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 | |
|---|---|---|---|---|---|---|---|
2476
CALL
JBS N.V.
JBS
$13.3B
| $1.25M | ﹤0.01% |
110,900
-455,000
| -80% | -$5.82M |
2025 Q2
5 quarters
|
|
2477
CALL
ServiceTitan Inc
TTAN
$7.89B
| $1.25M | ﹤0.01% |
19,000
-4,000
| -17% | -$313K |
2024 Q4
7 quarters
|
|
2478
CALL
Tyson Foods
TSN
$21.1B
| $1.25M | ﹤0.01% |
24,700
+5,500
| +29% | +$308K |
2014 Q4
47 quarters
|
|
2479
CALL
NewAmsterdam Pharma
NAMS
$2.48B
| $1.25M | ﹤0.01% |
51,300
+9,100
| +22% | +$252K |
2024 Q2
9 quarters
|
|
2480
Ramaco Resources Class A
METC
$461M
| $1.25M | ﹤0.01% |
150,700
+6,708
| +5% | +$75.3K |
2025 Q2
5 quarters
|
|
2481
PUT
OneMain Financial
OMF
$6.34B
| $1.25M | ﹤0.01% |
22,500
+600
| +3% | +$37K |
2021 Q2
21 quarters
|
|
2482
CALL
Sky Harbour Group
SKYH
$446M
| $1.24M | ﹤0.01% |
131,300
+21,100
| +19% | +$218K |
2026 Q1
2 quarters
|
|
2483
PUT
Defiance Daily Target 2X Long RGTI ETF
RGTX
$19.3M
| $1.24M | ﹤0.01% |
77,500
+47,900
| +162% | +$536K |
2026 Q1
2 quarters
|
|
2484
CALL
T-REX 2X Inverse DRAM Daily Target ETF
RAMZ
$191K
| $1.24M | ﹤0.01% |
+89,400
| New | +$1.59M |
2026 Q3
0 quarters
|
|
2485
Steven Madden
SHOO
$3.13B
| $1.24M | ﹤0.01% |
27,685
+25,558
| +1,202% | +$1.13M |
2026 Q1
2 quarters
|
|
2486
CALL
Millrose Properties Inc
MRP
$4.32B
| $1.24M | ﹤0.01% |
47,700
-2,300
| -5% | -$67.1K |
2025 Q1
6 quarters
|
|
2487
Genius Sports
GENI
$1.71B
| $1.24M | ﹤0.01% |
216,129
+7,354
| +4% | +$51.4K |
2026 Q2
1 quarter
|
|
2488
PUT
Teck Resources
TECK
$31.3B
| $1.24M | ﹤0.01% |
18,800
+6,100
| +48% | +$390K |
2014 Q4
47 quarters
|
|
2489
PUT
Nasdaq
NDAQ
$60.9B
| $1.23M | ﹤0.01% |
13,400
-22,400
| -63% | -$2.09M |
2021 Q2
21 quarters
|
|
2490
McCormick & Company Non-Voting
MKC
$12.6B
| $1.23M | ﹤0.01% |
26,559
-43,528
| -62% | -$2.26M |
2025 Q1
6 quarters
|
|
2491
CALL
Sezzle
SEZL
$5.16B
| $1.23M | ﹤0.01% |
11,400
+600
| +6% | +$83.7K |
2025 Q2
5 quarters
|
|
2492
Quanta Services
PWR
$91.6B
| $1.23M | ﹤0.01% |
1,916
-2,584
| -57% | -$1.67M |
2026 Q2
1 quarter
|
|
2493
Allegion
ALLE
$16.2B
| $1.23M | ﹤0.01% |
8,005
+6,701
| +514% | +$1.03M |
2025 Q2
5 quarters
|
|
2494
CALL
ADMA Biologics
ADMA
$2.93B
| $1.23M | ﹤0.01% |
122,700
-57,600
| -32% | -$533K |
2019 Q1
30 quarters
|
|
2495
CALL
St. Joe Company
JOE
$4.06B
| $1.23M | ﹤0.01% |
18,700
+15,500
| +484% | +$1M |
2019 Q2
29 quarters
|
|
2496
CALL
CEVA Inc
CEVA
$769M
| $1.23M | ﹤0.01% |
34,700
+25,300
| +269% | +$852K |
2026 Q1
2 quarters
|
|
2497
PUT
Rexford Industrial Realty
REXR
$8.03B
| $1.23M | ﹤0.01% |
33,800
-8,300
| -20% | -$307K |
2022 Q3
16 quarters
|
|
2498
Medline Inc
MDLN
$37B
| $1.23M | ﹤0.01% |
+35,327
| New | +$1.29M |
2026 Q3
0 quarters
|
|
2499
Corgi Lithography & Semiconductor Photonics ETF
EUV
$370M
| $1.23M | ﹤0.01% |
48,491
+9,063
| +23% | +$224K |
2026 Q2
1 quarter
|
|
2500
PUT
Sanmina
SANM
$8.54B
| $1.22M | ﹤0.01% |
5,700
+3,500
| +159% | +$713K |
2025 Q3
4 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.