We are live on !
Find out more
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 | |
|---|---|---|---|---|---|---|---|
3626
The GEO Group
GEO
$4.1B
| $475K | ﹤0.01% |
+15,580
| New | +$482K |
2026 Q3
0 quarters
|
|
3627
CALL
Tuttle Capital Space Industry Income Blast ETF
SPCI
$7.74M
| $473K | ﹤0.01% |
+19,700
| New | +$445K |
2026 Q3
0 quarters
|
|
3628
PUT
Coca-Cola Consolidated
COKE
$13.9B
| $473K | ﹤0.01% |
2,500
-4,800
| -66% | -$905K |
2025 Q3
4 quarters
|
|
3629
CALL
Franklin International Core Dividend Tilt Index ETF
DIVI
$2.64B
| $473K | ﹤0.01% |
8,900
+6,600
| +287% | +$288K |
2024 Q3
8 quarters
|
|
3630
TransAlta
TAC
$4.15B
| $473K | ﹤0.01% |
39,145
-2,626
| -6% | -$33.3K |
2025 Q4
3 quarters
|
|
3631
CALL
American Battery Technology Co
ABAT
$157M
| $472K | ﹤0.01% |
213,500
-190,100
| -47% | -$465K |
2023 Q4
11 quarters
|
|
3632
CALL
DELISTED
CoinShares Bitcoin and Ether ETF
BTF
| $472K | ﹤0.01% |
10,500
+5,100
| +94% | +$99.3K |
2026 Q1
2 quarters
|
|
3633
PUT
FerroAtlántica
GSM
$576M
| $471K | ﹤0.01% |
118,500
+76,600
| +183% | +$298K |
2020 Q4
23 quarters
|
|
3634
Vita Coco
COCO
$3.7B
| $470K | ﹤0.01% |
8,213
+7,389
| +897% | +$469K |
2024 Q1
10 quarters
|
|
3635
CALL
Sigma Lithium
SGML
$579M
| $470K | ﹤0.01% |
50,000
-62,300
| -55% | -$679K |
2022 Q2
17 quarters
|
|
3636
PUT
Shattuck Labs
STTK
$460M
| $470K | ﹤0.01% |
68,900
+42,100
| +157% | +$292K |
2026 Q2
1 quarter
|
|
3637
CALL
Cal-Maine
CALM
$3.1B
| $470K | ﹤0.01% |
6,900
-19,600
| -74% | -$1.59M |
2021 Q2
21 quarters
|
|
3638
Dauch Corp
DCH
$1.11B
| $470K | ﹤0.01% |
89,944
+32,781
| +57% | +$195K |
2026 Q2
1 quarter
|
|
3639
Canadian Solar
CSIQ
$654M
| $469K | ﹤0.01% |
+40,719
| New | +$568K |
2026 Q3
0 quarters
|
|
3640
PUT
Corvus Pharmaceuticals
CRVS
$878M
| $469K | ﹤0.01% |
40,700
-65,700
| -62% | -$915K |
2020 Q4
23 quarters
|
|
3641
PUT
American Superconductor
AMSC
$1.16B
| $469K | ﹤0.01% |
16,100
-5,500
| -25% | -$172K |
2026 Q1
2 quarters
|
|
3642
PAR Technology
PAR
$917M
| $468K | ﹤0.01% |
+34,016
| New | +$587K |
2026 Q3
0 quarters
|
|
3643
PUT
Robinhood Ventures Fund I
RVI
$566M
| $468K | ﹤0.01% |
16,800
+11,300
| +205% | +$315K |
2026 Q2
1 quarter
|
|
3644
PUT
Genesis Energy
GEL
$1.54B
| $466K | ﹤0.01% |
33,900
-1,400
| -4% | -$21.3K |
2018 Q2
33 quarters
|
|
3645
CALL
Omada Health Inc
OMDA
$882M
| $466K | ﹤0.01% |
22,400
-57,600
| -72% | -$1.27M |
2025 Q4
3 quarters
|
|
3646
Fidelity National Financial
FNF
$11.6B
| $466K | ﹤0.01% |
+12,048
| New | +$573K |
2026 Q3
0 quarters
|
|
3647
CALL
Adtran
ADTN
$394M
| $465K | ﹤0.01% |
68,100
+16,000
| +31% | +$142K |
2024 Q1
10 quarters
|
|
3648
PUT
Grayscale Ethereum Staking ETF Shares
ETHE
$1.45B
| $465K | ﹤0.01% |
21,700
+3,900
| +22% | +$68.1K |
2026 Q1
2 quarters
|
|
3649
PUT
Lightpath Technologies
LPTH
$473M
| $465K | ﹤0.01% |
45,100
-203,900
| -82% | -$2.35M |
2025 Q3
4 quarters
|
|
3650
Vipshop
VIPS
$6.3B
| $464K | ﹤0.01% |
+37,092
| New | +$512K |
2026 Q3
0 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.