Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5526
Rapid7
RPD
$741M
| $101K | ﹤0.01% |
+12,488
| New | +$82.8K |
|
5527
Aspen Aerogels
ASPN
$408M
| $101K | ﹤0.01% |
15,952
+13,578
| +572% | +$66.6K |
|
|
CTO
5528
CALL
CTO Realty Growth
CTO
$806M
| $101K | ﹤0.01% |
4,700
+700
| +18% | +$14.2K |
|
5529
PUT
TransUnion
TRU
$15.3B
| $101K | ﹤0.01% |
1,400
-12,400
| -90% | -$869K |
|
|
OPTU
5530
Optimum Communications Inc
OPTU
$401M
| $101K | ﹤0.01% |
+69,646
| New | +$86.6K |
|
5531
PUT
Enviri
NVRI
$645M
| $101K | ﹤0.01% |
4,600
-8,200
| -64% | -$164K |
|
5532
CALL
CareTrust REIT
CTRE
$9.22B
| $101K | ﹤0.01% |
2,500
-11,400
| -82% | -$448K |
|
5533
Velocity Financial
VEL
$728M
| $101K | ﹤0.01% |
+5,453
| New | +$99.2K |
|
5534
CALL
Unisys
UIS
$191M
| $101K | ﹤0.01% |
27,500
+22,300
| +429% | +$70K |
|
5535
Adecoagro
AGRO
$1.7B
| $100K | ﹤0.01% |
10,493
-48,188
| -82% | -$607K |
|
|
DDL
5536
CALL
Dingdong
DDL
$494M
| $100K | ﹤0.01% |
51,900
-100,300
| -66% | -$249K |
|
5537
PUT
Elicio Therapeutics
ELTX
$63.3M
| $100K | ﹤0.01% |
25,600
+4,000
| +19% | +$40.2K |
|
5538
CALL
Corpay
CPAY
$27.3B
| $100K | ﹤0.01% |
300
+200
| +200% | +$66.4K |
|
5539
Jack in the Box
JACK
$310M
| $99.9K | ﹤0.01% |
+6,319
| New | +$77.9K |
|
5540
CALL
SouthState Bank Corp
SSB
$10.5B
| $99.9K | ﹤0.01% |
+1,000
| New | +$96.4K |
|
5541
AvePoint
AVPT
$2.84B
| $99.8K | ﹤0.01% |
8,902
+3,746
| +73% | +$38.5K |
|
5542
Triple Flag Precious Metals
TFPM
$6.99B
| $99.8K | ﹤0.01% |
3,329
-8,855
| -73% | -$285K |
|
5543
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.69B
| $99.6K | ﹤0.01% |
+500
| New | +$67.5K |
|
|
NVTX
5544
Tradr 2X Long NVTS Daily ETF
NVTX
$43.5M
| $99.6K | ﹤0.01% |
+2,047
| New | +$157K |
|
|
TIC
5545
CALL
TIC Solutions Inc
TIC
$2.04B
| $99.5K | ﹤0.01% |
12,300
-33,000
| -73% | -$278K |
|
5546
PUT
Mitsubishi UFJ Financial
MUFG
$271B
| $99.5K | ﹤0.01% |
5,000
-100
| -2% | -$1.88K |
|
|
TALK
5547
PUT
DELISTED
Talkspace
TALK
| $99.3K | ﹤0.01% |
19,100
+17,300
| +961% | +$89.8K |
|
|
TWO
5548
CALL
DELISTED
Two Harbors Investment
TWO
| $99.3K | ﹤0.01% |
8,000
+2,600
| +48% | +$31.1K |
|
5549
CALL
Amtech Systems
ASYS
$262M
| $99.2K | ﹤0.01% |
4,300
+3,100
| +258% | +$58.9K |
|
|
LGO
5550
CALL
Largo
LGO
$73.2M
| $99.2K | ﹤0.01% |
156,500
-75,600
| -33% | -$77.9K |
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.