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 | |
|---|---|---|---|---|---|---|
2601
CALL
Brink's
BCO
$4.4B
| $1.18M | ﹤0.01% |
+12,500
| New | +$1.3M |
|
2602
CALL
Winnebago Industries
WGO
$768M
| $1.18M | ﹤0.01% |
37,800
+35,200
| +1,354% | +$1.07M |
|
2603
CALL
H&R Block
HRB
$5.2B
| $1.18M | ﹤0.01% |
31,000
+22,900
| +283% | +$798K |
|
2604
CALL
Atlanta Braves Holdings Series B
BATRK
$3.48B
| $1.18M | ﹤0.01% |
22,100
+1,900
| +9% | +$93.2K |
|
2605
CALL
Annexon
ANNX
$690M
| $1.18M | ﹤0.01% |
206,600
+36,000
| +21% | +$199K |
|
2606
Viavi Solutions
VIAV
$10B
| $1.18M | ﹤0.01% |
24,677
-2,743
| -10% | -$131K |
|
2607
PUT
Academy Sports + Outdoors
ASO
$3.03B
| $1.18M | ﹤0.01% |
25,000
+600
| +2% | +$31.9K |
|
|
XIFR
2608
PUT
XPLR Infrastructure LP
XIFR
$995M
| $1.18M | ﹤0.01% |
99,700
+35,500
| +55% | +$397K |
|
2609
CALL
Evolv Technologies
EVLV
$868M
| $1.18M | ﹤0.01% |
203,000
-299,100
| -60% | -$1.87M |
|
2610
Vishay Precision Group
VPG
$954M
| $1.18M | ﹤0.01% |
7,850
+6,737
| +605% | +$625K |
|
|
TGB
2611
CALL
Trekor Metals
TGB
$3.15B
| $1.17M | ﹤0.01% |
170,700
-4,200
| -2% | -$30K |
|
2612
PUT
Samsara
IOT
$22.2B
| $1.17M | ﹤0.01% |
36,200
-7,000
| -16% | -$217K |
|
2613
PUT
Sigma Lithium
SGML
$1.08B
| $1.17M | ﹤0.01% |
92,500
-4,600
| -5% | -$77.3K |
|
|
LAR
2614
CALL
Lithium Argentina AG
LAR
$906M
| $1.17M | ﹤0.01% |
141,400
-136,600
| -49% | -$1.27M |
|
2615
CALL
Indivior Pharmaceuticals
INDV
$4.23B
| $1.17M | ﹤0.01% |
28,500
+24,000
| +533% | +$871K |
|
2616
Ondas Inc
ONDS
$4.45B
| $1.17M | ﹤0.01% |
141,892
-45,086
| -24% | -$445K |
|
2617
Clorox
CLX
$10.1B
| $1.17M | ﹤0.01% |
12,215
-6,493
| -35% | -$623K |
|
2618
CALL
TAL Education Group
TAL
$6.66B
| $1.17M | ﹤0.01% |
121,800
+100,800
| +480% | +$1.06M |
|
2619
CALL
Hayward Holdings
HAYW
$2.68B
| $1.16M | ﹤0.01% |
67,200
+19,600
| +41% | +$286K |
|
2620
PUT
International Paper
IP
$18.5B
| $1.16M | ﹤0.01% |
30,500
-7,500
| -20% | -$257K |
|
|
BETA
2621
PUT
Beta Technologies Inc
BETA
$5.58B
| $1.16M | ﹤0.01% |
69,200
+54,200
| +361% | +$902K |
|
|
BIOA
2622
BioAge Labs
BIOA
$324M
| $1.16M | ﹤0.01% |
47,280
+44,958
| +1,936% | +$812K |
|
2623
CALL
ZIM Integrated Shipping Services
ZIM
$3.52B
| $1.16M | ﹤0.01% |
44,500
-24,500
| -36% | -$632K |
|
2624
PUT
Polaris
PII
$3.02B
| $1.16M | ﹤0.01% |
16,900
+1,400
| +9% | +$90.2K |
|
|
ETH
2625
Grayscale Ethereum Staking Mini ETF Shares
ETH
$2.26B
| $1.16M | ﹤0.01% |
76,955
+5,406
| +8% | +$106K |
|
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.