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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 | |
|---|---|---|---|---|---|---|---|
376
CALL
Agnico Eagle Mines
AEM
$96.7B
| $27.7M | 0.02% |
150,900
+62,100
| +70% | +$11M |
2021 Q2
21 quarters
|
|
377
CALL
lululemon athletica
LULU
$12.8B
| $27.6M | 0.02% |
287,200
-40,400
| -12% | -$4.59M |
2014 Q4
47 quarters
|
|
378
CALL
Comcast
CMCSA
$88.8B
| $27.5M | 0.01% |
1,262,500
-178,400
| -12% | -$4.37M |
2016 Q1
42 quarters
|
|
379
PUT
Chipotle Mexican Grill
CMG
$45.5B
| $27.3M | 0.01% |
853,500
+409,600
| +92% | +$14.2M |
2021 Q2
21 quarters
|
|
380
CALL
Rigetti Computing
RGTI
$4.05B
| $27.2M | 0.01% |
1,729,500
+585,200
| +51% | +$9.44M |
2022 Q4
15 quarters
|
|
|
381
PUT
lululemon athletica
LULU
$12.8B
| $27.2M | 0.01% |
282,500
+29,800
| +12% | +$3.38M |
2014 Q4
47 quarters
|
|
382
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$104M
| $27.1M | 0.01% |
829,400
+86,700
| +12% | +$3.38M |
2015 Q1
46 quarters
|
|
383
CALL
ProShares UltraPro Short QQQ
SQQQ
$1.95B
| $27.1M | 0.01% |
778,800
+27,600
| +4% | +$1.08M |
2025 Q4
3 quarters
|
|
384
CALL
RTX Corp
RTX
$271B
| $27M | 0.01% |
145,700
-22,000
| -13% | -$4.5M |
2020 Q1
26 quarters
|
|
385
CALL
AT&T
T
$147B
| $26.9M | 0.01% |
1,100,800
-644,400
| -37% | -$15.5M |
2014 Q4
47 quarters
|
|
386
PUT
Intuit
INTU
$89.9B
| $26.9M | 0.01% |
97,400
+31,900
| +49% | +$10M |
2014 Q4
47 quarters
|
|
387
CALL
Constellation Energy
CEG
$94.3B
| $26.7M | 0.01% |
105,000
-37,400
| -26% | -$10M |
2022 Q1
18 quarters
|
|
388
PUT
CVS Health
CVS
$113B
| $26.5M | 0.01% |
309,700
+29,400
| +10% | +$2.88M |
2021 Q1
22 quarters
|
|
389
CALL
ConocoPhillips
COP
$161B
| $26.4M | 0.01% |
210,900
-85,900
| -29% | -$10.6M |
2021 Q2
21 quarters
|
|
390
PUT
BitMine Immersion Technologies
BMNR
$10.7B
| $26.3M | 0.01% |
994,800
+285,100
| +40% | +$5.89M |
2026 Q1
2 quarters
|
|
391
CALL
Spotify
SPOT
$123B
| $26M | 0.01% |
53,400
+11,500
| +27% | +$5.85M |
2018 Q2
33 quarters
|
|
392
PUT
T-Mobile US
TMUS
$178B
| $26M | 0.01% |
159,400
+7,000
| +5% | +$1.25M |
2021 Q2
21 quarters
|
|
393
CALL
DoorDash
DASH
$76.7B
| $25.7M | 0.01% |
140,000
+60,200
| +75% | +$12.2M |
2020 Q4
23 quarters
|
|
394
CALL
Altria Group
MO
$127B
| $25.7M | 0.01% |
381,600
+144,000
| +61% | +$10M |
2014 Q4
47 quarters
|
|
395
PUT
Baidu
BIDU
$27B
| $25.6M | 0.01% |
295,000
+45,600
| +18% | +$4.61M |
2015 Q1
46 quarters
|
|
396
CALL
Gilead Sciences
GILD
$211B
| $25.6M | 0.01% |
171,800
-55,700
| -24% | -$7.82M |
2021 Q2
21 quarters
|
|
397
Cigna
CI
$79.5B
| $25.6M | 0.01% |
94,149
+60,825
| +183% | +$17.1M |
2023 Q1
14 quarters
|
|
398
CALL
Hims & Hers Health
HIMS
$4.39B
| $25.5M | 0.01% |
857,300
+88,800
| +12% | +$2.73M |
2021 Q1
22 quarters
|
|
399
CALL
Oscar Health
OSCR
$10.3B
| $25.3M | 0.01% |
821,900
-46,000
| -5% | -$1.41M |
2021 Q1
22 quarters
|
|
400
CALL
Intuitive Surgical
ISRG
$156B
| $25.2M | 0.01% |
62,000
-40,800
| -40% | -$15.6M |
2014 Q4
47 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.