Insider · CIK 0001838061
Jennifer Michaelson
Files at CGEM (Cullinan Oncology, Inc.). First filing Dec 13, 2023, latest Sep 10, 2026.
In brief
Jennifer Michaelson files SEC Form 4 as officer at CGEM (Cullinan Oncology, Inc.). Since Dec 13, 2023, Jennifer Michaelson has reported 0 open-market buys worth $0 and 22 open-market sells worth $1.9M, the latest filed on Sep 10, 2026.
A track record needs three past buys with six months of prices behind them; Jennifer Michaelson has 0, so none is measured yet.
The newest scored trade: sold $173k of CGEM on Sep 8, 2026, filed Sep 10, 2026, scored 0 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 14 sells worth $1.6M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CGEM: Cullinan Oncology, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 0Weak | Cullinan Oncology, Inc. | $173k 8,000 shares | -5% | +277% from low-5% from high | |
| 5Weak | Cullinan Oncology, Inc. | $608k 30,000 shares | -16% | +242% from low0% from high | |
| 0Weak | Cullinan Oncology, Inc. | $143k 8,000 shares | -5% | +210% from low-4% from high | |
| 0Weak | Cullinan Oncology, Inc. | $117k 8,000 shares | -5% | +160% from low-8% from high | |
| 6Weak | Cullinan Oncology, Inc. | $125k 8,000 shares | -4% | +171% from low-4% from high | |
| 15Weak | Cullinan Oncology, Inc. | $25k 1,780 shares | -1% | +150% from low0% from high | |
| 18Weak | Cullinan Oncology, Inc. | $77k 5,353 shares | -3% | +143% from low0% from high | |
| 6Weak | Cullinan Oncology, Inc. | $165k 11,742 shares | -6% | +137% from low-2% from high | |
| 30Weak | Cullinan Oncology, Inc. | $5,004 416 shares | -0% | +103% from low-12% from high | |
| 2Weak | Cullinan Oncology, Inc. | $49k 4,000 shares | -3% | +119% from low-3% from high | |
| 10Weak | Cullinan Oncology, Inc. | $13k 1,345 shares | -1% | +68% from low-25% from high | |
| 35Weak | Cullinan Oncology, Inc. | $28k 2,898 shares | -2% | +74% from low-23% from high | |
| 16Weak | Cullinan Oncology, Inc. | $38k 3,143 shares | -2% | +107% from low-8% from high | |
| 2Weak | Cullinan Oncology, Inc. | $49k 4,000 shares | -3% | +125% from low-4% from high | |
| 35Weak | Cullinan Oncology, Inc. | $32k 3,756 shares | -3% | 0% from low-53% from high | |
| 10Weak | Cullinan Oncology, Inc. | $50k 4,000 shares | -4% | +9% from low-35% from high | |
| 37Weak | Cullinan Oncology, Inc. | $54k 4,693 shares | -4% | - | |
| 36Weak | Cullinan Oncology, Inc. | $44k 3,489 shares | -3% | - | |
| 6Weak | Cullinan Oncology, Inc. | $125k 8,000 shares | -7% | - | |
| 30Weak | Cullinan Oncology, Inc. | $9,733 1,145 shares | -1% | +20% from low-29% from high | |
| 30Weak | Cullinan Oncology, Inc. | $1,956 238 shares | -0% | +16% from low-32% from high | |
| 30Weak | Cullinan Oncology, Inc. | $8,341 1,068 shares | -1% | 0% from low-41% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 8, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $177k | Sep 8, 2026 | $750k |
| Aug 13, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 30,000 0.05% of outstanding | $588k | Aug 13, 2026 | $143k |
| Jul 6, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $141k | Jul 6, 2026 | $117k |
| May 5, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $123k | May 5, 2026 | $398k |
| Mar 5, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $130k | Mar 5, 2026 | $401k |
| Feb 25, 2026 | CGEM CULLINAN THERAPEUTICS INC | 1,780 0.00% of outstanding | $25k | Feb 25, 2026 | $273k |
| Feb 23, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 1,752 0.00% of outstanding | $24k | Feb 23, 2026 | $298k |
| Feb 20, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $111k | Feb 20, 2026 | $183k |
| Jan 22, 2026 | CGEM CULLINAN THERAPEUTICS, INC. | 4,000 0.01% of outstanding | $46k | Jan 22, 2026 | $101k |
| Dec 19, 2025 | CGEM CULLINAN THERAPEUTICS, INC. | 1,345 0.00% of outstanding | $13k | Dec 19, 2025 | $88k |
| Dec 15, 2025 | CGEM CULLINAN THERAPEUTICS, INC. | 995 0.00% of outstanding | $12k | Dec 15, 2025 | $49k |
| Nov 24, 2025 | CGEM CULLINAN THERAPEUTICS, INC. | 4,000 0.01% of outstanding | $38k | Nov 24, 2025 | none |
| Jan 6, 2025 | CGEM CULLINAN THERAPEUTICS, INC. | 8,000 0.01% of outstanding | $101k | Jan 6, 2025 | $222k |
Transactions
Every row this insider has filed, 42 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 8, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +4,000 | $4.30 | $17k | 166,844 | 33 d ago |
| Sep 8, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -8,000 | $21.57 | $173k | 158,844 | 33 d ago |
| Sep 8, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,000 | $0.00 | $0 | 78,987 | 33 d ago |
| Aug 13, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +30,000 | $4.30 | $129k | 192,844 | Aug 14, 2026 |
| Aug 13, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -30,000 | $20.26 | $608k | 162,844 | Aug 14, 2026 |
| Aug 13, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -30,000 | $0.00 | $0 | 82,987 | Aug 14, 2026 |
| Jul 6, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +4,000 | $4.30 | $17k | 170,844 | Jul 7, 2026 |
| Jul 6, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -8,000 | $17.82 | $143k | 162,844 | Jul 7, 2026 |
| Jul 6, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,000 | $0.00 | $0 | 112,987 | Jul 7, 2026 |
| May 5, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +4,000 | $4.30 | $17k | 174,844 | May 6, 2026 |
| May 5, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -7,800 | $14.60 | $114k | 167,044 | May 6, 2026 |
| May 5, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -200 | $15.58 | $3,116 | 166,844 | May 6, 2026 |
| May 5, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,000 | $0.00 | $0 | 116,987 | May 6, 2026 |
| Mar 5, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +4,000 | $4.30 | $17k | 178,844 | Mar 9, 2026 |
| Mar 5, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -8,000 | $15.68 | $125k | 170,844 | Mar 9, 2026 |
| Mar 5, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,000 | $0.00 | $0 | 120,987 | Mar 9, 2026 |
| Feb 25, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -1,780 | $14.14 | $25k | 174,844 | Feb 26, 2026 |
| Feb 23, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -1,752 | $13.99 | $25k | 180,225 | Feb 25, 2026 |
| Feb 24, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -3,601 | $14.47 | $52k | 176,624 | Feb 25, 2026 |
| Feb 20, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -3,742 | $13.62 | $51k | 181,977 | Feb 23, 2026 |
| Feb 20, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Common Stock10b5-1 | +8,000 | $4.30 | $34k | 189,977 | Feb 23, 2026 |
| Feb 20, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -8,000 | $14.30 | $114k | 181,977 | Feb 23, 2026 |
| Feb 20, 2026 | CGEM Cullinan Oncology, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -8,000 | $0.00 | $0 | 124,987 | Feb 23, 2026 |
| Feb 18, 2026 | CGEM Cullinan Oncology, Inc. | AGrant or award Common Stock | +57,500 | $0.00 | $0 | 185,719 | Feb 19, 2026 |
| Feb 18, 2026 | CGEM Cullinan Oncology, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +115,000 | $0.00 | $0 | 115,000 | Feb 19, 2026 |
| Feb 12, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -416 | $12.03 | $5,004 | 128,219 | Feb 13, 2026 |
| Jan 22, 2026 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -4,000 | $12.30 | $49k | 128,635 | Jan 23, 2026 |
| Dec 19, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -1,345 | $10.01 | $13k | 132,635 | Dec 22, 2025 |
| Dec 18, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -2,898 | $9.67 | $28k | 133,980 | Dec 19, 2025 |
| Dec 12, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -2,148 | $12.38 | $27k | 137,873 | Dec 16, 2025 |
| Dec 15, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -995 | $11.90 | $12k | 136,878 | Dec 16, 2025 |
| Nov 24, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -4,000 | $12.30 | $49k | 138,004 | Nov 25, 2025 |
| Feb 25, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -3,756 | $8.53 | $32k | 142,004 | Feb 27, 2025 |
| Feb 19, 2025 | CGEM Cullinan Oncology, Inc. | AGrant or award Common Stock | +50,000 | $0.00 | $0 | 145,760 | Feb 21, 2025 |
| Feb 19, 2025 | CGEM Cullinan Oncology, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +100,000 | $0.00 | $0 | 100,000 | Feb 21, 2025 |
| Jan 6, 2025 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -4,000 | $12.51 | $50k | 95,760 | Jan 7, 2025 |
| Dec 18, 2024 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -4,693 | $11.41 | $54k | 99,760 | Dec 20, 2024 |
| Dec 12, 2024 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -3,489 | $12.52 | $44k | 104,453 | Dec 16, 2024 |
| Nov 5, 2024 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock10b5-1 | -8,000 | $15.64 | $125k | 107,942 | Nov 7, 2024 |
| Dec 21, 2023 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -1,145 | $8.50 | $9,733 | 87,582 | Dec 22, 2023 |
| Dec 18, 2023 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -238 | $8.22 | $1,956 | 88,727 | Dec 20, 2023 |
| Dec 12, 2023 | CGEM Cullinan Oncology, Inc. | SOpen-market sale Common Stock | -1,068 | $7.81 | $8,341 | 88,965 | Dec 13, 2023 |
Questions about Jennifer Michaelson
Answered from the filings on this page, as of the latest one.
Is Jennifer Michaelson buying or selling?
In the last 12 months Jennifer Michaelson reported 0 open-market buys worth $0 and 14 open-market sells worth $1.6M on SEC Form 4; the latest was sold $173k of CGEM on Sep 8, 2026. Grants, option exercises and tax withholding are not counted.
How did Jennifer Michaelson's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Jennifer Michaelson has 0.
Where does Jennifer Michaelson file Form 4?
Jennifer Michaelson has filed Form 4 at CGEM (Cullinan Oncology, Inc.) as Chief Scientific Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.