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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 | |
|---|---|---|---|---|---|---|---|
2851
VF Corp
VFC
$7.88B
| $896K | ﹤0.01% |
63,701
+40,733
| +177% | +$603K |
2023 Q2
13 quarters
|
|
2852
Amdocs
DOX
$4.61B
| $895K | ﹤0.01% |
15,654
-9,883
| -39% | -$567K |
2025 Q3
4 quarters
|
|
2853
Invesco S&P 500 Low Volatility ETF
SPLV
$7.54B
| $895K | ﹤0.01% |
12,694
+10,743
| +551% | +$806K |
2026 Q2
1 quarter
|
|
2854
CALL
Unum
UNM
$12.3B
| $895K | ﹤0.01% |
10,200
+1,300
| +15% | +$118K |
2017 Q3
36 quarters
|
|
2855
CALL
Bank OZK
OZK
$5.44B
| $892K | ﹤0.01% |
19,400
+10,600
| +120% | +$529K |
2018 Q2
33 quarters
|
|
2856
PUT
Helmerich & Payne
HP
$3.71B
| $891K | ﹤0.01% |
24,000
+11,500
| +92% | +$446K |
2014 Q4
47 quarters
|
|
2857
PUT
Fifth Third Bancorp
FITB
$48.7B
| $890K | ﹤0.01% |
17,600
+4,500
| +34% | +$250K |
2015 Q3
44 quarters
|
|
2858
PUT
Sigma Lithium
SGML
$564M
| $890K | ﹤0.01% |
94,700
+2,200
| +2% | +$24K |
2022 Q3
16 quarters
|
|
2859
Coinbase
COIN
$34.6B
| $890K | ﹤0.01% |
4,775
-124,724
| -96% | -$21.2M |
2026 Q2
1 quarter
|
|
2860
CALL
Sable Offshore Corp
SOC
$129M
| $890K | ﹤0.01% |
257,200
-173,700
| -40% | -$775K |
2024 Q3
8 quarters
|
|
2861
Molson Coors Class B
TAP
$7.33B
| $890K | ﹤0.01% |
+24,401
| New | +$981K |
2026 Q3
0 quarters
|
|
|
DENT
2862
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $890K | ﹤0.01% |
199,100
-184,000
| -48% | -$822K |
2019 Q2
29 quarters
|
|
2863
CALL
Enlight Renewable Energy
ENLT
$9.41B
| $888K | ﹤0.01% |
12,800
+6,500
| +103% | +$526K |
2026 Q1
2 quarters
|
|
2864
CALL
O-I Glass
OI
$751M
| $888K | ﹤0.01% |
157,200
+74,100
| +89% | +$557K |
2016 Q1
42 quarters
|
|
2865
PUT
A2Z Smart Technologies
AZ
$275M
| $887K | ﹤0.01% |
154,200
+37,200
| +32% | +$226K |
2026 Q1
2 quarters
|
|
2866
CALL
Old Dominion Freight Line
ODFL
$35.4B
| $887K | ﹤0.01% |
5,100
+700
| +16% | +$143K |
2026 Q1
2 quarters
|
|
2867
CALL
Personalis
PSNL
$1.72B
| $886K | ﹤0.01% |
54,400
+34,600
| +175% | +$521K |
2024 Q3
8 quarters
|
|
2868
CALL
Quantum Corp
QMCO
$658M
| $885K | ﹤0.01% |
27,900
-41,600
| -60% | -$775K |
2026 Q2
1 quarter
|
|
2869
CALL
Invitation Homes
INVH
$15.4B
| $885K | ﹤0.01% |
33,600
+1,400
| +4% | +$40.8K |
2017 Q2
37 quarters
|
|
2870
Home Depot
HD
$347B
| $884K | ﹤0.01% |
3,109
-85
| -3% | -$27.9K |
2025 Q4
3 quarters
|
|
2871
PUT
Lloyds Banking Group
LYG
$73.7B
| $884K | ﹤0.01% |
157,100
-24,500
| -13% | -$147K |
2019 Q2
29 quarters
|
|
2872
Teradyne
TER
$41.2B
| $884K | ﹤0.01% |
2,206
-1,200
| -35% | -$443K |
2025 Q4
3 quarters
|
|
2873
CALL
Regal Rexnord
RRX
$12B
| $884K | ﹤0.01% |
5,700
+5,200
| +1,040% | +$939K |
2021 Q4
19 quarters
|
|
2874
PUT
Builders FirstSource
BLDR
$6.47B
| $884K | ﹤0.01% |
15,500
+4,600
| +42% | +$316K |
2018 Q1
34 quarters
|
|
2875
CALL
REalloys Inc
ALOY
$440M
| $883K | ﹤0.01% |
108,100
+99,500
| +1,157% | +$1.03M |
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.