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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 | |
|---|---|---|---|---|---|---|---|
2576
PUT
Regal Rexnord
RRX
$12.2B
| $1.15M | ﹤0.01% |
7,400
+900
| +14% | +$162K |
2026 Q1
2 quarters
|
|
2577
PUT
Bitwise Bitcoin ETF
BITB
$2.76B
| $1.15M | ﹤0.01% |
25,300
+19,200
| +315% | +$742K |
2024 Q4
7 quarters
|
|
2578
American Electric Power
AEP
$70.4B
| $1.15M | ﹤0.01% |
+9,663
| New | +$1.22M |
2026 Q3
0 quarters
|
|
2579
Uniti Group
UNIT
$988M
| $1.15M | ﹤0.01% |
136,732
+80,311
| +142% | +$808K |
2025 Q1
6 quarters
|
|
2580
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$44.1M
| $1.15M | ﹤0.01% |
91,400
-6,700
| -7% | -$177K |
2023 Q2
13 quarters
|
|
2581
PUT
Yum! Brands
YUM
$43B
| $1.15M | ﹤0.01% |
8,400
+6,500
| +342% | +$972K |
2021 Q1
22 quarters
|
|
2582
PUT
Adient
ADNT
$1.2B
| $1.14M | ﹤0.01% |
67,900
+46,400
| +216% | +$894K |
2021 Q2
21 quarters
|
|
2583
CALL
Vera Therapeutics
VERA
$2.2B
| $1.14M | ﹤0.01% |
35,400
+22,900
| +183% | +$801K |
2023 Q2
13 quarters
|
|
2584
Alnylam Pharmaceuticals
ALNY
$21.4B
| $1.14M | ﹤0.01% |
4,628
-6,939
| -60% | -$1.77M |
2026 Q2
1 quarter
|
|
2585
Direxion Daily META Bull 2X ETF
METU
$335M
| $1.14M | ﹤0.01% |
37,269
+490
| +1% | +$11.7K |
2025 Q4
3 quarters
|
|
2586
CALL
Ascendis Pharma A/S
ASND
$17.1B
| $1.14M | ﹤0.01% |
5,000
-2,800
| -36% | -$709K |
2018 Q2
33 quarters
|
|
2587
CALL
Vanguard Total International Stock ETF
VXUS
$163B
| $1.14M | ﹤0.01% |
13,400
+10,200
| +319% | +$877K |
2021 Q1
22 quarters
|
|
2588
CALL
Forward Air
FWRD
$582M
| $1.14M | ﹤0.01% |
74,600
-31,900
| -30% | -$505K |
2023 Q3
12 quarters
|
|
2589
PACS Group
PACS
$7.95B
| $1.14M | ﹤0.01% |
27,335
+12,270
| +81% | +$543K |
2026 Q1
2 quarters
|
|
2590
CALL
Mitsubishi UFJ Financial
MUFG
$247B
| $1.14M | ﹤0.01% |
49,200
+48,000
| +4,000% | +$1.08M |
2026 Q1
2 quarters
|
|
2591
Coherent
COHR
$46.2B
| $1.13M | ﹤0.01% |
3,941
-22,841
| -85% | -$6.86M |
2025 Q3
4 quarters
|
|
2592
CALL
Blackstone Mortgage Trust
BXMT
$1.83B
| $1.13M | ﹤0.01% |
98,900
-13,800
| -12% | -$203K |
2021 Q2
21 quarters
|
|
2593
PUT
Harmony Gold Mining
HMY
$10.1B
| $1.13M | ﹤0.01% |
63,900
+800
| +1% | +$14.6K |
2019 Q3
28 quarters
|
|
2594
Copart
CPRT
$29.8B
| $1.13M | ﹤0.01% |
+41,461
| New | +$1.24M |
2026 Q3
0 quarters
|
|
2595
PUT
Almonty Industries
ALM
$2.35B
| $1.13M | ﹤0.01% |
85,800
+26,600
| +45% | +$400K |
2026 Q1
2 quarters
|
|
2596
PUT
ADT
ADT
$7.25B
| $1.13M | ﹤0.01% |
185,600
-400
| -0.2% | -$2.84K |
2018 Q1
34 quarters
|
|
2597
Flex
FLEX
$29.2B
| $1.13M | ﹤0.01% |
+10,258
| New | +$1.21M |
2026 Q3
0 quarters
|
|
2598
CALL
Yeti Holdings
YETI
$3.12B
| $1.13M | ﹤0.01% |
27,500
-300
| -1% | -$13.8K |
2021 Q1
22 quarters
|
|
2599
PUT
Tradr 2X Long SPY Quarterly ETF
SPYQ
$12.7M
| $1.13M | ﹤0.01% |
45,100
+14,200
| +46% | +$2.72M |
2026 Q1
2 quarters
|
|
2600
CALL
Gaming and Leisure Properties
GLPI
$11.4B
| $1.13M | ﹤0.01% |
29,700
+2,700
| +10% | +$115K |
2018 Q1
34 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.