
2 quarters
|
|
4350
PUT
Chemours
CC
$1.97B
| $255K | ﹤0.01% |
18,800
+3,500
| +23% | +$56.3K |
2015 Q3
44 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.