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 |
Microsoft
MSFT
|
+$234M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$97.5M |
| 3 |
Amazon
AMZN
|
+$96.8M |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$129M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$92.9M |
| 3 |
Broadcom
AVGO
|
+$82.9M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.79% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Healthcare | 0.25% |
| 4 | Financials | 0.17% |
| 5 | Industrials | 0.09% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5126
CALL
Clarivate
CLVT
$1.25B
| $172K | ﹤0.01% |
45,100
-2,600
| -5% | -$10.9K |
|
5127
CALL
Genco Shipping & Trading
GNK
$1.12B
| $172K | ﹤0.01% |
9,700
-7,500
| -44% | -$124K |
|
5128
Teucrium Soybean Fund
SOYB
$61.2M
| $172K | ﹤0.01% |
8,038
-1,693
| -17% | -$37K |
|
5129
CALL
Spyre Therapeutics
SYRE
$8.46B
| $172K | ﹤0.01% |
10,300
+10,200
| +10,200% | +$166K |
|
5130
CALL
H&R Block
HRB
$5.48B
| $171K | ﹤0.01% |
3,400
-5,800
| -63% | -$307K |
|
|
ORLA
5131
CALL
Orla Mining
ORLA
$3.54B
| $171K | ﹤0.01% |
15,900
-22,500
| -59% | -$241K |
|
5132
PUT
Krispy Kreme
DNUT
$560M
| $170K | ﹤0.01% |
44,000
+40,300
| +1,089% | +$139K |
|
5133
PUT
Haemonetics
HAE
$3.85B
| $170K | ﹤0.01% |
3,500
-4,200
| -55% | -$260K |
|
5134
PUT
Lindblad Expeditions
LIND
$1.93B
| $170K | ﹤0.01% |
13,300
+12,300
| +1,230% | +$162K |
|
|
LTC
5135
LTC Properties
LTC
$2.03B
| $170K | ﹤0.01% |
4,616
+3,923
| +566% | +$140K |
|
5136
TriplePoint Venture Growth BDC
TPVG
$184M
| $170K | ﹤0.01% |
29,634
+5,602
| +23% | +$37.3K |
|
5137
CALL
Winnebago Industries
WGO
$849M
| $170K | ﹤0.01% |
5,100
-5,000
| -50% | -$165K |
|
5138
CALL
Eton Pharmaceutcials
ETON
$1.29B
| $169K | ﹤0.01% |
7,800
-31,400
| -80% | -$521K |
|
5139
CALL
Kymera Therapeutics
KYMR
$8.53B
| $169K | ﹤0.01% |
3,000
-27,100
| -90% | -$1.22M |
|
5140
CALL
Old National Bancorp
ONB
$10.1B
| $169K | ﹤0.01% |
7,700
+3,900
| +103% | +$86.2K |
|
5141
CALL
Vishay Precision Group
VPG
$1.21B
| $169K | ﹤0.01% |
5,300
-13,800
| -72% | -$399K |
|
5142
PUT
Vuzix
VUZI
$197M
| $169K | ﹤0.01% |
54,200
-6,300
| -10% | -$14.9K |
|
|
NFLU
5143
T-Rex 2X Long NFLX Daily Target ETF
NFLU
$54.8M
| $169K | ﹤0.01% |
2,978
+2,529
| +563% | +$152K |
|
5144
PUT
Cushman & Wakefield Ltd
CWK
$3.24B
| $168K | ﹤0.01% |
10,600
| – | – |
|
5145
PUT
Establishment Labs
ESTA
$2.73B
| $168K | ﹤0.01% |
4,100
-7,700
| -65% | -$315K |
|
|
HPP
5146
PUT
Hudson Pacific Properties
HPP
$760M
| $168K | ﹤0.01% |
8,714
-54,072
| -86% | -$1.02M |
|
5147
CALL
Alliant Energy
LNT
$18.1B
| $168K | ﹤0.01% |
2,500
+900
| +56% | +$58.1K |
|
5148
PUT
VistaGen Therapeutics
VTGN
$10.2M
| $168K | ﹤0.01% |
+47,500
| New | +$142K |
|
5149
Cemex
CX
$17B
| $167K | ﹤0.01% |
18,579
-69,624
| -79% | -$594K |
|
|
LX
5150
PUT
LexinFintech Holdings
LX
$244M
| $167K | ﹤0.01% |
31,400
+2,800
| +10% | +$17.9K |
|
Similar funds
Simplex Trading's Q3 2025 Portfolio in Review
As of Q3 2025, Simplex Trading held 10,358 positions worth $195B, up 12% from $175B the previous quarter. Its ten largest holdings account for 46% of the portfolio.
Simplex Trading's Q3 2025 filing shows 1,743 new, 3,828 increased, 3,250 reduced and 1,308 closed positions. Its largest new stake was Microsoft: 458,309 shares worth $237M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $129M.
By sector, the portfolio is most concentrated in Technology at 0.79% of assets, up from 0.74% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2025 buy was Microsoft: 458,309 shares worth $237M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q3 2025, an estimated $97.5M increase.
- Simplex Trading's biggest Q3 2025 reduction was Alphabet (Google) Class A, cutting an estimated $92.9M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q3 2025, selling an estimated $129M.
- Simplex Trading's ten largest holdings make up 46% of its $195B portfolio in Q3 2025.
- Simplex Trading opened 1,743 new positions and closed 1,308 in Q3 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $195B.
Based on Simplex Trading's 13F filing for Q3 2025, filed 12 Nov 2025.