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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 | |
|---|---|---|---|---|---|---|---|
3326
CALL
Gen Digital
GEN
$17.6B
| $608K | ﹤0.01% |
27,600
-36,500
| -57% | -$1.01M |
2025 Q4
3 quarters
|
|
3327
PUT
Copa Holdings
CPA
$5.83B
| $607K | ﹤0.01% |
4,600
-600
| -12% | -$82K |
2023 Q1
14 quarters
|
|
3328
PUT
SGHC Ltd
SGHC
$5.8B
| $606K | ﹤0.01% |
53,400
+52,300
| +4,755% | +$717K |
2025 Q3
4 quarters
|
|
3329
Sprott Silver Miners & Physical Silver ETF
SLVR
$572M
| $605K | ﹤0.01% |
11,106
-8,502
| -43% | -$477K |
2025 Q2
5 quarters
|
|
3330
PUT
Ardmore Shipping
ASC
$777M
| $605K | ﹤0.01% |
32,400
+24,800
| +326% | +$427K |
2020 Q2
25 quarters
|
|
3331
CALL
Emergent Biosolutions
EBS
$303M
| $604K | ﹤0.01% |
91,500
+5,000
| +6% | +$32.8K |
2021 Q1
22 quarters
|
|
3332
CALL
Ralph Lauren
RL
$23.1B
| $604K | ﹤0.01% |
1,700
+400
| +31% | +$147K |
2014 Q4
47 quarters
|
|
3333
PUT
Lightwave Logic
LWLG
$523M
| $603K | ﹤0.01% |
120,600
-96,200
| -44% | -$595K |
2021 Q4
19 quarters
|
|
3334
Commault Systems
CVLT
$6.8B
| $603K | ﹤0.01% |
4,022
+514
| +15% | +$72.1K |
2026 Q2
1 quarter
|
|
|
IOND
3335
PUT
Ionic Digital Inc
IOND
$2.91B
| $602K | ﹤0.01% |
+7,500
| New | +$548K |
2026 Q3
0 quarters
|
|
3336
PUT
Supernus, Inc. Common Stock
SUPN
$6.07B
| $602K | ﹤0.01% |
16,800
+500
| +3% | +$18.9K |
2024 Q2
9 quarters
|
|
3337
CALL
Black Stone Minerals
BSM
$2.99B
| $601K | ﹤0.01% |
42,000
-11,700
| -22% | -$170K |
2018 Q3
32 quarters
|
|
3338
PUT
Spire Global
SPIR
$364M
| $600K | ﹤0.01% |
53,700
+42,300
| +371% | +$550K |
2023 Q3
12 quarters
|
|
3339
CALL
Target Hospitality
TH
$1.17B
| $599K | ﹤0.01% |
30,400
+21,400
| +238% | +$382K |
2021 Q4
19 quarters
|
|
3340
CALL
Northern Dynasty Minerals
NAK
$340M
| $599K | ﹤0.01% |
437,300
-191,600
| -30% | -$303K |
2026 Q1
2 quarters
|
|
3341
CALL
Liberty Energy
LBRT
$2.11B
| $598K | ﹤0.01% |
32,800
-2,700
| -8% | -$55.8K |
2019 Q4
27 quarters
|
|
3342
PUT
Alpha Architect US Quantitative Value ETF
QVAL
$727M
| $597K | ﹤0.01% |
5,100
+4,900
| +2,450% | +$291K |
2025 Q4
3 quarters
|
|
3343
CALL
StubHub Holdings
STUB
$1.93B
| $597K | ﹤0.01% |
106,900
-731,000
| -87% | -$5.8M |
2025 Q3
4 quarters
|
|
3344
PUT
Range Resources
RRC
$12B
| $596K | ﹤0.01% |
16,100
-1,000
| -6% | -$39.3K |
2014 Q4
47 quarters
|
|
3345
FundStrat Granny Shots US Large Cap ETF
GRNY
$4.2B
| $596K | ﹤0.01% |
21,400
-12,497
| -37% | -$346K |
2026 Q2
1 quarter
|
|
3346
Teucrium Sugar Fund
CANE
$50.6M
| $596K | ﹤0.01% |
52,891
-123,870
| -70% | -$1.32M |
2025 Q1
6 quarters
|
|
3347
CALL
MannKind Corp
MNKD
$1.34B
| $595K | ﹤0.01% |
152,500
-30,600
| -17% | -$120K |
2021 Q2
21 quarters
|
|
3348
CALL
Red Rock Resorts
RRR
$2.93B
| $594K | ﹤0.01% |
12,000
-800
| -6% | -$47.8K |
2017 Q4
35 quarters
|
|
3349
CALL
Open Text
OTEX
$5.99B
| $594K | ﹤0.01% |
26,500
-39,200
| -60% | -$931K |
2015 Q3
44 quarters
|
|
3350
Evergy
EVRG
$20.7B
| $592K | ﹤0.01% |
7,550
+7,531
| +39,637% | +$624K |
2026 Q2
1 quarter
|
|
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.